Merge branch 'master' into sp/fast-import

I'm bringing master in early so that the OBJ_OFS_DELTA implementation
is available as part of the topic.  This way git-fast-import can
learn about this new slightly smaller and faster packfile format,
and can generate them directly rather than needing to have them be
repacked with git-pack-objects.

Due to the API changes in master during the period of development
of git-fast-import, a few minor tweaks to fast-import.c are needed
to produce a working merge.  I've done them here as part of the
merge to ensure bisection always works.

Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

4 files changed, 3096 insertions, 988 deletions

diff --git a/gitweb/README b/gitweb/README
index 27c6dac14..e02e90f04 100644
--- a/gitweb/README
+++ b/gitweb/README
@@ -1,4 +1,5 @@
 GIT web Interface
+=================
 
 The one working on:
   http://www.kernel.org/git/
@@ -6,7 +7,8 @@ The one working on:
 From the git version 1.4.0 gitweb is bundled with git.
 
 
-How to configure gitweb for your local system:
+How to configure gitweb for your local system
+---------------------------------------------
 
 You can specify the following configuration variables when building GIT:
  * GITWEB_SITENAME
@@ -24,11 +26,54 @@ You can specify the following configuration variables when building GIT:
  * GITWEB_LOGO
    Points to the location where you put git-logo.png on your web server.
  * GITWEB_CONFIG
-   This file will be loaded using 'require'.  If the environment
+   This file will be loaded using 'require' and can be used to override any
+   of the options above as well as some other options - see the top of
+   'gitweb.cgi' for their full list and description.  If the environment
    $GITWEB_CONFIG is set when gitweb.cgi is executed the file in the
    environment variable will be loaded instead of the file
    specified when gitweb.cgi was created.
 
+
+Runtime gitweb configuration
+----------------------------
+
+You can adjust gitweb behaviour using the file specified in `GITWEB_CONFIG`
+(defaults to 'gitweb_config.perl' in the same directory as the CGI).
+See the top of 'gitweb.cgi' for the list of variables and some description.
+The most notable thing that is not configurable at compile time are the
+optional features, stored in the '%features' variable. You can find further
+description on how to reconfigure the default features setting in your
+`GITWEB_CONFIG` or per-project in `project.git/config` inside 'gitweb.cgi'.
+
+
+Webserver configuration
+-----------------------
+
+If you want to have one URL for both gitweb and your http://
+repositories, you can configure apache like this:
+
+<VirtualHost www:80>
+    ServerName git.domain.org
+    DocumentRoot /pub/git
+    RewriteEngine on
+    RewriteRule ^/(.*\.git/(?!/?(info|objects|refs)).*)?$ /cgi-bin/gitweb.cgi%{REQUEST_URI}  [L,PT]
+    SetEnv	GITWEB_CONFIG	/etc/gitweb.conf
+</VirtualHost>
+
+The above configuration expects your public repositories to live under
+/pub/git and will serve them as http://git.domain.org/dir-under-pub-git,
+both as cloneable GIT URL and as browseable gitweb interface.
+If you then start your git-daemon with --base-path=/pub/git --export-all
+then you can even use the git:// URL with exactly the same path.
+
+Setting the environment variable GITWEB_CONFIG will tell gitweb to use
+the named file (i.e. in this example /etc/gitweb.conf) as a
+configuration for gitweb.  Perl variables defined in here will
+override the defaults given at the head of the gitweb.perl (or
+gitweb.cgi).  Look at the comments in that file for information on
+which variables and what they mean.
+
+
 Originally written by:
   Kay Sievers <kay.sievers@vrfy.org>
 
diff --git a/gitweb/git-favicon.png b/gitweb/git-favicon.png
new file mode 100644
index 000000000..de637c060
--- /dev/null
+++ b/gitweb/git-favicon.png
diff --git a/gitweb/gitweb.css b/gitweb/gitweb.css
index 901389585..7177c6e86 100644
--- a/gitweb/gitweb.css
+++ b/gitweb/gitweb.css
@@ -16,6 +16,18 @@ a:hover, a:visited, a:active {
 	color: #880000;
 }
 
+span.cntrl {
+	border: dashed #aaaaaa;
+	border-width: 1px;
+	padding: 0px 2px 0px 2px;
+	margin:  0px 2px 0px 2px;
+}
+
+img.logo {
+	float: right;
+	border-width: 0px;
+}
+
 div.page_header {
 	height: 25px;
 	padding: 8px;
@@ -42,6 +54,7 @@ div.page_nav a:visited {
 
 div.page_path {
 	padding: 8px;
+	font-weight: bold;
 	border: solid #d9d8d1;
 	border-width: 0px 0px 1px;
 }
@@ -115,13 +128,23 @@ div.list_head {
 	font-style: italic;
 }
 
+div.author_date {
+	padding: 8px;
+	border: solid #d9d8d1;
+	border-width: 0px 0px 1px 0px;
+	font-style: italic;
+}
+
 a.list {
 	text-decoration: none;
-	font-weight: bold;
 	color: #000000;
 }
 
-table.tags a.list {
+a.subject, a.name {
+	font-weight: bold;
+}
+
+table.tags a.subject {
 	font-weight: normal;
 }
 
@@ -162,6 +185,12 @@ table.blame {
 	border-collapse: collapse;
 }
 
+table.blame td {
+	padding: 0px 5px;
+	font-size: 12px;
+	vertical-align: top;
+}
+
 th {
 	padding: 2px 5px;
 	font-size: 12px;
@@ -269,25 +298,96 @@ td.mode {
 	font-family: monospace;
 }
 
+/* styling of diffs (patchsets): commitdiff and blobdiff views */
+div.diff.header,
+div.diff.extended_header {
+	white-space: normal;
+}
+
+div.diff.header {
+	font-weight: bold;
+
+	background-color: #edece6;
+
+	margin-top: 4px;
+	padding: 4px 0px 2px 0px;
+	border: solid #d9d8d1;
+	border-width: 1px 0px 1px 0px;
+}
+
+div.diff.header a.path {
+	text-decoration: underline;
+}
+
+div.diff.extended_header,
+div.diff.extended_header a.path,
+div.diff.extended_header a.hash {
+	color: #777777;
+}
+
+div.diff.extended_header .info {
+	color: #b0b0b0;
+}
+
+div.diff.extended_header {
+	background-color: #f6f5ee;
+	padding: 2px 0px 2px 0px;
+}
+
+div.diff a.list,
+div.diff a.path,
+div.diff a.hash {
+	text-decoration: none;
+}
+
+div.diff a.list:hover,
+div.diff a.path:hover,
+div.diff a.hash:hover {
+	text-decoration: underline;
+}
+
+div.diff.to_file a.path,
+div.diff.to_file {
+	color: #007000;
+}
+
 div.diff.add {
 	color: #008800;
 }
 
+div.diff.from_file a.path,
+div.diff.from_file {
+	color: #aa0000;
+}
+
 div.diff.rem {
 	color: #cc0000;
 }
 
+div.diff.chunk_header a,
 div.diff.chunk_header {
 	color: #990099;
 }
 
-div.diff_info {
-	font-family: monospace;
-	color: #000099;
-	background-color: #edece6;
-	font-style: italic;
+div.diff.chunk_header {
+	border: dotted #ffe0ff;
+	border-width: 1px 0px 0px 0px;
+	margin-top: 2px;
+}
+
+div.diff.chunk_header span.chunk_info {
+	background-color: #ffeeff;
 }
 
+div.diff.chunk_header span.section {
+	color: #aa22aa;
+}
+
+div.diff.incomplete {
+	color: #cccccc;
+}
+
+
 div.index_include {
 	border: solid #d9d8d1;
 	border-width: 0px 0px 1px;
@@ -295,6 +395,8 @@ div.index_include {
 }
 
 div.search {
+	font-size: 12px;
+	font-weight: normal;
 	margin: 4px 8px;
 	position: absolute;
 	top: 56px;
diff --git a/gitweb/gitweb.perl b/gitweb/gitweb.perl
index 04282fa5e..88af2e638 100755
--- a/gitweb/gitweb.perl
+++ b/gitweb/gitweb.perl
@@ -15,8 +15,13 @@ use CGI::Carp qw(fatalsToBrowser);
 use Encode;
 use Fcntl ':mode';
 use File::Find qw();
+use File::Basename qw(basename);
 binmode STDOUT, ':utf8';
 
+BEGIN {
+	CGI->compile() if $ENV{MOD_PERL};
+}
+
 our $cgi = new CGI;
 our $version = "++GIT_VERSION++";
 our $my_url = $cgi->url();
@@ -30,33 +35,52 @@ our $GIT = "++GIT_BINDIR++/git";
 #our $projectroot = "/pub/scm";
 our $projectroot = "++GITWEB_PROJECTROOT++";
 
-# location for temporary files needed for diffs
-our $git_temp = "/tmp/gitweb";
-
 # target of the home link on top of all pages
-our $home_link = $my_uri;
+our $home_link = $my_uri || "/";
 
 # string of the home link on top of all pages
 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
 
 # name of your site or organization to appear in page titles
 # replace this with something more descriptive for clearer bookmarks
-our $site_name = "++GITWEB_SITENAME++" || $ENV{'SERVER_NAME'} || "Untitled";
+our $site_name = "++GITWEB_SITENAME++"
+                 || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
 
+# filename of html text to include at top of each page
+our $site_header = "++GITWEB_SITE_HEADER++";
 # html text to include at home page
 our $home_text = "++GITWEB_HOMETEXT++";
-
-# URI of default stylesheet
-our $stylesheet = "++GITWEB_CSS++";
-# URI of GIT logo
+# filename of html text to include at bottom of each page
+our $site_footer = "++GITWEB_SITE_FOOTER++";
+
+# URI of stylesheets
+our @stylesheets = ("++GITWEB_CSS++");
+# URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
+our $stylesheet = undef;
+# URI of GIT logo (72x27 size)
 our $logo = "++GITWEB_LOGO++";
+# URI of GIT favicon, assumed to be image/png type
+our $favicon = "++GITWEB_FAVICON++";
+
+# URI and label (title) of GIT logo link
+#our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
+#our $logo_label = "git documentation";
+our $logo_url = "http://git.or.cz/";
+our $logo_label = "git homepage";
 
 # source of projects list
 our $projects_list = "++GITWEB_LIST++";
 
+# show repository only if this file exists
+# (only effective if this variable evaluates to true)
+our $export_ok = "++GITWEB_EXPORT_OK++";
+
+# only allow viewing of repositories also shown on the overview page
+our $strict_export = "++GITWEB_STRICT_EXPORT++";
+
 # list of git base URLs used for URL to where fetch project from,
 # i.e. full URL is "$git_base_url/$project"
-our @git_base_url_list = ("++GITWEB_BASE_URL++");
+our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 
 # default blob_plain mimetype and default charset for text/plain blob
 our $default_blob_plain_mimetype = 'text/plain';
@@ -66,16 +90,198 @@ our $default_text_plain_charset  = undef;
 # (relative to the current git repository)
 our $mimetypes_file = undef;
 
+# You define site-wide feature defaults here; override them with
+# $GITWEB_CONFIG as necessary.
+our %feature = (
+	# feature => {
+	# 	'sub' => feature-sub (subroutine),
+	# 	'override' => allow-override (boolean),
+	# 	'default' => [ default options...] (array reference)}
+	#
+	# if feature is overridable (it means that allow-override has true value,
+	# then feature-sub will be called with default options as parameters;
+	# return value of feature-sub indicates if to enable specified feature
+	#
+	# use gitweb_check_feature(<feature>) to check if <feature> is enabled
+
+	# Enable the 'blame' blob view, showing the last commit that modified
+	# each line in the file. This can be very CPU-intensive.
+
+	# To enable system wide have in $GITWEB_CONFIG
+	# $feature{'blame'}{'default'} = [1];
+	# To have project specific config enable override in $GITWEB_CONFIG
+	# $feature{'blame'}{'override'} = 1;
+	# and in project config gitweb.blame = 0|1;
+	'blame' => {
+		'sub' => \&feature_blame,
+		'override' => 0,
+		'default' => [0]},
+
+	# Enable the 'snapshot' link, providing a compressed tarball of any
+	# tree. This can potentially generate high traffic if you have large
+	# project.
+
+	# To disable system wide have in $GITWEB_CONFIG
+	# $feature{'snapshot'}{'default'} = [undef];
+	# To have project specific config enable override in $GITWEB_CONFIG
+	# $feature{'snapshot'}{'override'} = 1;
+	# and in project config gitweb.snapshot = none|gzip|bzip2;
+	'snapshot' => {
+		'sub' => \&feature_snapshot,
+		'override' => 0,
+		#         => [content-encoding, suffix, program]
+		'default' => ['x-gzip', 'gz', 'gzip']},
+
+	# Enable text search, which will list the commits which match author,
+	# committer or commit text to a given string.  Enabled by default.
+	'search' => {
+		'override' => 0,
+		'default' => [1]},
+
+	# Enable the pickaxe search, which will list the commits that modified
+	# a given string in a file. This can be practical and quite faster
+	# alternative to 'blame', but still potentially CPU-intensive.
+
+	# To enable system wide have in $GITWEB_CONFIG
+	# $feature{'pickaxe'}{'default'} = [1];
+	# To have project specific config enable override in $GITWEB_CONFIG
+	# $feature{'pickaxe'}{'override'} = 1;
+	# and in project config gitweb.pickaxe = 0|1;
+	'pickaxe' => {
+		'sub' => \&feature_pickaxe,
+		'override' => 0,
+		'default' => [1]},
+
+	# Make gitweb use an alternative format of the URLs which can be
+	# more readable and natural-looking: project name is embedded
+	# directly in the path and the query string contains other
+	# auxiliary information. All gitweb installations recognize
+	# URL in either format; this configures in which formats gitweb
+	# generates links.
+
+	# To enable system wide have in $GITWEB_CONFIG
+	# $feature{'pathinfo'}{'default'} = [1];
+	# Project specific override is not supported.
+
+	# Note that you will need to change the default location of CSS,
+	# favicon, logo and possibly other files to an absolute URL. Also,
+	# if gitweb.cgi serves as your indexfile, you will need to force
+	# $my_uri to contain the script name in your $GITWEB_CONFIG.
+	'pathinfo' => {
+		'override' => 0,
+		'default' => [0]},
+
+	# Make gitweb consider projects in project root subdirectories
+	# to be forks of existing projects. Given project $projname.git,
+	# projects matching $projname/*.git will not be shown in the main
+	# projects list, instead a '+' mark will be added to $projname
+	# there and a 'forks' view will be enabled for the project, listing
+	# all the forks. This feature is supported only if project list
+	# is taken from a directory, not file.
+
+	# To enable system wide have in $GITWEB_CONFIG
+	# $feature{'forks'}{'default'} = [1];
+	# Project specific override is not supported.
+	'forks' => {
+		'override' => 0,
+		'default' => [0]},
+);
+
+sub gitweb_check_feature {
+	my ($name) = @_;
+	return unless exists $feature{$name};
+	my ($sub, $override, @defaults) = (
+		$feature{$name}{'sub'},
+		$feature{$name}{'override'},
+		@{$feature{$name}{'default'}});
+	if (!$override) { return @defaults; }
+	if (!defined $sub) {
+		warn "feature $name is not overrideable";
+		return @defaults;
+	}
+	return $sub->(@defaults);
+}
+
+sub feature_blame {
+	my ($val) = git_get_project_config('blame', '--bool');
+
+	if ($val eq 'true') {
+		return 1;
+	} elsif ($val eq 'false') {
+		return 0;
+	}
+
+	return $_[0];
+}
+
+sub feature_snapshot {
+	my ($ctype, $suffix, $command) = @_;
+
+	my ($val) = git_get_project_config('snapshot');
+
+	if ($val eq 'gzip') {
+		return ('x-gzip', 'gz', 'gzip');
+	} elsif ($val eq 'bzip2') {
+		return ('x-bzip2', 'bz2', 'bzip2');
+	} elsif ($val eq 'none') {
+		return ();
+	}
+
+	return ($ctype, $suffix, $command);
+}
+
+sub gitweb_have_snapshot {
+	my ($ctype, $suffix, $command) = gitweb_check_feature('snapshot');
+	my $have_snapshot = (defined $ctype && defined $suffix);
+
+	return $have_snapshot;
+}
+
+sub feature_pickaxe {
+	my ($val) = git_get_project_config('pickaxe', '--bool');
+
+	if ($val eq 'true') {
+		return (1);
+	} elsif ($val eq 'false') {
+		return (0);
+	}
+
+	return ($_[0]);
+}
+
+# checking HEAD file with -e is fragile if the repository was
+# initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
+# and then pruned.
+sub check_head_link {
+	my ($dir) = @_;
+	my $headfile = "$dir/HEAD";
+	return ((-e $headfile) ||
+		(-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
+}
+
+sub check_export_ok {
+	my ($dir) = @_;
+	return (check_head_link($dir) &&
+		(!$export_ok || -e "$dir/$export_ok"));
+}
+
+# rename detection options for git-diff and git-diff-tree
+# - default is '-M', with the cost proportional to
+#   (number of removed files) * (number of new files).
+# - more costly is '-C' (or '-C', '-M'), with the cost proportional to
+#   (number of changed files + number of removed files) * (number of new files)
+# - even more costly is '-C', '--find-copies-harder' with cost
+#   (number of files in the original tree) * (number of new files)
+# - one might want to include '-B' option, e.g. '-B', '-M'
+our @diff_opts = ('-M'); # taken from git_commit
+
 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
-require $GITWEB_CONFIG if -e $GITWEB_CONFIG;
+do $GITWEB_CONFIG if -e $GITWEB_CONFIG;
 
 # version of the core git binary
 our $git_version = qx($GIT --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 
 $projects_list ||= $projectroot;
-if (! -d $git_temp) {
-	mkdir($git_temp, 0700) || die_error(undef, "Couldn't mkdir $git_temp");
-}
 
 # ======================================================================
 # input validation and dispatch
@@ -84,65 +290,68 @@ if (defined $action) {
 	if ($action =~ m/[^0-9a-zA-Z\.\-_]/) {
 		die_error(undef, "Invalid action parameter");
 	}
-	# action which does not check rest of parameters
-	if ($action eq "opml") {
-		git_opml();
-		exit;
-	}
 }
 
-our $project = ($cgi->param('p') || $ENV{'PATH_INFO'});
+# parameters which are pathnames
+our $project = $cgi->param('p');
 if (defined $project) {
-	$project =~ s|^/||;
-	$project =~ s|/$||;
-}
-if (defined $project && $project) {
-	if (!validate_input($project)) {
-		die_error(undef, "Invalid project parameter");
-	}
-	if (!(-d "$projectroot/$project")) {
-		die_error(undef, "No such directory");
-	}
-	if (!(-e "$projectroot/$project/HEAD")) {
+	if (!validate_pathname($project) ||
+	    !(-d "$projectroot/$project") ||
+	    !check_head_link("$projectroot/$project") ||
+	    ($export_ok && !(-e "$projectroot/$project/$export_ok")) ||
+	    ($strict_export && !project_in_list($project))) {
+		undef $project;
 		die_error(undef, "No such project");
 	}
-	$ENV{'GIT_DIR'} = "$projectroot/$project";
-} else {
-	git_project_list();
-	exit;
 }
 
 our $file_name = $cgi->param('f');
 if (defined $file_name) {
-	if (!validate_input($file_name)) {
+	if (!validate_pathname($file_name)) {
 		die_error(undef, "Invalid file parameter");
 	}
 }
 
+our $file_parent = $cgi->param('fp');
+if (defined $file_parent) {
+	if (!validate_pathname($file_parent)) {
+		die_error(undef, "Invalid file parent parameter");
+	}
+}
+
+# parameters which are refnames
 our $hash = $cgi->param('h');
 if (defined $hash) {
-	if (!validate_input($hash)) {
+	if (!validate_refname($hash)) {
 		die_error(undef, "Invalid hash parameter");
 	}
 }
 
 our $hash_parent = $cgi->param('hp');
 if (defined $hash_parent) {
-	if (!validate_input($hash_parent)) {
+	if (!validate_refname($hash_parent)) {
 		die_error(undef, "Invalid hash parent parameter");
 	}
 }
 
 our $hash_base = $cgi->param('hb');
 if (defined $hash_base) {
-	if (!validate_input($hash_base)) {
+	if (!validate_refname($hash_base)) {
 		die_error(undef, "Invalid hash base parameter");
 	}
 }
 
+our $hash_parent_base = $cgi->param('hpb');
+if (defined $hash_parent_base) {
+	if (!validate_refname($hash_parent_base)) {
+		die_error(undef, "Invalid hash parent base parameter");
+	}
+}
+
+# other parameters
 our $page = $cgi->param('pg');
 if (defined $page) {
-	if ($page =~ m/[^0-9]$/) {
+	if ($page =~ m/[^0-9]/) {
 		die_error(undef, "Invalid page parameter");
 	}
 }
@@ -152,9 +361,68 @@ if (defined $searchtext) {
 	if ($searchtext =~ m/[^a-zA-Z0-9_\.\/\-\+\:\@ ]/) {
 		die_error(undef, "Invalid search parameter");
 	}
+	if (length($searchtext) < 2) {
+		die_error(undef, "At least two characters are required for search parameter");
+	}
 	$searchtext = quotemeta $searchtext;
 }
 
+our $searchtype = $cgi->param('st');
+if (defined $searchtype) {
+	if ($searchtype =~ m/[^a-z]/) {
+		die_error(undef, "Invalid searchtype parameter");
+	}
+}
+
+# now read PATH_INFO and use it as alternative to parameters
+sub evaluate_path_info {
+	return if defined $project;
+	my $path_info = $ENV{"PATH_INFO"};
+	return if !$path_info;
+	$path_info =~ s,^/+,,;
+	return if !$path_info;
+	# find which part of PATH_INFO is project
+	$project = $path_info;
+	$project =~ s,/+$,,;
+	while ($project && !check_head_link("$projectroot/$project")) {
+		$project =~ s,/*[^/]*$,,;
+	}
+	# validate project
+	$project = validate_pathname($project);
+	if (!$project ||
+	    ($export_ok && !-e "$projectroot/$project/$export_ok") ||
+	    ($strict_export && !project_in_list($project))) {
+		undef $project;
+		return;
+	}
+	# do not change any parameters if an action is given using the query string
+	return if $action;
+	$path_info =~ s,^$project/*,,;
+	my ($refname, $pathname) = split(/:/, $path_info, 2);
+	if (defined $pathname) {
+		# we got "project.git/branch:filename" or "project.git/branch:dir/"
+		# we could use git_get_type(branch:pathname), but it needs $git_dir
+		$pathname =~ s,^/+,,;
+		if (!$pathname || substr($pathname, -1) eq "/") {
+			$action  ||= "tree";
+			$pathname =~ s,/$,,;
+		} else {
+			$action  ||= "blob_plain";
+		}
+		$hash_base ||= validate_refname($refname);
+		$file_name ||= validate_pathname($pathname);
+	} elsif (defined $refname) {
+		# we got "project.git/branch"
+		$action ||= "shortlog";
+		$hash   ||= validate_refname($refname);
+	}
+}
+evaluate_path_info();
+
+# path to the current git repository
+our $git_dir;
+$git_dir = "$projectroot/$project" if $project;
+
 # dispatch
 my %actions = (
 	"blame" => \&git_blame2,
@@ -165,22 +433,39 @@ my %actions = (
 	"commitdiff" => \&git_commitdiff,
 	"commitdiff_plain" => \&git_commitdiff_plain,
 	"commit" => \&git_commit,
+	"forks" => \&git_forks,
 	"heads" => \&git_heads,
 	"history" => \&git_history,
 	"log" => \&git_log,
 	"rss" => \&git_rss,
+	"atom" => \&git_atom,
 	"search" => \&git_search,
+	"search_help" => \&git_search_help,
 	"shortlog" => \&git_shortlog,
 	"summary" => \&git_summary,
 	"tag" => \&git_tag,
 	"tags" => \&git_tags,
 	"tree" => \&git_tree,
+	"snapshot" => \&git_snapshot,
+	"object" => \&git_object,
+	# those below don't need $project
+	"opml" => \&git_opml,
+	"project_list" => \&git_project_list,
+	"project_index" => \&git_project_index,
 );
 
-$action = 'summary' if (!defined($action));
+if (defined $project) {
+	$action ||= 'summary';
+} else {
+	$action ||= 'project_list';
+}
 if (!defined($actions{$action})) {
 	die_error(undef, "Unknown action");
 }
+if ($action !~ m/^(opml|project_list|project_index)$/ &&
+    !$project) {
+	die_error(undef, "Project needed");
+}
 $actions{$action}->();
 exit;
 
@@ -188,24 +473,52 @@ exit;
 ## action links
 
 sub href(%) {
-	my %mapping = (
-		action => "a",
+	my %params = @_;
+	# default is to use -absolute url() i.e. $my_uri
+	my $href = $params{-full} ? $my_url : $my_uri;
+
+	# XXX: Warning: If you touch this, check the search form for updating,
+	# too.
+
+	my @mapping = (
 		project => "p",
+		action => "a",
 		file_name => "f",
+		file_parent => "fp",
 		hash => "h",
 		hash_parent => "hp",
 		hash_base => "hb",
+		hash_parent_base => "hpb",
 		page => "pg",
+		order => "o",
 		searchtext => "s",
+		searchtype => "st",
 	);
+	my %mapping = @mapping;
 
-	my %params = @_;
-	$params{"project"} ||= $project;
+	$params{'project'} = $project unless exists $params{'project'};
+
+	my ($use_pathinfo) = gitweb_check_feature('pathinfo');
+	if ($use_pathinfo) {
+		# use PATH_INFO for project name
+		$href .= "/$params{'project'}" if defined $params{'project'};
+		delete $params{'project'};
+
+		# Summary just uses the project path URL
+		if (defined $params{'action'} && $params{'action'} eq 'summary') {
+			delete $params{'action'};
+		}
+	}
 
-	my $href = "$my_uri?";
-	$href .= esc_param( join(";",
-		map { "$mapping{$_}=$params{$_}" } keys %params
-	) );
+	# now encode the parameters explicitly
+	my @result = ();
+	for (my $i = 0; $i < @mapping; $i += 2) {
+		my ($name, $symbol) = ($mapping[$i], $mapping[$i+1]);
+		if (defined $params{$name}) {
+			push @result, $symbol . "=" . esc_param($params{$name});
+		}
+	}
+	$href .= "?" . join(';', @result) if scalar @result;
 
 	return $href;
 }
@@ -214,25 +527,58 @@ sub href(%) {
 ## ======================================================================
 ## validation, quoting/unquoting and escaping
 
-sub validate_input {
-	my $input = shift;
+sub validate_pathname {
+	my $input = shift || return undef;
 
-	if ($input =~ m/^[0-9a-fA-F]{40}$/) {
-		return $input;
+	# no '.' or '..' as elements of path, i.e. no '.' nor '..'
+	# at the beginning, at the end, and between slashes.
+	# also this catches doubled slashes
+	if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
+		return undef;
 	}
-	if ($input =~ m/(^|\/)(|\.|\.\.)($|\/)/) {
+	# no null characters
+	if ($input =~ m!\0!) {
 		return undef;
 	}
-	if ($input =~ m/[^a-zA-Z0-9_\x80-\xff\ \t\.\/\-\+\#\~\%]/) {
+	return $input;
+}
+
+sub validate_refname {
+	my $input = shift || return undef;
+
+	# textual hashes are O.K.
+	if ($input =~ m/^[0-9a-fA-F]{40}$/) {
+		return $input;
+	}
+	# it must be correct pathname
+	$input = validate_pathname($input)
+		or return undef;
+	# restrictions on ref name according to git-check-ref-format
+	if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
 		return undef;
 	}
 	return $input;
 }
 
+# very thin wrapper for decode("utf8", $str, Encode::FB_DEFAULT);
+sub to_utf8 {
+	my $str = shift;
+	return decode("utf8", $str, Encode::FB_DEFAULT);
+}
+
 # quote unsafe chars, but keep the slash, even when it's not
 # correct, but quoted slashes look too horrible in bookmarks
 sub esc_param {
 	my $str = shift;
+	$str =~ s/([^A-Za-z0-9\-_.~()\/:@])/sprintf("%%%02X", ord($1))/eg;
+	$str =~ s/\+/%2B/g;
+	$str =~ s/ /\+/g;
+	return $str;
+}
+
+# quote unsafe chars in whole URL, so some charactrs cannot be quoted
+sub esc_url {
+	my $str = shift;
 	$str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
 	$str =~ s/\+/%2B/g;
 	$str =~ s/ /\+/g;
@@ -240,20 +586,93 @@ sub esc_param {
 }
 
 # replace invalid utf8 character with SUBSTITUTION sequence
-sub esc_html {
+sub esc_html ($;%) {
 	my $str = shift;
-	$str = decode("utf8", $str, Encode::FB_DEFAULT);
+	my %opts = @_;
+
+	$str = to_utf8($str);
 	$str = escapeHTML($str);
-	$str =~ s/\014/^L/g; # escape FORM FEED (FF) character (e.g. in COPYING file)
+	if ($opts{'-nbsp'}) {
+		$str =~ s/ /&nbsp;/g;
+	}
+	$str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
 	return $str;
 }
 
+# quote control characters and escape filename to HTML
+sub esc_path {
+	my $str = shift;
+	my %opts = @_;
+
+	$str = to_utf8($str);
+	$str = escapeHTML($str);
+	if ($opts{'-nbsp'}) {
+		$str =~ s/ /&nbsp;/g;
+	}
+	$str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
+	return $str;
+}
+
+# Make control characters "printable", using character escape codes (CEC)
+sub quot_cec {
+	my $cntrl = shift;
+	my %es = ( # character escape codes, aka escape sequences
+		   "\t" => '\t',   # tab            (HT)
+		   "\n" => '\n',   # line feed      (LF)
+		   "\r" => '\r',   # carrige return (CR)
+		   "\f" => '\f',   # form feed      (FF)
+		   "\b" => '\b',   # backspace      (BS)
+		   "\a" => '\a',   # alarm (bell)   (BEL)
+		   "\e" => '\e',   # escape         (ESC)
+		   "\013" => '\v', # vertical tab   (VT)
+		   "\000" => '\0', # nul character  (NUL)
+		   );
+	my $chr = ( (exists $es{$cntrl})
+		    ? $es{$cntrl}
+		    : sprintf('\%03o', ord($cntrl)) );
+	return "<span class=\"cntrl\">$chr</span>";
+}
+
+# Alternatively use unicode control pictures codepoints,
+# Unicode "printable representation" (PR)
+sub quot_upr {
+	my $cntrl = shift;
+	my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
+	return "<span class=\"cntrl\">$chr</span>";
+}
+
 # git may return quoted and escaped filenames
 sub unquote {
 	my $str = shift;
+
+	sub unq {
+		my $seq = shift;
+		my %es = ( # character escape codes, aka escape sequences
+			't' => "\t",   # tab            (HT, TAB)
+			'n' => "\n",   # newline        (NL)
+			'r' => "\r",   # return         (CR)
+			'f' => "\f",   # form feed      (FF)
+			'b' => "\b",   # backspace      (BS)
+			'a' => "\a",   # alarm (bell)   (BEL)
+			'e' => "\e",   # escape         (ESC)
+			'v' => "\013", # vertical tab   (VT)
+		);
+
+		if ($seq =~ m/^[0-7]{1,3}$/) {
+			# octal char sequence
+			return chr(oct($seq));
+		} elsif (exists $es{$seq}) {
+			# C escape sequence, aka character escape code
+			return $es{$seq}
+		}
+		# quoted ordinary character
+		return $seq;
+	}
+
 	if ($str =~ m/^"(.*)"$/) {
+		# needs unquoting
 		$str = $1;
-		$str =~ s/\\([0-7]{1,3})/chr(oct($1))/eg;
+		$str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
 	}
 	return $str;
 }
@@ -272,6 +691,12 @@ sub untabify {
 	return $line;
 }
 
+sub project_in_list {
+	my $project = shift;
+	my @list = git_get_projects_list();
+	return @list && scalar(grep { $_->{'path'} eq $project } @list);
+}
+
 ## ----------------------------------------------------------------------
 ## HTML aware string manipulation
 
@@ -362,7 +787,13 @@ sub mode_str {
 
 # convert file mode in octal to file type string
 sub file_type {
-	my $mode = oct shift;
+	my $mode = shift;
+
+	if ($mode !~ m/^[0-7]+$/) {
+		return $mode;
+	} else {
+		$mode = oct $mode;
+	}
 
 	if (S_ISDIR($mode & S_IFMT)) {
 		return "directory";
@@ -375,22 +806,47 @@ sub file_type {
 	}
 }
 
+# convert file mode in octal to file type description string
+sub file_type_long {
+	my $mode = shift;
+
+	if ($mode !~ m/^[0-7]+$/) {
+		return $mode;
+	} else {
+		$mode = oct $mode;
+	}
+
+	if (S_ISDIR($mode & S_IFMT)) {
+		return "directory";
+	} elsif (S_ISLNK($mode)) {
+		return "symlink";
+	} elsif (S_ISREG($mode)) {
+		if ($mode & S_IXUSR) {
+			return "executable";
+		} else {
+			return "file";
+		};
+	} else {
+		return "unknown";
+	}
+}
+
+
 ## ----------------------------------------------------------------------
 ## functions returning short HTML fragments, or transforming HTML fragments
 ## which don't beling to other sections
 
-# format line of commit message or tag comment
+# format line of commit message.
 sub format_log_line_html {
 	my $line = shift;
 
-	$line = esc_html($line);
-	$line =~ s/ /&nbsp;/g;
-	if ($line =~ m/([0-9a-fA-F]{40})/) {
+	$line = esc_html($line, -nbsp=>1);
+	if ($line =~ m/([0-9a-fA-F]{8,40})/) {
 		my $hash_text = $1;
-		if (git_get_type($hash_text) eq "commit") {
-			my $link = $cgi->a({-class => "text", -href => href(action=>"commit", hash=>$hash_text)}, $hash_text);
-			$line =~ s/$hash_text/$link/;
-		}
+		my $link =
+			$cgi->a({-href => href(action=>"object", hash=>$hash_text),
+			        -class => "text"}, $hash_text);
+		$line =~ s/$hash_text/$link/;
 	}
 	return $line;
 }
@@ -412,7 +868,8 @@ sub format_ref_marker {
 				$name = $ref;
 			}
 
-			$markers .= " <span class=\"$type\">" . esc_html($name) . "</span>";
+			$markers .= " <span class=\"$type\" title=\"$ref\">" .
+			            esc_html($name) . "</span>";
 		}
 	}
 
@@ -429,33 +886,84 @@ sub format_subject_html {
 	$extra = '' unless defined($extra);
 
 	if (length($short) < length($long)) {
-		return $cgi->a({-href => $href, -class => "list",
-		                -title => $long},
+		return $cgi->a({-href => $href, -class => "list subject",
+		                -title => to_utf8($long)},
 		       esc_html($short) . $extra);
 	} else {
-		return $cgi->a({-href => $href, -class => "list"},
+		return $cgi->a({-href => $href, -class => "list subject"},
 		       esc_html($long)  . $extra);
 	}
 }
 
+# format patch (diff) line (rather not to be used for diff headers)
+sub format_diff_line {
+	my $line = shift;
+	my ($from, $to) = @_;
+	my $char = substr($line, 0, 1);
+	my $diff_class = "";
+
+	chomp $line;
+
+	if ($char eq '+') {
+		$diff_class = " add";
+	} elsif ($char eq "-") {
+		$diff_class = " rem";
+	} elsif ($char eq "@") {
+		$diff_class = " chunk_header";
+	} elsif ($char eq "\\") {
+		$diff_class = " incomplete";
+	}
+	$line = untabify($line);
+	if ($from && $to && $line =~ m/^\@{2} /) {
+		my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
+			$line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
+
+		$from_lines = 0 unless defined $from_lines;
+		$to_lines   = 0 unless defined $to_lines;
+
+		if ($from->{'href'}) {
+			$from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
+			                     -class=>"list"}, $from_text);
+		}
+		if ($to->{'href'}) {
+			$to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
+			                     -class=>"list"}, $to_text);
+		}
+		$line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
+		        "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
+		return "<div class=\"diff$diff_class\">$line</div>\n";
+	}
+	return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
+}
+
 ## ----------------------------------------------------------------------
 ## git utility subroutines, invoking git commands
 
+# returns path to the core git executable and the --git-dir parameter as list
+sub git_cmd {
+	return $GIT, '--git-dir='.$git_dir;
+}
+
+# returns path to the core git executable and the --git-dir parameter as string
+sub git_cmd_str {
+	return join(' ', git_cmd());
+}
+
 # get HEAD ref of given project as hash
 sub git_get_head_hash {
 	my $project = shift;
-	my $oENV = $ENV{'GIT_DIR'};
+	my $o_git_dir = $git_dir;
 	my $retval = undef;
-	$ENV{'GIT_DIR'} = "$projectroot/$project";
-	if (open my $fd, "-|", $GIT, "rev-parse", "--verify", "HEAD") {
+	$git_dir = "$projectroot/$project";
+	if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
 		my $head = <$fd>;
 		close $fd;
 		if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
 			$retval = $1;
 		}
 	}
-	if (defined $oENV) {
-		$ENV{'GIT_DIR'} = $oENV;
+	if (defined $o_git_dir) {
+		$git_dir = $o_git_dir;
 	}
 	return $retval;
 }
@@ -464,7 +972,7 @@ sub git_get_head_hash {
 sub git_get_type {
 	my $hash = shift;
 
-	open my $fd, "-|", $GIT, "cat-file", '-t', $hash or return;
+	open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
 	my $type = <$fd>;
 	close $fd or return;
 	chomp $type;
@@ -472,57 +980,46 @@ sub git_get_type {
 }
 
 sub git_get_project_config {
-	my $key = shift;
+	my ($key, $type) = @_;
 
 	return unless ($key);
 	$key =~ s/^gitweb\.//;
 	return if ($key =~ m/\W/);
 
-	my $val = qx($GIT repo-config --get gitweb.$key);
+	my @x = (git_cmd(), 'repo-config');
+	if (defined $type) { push @x, $type; }
+	push @x, "--get";
+	push @x, "gitweb.$key";
+	my $val = qx(@x);
+	chomp $val;
 	return ($val);
 }
 
-sub git_get_project_config_bool {
-	my $val = git_get_project_config (@_);
-	if ($val and $val =~ m/true|yes|on/) {
-		return (1);
-	}
-	return; # implicit false
-}
-
 # get hash of given path at given ref
 sub git_get_hash_by_path {
 	my $base = shift;
 	my $path = shift || return undef;
+	my $type = shift;
 
-	my $tree = $base;
+	$path =~ s,/+$,,;
 
-	open my $fd, "-|", $GIT, "ls-tree", $base, "--", $path
+	open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
 		or die_error(undef, "Open git-ls-tree failed");
 	my $line = <$fd>;
 	close $fd or return undef;
 
 	#'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa	panic.c'
-	$line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/;
+	$line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
+	if (defined $type && $type ne $2) {
+		# type doesn't match
+		return undef;
+	}
 	return $3;
 }
 
 ## ......................................................................
 ## git utility functions, directly accessing git repository
 
-# assumes that PATH is not symref
-sub git_get_hash_by_ref {
-	my $path = shift;
-
-	open my $fd, "$projectroot/$path" or return undef;
-	my $head = <$fd>;
-	close $fd;
-	chomp $head;
-	if ($head =~ m/^[0-9a-fA-F]{40}$/) {
-		return $head;
-	}
-}
-
 sub git_get_project_description {
 	my $path = shift;
 
@@ -536,7 +1033,7 @@ sub git_get_project_description {
 sub git_get_project_url_list {
 	my $path = shift;
 
-	open my $fd, "$projectroot/$path/cloneurl" or return undef;
+	open my $fd, "$projectroot/$path/cloneurl" or return;
 	my @git_project_url_list = map { chomp; $_ } <$fd>;
 	close $fd;
 
@@ -544,27 +1041,47 @@ sub git_get_project_url_list {
 }
 
 sub git_get_projects_list {
+	my ($filter) = @_;
 	my @list;
 
+	$filter ||= '';
+	$filter =~ s/\.git$//;
+
 	if (-d $projects_list) {
 		# search in directory
-		my $dir = $projects_list;
-		opendir my ($dh), $dir or return undef;
-		while (my $dir = readdir($dh)) {
-			if (-e "$projectroot/$dir/HEAD") {
-				my $pr = {
-					path => $dir,
-				};
-				push @list, $pr
-			}
-		}
-		closedir($dh);
+		my $dir = $projects_list . ($filter ? "/$filter" : '');
+		# remove the trailing "/"
+		$dir =~ s!/+$!!;
+		my $pfxlen = length("$dir");
+
+		my ($check_forks) = gitweb_check_feature('forks');
+
+		File::Find::find({
+			follow_fast => 1, # follow symbolic links
+			dangling_symlinks => 0, # ignore dangling symlinks, silently
+			wanted => sub {
+				# skip project-list toplevel, if we get it.
+				return if (m!^[/.]$!);
+				# only directories can be git repositories
+				return unless (-d $_);
+
+				my $subdir = substr($File::Find::name, $pfxlen + 1);
+				# we check related file in $projectroot
+				if ($check_forks and $subdir =~ m#/.#) {
+					$File::Find::prune = 1;
+				} elsif (check_export_ok("$projectroot/$filter/$subdir")) {
+					push @list, { path => ($filter ? "$filter/" : '') . $subdir };
+					$File::Find::prune = 1;
+				}
+			},
+		}, "$dir");
+
 	} elsif (-f $projects_list) {
 		# read from file(url-encoded):
 		# 'git%2Fgit.git Linus+Torvalds'
 		# 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
 		# 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
-		open my ($fd), $projects_list or return undef;
+		open my ($fd), $projects_list or return;
 		while (my $line = <$fd>) {
 			chomp $line;
 			my ($path, $owner) = split ' ', $line;
@@ -573,10 +1090,21 @@ sub git_get_projects_list {
 			if (!defined $path) {
 				next;
 			}
-			if (-e "$projectroot/$path/HEAD") {
+			if ($filter ne '') {
+				# looking for forks;
+				my $pfx = substr($path, 0, length($filter));
+				if ($pfx ne $filter) {
+					next;
+				}
+				my $sfx = substr($path, length($filter));
+				if ($sfx !~ /^\/.*\.git$/) {
+					next;
+				}
+			}
+			if (check_export_ok("$projectroot/$path")) {
 				my $pr = {
 					path => $path,
-					owner => decode("utf8", $owner, Encode::FB_DEFAULT),
+					owner => to_utf8($owner),
 				};
 				push @list, $pr
 			}
@@ -605,7 +1133,7 @@ sub git_get_project_owner {
 			$pr = unescape($pr);
 			$ow = unescape($ow);
 			if ($pr eq $project) {
-				$owner = decode("utf8", $ow, Encode::FB_DEFAULT);
+				$owner = to_utf8($ow);
 				last;
 			}
 		}
@@ -618,23 +1146,37 @@ sub git_get_project_owner {
 	return $owner;
 }
 
+sub git_get_last_activity {
+	my ($path) = @_;
+	my $fd;
+
+	$git_dir = "$projectroot/$path";
+	open($fd, "-|", git_cmd(), 'for-each-ref',
+	     '--format=%(committer)',
+	     '--sort=-committerdate',
+	     '--count=1',
+	     'refs/heads') or return;
+	my $most_recent = <$fd>;
+	close $fd or return;
+	if ($most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
+		my $timestamp = $1;
+		my $age = time - $timestamp;
+		return ($age, age_string($age));
+	}
+}
+
 sub git_get_references {
 	my $type = shift || "";
 	my %refs;
-	my $fd;
-	# 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c	refs/tags/v2.6.11
-	# c39ae07f393806ccf406ef966e9a15afc43cc36a	refs/tags/v2.6.11^{}
-	if (-f "$projectroot/$project/info/refs") {
-		open $fd, "$projectroot/$project/info/refs"
-			or return;
-	} else {
-		open $fd, "-|", $GIT, "ls-remote", "."
-			or return;
-	}
+	# 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
+	# c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
+	open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
+		($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
+		or return;
 
 	while (my $line = <$fd>) {
 		chomp $line;
-		if ($line =~ m/^([0-9a-fA-F]{40})\trefs\/($type\/?[^\^]+)/) {
+		if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type/?[^^]+)!) {
 			if (defined $refs{$1}) {
 				push @{$refs{$1}}, $2;
 			} else {
@@ -646,6 +1188,22 @@ sub git_get_references {
 	return \%refs;
 }
 
+sub git_get_rev_name_tags {
+	my $hash = shift || return undef;
+
+	open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
+		or return;
+	my $name_rev = <$fd>;
+	close $fd;
+
+	if ($name_rev =~ m|^$hash tags/(.*)$|) {
+		return $1;
+	} else {
+		# catches also '$hash undefined' output
+		return undef;
+	}
+}
+
 ## ----------------------------------------------------------------------
 ## parse to hash functions
 
@@ -662,8 +1220,12 @@ sub parse_date {
 	$date{'mday'} = $mday;
 	$date{'day'} = $days[$wday];
 	$date{'month'} = $months[$mon];
-	$date{'rfc2822'} = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000", $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
-	$date{'mday-time'} = sprintf "%d %s %02d:%02d", $mday, $months[$mon], $hour ,$min;
+	$date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
+	                     $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
+	$date{'mday-time'} = sprintf "%d %s %02d:%02d",
+	                     $mday, $months[$mon], $hour ,$min;
+	$date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
+	                     1900+$year, $mon, $mday, $hour ,$min, $sec;
 
 	$tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
 	my $local = $epoch + ((int $1 + ($2/60)) * 3600);
@@ -671,6 +1233,9 @@ sub parse_date {
 	$date{'hour_local'} = $hour;
 	$date{'minute_local'} = $min;
 	$date{'tz_local'} = $tz;
+	$date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
+	                          1900+$year, $mon+1, $mday,
+	                          $hour, $min, $sec, $tz);
 	return %date;
 }
 
@@ -679,7 +1244,7 @@ sub parse_tag {
 	my %tag;
 	my @comment;
 
-	open my $fd, "-|", $GIT, "cat-file", "tag", $tag_id or return;
+	open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
 	$tag{'id'} = $tag_id;
 	while (my $line = <$fd>) {
 		chomp $line;
@@ -709,40 +1274,31 @@ sub parse_tag {
 	return %tag
 }
 
-sub parse_commit {
-	my $commit_id = shift;
-	my $commit_text = shift;
-
-	my @commit_lines;
+sub parse_commit_text {
+	my ($commit_text, $withparents) = @_;
+	my @commit_lines = split '\n', $commit_text;
 	my %co;
 
-	if (defined $commit_text) {
-		@commit_lines = @$commit_text;
-	} else {
-		$/ = "\0";
-		open my $fd, "-|", $GIT, "rev-list", "--header", "--parents", "--max-count=1", $commit_id or return;
-		@commit_lines = split '\n', <$fd>;
-		close $fd or return;
-		$/ = "\n";
-		pop @commit_lines;
-	}
+	pop @commit_lines; # Remove '\0'
+
 	my $header = shift @commit_lines;
 	if (!($header =~ m/^[0-9a-fA-F]{40}/)) {
 		return;
 	}
 	($co{'id'}, my @parents) = split ' ', $header;
-	$co{'parents'} = \@parents;
-	$co{'parent'} = $parents[0];
 	while (my $line = shift @commit_lines) {
 		last if $line eq "\n";
 		if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
 			$co{'tree'} = $1;
+		} elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
+			push @parents, $1;
 		} elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
 			$co{'author'} = $1;
 			$co{'author_epoch'} = $2;
 			$co{'author_tz'} = $3;
-			if ($co{'author'} =~ m/^([^<]+) </) {
-				$co{'author_name'} = $1;
+			if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
+				$co{'author_name'}  = $1;
+				$co{'author_email'} = $2;
 			} else {
 				$co{'author_name'} = $co{'author'};
 			}
@@ -751,12 +1307,19 @@ sub parse_commit {
 			$co{'committer_epoch'} = $2;
 			$co{'committer_tz'} = $3;
 			$co{'committer_name'} = $co{'committer'};
-			$co{'committer_name'} =~ s/ <.*//;
+			if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
+				$co{'committer_name'}  = $1;
+				$co{'committer_email'} = $2;
+			} else {
+				$co{'committer_name'} = $co{'committer'};
+			}
 		}
 	}
 	if (!defined $co{'tree'}) {
 		return;
 	};
+	$co{'parents'} = \@parents;
+	$co{'parent'} = $parents[0];
 
 	foreach my $title (@commit_lines) {
 		$title =~ s/^    //;
@@ -783,6 +1346,9 @@ sub parse_commit {
 			last;
 		}
 	}
+	if ($co{'title'} eq "") {
+		$co{'title'} = $co{'title_short'} = '(no commit message)';
+	}
 	# remove added spaces
 	foreach my $line (@commit_lines) {
 		$line =~ s/^    //;
@@ -803,6 +1369,52 @@ sub parse_commit {
 	return %co;
 }
 
+sub parse_commit {
+	my ($commit_id) = @_;
+	my %co;
+
+	local $/ = "\0";
+
+	open my $fd, "-|", git_cmd(), "rev-list",
+		"--parents",
+		"--header",
+		"--max-count=1",
+		$commit_id,
+		"--",
+		or die_error(undef, "Open git-rev-list failed");
+	%co = parse_commit_text(<$fd>, 1);
+	close $fd;
+
+	return %co;
+}
+
+sub parse_commits {
+	my ($commit_id, $maxcount, $skip, $arg, $filename) = @_;
+	my @cos;
+
+	$maxcount ||= 1;
+	$skip ||= 0;
+
+	local $/ = "\0";
+
+	open my $fd, "-|", git_cmd(), "rev-list",
+		"--header",
+		($arg ? ($arg) : ()),
+		("--max-count=" . $maxcount),
+		("--skip=" . $skip),
+		$commit_id,
+		"--",
+		($filename ? ($filename) : ())
+		or die_error(undef, "Open git-rev-list failed");
+	while (my $line = <$fd>) {
+		my %co = parse_commit_text($line);
+		push @cos, \%co;
+	}
+	close $fd;
+
+	return wantarray ? @cos : \@cos;
+}
+
 # parse ref from ref_file, given by ref_id, with given type
 sub parse_ref {
 	my $ref_file = shift;
@@ -846,32 +1458,140 @@ sub parse_ref {
 	return %ref_item;
 }
 
+# parse line of git-diff-tree "raw" output
+sub parse_difftree_raw_line {
+	my $line = shift;
+	my %res;
+
+	# ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M	ls-files.c'
+	# ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M	rev-tree.c'
+	if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
+		$res{'from_mode'} = $1;
+		$res{'to_mode'} = $2;
+		$res{'from_id'} = $3;
+		$res{'to_id'} = $4;
+		$res{'status'} = $5;
+		$res{'similarity'} = $6;
+		if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
+			($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
+		} else {
+			$res{'file'} = unquote($7);
+		}
+	}
+	# 'c512b523472485aef4fff9e57b229d9d243c967f'
+	elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
+		$res{'commit'} = $1;
+	}
+
+	return wantarray ? %res : \%res;
+}
+
+# parse line of git-ls-tree output
+sub parse_ls_tree_line ($;%) {
+	my $line = shift;
+	my %opts = @_;
+	my %res;
+
+	#'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa	panic.c'
+	$line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
+
+	$res{'mode'} = $1;
+	$res{'type'} = $2;
+	$res{'hash'} = $3;
+	if ($opts{'-z'}) {
+		$res{'name'} = $4;
+	} else {
+		$res{'name'} = unquote($4);
+	}
+
+	return wantarray ? %res : \%res;
+}
+
 ## ......................................................................
 ## parse to array of hashes functions
 
-sub git_get_refs_list {
-	my $ref_dir = shift;
-	my @reflist;
+sub git_get_heads_list {
+	my $limit = shift;
+	my @headslist;
 
-	my @refs;
-	my $pfxlen = length("$projectroot/$project/$ref_dir");
-	File::Find::find(sub {
-		return if (/^\./);
-		if (-f $_) {
-			push @refs, substr($File::Find::name, $pfxlen + 1);
+	open my $fd, '-|', git_cmd(), 'for-each-ref',
+		($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
+		'--format=%(objectname) %(refname) %(subject)%00%(committer)',
+		'refs/heads'
+		or return;
+	while (my $line = <$fd>) {
+		my %ref_item;
+
+		chomp $line;
+		my ($refinfo, $committerinfo) = split(/\0/, $line);
+		my ($hash, $name, $title) = split(' ', $refinfo, 3);
+		my ($committer, $epoch, $tz) =
+			($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
+		$name =~ s!^refs/heads/!!;
+
+		$ref_item{'name'}  = $name;
+		$ref_item{'id'}    = $hash;
+		$ref_item{'title'} = $title || '(no commit message)';
+		$ref_item{'epoch'} = $epoch;
+		if ($epoch) {
+			$ref_item{'age'} = age_string(time - $ref_item{'epoch'});
+		} else {
+			$ref_item{'age'} = "unknown";
 		}
-	}, "$projectroot/$project/$ref_dir");
 
-	foreach my $ref_file (@refs) {
-		my $ref_id = git_get_hash_by_ref("$project/$ref_dir/$ref_file");
-		my $type = git_get_type($ref_id) || next;
-		my %ref_item = parse_ref($ref_file, $ref_id, $type);
+		push @headslist, \%ref_item;
+	}
+	close $fd;
+
+	return wantarray ? @headslist : \@headslist;
+}
+
+sub git_get_tags_list {
+	my $limit = shift;
+	my @tagslist;
 
-		push @reflist, \%ref_item;
+	open my $fd, '-|', git_cmd(), 'for-each-ref',
+		($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
+		'--format=%(objectname) %(objecttype) %(refname) '.
+		'%(*objectname) %(*objecttype) %(subject)%00%(creator)',
+		'refs/tags'
+		or return;
+	while (my $line = <$fd>) {
+		my %ref_item;
+
+		chomp $line;
+		my ($refinfo, $creatorinfo) = split(/\0/, $line);
+		my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
+		my ($creator, $epoch, $tz) =
+			($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
+		$name =~ s!^refs/tags/!!;
+
+		$ref_item{'type'} = $type;
+		$ref_item{'id'} = $id;
+		$ref_item{'name'} = $name;
+		if ($type eq "tag") {
+			$ref_item{'subject'} = $title;
+			$ref_item{'reftype'} = $reftype;
+			$ref_item{'refid'}   = $refid;
+		} else {
+			$ref_item{'reftype'} = $type;
+			$ref_item{'refid'}   = $id;
+		}
+
+		if ($type eq "tag" || $type eq "commit") {
+			$ref_item{'epoch'} = $epoch;
+			if ($epoch) {
+				$ref_item{'age'} = age_string(time - $ref_item{'epoch'});
+			} else {
+				$ref_item{'age'} = "unknown";
+			}
+		}
+
+		push @tagslist, \%ref_item;
 	}
-	# sort refs by age
-	@reflist = sort {$b->{'epoch'} <=> $a->{'epoch'}} @reflist;
-	return \@reflist;
+	close $fd;
+
+	return wantarray ? @tagslist : \@tagslist;
 }
 
 ## ----------------------------------------------------------------------
@@ -887,7 +1607,7 @@ sub get_file_owner {
 	}
 	my $owner = $gcos;
 	$owner =~ s/[,;].*$//;
-	return decode("utf8", $owner, Encode::FB_DEFAULT);
+	return to_utf8($owner);
 }
 
 ## ......................................................................
@@ -912,7 +1632,7 @@ sub mimetype_guess_file {
 	}
 	close(MIME);
 
-	$filename =~ /\.(.*?)$/;
+	$filename =~ /\.([^.]*)$/;
 	return $mimemap{$1};
 }
 
@@ -968,13 +1688,13 @@ sub git_header_html {
 	my $status = shift || "200 OK";
 	my $expires = shift;
 
-	my $title = "$site_name git";
+	my $title = "$site_name";
 	if (defined $project) {
 		$title .= " - $project";
 		if (defined $action) {
 			$title .= "/$action";
 			if (defined $file_name) {
-				$title .= " - $file_name";
+				$title .= " - " . esc_path($file_name);
 				if ($action eq "tree" && $file_name !~ m|/$|) {
 					$title .= "/";
 				}
@@ -986,12 +1706,16 @@ sub git_header_html {
 	# 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
 	# we have to do this because MSIE sometimes globs '*/*', pretending to
 	# support xhtml+xml but choking when it gets what it asked for.
-	if (defined $cgi->http('HTTP_ACCEPT') && $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ && $cgi->Accept('application/xhtml+xml') != 0) {
+	if (defined $cgi->http('HTTP_ACCEPT') &&
+	    $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
+	    $cgi->Accept('application/xhtml+xml') != 0) {
 		$content_type = 'application/xhtml+xml';
 	} else {
 		$content_type = 'text/html';
 	}
-	print $cgi->header(-type=>$content_type, -charset => 'utf-8', -status=> $status, -expires => $expires);
+	print $cgi->header(-type=>$content_type, -charset => 'utf-8',
+	                   -status=> $status, -expires => $expires);
+	my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
 	print <<EOF;
 <?xml version="1.0" encoding="utf-8"?>
 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
@@ -1000,30 +1724,62 @@ sub git_header_html {
 <!-- git core binaries version $git_version -->
 <head>
 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
-<meta name="generator" content="gitweb/$version git/$git_version"/>
+<meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
 <meta name="robots" content="index, nofollow"/>
 <title>$title</title>
-<link rel="stylesheet" type="text/css" href="$stylesheet"/>
 EOF
+# print out each stylesheet that exist
+	if (defined $stylesheet) {
+#provides backwards capability for those people who define style sheet in a config file
+		print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
+	} else {
+		foreach my $stylesheet (@stylesheets) {
+			next unless $stylesheet;
+			print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
+		}
+	}
 	if (defined $project) {
-		printf('<link rel="alternate" title="%s log" '.
-		       'href="%s" type="application/rss+xml"/>'."\n",
+		printf('<link rel="alternate" title="%s log RSS feed" '.
+		       'href="%s" type="application/rss+xml" />'."\n",
 		       esc_param($project), href(action=>"rss"));
+		printf('<link rel="alternate" title="%s log Atom feed" '.
+		       'href="%s" type="application/atom+xml" />'."\n",
+		       esc_param($project), href(action=>"atom"));
+	} else {
+		printf('<link rel="alternate" title="%s projects list" '.
+		       'href="%s" type="text/plain; charset=utf-8"/>'."\n",
+		       $site_name, href(project=>undef, action=>"project_index"));
+		printf('<link rel="alternate" title="%s projects feeds" '.
+		       'href="%s" type="text/x-opml"/>'."\n",
+		       $site_name, href(project=>undef, action=>"opml"));
+	}
+	if (defined $favicon) {
+		print qq(<link rel="shortcut icon" href="$favicon" type="image/png"/>\n);
 	}
 
 	print "</head>\n" .
-	      "<body>\n" .
-	      "<div class=\"page_header\">\n" .
-	      "<a href=\"http://www.kernel.org/pub/software/scm/git/docs/\" title=\"git documentation\">" .
-	      "<img src=\"$logo\" width=\"72\" height=\"27\" alt=\"git\" style=\"float:right; border-width:0px;\"/>" .
-	      "</a>\n";
-	print $cgi->a({-href => esc_param($home_link)}, $home_link_str) . " / ";
+	      "<body>\n";
+
+	if (-f $site_header) {
+		open (my $fd, $site_header);
+		print <$fd>;
+		close $fd;
+	}
+
+	print "<div class=\"page_header\">\n" .
+	      $cgi->a({-href => esc_url($logo_url),
+	               -title => $logo_label},
+	              qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
+	print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
 	if (defined $project) {
 		print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
 		if (defined $action) {
 			print " / $action";
 		}
 		print "\n";
+	}
+	my ($have_search) = gitweb_check_feature('search');
+	if ((defined $project) && ($have_search)) {
 		if (!defined $searchtext) {
 			$searchtext = "";
 		}
@@ -1037,11 +1793,16 @@ EOF
 		}
 		$cgi->param("a", "search");
 		$cgi->param("h", $search_hash);
+		$cgi->param("p", $project);
 		print $cgi->startform(-method => "get", -action => $my_uri) .
 		      "<div class=\"search\">\n" .
 		      $cgi->hidden(-name => "p") . "\n" .
 		      $cgi->hidden(-name => "a") . "\n" .
 		      $cgi->hidden(-name => "h") . "\n" .
+		      $cgi->popup_menu(-name => 'st', -default => 'commit',
+				       -values => ['commit', 'author', 'committer', 'pickaxe']) .
+		      $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
+		      " search:\n",
 		      $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
 		      "</div>" .
 		      $cgi->end_form() . "\n";
@@ -1056,12 +1817,25 @@ sub git_footer_html {
 		if (defined $descr) {
 			print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
 		}
-		print $cgi->a({-href => href(action=>"rss"), -class => "rss_logo"}, "RSS") . "\n";
+		print $cgi->a({-href => href(action=>"rss"),
+		              -class => "rss_logo"}, "RSS") . " ";
+		print $cgi->a({-href => href(action=>"atom"),
+		              -class => "rss_logo"}, "Atom") . "\n";
 	} else {
-		print $cgi->a({-href => "$my_uri?" . esc_param("a=opml"), -class => "rss_logo"}, "OPML") . "\n";
+		print $cgi->a({-href => href(project=>undef, action=>"opml"),
+		              -class => "rss_logo"}, "OPML") . " ";
+		print $cgi->a({-href => href(project=>undef, action=>"project_index"),
+		              -class => "rss_logo"}, "TXT") . "\n";
 	}
-	print "</div>\n" .
-	      "</body>\n" .
+	print "</div>\n" ;
+
+	if (-f $site_footer) {
+		open (my $fd, $site_footer);
+		print <$fd>;
+		close $fd;
+	}
+
+	print "</body>\n" .
 	      "</html>";
 }
 
@@ -1070,11 +1844,13 @@ sub die_error {
 	my $error = shift || "Malformed query, file missing or permission denied";
 
 	git_header_html($status);
-	print "<div class=\"page_body\">\n" .
-	      "<br/><br/>\n" .
-	      "$status - $error\n" .
-	      "<br/>\n" .
-	      "</div>\n";
+	print <<EOF;
+<div class="page_body">
+<br /><br />
+$status - $error
+<br />
+</div>
+EOF
 	git_footer_html();
 	exit;
 }
@@ -1161,17 +1937,244 @@ sub git_print_header_div {
 	      "\n</div>\n";
 }
 
+#sub git_print_authorship (\%) {
+sub git_print_authorship {
+	my $co = shift;
+
+	my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
+	print "<div class=\"author_date\">" .
+	      esc_html($co->{'author_name'}) .
+	      " [$ad{'rfc2822'}";
+	if ($ad{'hour_local'} < 6) {
+		printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
+		       $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
+	} else {
+		printf(" (%02d:%02d %s)",
+		       $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
+	}
+	print "]</div>\n";
+}
+
 sub git_print_page_path {
 	my $name = shift;
 	my $type = shift;
+	my $hb = shift;
+
+
+	print "<div class=\"page_path\">";
+	print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
+	              -title => 'tree root'}, "[$project]");
+	print " / ";
+	if (defined $name) {
+		my @dirname = split '/', $name;
+		my $basename = pop @dirname;
+		my $fullname = '';
+
+		foreach my $dir (@dirname) {
+			$fullname .= ($fullname ? '/' : '') . $dir;
+			print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
+			                             hash_base=>$hb),
+			              -title => esc_html($fullname)}, esc_path($dir));
+			print " / ";
+		}
+		if (defined $type && $type eq 'blob') {
+			print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
+			                             hash_base=>$hb),
+			              -title => esc_html($name)}, esc_path($basename));
+		} elsif (defined $type && $type eq 'tree') {
+			print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
+			                             hash_base=>$hb),
+			              -title => esc_html($name)}, esc_path($basename));
+			print " / ";
+		} else {
+			print esc_path($basename);
+		}
+	}
+	print "<br/></div>\n";
+}
+
+# sub git_print_log (\@;%) {
+sub git_print_log ($;%) {
+	my $log = shift;
+	my %opts = @_;
+
+	if ($opts{'-remove_title'}) {
+		# remove title, i.e. first line of log
+		shift @$log;
+	}
+	# remove leading empty lines
+	while (defined $log->[0] && $log->[0] eq "") {
+		shift @$log;
+	}
+
+	# print log
+	my $signoff = 0;
+	my $empty = 0;
+	foreach my $line (@$log) {
+		if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
+			$signoff = 1;
+			$empty = 0;
+			if (! $opts{'-remove_signoff'}) {
+				print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
+				next;
+			} else {
+				# remove signoff lines
+				next;
+			}
+		} else {
+			$signoff = 0;
+		}
+
+		# print only one empty line
+		# do not print empty line after signoff
+		if ($line eq "") {
+			next if ($empty || $signoff);
+			$empty = 1;
+		} else {
+			$empty = 0;
+		}
+
+		print format_log_line_html($line) . "<br/>\n";
+	}
+
+	if ($opts{'-final_empty_line'}) {
+		# end with single empty line
+		print "<br/>\n" unless $empty;
+	}
+}
 
-	if (!defined $name) {
-		print "<div class=\"page_path\"><b>/</b></div>\n";
-	} elsif (defined $type && $type eq 'blob') {
-		print "<div class=\"page_path\"><b>" .
-			$cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name)}, esc_html($name)) . "</b><br/></div>\n";
+# return link target (what link points to)
+sub git_get_link_target {
+	my $hash = shift;
+	my $link_target;
+
+	# read link
+	open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
+		or return;
+	{
+		local $/;
+		$link_target = <$fd>;
+	}
+	close $fd
+		or return;
+
+	return $link_target;
+}
+
+# given link target, and the directory (basedir) the link is in,
+# return target of link relative to top directory (top tree);
+# return undef if it is not possible (including absolute links).
+sub normalize_link_target {
+	my ($link_target, $basedir, $hash_base) = @_;
+
+	# we can normalize symlink target only if $hash_base is provided
+	return unless $hash_base;
+
+	# absolute symlinks (beginning with '/') cannot be normalized
+	return if (substr($link_target, 0, 1) eq '/');
+
+	# normalize link target to path from top (root) tree (dir)
+	my $path;
+	if ($basedir) {
+		$path = $basedir . '/' . $link_target;
 	} else {
-		print "<div class=\"page_path\"><b>" . esc_html($name) . "</b><br/></div>\n";
+		# we are in top (root) tree (dir)
+		$path = $link_target;
+	}
+
+	# remove //, /./, and /../
+	my @path_parts;
+	foreach my $part (split('/', $path)) {
+		# discard '.' and ''
+		next if (!$part || $part eq '.');
+		# handle '..'
+		if ($part eq '..') {
+			if (@path_parts) {
+				pop @path_parts;
+			} else {
+				# link leads outside repository (outside top dir)
+				return;
+			}
+		} else {
+			push @path_parts, $part;
+		}
+	}
+	$path = join('/', @path_parts);
+
+	return $path;
+}
+
+# print tree entry (row of git_tree), but without encompassing <tr> element
+sub git_print_tree_entry {
+	my ($t, $basedir, $hash_base, $have_blame) = @_;
+
+	my %base_key = ();
+	$base_key{'hash_base'} = $hash_base if defined $hash_base;
+
+	# The format of a table row is: mode list link.  Where mode is
+	# the mode of the entry, list is the name of the entry, an href,
+	# and link is the action links of the entry.
+
+	print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
+	if ($t->{'type'} eq "blob") {
+		print "<td class=\"list\">" .
+			$cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
+			                       file_name=>"$basedir$t->{'name'}", %base_key),
+			        -class => "list"}, esc_path($t->{'name'}));
+		if (S_ISLNK(oct $t->{'mode'})) {
+			my $link_target = git_get_link_target($t->{'hash'});
+			if ($link_target) {
+				my $norm_target = normalize_link_target($link_target, $basedir, $hash_base);
+				if (defined $norm_target) {
+					print " -> " .
+					      $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
+					                             file_name=>$norm_target),
+					               -title => $norm_target}, esc_path($link_target));
+				} else {
+					print " -> " . esc_path($link_target);
+				}
+			}
+		}
+		print "</td>\n";
+		print "<td class=\"link\">";
+		print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
+		                             file_name=>"$basedir$t->{'name'}", %base_key)},
+		              "blob");
+		if ($have_blame) {
+			print " | " .
+			      $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
+			                             file_name=>"$basedir$t->{'name'}", %base_key)},
+			              "blame");
+		}
+		if (defined $hash_base) {
+			print " | " .
+			      $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
+			                             hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
+			              "history");
+		}
+		print " | " .
+			$cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
+			                       file_name=>"$basedir$t->{'name'}")},
+			        "raw");
+		print "</td>\n";
+
+	} elsif ($t->{'type'} eq "tree") {
+		print "<td class=\"list\">";
+		print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
+		                             file_name=>"$basedir$t->{'name'}", %base_key)},
+		              esc_path($t->{'name'}));
+		print "</td>\n";
+		print "<td class=\"link\">";
+		print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
+		                             file_name=>"$basedir$t->{'name'}", %base_key)},
+		              "tree");
+		if (defined $hash_base) {
+			print " | " .
+			      $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
+			                             file_name=>"$basedir$t->{'name'}")},
+			              "history");
+		}
+		print "</td>\n";
 	}
 }
 
@@ -1179,8 +2182,8 @@ sub git_print_page_path {
 ## functions printing large fragments of HTML
 
 sub git_difftree_body {
-	my ($difftree, $parent) = @_;
-
+	my ($difftree, $hash, $parent) = @_;
+	my ($have_blame) = gitweb_check_feature('blame');
 	print "<div class=\"list_head\">\n";
 	if ($#{$difftree} > 10) {
 		print(($#{$difftree} + 1) . " files changed:\n");
@@ -1188,20 +2191,10 @@ sub git_difftree_body {
 	print "</div>\n";
 
 	print "<table class=\"diff_tree\">\n";
-	my $alternate = 0;
+	my $alternate = 1;
+	my $patchno = 0;
 	foreach my $line (@{$difftree}) {
-		# ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M	ls-files.c'
-		# ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M	rev-tree.c'
-		if ($line !~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
-			next;
-		}
-		my $from_mode = $1;
-		my $to_mode = $2;
-		my $from_id = $3;
-		my $to_id = $4;
-		my $status = $5;
-		my $similarity = $6; # score
-		my $file = validate_input(unquote($7));
+		my %diff = parse_difftree_raw_line($line);
 
 		if ($alternate) {
 			print "<tr class=\"dark\">\n";
@@ -1210,126 +2203,510 @@ sub git_difftree_body {
 		}
 		$alternate ^= 1;
 
-		if ($status eq "A") { # created
-			my $mode_chng = "";
-			if (S_ISREG(oct $to_mode)) {
-				$mode_chng = sprintf(" with mode: %04o", (oct $to_mode) & 0777);
+		my ($to_mode_oct, $to_mode_str, $to_file_type);
+		my ($from_mode_oct, $from_mode_str, $from_file_type);
+		if ($diff{'to_mode'} ne ('0' x 6)) {
+			$to_mode_oct = oct $diff{'to_mode'};
+			if (S_ISREG($to_mode_oct)) { # only for regular file
+				$to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
 			}
-			print "<td>" .
-			      $cgi->a({-href => href(action=>"blob", hash=>$to_id, hash_base=>$hash, file_name=>$file),
-			              -class => "list"}, esc_html($file)) .
-			      "</td>\n" .
-			      "<td><span class=\"file_status new\">[new " . file_type($to_mode) . "$mode_chng]</span></td>\n" .
-			      "<td class=\"link\">" .
-			      $cgi->a({-href => href(action=>"blob", hash=>$to_id, hash_base=>$hash, file_name=>$file)}, "blob") .
-			      "</td>\n";
-
-		} elsif ($status eq "D") { # deleted
-			print "<td>" .
-			      $cgi->a({-href => href(action=>"blob", hash=>$from_id, hash_base=>$parent, file_name=>$file),
-			               -class => "list"}, esc_html($file)) . "</td>\n" .
-			      "<td><span class=\"file_status deleted\">[deleted " . file_type($from_mode). "]</span></td>\n" .
-			      "<td class=\"link\">" .
-			      $cgi->a({-href => href(action=>"blob", hash=>$from_id, hash_base=>$parent, file_name=>$file)}, "blob") . " | " .
-			      $cgi->a({-href => href(action=>"history", hash_base=>$parent, file_name=>$file)}, "history") .
-			      "</td>\n"
-
-		} elsif ($status eq "M" || $status eq "T") { # modified, or type changed
+			$to_file_type = file_type($diff{'to_mode'});
+		}
+		if ($diff{'from_mode'} ne ('0' x 6)) {
+			$from_mode_oct = oct $diff{'from_mode'};
+			if (S_ISREG($to_mode_oct)) { # only for regular file
+				$from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
+			}
+			$from_file_type = file_type($diff{'from_mode'});
+		}
+
+		if ($diff{'status'} eq "A") { # created
+			my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
+			$mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
+			$mode_chng   .= "]</span>";
+			print "<td>";
+			print $cgi->a({-href => href(action=>"blob", hash=>$diff{'to_id'},
+			                             hash_base=>$hash, file_name=>$diff{'file'}),
+			              -class => "list"}, esc_path($diff{'file'}));
+			print "</td>\n";
+			print "<td>$mode_chng</td>\n";
+			print "<td class=\"link\">";
+			if ($action eq 'commitdiff') {
+				# link to patch
+				$patchno++;
+				print $cgi->a({-href => "#patch$patchno"}, "patch");
+				print " | ";
+			}
+			print $cgi->a({-href => href(action=>"blob", hash=>$diff{'to_id'},
+			                             hash_base=>$hash, file_name=>$diff{'file'})},
+			              "blob");
+			print "</td>\n";
+
+		} elsif ($diff{'status'} eq "D") { # deleted
+			my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
+			print "<td>";
+			print $cgi->a({-href => href(action=>"blob", hash=>$diff{'from_id'},
+			                             hash_base=>$parent, file_name=>$diff{'file'}),
+			               -class => "list"}, esc_path($diff{'file'}));
+			print "</td>\n";
+			print "<td>$mode_chng</td>\n";
+			print "<td class=\"link\">";
+			if ($action eq 'commitdiff') {
+				# link to patch
+				$patchno++;
+				print $cgi->a({-href => "#patch$patchno"}, "patch");
+				print " | ";
+			}
+			print $cgi->a({-href => href(action=>"blob", hash=>$diff{'from_id'},
+			                             hash_base=>$parent, file_name=>$diff{'file'})},
+			              "blob") . " | ";
+			if ($have_blame) {
+				print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
+				                             file_name=>$diff{'file'})},
+				              "blame") . " | ";
+			}
+			print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
+			                             file_name=>$diff{'file'})},
+			              "history");
+			print "</td>\n";
+
+		} elsif ($diff{'status'} eq "M" || $diff{'status'} eq "T") { # modified, or type changed
 			my $mode_chnge = "";
-			if ($from_mode != $to_mode) {
-				$mode_chnge = " <span class=\"file_status mode_chnge\">[changed";
-				if (((oct $from_mode) & S_IFMT) != ((oct $to_mode) & S_IFMT)) {
-					$mode_chnge .= " from " . file_type($from_mode) . " to " . file_type($to_mode);
+			if ($diff{'from_mode'} != $diff{'to_mode'}) {
+				$mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
+				if ($from_file_type ne $to_file_type) {
+					$mode_chnge .= " from $from_file_type to $to_file_type";
 				}
-				if (((oct $from_mode) & 0777) != ((oct $to_mode) & 0777)) {
-					if (S_ISREG($from_mode) && S_ISREG($to_mode)) {
-						$mode_chnge .= sprintf(" mode: %04o->%04o", (oct $from_mode) & 0777, (oct $to_mode) & 0777);
-					} elsif (S_ISREG($to_mode)) {
-						$mode_chnge .= sprintf(" mode: %04o", (oct $to_mode) & 0777);
+				if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
+					if ($from_mode_str && $to_mode_str) {
+						$mode_chnge .= " mode: $from_mode_str->$to_mode_str";
+					} elsif ($to_mode_str) {
+						$mode_chnge .= " mode: $to_mode_str";
 					}
 				}
 				$mode_chnge .= "]</span>\n";
 			}
 			print "<td>";
-			if ($to_id ne $from_id) { # modified
-				print $cgi->a({-href => href(action=>"blobdiff", hash=>$to_id, hash_parent=>$from_id, hash_base=>$hash, file_name=>$file),
-				              -class => "list"}, esc_html($file));
-			} else { # mode changed
-				print $cgi->a({-href => href(action=>"blob", hash=>$to_id, hash_base=>$hash, file_name=>$file),
-				              -class => "list"}, esc_html($file));
+			print $cgi->a({-href => href(action=>"blob", hash=>$diff{'to_id'},
+			                             hash_base=>$hash, file_name=>$diff{'file'}),
+			              -class => "list"}, esc_path($diff{'file'}));
+			print "</td>\n";
+			print "<td>$mode_chnge</td>\n";
+			print "<td class=\"link\">";
+			if ($action eq 'commitdiff') {
+				# link to patch
+				$patchno++;
+				print $cgi->a({-href => "#patch$patchno"}, "patch") .
+				      " | ";
+			} elsif ($diff{'to_id'} ne $diff{'from_id'}) {
+				# "commit" view and modified file (not onlu mode changed)
+				print $cgi->a({-href => href(action=>"blobdiff",
+				                             hash=>$diff{'to_id'}, hash_parent=>$diff{'from_id'},
+				                             hash_base=>$hash, hash_parent_base=>$parent,
+				                             file_name=>$diff{'file'})},
+				              "diff") .
+				      " | ";
 			}
-			print "</td>\n" .
-			      "<td>$mode_chnge</td>\n" .
-			      "<td class=\"link\">" .
-				$cgi->a({-href => href(action=>"blob", hash=>$to_id, hash_base=>$hash, file_name=>$file)}, "blob");
-			if ($to_id ne $from_id) { # modified
-				print $cgi->a({-href => href(action=>"blobdiff", hash=>$to_id, hash_parent=>$from_id, hash_base=>$hash, file_name=>$file)}, "diff");
+			print $cgi->a({-href => href(action=>"blob", hash=>$diff{'to_id'},
+			                             hash_base=>$hash, file_name=>$diff{'file'})},
+			               "blob") . " | ";
+			if ($have_blame) {
+				print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
+				                             file_name=>$diff{'file'})},
+				              "blame") . " | ";
 			}
-			print " | " . $cgi->a({-href => href(action=>"history", hash_base=>$hash, file_name=>$file)}, "history") . "\n";
+			print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
+			                             file_name=>$diff{'file'})},
+			              "history");
 			print "</td>\n";
 
-		} elsif ($status eq "R") { # renamed
-			my ($from_file, $to_file) = split "\t", $file;
+		} elsif ($diff{'status'} eq "R" || $diff{'status'} eq "C") { # renamed or copied
+			my %status_name = ('R' => 'moved', 'C' => 'copied');
+			my $nstatus = $status_name{$diff{'status'}};
 			my $mode_chng = "";
-			if ($from_mode != $to_mode) {
-				$mode_chng = sprintf(", mode: %04o", (oct $to_mode) & 0777);
+			if ($diff{'from_mode'} != $diff{'to_mode'}) {
+				# mode also for directories, so we cannot use $to_mode_str
+				$mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
 			}
 			print "<td>" .
-			      $cgi->a({-href => href(action=>"blob", hash=>$to_id, hash_base=>$hash, file_name=>$to_file),
-			              -class => "list"}, esc_html($to_file)) . "</td>\n" .
-			      "<td><span class=\"file_status moved\">[moved from " .
-			      $cgi->a({-href => href(action=>"blob", hash=>$from_id, hash_base=>$parent, file_name=>$from_file),
-			              -class => "list"}, esc_html($from_file)) .
-			      " with " . (int $similarity) . "% similarity$mode_chng]</span></td>\n" .
-			      "<td class=\"link\">" .
-			      $cgi->a({-href => href(action=>"blob", hash=>$to_id, hash_base=>$hash, file_name=>$to_file)}, "blob");
-			if ($to_id ne $from_id) {
-				print " | " .
-				      $cgi->a({-href => "$my_uri?" .
-				              esc_param("p=$project;a=blobdiff;h=$to_id;hp=$from_id;hb=$hash;f=$to_file;fp=$from_file")}, "diff");
+			      $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
+			                             hash=>$diff{'to_id'}, file_name=>$diff{'to_file'}),
+			              -class => "list"}, esc_path($diff{'to_file'})) . "</td>\n" .
+			      "<td><span class=\"file_status $nstatus\">[$nstatus from " .
+			      $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
+			                             hash=>$diff{'from_id'}, file_name=>$diff{'from_file'}),
+			              -class => "list"}, esc_path($diff{'from_file'})) .
+			      " with " . (int $diff{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
+			      "<td class=\"link\">";
+			if ($action eq 'commitdiff') {
+				# link to patch
+				$patchno++;
+				print $cgi->a({-href => "#patch$patchno"}, "patch") .
+				      " | ";
+			} elsif ($diff{'to_id'} ne $diff{'from_id'}) {
+				# "commit" view and modified file (not only pure rename or copy)
+				print $cgi->a({-href => href(action=>"blobdiff",
+				                             hash=>$diff{'to_id'}, hash_parent=>$diff{'from_id'},
+				                             hash_base=>$hash, hash_parent_base=>$parent,
+				                             file_name=>$diff{'to_file'}, file_parent=>$diff{'from_file'})},
+				              "diff") .
+				      " | ";
+			}
+			print $cgi->a({-href => href(action=>"blob", hash=>$diff{'to_id'},
+			                             hash_base=>$parent, file_name=>$diff{'to_file'})},
+			              "blob") . " | ";
+			if ($have_blame) {
+				print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
+				                             file_name=>$diff{'to_file'})},
+				              "blame") . " | ";
 			}
+			print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
+			                            file_name=>$diff{'to_file'})},
+			              "history");
 			print "</td>\n";
 
-		} elsif ($status eq "C") { # copied
-			my ($from_file, $to_file) = split "\t", $file;
-			my $mode_chng = "";
-			if ($from_mode != $to_mode) {
-				$mode_chng = sprintf(", mode: %04o", (oct $to_mode) & 0777);
+		} # we should not encounter Unmerged (U) or Unknown (X) status
+		print "</tr>\n";
+	}
+	print "</table>\n";
+}
+
+sub git_patchset_body {
+	my ($fd, $difftree, $hash, $hash_parent) = @_;
+
+	my $patch_idx = 0;
+	my $patch_line;
+	my $diffinfo;
+	my (%from, %to);
+
+	print "<div class=\"patchset\">\n";
+
+	# skip to first patch
+	while ($patch_line = <$fd>) {
+		chomp $patch_line;
+
+		last if ($patch_line =~ m/^diff /);
+	}
+
+ PATCH:
+	while ($patch_line) {
+		my @diff_header;
+		my ($from_id, $to_id);
+
+		# git diff header
+		#assert($patch_line =~ m/^diff /) if DEBUG;
+		#assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
+		push @diff_header, $patch_line;
+
+		# extended diff header
+	EXTENDED_HEADER:
+		while ($patch_line = <$fd>) {
+			chomp $patch_line;
+
+			last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
+
+			if ($patch_line =~ m/^index ([0-9a-fA-F]{40})..([0-9a-fA-F]{40})/) {
+				$from_id = $1;
+				$to_id   = $2;
 			}
-			print "<td>" .
-			      $cgi->a({-href => href(action=>"blob", hash=>$to_id, hash_base=>$hash, file_name=>$to_file),
-			              -class => "list"}, esc_html($to_file)) . "</td>\n" .
-			      "<td><span class=\"file_status copied\">[copied from " .
-			      $cgi->a({-href => href(action=>"blob", hash=>$from_id, hash_base=>$parent, file_name=>$from_file),
-			              -class => "list"}, esc_html($from_file)) .
-			      " with " . (int $similarity) . "% similarity$mode_chng]</span></td>\n" .
-			      "<td class=\"link\">" .
-			      $cgi->a({-href => href(action=>"blob", hash=>$to_id, hash_base=>$hash, file_name=>$to_file)}, "blob");
-			if ($to_id ne $from_id) {
-				print " | " .
-				      $cgi->a({-href => "$my_uri?" .
-				              esc_param("p=$project;a=blobdiff;h=$to_id;hp=$from_id;hb=$hash;f=$to_file;fp=$from_file")}, "diff");
+
+			push @diff_header, $patch_line;
+		}
+		my $last_patch_line = $patch_line;
+
+		# check if current patch belong to current raw line
+		# and parse raw git-diff line if needed
+		if (defined $diffinfo &&
+		    $diffinfo->{'from_id'} eq $from_id &&
+		    $diffinfo->{'to_id'}   eq $to_id) {
+			# this is split patch
+			print "<div class=\"patch cont\">\n";
+		} else {
+			# advance raw git-diff output if needed
+			$patch_idx++ if defined $diffinfo;
+
+			# read and prepare patch information
+			if (ref($difftree->[$patch_idx]) eq "HASH") {
+				# pre-parsed (or generated by hand)
+				$diffinfo = $difftree->[$patch_idx];
+			} else {
+				$diffinfo = parse_difftree_raw_line($difftree->[$patch_idx]);
+			}
+			$from{'file'} = $diffinfo->{'from_file'} || $diffinfo->{'file'};
+			$to{'file'}   = $diffinfo->{'to_file'}   || $diffinfo->{'file'};
+			if ($diffinfo->{'status'} ne "A") { # not new (added) file
+				$from{'href'} = href(action=>"blob", hash_base=>$hash_parent,
+				                     hash=>$diffinfo->{'from_id'},
+				                     file_name=>$from{'file'});
+			} else {
+				delete $from{'href'};
+			}
+			if ($diffinfo->{'status'} ne "D") { # not deleted file
+				$to{'href'} = href(action=>"blob", hash_base=>$hash,
+				                   hash=>$diffinfo->{'to_id'},
+				                   file_name=>$to{'file'});
+			} else {
+				delete $to{'href'};
+			}
+			# this is first patch for raw difftree line with $patch_idx index
+			# we index @$difftree array from 0, but number patches from 1
+			print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
+		}
+
+		# print "git diff" header
+		$patch_line = shift @diff_header;
+		$patch_line =~ s!^(diff (.*?) )"?a/.*$!$1!;
+		if ($from{'href'}) {
+			$patch_line .= $cgi->a({-href => $from{'href'}, -class => "path"},
+			                       'a/' . esc_path($from{'file'}));
+		} else { # file was added
+			$patch_line .= 'a/' . esc_path($from{'file'});
+		}
+		$patch_line .= ' ';
+		if ($to{'href'}) {
+			$patch_line .= $cgi->a({-href => $to{'href'}, -class => "path"},
+			                       'b/' . esc_path($to{'file'}));
+		} else { # file was deleted
+			$patch_line .= 'b/' . esc_path($to{'file'});
+		}
+		print "<div class=\"diff header\">$patch_line</div>\n";
+
+		# print extended diff header
+		print "<div class=\"diff extended_header\">\n" if (@diff_header > 0);
+	EXTENDED_HEADER:
+		foreach $patch_line (@diff_header) {
+			# match <path>
+			if ($patch_line =~ s!^((copy|rename) from ).*$!$1! && $from{'href'}) {
+				$patch_line .= $cgi->a({-href=>$from{'href'}, -class=>"path"},
+				                       esc_path($from{'file'}));
+			}
+			if ($patch_line =~ s!^((copy|rename) to ).*$!$1! && $to{'href'}) {
+				$patch_line .= $cgi->a({-href=>$to{'href'}, -class=>"path"},
+				                       esc_path($to{'file'}));
+			}
+			# match <mode>
+			if ($patch_line =~ m/\s(\d{6})$/) {
+				$patch_line .= '<span class="info"> (' .
+				               file_type_long($1) .
+				               ')</span>';
+			}
+			# match <hash>
+			if ($patch_line =~ m/^index/) {
+				my ($from_link, $to_link);
+				if ($from{'href'}) {
+					$from_link = $cgi->a({-href=>$from{'href'}, -class=>"hash"},
+					                     substr($diffinfo->{'from_id'},0,7));
+				} else {
+					$from_link = '0' x 7;
+				}
+				if ($to{'href'}) {
+					$to_link = $cgi->a({-href=>$to{'href'}, -class=>"hash"},
+					                   substr($diffinfo->{'to_id'},0,7));
+				} else {
+					$to_link = '0' x 7;
+				}
+				#affirm {
+				#	my ($from_hash, $to_hash) =
+				#		($patch_line =~ m/^index ([0-9a-fA-F]{40})..([0-9a-fA-F]{40})/);
+				#	my ($from_id, $to_id) =
+				#		($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
+				#	($from_hash eq $from_id) && ($to_hash eq $to_id);
+				#} if DEBUG;
+				my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
+				$patch_line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
+			}
+			print $patch_line . "<br/>\n";
+		}
+		print "</div>\n"  if (@diff_header > 0); # class="diff extended_header"
+
+		# from-file/to-file diff header
+		$patch_line = $last_patch_line;
+		if (! $patch_line) {
+			print "</div>\n"; # class="patch"
+			last PATCH;
+		}
+		next PATCH if ($patch_line =~ m/^diff /);
+		#assert($patch_line =~ m/^---/) if DEBUG;
+		if ($from{'href'} && $patch_line =~ m!^--- "?a/!) {
+			$patch_line = '--- a/' .
+			              $cgi->a({-href=>$from{'href'}, -class=>"path"},
+			                      esc_path($from{'file'}));
+		}
+		print "<div class=\"diff from_file\">$patch_line</div>\n";
+
+		$patch_line = <$fd>;
+		chomp $patch_line;
+
+		#assert($patch_line =~ m/^+++/) if DEBUG;
+		if ($to{'href'} && $patch_line =~ m!^\+\+\+ "?b/!) {
+			$patch_line = '+++ b/' .
+			              $cgi->a({-href=>$to{'href'}, -class=>"path"},
+			                      esc_path($to{'file'}));
+		}
+		print "<div class=\"diff to_file\">$patch_line</div>\n";
+
+		# the patch itself
+	LINE:
+		while ($patch_line = <$fd>) {
+			chomp $patch_line;
+
+			next PATCH if ($patch_line =~ m/^diff /);
+
+			print format_diff_line($patch_line, \%from, \%to);
+		}
+
+	} continue {
+		print "</div>\n"; # class="patch"
+	}
+
+	print "</div>\n"; # class="patchset"
+}
+
+# . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
+
+sub git_project_list_body {
+	my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
+
+	my ($check_forks) = gitweb_check_feature('forks');
+
+	my @projects;
+	foreach my $pr (@$projlist) {
+		my (@aa) = git_get_last_activity($pr->{'path'});
+		unless (@aa) {
+			next;
+		}
+		($pr->{'age'}, $pr->{'age_string'}) = @aa;
+		if (!defined $pr->{'descr'}) {
+			my $descr = git_get_project_description($pr->{'path'}) || "";
+			$pr->{'descr_long'} = to_utf8($descr);
+			$pr->{'descr'} = chop_str($descr, 25, 5);
+		}
+		if (!defined $pr->{'owner'}) {
+			$pr->{'owner'} = get_file_owner("$projectroot/$pr->{'path'}") || "";
+		}
+		if ($check_forks) {
+			my $pname = $pr->{'path'};
+			if (($pname =~ s/\.git$//) &&
+			    ($pname !~ /\/$/) &&
+			    (-d "$projectroot/$pname")) {
+				$pr->{'forks'} = "-d $projectroot/$pname";
+			}
+			else {
+				$pr->{'forks'} = 0;
+			}
+		}
+		push @projects, $pr;
+	}
+
+	$order ||= "project";
+	$from = 0 unless defined $from;
+	$to = $#projects if (!defined $to || $#projects < $to);
+
+	print "<table class=\"project_list\">\n";
+	unless ($no_header) {
+		print "<tr>\n";
+		if ($check_forks) {
+			print "<th></th>\n";
+		}
+		if ($order eq "project") {
+			@projects = sort {$a->{'path'} cmp $b->{'path'}} @projects;
+			print "<th>Project</th>\n";
+		} else {
+			print "<th>" .
+			      $cgi->a({-href => href(project=>undef, order=>'project'),
+			               -class => "header"}, "Project") .
+			      "</th>\n";
+		}
+		if ($order eq "descr") {
+			@projects = sort {$a->{'descr'} cmp $b->{'descr'}} @projects;
+			print "<th>Description</th>\n";
+		} else {
+			print "<th>" .
+			      $cgi->a({-href => href(project=>undef, order=>'descr'),
+			               -class => "header"}, "Description") .
+			      "</th>\n";
+		}
+		if ($order eq "owner") {
+			@projects = sort {$a->{'owner'} cmp $b->{'owner'}} @projects;
+			print "<th>Owner</th>\n";
+		} else {
+			print "<th>" .
+			      $cgi->a({-href => href(project=>undef, order=>'owner'),
+			               -class => "header"}, "Owner") .
+			      "</th>\n";
+		}
+		if ($order eq "age") {
+			@projects = sort {$a->{'age'} <=> $b->{'age'}} @projects;
+			print "<th>Last Change</th>\n";
+		} else {
+			print "<th>" .
+			      $cgi->a({-href => href(project=>undef, order=>'age'),
+			               -class => "header"}, "Last Change") .
+			      "</th>\n";
+		}
+		print "<th></th>\n" .
+		      "</tr>\n";
+	}
+	my $alternate = 1;
+	for (my $i = $from; $i <= $to; $i++) {
+		my $pr = $projects[$i];
+		if ($alternate) {
+			print "<tr class=\"dark\">\n";
+		} else {
+			print "<tr class=\"light\">\n";
+		}
+		$alternate ^= 1;
+		if ($check_forks) {
+			print "<td>";
+			if ($pr->{'forks'}) {
+				print "<!-- $pr->{'forks'} -->\n";
+				print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
 			}
 			print "</td>\n";
-		} # we should not encounter Unmerged (U) or Unknown (X) status
-		print "</tr>\n";
+		}
+		print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
+		                        -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
+		      "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
+		                        -class => "list", -title => $pr->{'descr_long'}},
+		                        esc_html($pr->{'descr'})) . "</td>\n" .
+		      "<td><i>" . chop_str($pr->{'owner'}, 15) . "</i></td>\n";
+		print "<td class=\"". age_class($pr->{'age'}) . "\">" .
+		      $pr->{'age_string'} . "</td>\n" .
+		      "<td class=\"link\">" .
+		      $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
+		      $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
+		      $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
+		      $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
+		      ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
+		      "</td>\n" .
+		      "</tr>\n";
+	}
+	if (defined $extra) {
+		print "<tr>\n";
+		if ($check_forks) {
+			print "<td></td>\n";
+		}
+		print "<td colspan=\"5\">$extra</td>\n" .
+		      "</tr>\n";
 	}
 	print "</table>\n";
 }
 
 sub git_shortlog_body {
 	# uses global variable $project
-	my ($revlist, $from, $to, $refs, $extra) = @_;
+	my ($commitlist, $from, $to, $refs, $extra) = @_;
+
+	my $have_snapshot = gitweb_have_snapshot();
+
 	$from = 0 unless defined $from;
-	$to = $#{$revlist} if (!defined $to || $#{$revlist} < $to);
+	$to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
 
 	print "<table class=\"shortlog\" cellspacing=\"0\">\n";
-	my $alternate = 0;
+	my $alternate = 1;
 	for (my $i = $from; $i <= $to; $i++) {
-		my $commit = $revlist->[$i];
-		#my $ref = defined $refs ? format_ref_marker($refs, $commit) : '';
+		my %co = %{$commitlist->[$i]};
+		my $commit = $co{'id'};
 		my $ref = format_ref_marker($refs, $commit);
-		my %co = parse_commit($commit);
 		if ($alternate) {
 			print "<tr class=\"dark\">\n";
 		} else {
@@ -1340,12 +2717,17 @@ sub git_shortlog_body {
 		print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
 		      "<td><i>" . esc_html(chop_str($co{'author_name'}, 10)) . "</i></td>\n" .
 		      "<td>";
-		print format_subject_html($co{'title'}, $co{'title_short'}, href(action=>"commit", hash=>$commit), $ref);
+		print format_subject_html($co{'title'}, $co{'title_short'},
+		                          href(action=>"commit", hash=>$commit), $ref);
 		print "</td>\n" .
 		      "<td class=\"link\">" .
 		      $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
-		      $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
-		      "</td>\n" .
+		      $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
+		      $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
+		if ($have_snapshot) {
+			print " | " . $cgi->a({-href => href(action=>"snapshot", hash=>$commit)}, "snapshot");
+		}
+		print "</td>\n" .
 		      "</tr>\n";
 	}
 	if (defined $extra) {
@@ -1358,20 +2740,19 @@ sub git_shortlog_body {
 
 sub git_history_body {
 	# Warning: assumes constant type (blob or tree) during history
-	my ($fd, $refs, $hash_base, $ftype, $extra) = @_;
+	my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
 
-	print "<table class=\"history\" cellspacing=\"0\">\n";
-	my $alternate = 0;
-	while (my $line = <$fd>) {
-		if ($line !~ m/^([0-9a-fA-F]{40})/) {
-			next;
-		}
+	$from = 0 unless defined $from;
+	$to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
 
-		my $commit = $1;
-		my %co = parse_commit($commit);
+	print "<table class=\"history\" cellspacing=\"0\">\n";
+	my $alternate = 1;
+	for (my $i = $from; $i <= $to; $i++) {
+		my %co = %{$commitlist->[$i]};
 		if (!%co) {
 			next;
 		}
+		my $commit = $co{'id'};
 
 		my $ref = format_ref_marker($refs, $commit);
 
@@ -1386,12 +2767,12 @@ sub git_history_body {
 		      "<td><i>" . esc_html(chop_str($co{'author_name'}, 15, 3)) . "</i></td>\n" .
 		      "<td>";
 		# originally git_history used chop_str($co{'title'}, 50)
-		print format_subject_html($co{'title'}, $co{'title_short'}, href(action=>"commit", hash=>$commit), $ref);
+		print format_subject_html($co{'title'}, $co{'title_short'},
+		                          href(action=>"commit", hash=>$commit), $ref);
 		print "</td>\n" .
 		      "<td class=\"link\">" .
-		      $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
-		      $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
-		      $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype);
+		      $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
+		      $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
 
 		if ($ftype eq 'blob') {
 			my $blob_current = git_get_hash_by_path($hash_base, $file_name);
@@ -1399,7 +2780,10 @@ sub git_history_body {
 			if (defined $blob_current && defined $blob_parent &&
 					$blob_current ne $blob_parent) {
 				print " | " .
-					$cgi->a({-href => href(action=>"blobdiff", hash=>$blob_current, hash_parent=>$blob_parent, hash_base=>$commit, file_name=>$file_name)},
+					$cgi->a({-href => href(action=>"blobdiff",
+					                       hash=>$blob_current, hash_parent=>$blob_parent,
+					                       hash_base=>$hash_base, hash_parent_base=>$commit,
+					                       file_name=>$file_name)},
 					        "diff to current");
 			}
 		}
@@ -1421,12 +2805,11 @@ sub git_tags_body {
 	$to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
 
 	print "<table class=\"tags\" cellspacing=\"0\">\n";
-	my $alternate = 0;
+	my $alternate = 1;
 	for (my $i = $from; $i <= $to; $i++) {
 		my $entry = $taglist->[$i];
 		my %tag = %$entry;
-		my $comment_lines = $tag{'comment'};
-		my $comment = shift @$comment_lines;
+		my $comment = $tag{'subject'};
 		my $comment_short;
 		if (defined $comment) {
 			$comment_short = chop_str($comment, 30, 5);
@@ -1437,14 +2820,19 @@ sub git_tags_body {
 			print "<tr class=\"light\">\n";
 		}
 		$alternate ^= 1;
-		print "<td><i>$tag{'age'}</i></td>\n" .
-		      "<td>" .
+		if (defined $tag{'age'}) {
+			print "<td><i>$tag{'age'}</i></td>\n";
+		} else {
+			print "<td></td>\n";
+		}
+		print "<td>" .
 		      $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
-		               -class => "list"}, "<b>" . esc_html($tag{'name'}) . "</b>") .
+		               -class => "list name"}, esc_html($tag{'name'})) .
 		      "</td>\n" .
 		      "<td>";
 		if (defined $comment) {
-			print format_subject_html($comment, $comment_short, href(action=>"tag", hash=>$tag{'id'}));
+			print format_subject_html($comment, $comment_short,
+			                          href(action=>"tag", hash=>$tag{'id'}));
 		}
 		print "</td>\n" .
 		      "<td class=\"selflink\">";
@@ -1458,7 +2846,7 @@ sub git_tags_body {
 		      $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
 		if ($tag{'reftype'} eq "commit") {
 			print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'name'})}, "shortlog") .
-			      " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'refid'})}, "log");
+			      " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'name'})}, "log");
 		} elsif ($tag{'reftype'} eq "blob") {
 			print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
 		}
@@ -1475,30 +2863,31 @@ sub git_tags_body {
 
 sub git_heads_body {
 	# uses global variable $project
-	my ($taglist, $head, $from, $to, $extra) = @_;
+	my ($headlist, $head, $from, $to, $extra) = @_;
 	$from = 0 unless defined $from;
-	$to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
+	$to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
 
 	print "<table class=\"heads\" cellspacing=\"0\">\n";
-	my $alternate = 0;
+	my $alternate = 1;
 	for (my $i = $from; $i <= $to; $i++) {
-		my $entry = $taglist->[$i];
-		my %tag = %$entry;
-		my $curr = $tag{'id'} eq $head;
+		my $entry = $headlist->[$i];
+		my %ref = %$entry;
+		my $curr = $ref{'id'} eq $head;
 		if ($alternate) {
 			print "<tr class=\"dark\">\n";
 		} else {
 			print "<tr class=\"light\">\n";
 		}
 		$alternate ^= 1;
-		print "<td><i>$tag{'age'}</i></td>\n" .
-		      ($tag{'id'} eq $head ? "<td class=\"current_head\">" : "<td>") .
-		      $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'name'}),
-		               -class => "list"}, "<b>" . esc_html($tag{'name'}) . "</b>") .
+		print "<td><i>$ref{'age'}</i></td>\n" .
+		      ($curr ? "<td class=\"current_head\">" : "<td>") .
+		      $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'name'}),
+		               -class => "list name"},esc_html($ref{'name'})) .
 		      "</td>\n" .
 		      "<td class=\"link\">" .
-		      $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'name'})}, "shortlog") . " | " .
-		      $cgi->a({-href => href(action=>"log", hash=>$tag{'name'})}, "log") .
+		      $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'name'})}, "shortlog") . " | " .
+		      $cgi->a({-href => href(action=>"log", hash=>$ref{'name'})}, "log") . " | " .
+		      $cgi->a({-href => href(action=>"tree", hash=>$ref{'name'}, hash_base=>$ref{'name'})}, "tree") .
 		      "</td>\n" .
 		      "</tr>";
 	}
@@ -1510,77 +2899,58 @@ sub git_heads_body {
 	print "</table>\n";
 }
 
-## ----------------------------------------------------------------------
-## functions printing large fragments, format as one of arguments
-
-sub git_diff_print {
-	my $from = shift;
-	my $from_name = shift;
-	my $to = shift;
-	my $to_name = shift;
-	my $format = shift || "html";
-
-	my $from_tmp = "/dev/null";
-	my $to_tmp = "/dev/null";
-	my $pid = $$;
-
-	# create tmp from-file
-	if (defined $from) {
-		$from_tmp = "$git_temp/gitweb_" . $$ . "_from";
-		open my $fd2, "> $from_tmp";
-		open my $fd, "-|", $GIT, "cat-file", "blob", $from;
-		my @file = <$fd>;
-		print $fd2 @file;
-		close $fd2;
-		close $fd;
-	}
-
-	# create tmp to-file
-	if (defined $to) {
-		$to_tmp = "$git_temp/gitweb_" . $$ . "_to";
-		open my $fd2, "> $to_tmp";
-		open my $fd, "-|", $GIT, "cat-file", "blob", $to;
-		my @file = <$fd>;
-		print $fd2 @file;
-		close $fd2;
-		close $fd;
-	}
+sub git_search_grep_body {
+	my ($commitlist, $from, $to, $extra) = @_;
+	$from = 0 unless defined $from;
+	$to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
 
-	open my $fd, "-|", "/usr/bin/diff -u -p -L \'$from_name\' -L \'$to_name\' $from_tmp $to_tmp";
-	if ($format eq "plain") {
-		undef $/;
-		print <$fd>;
-		$/ = "\n";
-	} else {
-		while (my $line = <$fd>) {
-			chomp $line;
-			my $char = substr($line, 0, 1);
-			my $diff_class = "";
-			if ($char eq '+') {
-				$diff_class = " add";
-			} elsif ($char eq "-") {
-				$diff_class = " rem";
-			} elsif ($char eq "@") {
-				$diff_class = " chunk_header";
-			} elsif ($char eq "\\") {
-				# skip errors
-				next;
+	print "<table class=\"grep\" cellspacing=\"0\">\n";
+	my $alternate = 1;
+	for (my $i = $from; $i <= $to; $i++) {
+		my %co = %{$commitlist->[$i]};
+		if (!%co) {
+			next;
+		}
+		my $commit = $co{'id'};
+		if ($alternate) {
+			print "<tr class=\"dark\">\n";
+		} else {
+			print "<tr class=\"light\">\n";
+		}
+		$alternate ^= 1;
+		print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
+		      "<td><i>" . esc_html(chop_str($co{'author_name'}, 15, 5)) . "</i></td>\n" .
+		      "<td>" .
+		      $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}), -class => "list subject"},
+			       esc_html(chop_str($co{'title'}, 50)) . "<br/>");
+		my $comment = $co{'comment'};
+		foreach my $line (@$comment) {
+			if ($line =~ m/^(.*)($searchtext)(.*)$/i) {
+				my $lead = esc_html($1) || "";
+				$lead = chop_str($lead, 30, 10);
+				my $match = esc_html($2) || "";
+				my $trail = esc_html($3) || "";
+				$trail = chop_str($trail, 30, 10);
+				my $text = "$lead<span class=\"match\">$match</span>$trail";
+				print chop_str($text, 80, 5) . "<br/>\n";
 			}
-			$line = untabify($line);
-			print "<div class=\"diff$diff_class\">" . esc_html($line) . "</div>\n";
 		}
+		print "</td>\n" .
+		      "<td class=\"link\">" .
+		      $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
+		      " | " .
+		      $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
+		print "</td>\n" .
+		      "</tr>\n";
 	}
-	close $fd;
-
-	if (defined $from) {
-		unlink($from_tmp);
-	}
-	if (defined $to) {
-		unlink($to_tmp);
+	if (defined $extra) {
+		print "<tr>\n" .
+		      "<td colspan=\"3\">$extra</td>\n" .
+		      "</tr>\n";
 	}
+	print "</table>\n";
 }
 
-
 ## ======================================================================
 ## ======================================================================
 ## actions
@@ -1592,30 +2962,9 @@ sub git_project_list {
 	}
 
 	my @list = git_get_projects_list();
-	my @projects;
 	if (!@list) {
 		die_error(undef, "No projects found");
 	}
-	foreach my $pr (@list) {
-		my $head = git_get_head_hash($pr->{'path'});
-		if (!defined $head) {
-			next;
-		}
-		$ENV{'GIT_DIR'} = "$projectroot/$pr->{'path'}";
-		my %co = parse_commit($head);
-		if (!%co) {
-			next;
-		}
-		$pr->{'commit'} = \%co;
-		if (!defined $pr->{'descr'}) {
-			my $descr = git_get_project_description($pr->{'path'}) || "";
-			$pr->{'descr'} = chop_str($descr, 25, 5);
-		}
-		if (!defined $pr->{'owner'}) {
-			$pr->{'owner'} = get_file_owner("$projectroot/$pr->{'path'}") || "";
-		}
-		push @projects, $pr;
-	}
 
 	git_header_html();
 	if (-f $home_text) {
@@ -1625,81 +2974,72 @@ sub git_project_list {
 		close $fd;
 		print "</div>\n";
 	}
-	print "<table class=\"project_list\">\n" .
-	      "<tr>\n";
-	$order ||= "project";
-	if ($order eq "project") {
-		@projects = sort {$a->{'path'} cmp $b->{'path'}} @projects;
-		print "<th>Project</th>\n";
-	} else {
-		print "<th>" .
-		      $cgi->a({-href => "$my_uri?" . esc_param("o=project"),
-		               -class => "header"}, "Project") .
-		      "</th>\n";
-	}
-	if ($order eq "descr") {
-		@projects = sort {$a->{'descr'} cmp $b->{'descr'}} @projects;
-		print "<th>Description</th>\n";
-	} else {
-		print "<th>" .
-		      $cgi->a({-href => "$my_uri?" . esc_param("o=descr"),
-		               -class => "header"}, "Description") .
-		      "</th>\n";
-	}
-	if ($order eq "owner") {
-		@projects = sort {$a->{'owner'} cmp $b->{'owner'}} @projects;
-		print "<th>Owner</th>\n";
-	} else {
-		print "<th>" .
-		      $cgi->a({-href => "$my_uri?" . esc_param("o=owner"),
-		               -class => "header"}, "Owner") .
-		      "</th>\n";
-	}
-	if ($order eq "age") {
-		@projects = sort {$a->{'commit'}{'age'} <=> $b->{'commit'}{'age'}} @projects;
-		print "<th>Last Change</th>\n";
-	} else {
-		print "<th>" .
-		      $cgi->a({-href => "$my_uri?" . esc_param("o=age"),
-		               -class => "header"}, "Last Change") .
-		      "</th>\n";
+	git_project_list_body(\@list, $order);
+	git_footer_html();
+}
+
+sub git_forks {
+	my $order = $cgi->param('o');
+	if (defined $order && $order !~ m/project|descr|owner|age/) {
+		die_error(undef, "Unknown order parameter");
 	}
-	print "<th></th>\n" .
-	      "</tr>\n";
-	my $alternate = 0;
+
+	my @list = git_get_projects_list($project);
+	if (!@list) {
+		die_error(undef, "No forks found");
+	}
+
+	git_header_html();
+	git_print_page_nav('','');
+	git_print_header_div('summary', "$project forks");
+	git_project_list_body(\@list, $order);
+	git_footer_html();
+}
+
+sub git_project_index {
+	my @projects = git_get_projects_list($project);
+
+	print $cgi->header(
+		-type => 'text/plain',
+		-charset => 'utf-8',
+		-content_disposition => 'inline; filename="index.aux"');
+
 	foreach my $pr (@projects) {
-		if ($alternate) {
-			print "<tr class=\"dark\">\n";
-		} else {
-			print "<tr class=\"light\">\n";
+		if (!exists $pr->{'owner'}) {
+			$pr->{'owner'} = get_file_owner("$projectroot/$pr->{'path'}");
 		}
-		$alternate ^= 1;
-		print "<td>" . $cgi->a({-href => "$my_uri?" . esc_param("p=$pr->{'path'};a=summary"),
-		                        -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
-		      "<td>" . esc_html($pr->{'descr'}) . "</td>\n" .
-		      "<td><i>" . chop_str($pr->{'owner'}, 15) . "</i></td>\n";
-		print "<td class=\"". age_class($pr->{'commit'}{'age'}) . "\">" .
-		      $pr->{'commit'}{'age_string'} . "</td>\n" .
-		      "<td class=\"link\">" .
-		      $cgi->a({-href => "$my_uri?" . esc_param("p=$pr->{'path'};a=summary")}, "summary")   . " | " .
-		      $cgi->a({-href => "$my_uri?" . esc_param("p=$pr->{'path'};a=shortlog")}, "shortlog") . " | " .
-		      $cgi->a({-href => "$my_uri?" . esc_param("p=$pr->{'path'};a=log")}, "log") .
-		      "</td>\n" .
-		      "</tr>\n";
+
+		my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
+		# quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
+		$path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
+		$owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
+		$path  =~ s/ /\+/g;
+		$owner =~ s/ /\+/g;
+
+		print "$path $owner\n";
 	}
-	print "</table>\n";
-	git_footer_html();
 }
 
 sub git_summary {
 	my $descr = git_get_project_description($project) || "none";
-	my $head = git_get_head_hash($project);
-	my %co = parse_commit($head);
+	my %co = parse_commit("HEAD");
 	my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
+	my $head = $co{'id'};
 
 	my $owner = git_get_project_owner($project);
 
 	my $refs = git_get_references();
+	# These get_*_list functions return one more to allow us to see if
+	# there are more ...
+	my @taglist  = git_get_tags_list(16);
+	my @headlist = git_get_heads_list(16);
+	my @forklist;
+	my ($check_forks) = gitweb_check_feature('forks');
+
+	if ($check_forks) {
+		@forklist = git_get_projects_list($project);
+	}
+
 	git_header_html();
 	git_print_page_nav('summary','', $head);
 
@@ -1720,28 +3060,44 @@ sub git_summary {
 	}
 	print "</table>\n";
 
-	open my $fd, "-|", $GIT, "rev-list", "--max-count=17", git_get_head_hash($project)
-		or die_error(undef, "Open git-rev-list failed");
-	my @revlist = map { chomp; $_ } <$fd>;
-	close $fd;
+	if (-s "$projectroot/$project/README.html") {
+		if (open my $fd, "$projectroot/$project/README.html") {
+			print "<div class=\"title\">readme</div>\n";
+			print $_ while (<$fd>);
+			close $fd;
+		}
+	}
+
+	# we need to request one more than 16 (0..15) to check if
+	# those 16 are all
+	my @commitlist = parse_commits($head, 17);
 	git_print_header_div('shortlog');
-	git_shortlog_body(\@revlist, 0, 15, $refs,
+	git_shortlog_body(\@commitlist, 0, 15, $refs,
+	                  $#commitlist <=  15 ? undef :
 	                  $cgi->a({-href => href(action=>"shortlog")}, "..."));
 
-	my $taglist = git_get_refs_list("refs/tags");
-	if (defined @$taglist) {
+	if (@taglist) {
 		git_print_header_div('tags');
-		git_tags_body($taglist, 0, 15,
+		git_tags_body(\@taglist, 0, 15,
+		              $#taglist <=  15 ? undef :
 		              $cgi->a({-href => href(action=>"tags")}, "..."));
 	}
 
-	my $headlist = git_get_refs_list("refs/heads");
-	if (defined @$headlist) {
+	if (@headlist) {
 		git_print_header_div('heads');
-		git_heads_body($headlist, $head, 0, 15,
+		git_heads_body(\@headlist, $head, 0, 15,
+		               $#headlist <= 15 ? undef :
 		               $cgi->a({-href => href(action=>"heads")}, "..."));
 	}
 
+	if (@forklist) {
+		git_print_header_div('forks');
+		git_project_list_body(\@forklist, undef, 0, 15,
+		                      $#forklist <= 15 ? undef :
+		                      $cgi->a({-href => href(action=>"forks")}, "..."),
+				      'noheader');
+	}
+
 	git_footer_html();
 }
 
@@ -1755,20 +3111,25 @@ sub git_tag {
 	      "<table cellspacing=\"0\">\n" .
 	      "<tr>\n" .
 	      "<td>object</td>\n" .
-	      "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})}, $tag{'object'}) . "</td>\n" .
-	      "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})}, $tag{'type'}) . "</td>\n" .
+	      "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
+	                       $tag{'object'}) . "</td>\n" .
+	      "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
+	                                      $tag{'type'}) . "</td>\n" .
 	      "</tr>\n";
 	if (defined($tag{'author'})) {
 		my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
 		print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
-		print "<tr><td></td><td>" . $ad{'rfc2822'} . sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) . "</td></tr>\n";
+		print "<tr><td></td><td>" . $ad{'rfc2822'} .
+			sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
+			"</td></tr>\n";
 	}
 	print "</table>\n\n" .
 	      "</div>\n";
 	print "<div class=\"page_body\">";
 	my $comment = $tag{'comment'};
 	foreach my $line (@$comment) {
-		print esc_html($line) . "<br/>\n";
+		chomp $line;
+		print esc_html($line, -nbsp=>1) . "<br/>\n";
 	}
 	print "</div>\n";
 	git_footer_html();
@@ -1777,7 +3138,11 @@ sub git_tag {
 sub git_blame2 {
 	my $fd;
 	my $ftype;
-	die_error(undef, "Permission denied") if (!git_get_project_config_bool ('blame'));
+
+	my ($have_blame) = gitweb_check_feature('blame');
+	if (!$have_blame) {
+		die_error('403 Permission denied', "Permission denied");
+	}
 	die_error('404 Not Found', "File name not defined") if (!$file_name);
 	$hash_base ||= git_get_head_hash($project);
 	die_error(undef, "Couldn't find base commit") unless ($hash_base);
@@ -1791,51 +3156,100 @@ sub git_blame2 {
 	if ($ftype !~ "blob") {
 		die_error("400 Bad Request", "Object is not a blob");
 	}
-	open ($fd, "-|", $GIT, "blame", '-l', $file_name, $hash_base)
+	open ($fd, "-|", git_cmd(), "blame", '-p', '--',
+	      $file_name, $hash_base)
 		or die_error(undef, "Open git-blame failed");
 	git_header_html();
 	my $formats_nav =
-		$cgi->a({-href => href(action=>"blobl", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)}, "blob") .
-		" | " . $cgi->a({-href => href(action=>"blame", file_name=>$file_name)}, "head");
+		$cgi->a({-href => href(action=>"blob", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
+		        "blob") .
+		" | " .
+		$cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
+			"history") .
+		" | " .
+		$cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
+		        "HEAD");
 	git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
 	git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
-	git_print_page_path($file_name, $ftype);
+	git_print_page_path($file_name, $ftype, $hash_base);
 	my @rev_color = (qw(light2 dark2));
 	my $num_colors = scalar(@rev_color);
 	my $current_color = 0;
 	my $last_rev;
-	print "<div class=\"page_body\">\n";
-	print "<table class=\"blame\">\n";
-	print "<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n";
-	while (<$fd>) {
-		/^([0-9a-fA-F]{40}).*?(\d+)\)\s{1}(\s*.*)/;
-		my $full_rev = $1;
+	print <<HTML;
+<div class="page_body">
+<table class="blame">
+<tr><th>Commit</th><th>Line</th><th>Data</th></tr>
+HTML
+	my %metainfo = ();
+	while (1) {
+		$_ = <$fd>;
+		last unless defined $_;
+		my ($full_rev, $orig_lineno, $lineno, $group_size) =
+		    /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/;
+		if (!exists $metainfo{$full_rev}) {
+			$metainfo{$full_rev} = {};
+		}
+		my $meta = $metainfo{$full_rev};
+		while (<$fd>) {
+			last if (s/^\t//);
+			if (/^(\S+) (.*)$/) {
+				$meta->{$1} = $2;
+			}
+		}
+		my $data = $_;
+		chomp $data;
 		my $rev = substr($full_rev, 0, 8);
-		my $lineno = $2;
-		my $data = $3;
-
-		if (!defined $last_rev) {
-			$last_rev = $full_rev;
-		} elsif ($last_rev ne $full_rev) {
-			$last_rev = $full_rev;
+		my $author = $meta->{'author'};
+		my %date = parse_date($meta->{'author-time'},
+				      $meta->{'author-tz'});
+		my $date = $date{'iso-tz'};
+		if ($group_size) {
 			$current_color = ++$current_color % $num_colors;
 		}
 		print "<tr class=\"$rev_color[$current_color]\">\n";
-		print "<td class=\"sha1\">" .
-			$cgi->a({-href => href(action=>"commit", hash=>$full_rev, file_name=>$file_name)}, esc_html($rev)) . "</td>\n";
-		print "<td class=\"linenr\"><a id=\"l$lineno\" href=\"#l$lineno\" class=\"linenr\">" . esc_html($lineno) . "</a></td>\n";
+		if ($group_size) {
+			print "<td class=\"sha1\"";
+			print " title=\"". esc_html($author) . ", $date\"";
+			print " rowspan=\"$group_size\"" if ($group_size > 1);
+			print ">";
+			print $cgi->a({-href => href(action=>"commit",
+						     hash=>$full_rev,
+						     file_name=>$file_name)},
+				      esc_html($rev));
+			print "</td>\n";
+		}
+		open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
+			or die_error("could not open git-rev-parse");
+		my $parent_commit = <$dd>;
+		close $dd;
+		chomp($parent_commit);
+		my $blamed = href(action => 'blame',
+				  file_name => $meta->{'filename'},
+				  hash_base => $parent_commit);
+		print "<td class=\"linenr\">";
+		print $cgi->a({ -href => "$blamed#l$orig_lineno",
+				-id => "l$lineno",
+				-class => "linenr" },
+			      esc_html($lineno));
+		print "</td>";
 		print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
 		print "</tr>\n";
 	}
 	print "</table>\n";
 	print "</div>";
-	close $fd or print "Reading blob failed\n";
+	close $fd
+		or print "Reading blob failed\n";
 	git_footer_html();
 }
 
 sub git_blame {
 	my $fd;
-	die_error('403 Permission denied', "Permission denied") if (!git_get_project_config_bool ('blame'));
+
+	my ($have_blame) = gitweb_check_feature('blame');
+	if (!$have_blame) {
+		die_error('403 Permission denied', "Permission denied");
+	}
 	die_error('404 Not Found', "File name not defined") if (!$file_name);
 	$hash_base ||= git_get_head_hash($project);
 	die_error(undef, "Couldn't find base commit") unless ($hash_base);
@@ -1845,15 +3259,21 @@ sub git_blame {
 		$hash = git_get_hash_by_path($hash_base, $file_name, "blob")
 			or die_error(undef, "Error lookup file");
 	}
-	open ($fd, "-|", $GIT, "annotate", '-l', '-t', '-r', $file_name, $hash_base)
+	open ($fd, "-|", git_cmd(), "annotate", '-l', '-t', '-r', $file_name, $hash_base)
 		or die_error(undef, "Open git-annotate failed");
 	git_header_html();
 	my $formats_nav =
-		$cgi->a({-href => href(action=>"blobl", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)}, "blob") .
-		" | " . $cgi->a({-href => href(action=>"blame", file_name=>$file_name)}, "head");
+		$cgi->a({-href => href(action=>"blob", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
+		        "blob") .
+		" | " .
+		$cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
+			"history") .
+		" | " .
+		$cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
+		        "HEAD");
 	git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
 	git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
-	git_print_page_path($file_name, 'blob');
+	git_print_page_path($file_name, 'blob', $hash_base);
 	print "<div class=\"page_body\">\n";
 	print <<HTML;
 <table class="blame">
@@ -1882,7 +3302,7 @@ HTML
 		chomp $line;
 		$line_class_num = ($line_class_num + 1) % $line_class_len;
 
-		if ($line =~ m/^([0-9a-fA-F]{40})\t\(\s*([^\t]+)\t(\d+) \+\d\d\d\d\t(\d+)\)(.*)$/) {
+		if ($line =~ m/^([0-9a-fA-F]{40})\t\(\s*([^\t]+)\t(\d+) [+-]\d\d\d\d\t(\d+)\)(.*)$/) {
 			$long_rev = $1;
 			$author   = $2;
 			$time     = $3;
@@ -1914,7 +3334,8 @@ HTML
 HTML
 	} # while (my $line = <$fd>)
 	print "</table>\n\n";
-	close $fd or print "Reading blob failed.\n";
+	close $fd
+		or print "Reading blob failed.\n";
 	print "</div>";
 	git_footer_html();
 }
@@ -1925,9 +3346,9 @@ sub git_tags {
 	git_print_page_nav('','', $head,undef,$head);
 	git_print_header_div('summary', $project);
 
-	my $taglist = git_get_refs_list("refs/tags");
-	if (defined @$taglist) {
-		git_tags_body($taglist);
+	my @tagslist = git_get_tags_list();
+	if (@tagslist) {
+		git_tags_body(\@tagslist);
 	}
 	git_footer_html();
 }
@@ -1938,14 +3359,16 @@ sub git_heads {
 	git_print_page_nav('','', $head,undef,$head);
 	git_print_header_div('summary', $project);
 
-	my $taglist = git_get_refs_list("refs/heads");
-	if (defined @$taglist) {
-		git_heads_body($taglist, $head);
+	my @headslist = git_get_heads_list();
+	if (@headslist) {
+		git_heads_body(\@headslist, $head);
 	}
 	git_footer_html();
 }
 
 sub git_blob_plain {
+	my $expires;
+
 	if (!defined $hash) {
 		if (defined $file_name) {
 			my $base = $hash_base || git_get_head_hash($project);
@@ -1954,9 +3377,13 @@ sub git_blob_plain {
 		} else {
 			die_error(undef, "No file name defined");
 		}
+	} elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
+		# blobs defined by non-textual hash id's can be cached
+		$expires = "+1d";
 	}
+
 	my $type = shift;
-	open my $fd, "-|", $GIT, "cat-file", "blob", $hash
+	open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
 		or die_error(undef, "Couldn't cat $file_name, $hash");
 
 	$type ||= blob_mimetype($fd, $file_name);
@@ -1969,7 +3396,10 @@ sub git_blob_plain {
 		$save_as .= '.txt';
 	}
 
-	print $cgi->header(-type => "$type", '-content-disposition' => "inline; filename=\"$save_as\"");
+	print $cgi->header(
+		-type => "$type",
+		-expires=>$expires,
+		-content_disposition => 'inline; filename="' . "$save_as" . '"');
 	undef $/;
 	binmode STDOUT, ':raw';
 	print <$fd>;
@@ -1979,6 +3409,8 @@ sub git_blob_plain {
 }
 
 sub git_blob {
+	my $expires;
+
 	if (!defined $hash) {
 		if (defined $file_name) {
 			my $base = $hash_base || git_get_head_hash($project);
@@ -1987,27 +3419,48 @@ sub git_blob {
 		} else {
 			die_error(undef, "No file name defined");
 		}
+	} elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
+		# blobs defined by non-textual hash id's can be cached
+		$expires = "+1d";
 	}
-	my $have_blame = git_get_project_config_bool ('blame');
-	open my $fd, "-|", $GIT, "cat-file", "blob", $hash
+
+	my ($have_blame) = gitweb_check_feature('blame');
+	open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
 		or die_error(undef, "Couldn't cat $file_name, $hash");
 	my $mimetype = blob_mimetype($fd, $file_name);
-	if ($mimetype !~ m/^text\//) {
+	if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)!) {
 		close $fd;
 		return git_blob_plain($mimetype);
 	}
-	git_header_html();
+	# we can have blame only for text/* mimetype
+	$have_blame &&= ($mimetype =~ m!^text/!);
+
+	git_header_html(undef, $expires);
 	my $formats_nav = '';
 	if (defined $hash_base && (my %co = parse_commit($hash_base))) {
 		if (defined $file_name) {
 			if ($have_blame) {
-				$formats_nav .= $cgi->a({-href => href(action=>"blame", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)}, "blame") . " | ";
+				$formats_nav .=
+					$cgi->a({-href => href(action=>"blame", hash_base=>$hash_base,
+					                       hash=>$hash, file_name=>$file_name)},
+					        "blame") .
+					" | ";
 			}
 			$formats_nav .=
-				$cgi->a({-href => href(action=>"blob_plain", hash=>$hash, file_name=>$file_name)}, "plain") .
-				" | " . $cgi->a({-href => href(action=>"blob", hash_base=>"HEAD", file_name=>$file_name)}, "head");
+				$cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
+				                       hash=>$hash, file_name=>$file_name)},
+				        "history") .
+				" | " .
+				$cgi->a({-href => href(action=>"blob_plain",
+				                       hash=>$hash, file_name=>$file_name)},
+				        "raw") .
+				" | " .
+				$cgi->a({-href => href(action=>"blob",
+				                       hash_base=>"HEAD", file_name=>$file_name)},
+				        "HEAD");
 		} else {
-			$formats_nav .= $cgi->a({-href => href(action=>"blob_plain", hash=>$hash)}, "plain");
+			$formats_nav .=
+				$cgi->a({-href => href(action=>"blob_plain", hash=>$hash)}, "raw");
 		}
 		git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
 		git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
@@ -2016,33 +3469,48 @@ sub git_blob {
 		      "<br/><br/></div>\n" .
 		      "<div class=\"title\">$hash</div>\n";
 	}
-	git_print_page_path($file_name, "blob");
+	git_print_page_path($file_name, "blob", $hash_base);
 	print "<div class=\"page_body\">\n";
-	my $nr;
-	while (my $line = <$fd>) {
-		chomp $line;
-		$nr++;
-		$line = untabify($line);
-		printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n", $nr, $nr, $nr, esc_html($line);
+	if ($mimetype =~ m!^text/!) {
+		my $nr;
+		while (my $line = <$fd>) {
+			chomp $line;
+			$nr++;
+			$line = untabify($line);
+			printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
+			       $nr, $nr, $nr, esc_html($line, -nbsp=>1);
+		}
+	} elsif ($mimetype =~ m!^image/!) {
+		print qq!<img type="$mimetype"!;
+		if ($file_name) {
+			print qq! alt="$file_name" title="$file_name"!;
+		}
+		print qq! src="! .
+		      href(action=>"blob_plain", hash=>$hash,
+		           hash_base=>$hash_base, file_name=>$file_name) .
+		      qq!" />\n!;
 	}
-	close $fd or print "Reading blob failed.\n";
+	close $fd
+		or print "Reading blob failed.\n";
 	print "</div>";
 	git_footer_html();
 }
 
 sub git_tree {
+	my $have_snapshot = gitweb_have_snapshot();
+
+	if (!defined $hash_base) {
+		$hash_base = "HEAD";
+	}
 	if (!defined $hash) {
-		$hash = git_get_head_hash($project);
 		if (defined $file_name) {
-			my $base = $hash_base || $hash;
-			$hash = git_get_hash_by_path($base, $file_name, "tree");
-		}
-		if (!defined $hash_base) {
-			$hash_base = $hash;
+			$hash = git_get_hash_by_path($hash_base, $file_name, "tree");
+		} else {
+			$hash = $hash_base;
 		}
 	}
 	$/ = "\0";
-	open my $fd, "-|", $GIT, "ls-tree", '-z', $hash
+	open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
 		or die_error(undef, "Open git-ls-tree failed");
 	my @entries = map { chomp; $_ } <$fd>;
 	close $fd or die_error(undef, "Reading tree failed");
@@ -2051,60 +3519,79 @@ sub git_tree {
 	my $refs = git_get_references();
 	my $ref = format_ref_marker($refs, $hash_base);
 	git_header_html();
-	my $base_key = "";
-	my $base = "";
-	my $have_blame = git_get_project_config_bool ('blame');
+	my $basedir = '';
+	my ($have_blame) = gitweb_check_feature('blame');
 	if (defined $hash_base && (my %co = parse_commit($hash_base))) {
-		$base_key = ";hb=$hash_base";
-		git_print_page_nav('tree','', $hash_base);
+		my @views_nav = ();
+		if (defined $file_name) {
+			push @views_nav,
+				$cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
+				                       hash=>$hash, file_name=>$file_name)},
+				        "history"),
+				$cgi->a({-href => href(action=>"tree",
+				                       hash_base=>"HEAD", file_name=>$file_name)},
+				        "HEAD"),
+		}
+		if ($have_snapshot) {
+			# FIXME: Should be available when we have no hash base as well.
+			push @views_nav,
+				$cgi->a({-href => href(action=>"snapshot", hash=>$hash)},
+				        "snapshot");
+		}
+		git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
 		git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
 	} else {
+		undef $hash_base;
 		print "<div class=\"page_nav\">\n";
 		print "<br/><br/></div>\n";
 		print "<div class=\"title\">$hash</div>\n";
 	}
 	if (defined $file_name) {
-		$base = esc_html("$file_name/");
+		$basedir = $file_name;
+		if ($basedir ne '' && substr($basedir, -1) ne '/') {
+			$basedir .= '/';
+		}
 	}
-	git_print_page_path($file_name, 'tree');
+	git_print_page_path($file_name, 'tree', $hash_base);
 	print "<div class=\"page_body\">\n";
 	print "<table cellspacing=\"0\">\n";
-	my $alternate = 0;
-	foreach my $line (@entries) {
-		#'100644	blob	0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa	panic.c'
-		$line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/;
-		my $t_mode = $1;
-		my $t_type = $2;
-		my $t_hash = $3;
-		my $t_name = validate_input($4);
+	my $alternate = 1;
+	# '..' (top directory) link if possible
+	if (defined $hash_base &&
+	    defined $file_name && $file_name =~ m![^/]+$!) {
 		if ($alternate) {
 			print "<tr class=\"dark\">\n";
 		} else {
 			print "<tr class=\"light\">\n";
 		}
 		$alternate ^= 1;
-		print "<td class=\"mode\">" . mode_str($t_mode) . "</td>\n";
-		if ($t_type eq "blob") {
-			print "<td class=\"list\">" .
-			      $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blob;h=$t_hash$base_key;f=$base$t_name"), -class => "list"}, esc_html($t_name)) .
-			      "</td>\n" .
-			      "<td class=\"link\">" .
-			      $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blob;h=$t_hash$base_key;f=$base$t_name")}, "blob");
-			if ($have_blame) {
-				print " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blame;h=$t_hash$base_key;f=$base$t_name")}, "blame");
-			}
-			print " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=history;h=$t_hash;hb=$hash_base;f=$base$t_name")}, "history") .
-			      " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blob_plain;h=$t_hash;f=$base$t_name")}, "raw") .
-			      "</td>\n";
-		} elsif ($t_type eq "tree") {
-			print "<td class=\"list\">" .
-			      $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=tree;h=$t_hash$base_key;f=$base$t_name")}, esc_html($t_name)) .
-			      "</td>\n" .
-			      "<td class=\"link\">" .
-			      $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=tree;h=$t_hash$base_key;f=$base$t_name")}, "tree") .
-			      " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=history;hb=$hash_base;f=$base$t_name")}, "history") .
-			      "</td>\n";
+
+		my $up = $file_name;
+		$up =~ s!/?[^/]+$!!;
+		undef $up unless $up;
+		# based on git_print_tree_entry
+		print '<td class="mode">' . mode_str('040000') . "</td>\n";
+		print '<td class="list">';
+		print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
+		                             file_name=>$up)},
+		              "..");
+		print "</td>\n";
+		print "<td class=\"link\"></td>\n";
+
+		print "</tr>\n";
+	}
+	foreach my $line (@entries) {
+		my %t = parse_ls_tree_line($line, -z => 1);
+
+		if ($alternate) {
+			print "<tr class=\"dark\">\n";
+		} else {
+			print "<tr class=\"light\">\n";
 		}
+		$alternate ^= 1;
+
+		git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
+
 		print "</tr>\n";
 	}
 	print "</table>\n" .
@@ -2112,6 +3599,37 @@ sub git_tree {
 	git_footer_html();
 }
 
+sub git_snapshot {
+	my ($ctype, $suffix, $command) = gitweb_check_feature('snapshot');
+	my $have_snapshot = (defined $ctype && defined $suffix);
+	if (!$have_snapshot) {
+		die_error('403 Permission denied', "Permission denied");
+	}
+
+	if (!defined $hash) {
+		$hash = git_get_head_hash($project);
+	}
+
+	my $filename = basename($project) . "-$hash.tar.$suffix";
+
+	print $cgi->header(
+		-type => "application/$ctype",
+		-content_disposition => 'inline; filename="' . "$filename" . '"',
+		-status => '200 OK');
+
+	my $git = git_cmd_str();
+	my $name = $project;
+	$name =~ s/\047/\047\\\047\047/g;
+	open my $fd, "-|",
+	"$git archive --format=tar --prefix=\'$name\'/ $hash | $command"
+		or die_error(undef, "Execute git-tar-tree failed.");
+	binmode STDOUT, ':raw';
+	print <$fd>;
+	binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
+	close $fd;
+
+}
+
 sub git_log {
 	my $head = git_get_head_hash($project);
 	if (!defined $hash) {
@@ -2122,28 +3640,25 @@ sub git_log {
 	}
 	my $refs = git_get_references();
 
-	my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
-	open my $fd, "-|", $GIT, "rev-list", $limit, $hash
-		or die_error(undef, "Open git-rev-list failed");
-	my @revlist = map { chomp; $_ } <$fd>;
-	close $fd;
+	my @commitlist = parse_commits($hash, 101, (100 * $page));
 
-	my $paging_nav = format_paging_nav('log', $hash, $head, $page, $#revlist);
+	my $paging_nav = format_paging_nav('log', $hash, $head, $page, (100 * ($page+1)));
 
 	git_header_html();
 	git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
 
-	if (!@revlist) {
+	if (!@commitlist) {
 		my %co = parse_commit($hash);
 
 		git_print_header_div('summary', $project);
 		print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
 	}
-	for (my $i = ($page * 100); $i <= $#revlist; $i++) {
-		my $commit = $revlist[$i];
-		my $ref = format_ref_marker($refs, $commit);
-		my %co = parse_commit($commit);
+	my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
+	for (my $i = 0; $i <= $to; $i++) {
+		my %co = %{$commitlist[$i]};
 		next if !%co;
+		my $commit = $co{'id'};
+		my $ref = format_ref_marker($refs, $commit);
 		my %ad = parse_date($co{'author_epoch'});
 		git_print_header_div('commit',
 		               "<span class=\"age\">$co{'age_string'}</span>" .
@@ -2152,37 +3667,30 @@ sub git_log {
 		print "<div class=\"title_text\">\n" .
 		      "<div class=\"log_link\">\n" .
 		      $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
-		      " | " . $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
+		      " | " .
+		      $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
+		      " | " .
+		      $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
 		      "<br/>\n" .
 		      "</div>\n" .
 		      "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
-		      "</div>\n" .
-		      "<div class=\"log_body\">\n";
-		my $comment = $co{'comment'};
-		my $empty = 0;
-		foreach my $line (@$comment) {
-			if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
-				next;
-			}
-			if ($line eq "") {
-				if ($empty) {
-					next;
-				}
-				$empty = 1;
-			} else {
-				$empty = 0;
-			}
-			print format_log_line_html($line) . "<br/>\n";
-		}
-		if (!$empty) {
-			print "<br/>\n";
-		}
+		      "</div>\n";
+
+		print "<div class=\"log_body\">\n";
+		git_print_log($co{'comment'}, -final_empty_line=> 1);
+		print "</div>\n";
+	}
+	if ($#commitlist >= 100) {
+		print "<div class=\"page_nav\">\n";
+		print $cgi->a({-href => href(action=>"log", hash=>$hash, page=>$page+1),
+			       -accesskey => "n", -title => "Alt-n"}, "next");
 		print "</div>\n";
 	}
 	git_footer_html();
 }
 
 sub git_commit {
+	$hash ||= $hash_base || "HEAD";
 	my %co = parse_commit($hash);
 	if (!%co) {
 		die_error(undef, "Unknown commit object");
@@ -2190,14 +3698,46 @@ sub git_commit {
 	my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
 	my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
 
-	my $parent = $co{'parent'};
+	my $parent  = $co{'parent'};
+	my $parents = $co{'parents'}; # listref
+
+	# we need to prepare $formats_nav before any parameter munging
+	my $formats_nav;
+	if (!defined $parent) {
+		# --root commitdiff
+		$formats_nav .= '(initial)';
+	} elsif (@$parents == 1) {
+		# single parent commit
+		$formats_nav .=
+			'(parent: ' .
+			$cgi->a({-href => href(action=>"commit",
+			                       hash=>$parent)},
+			        esc_html(substr($parent, 0, 7))) .
+			')';
+	} else {
+		# merge commit
+		$formats_nav .=
+			'(merge: ' .
+			join(' ', map {
+				$cgi->a({-href => href(action=>"commitdiff",
+				                       hash=>$_)},
+				        esc_html(substr($_, 0, 7)));
+			} @$parents ) .
+			')';
+	}
+
 	if (!defined $parent) {
 		$parent = "--root";
 	}
-	open my $fd, "-|", $GIT, "diff-tree", '-r', '-M', $parent, $hash
-		or die_error(undef, "Open git-diff-tree failed");
-	my @difftree = map { chomp; $_ } <$fd>;
-	close $fd or die_error(undef, "Reading git-diff-tree failed");
+	my @difftree;
+	if (@$parents <= 1) {
+		# difftree output is not printed for merges
+		open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
+			@diff_opts, $parent, $hash, "--"
+				or die_error(undef, "Open git-diff-tree failed");
+		@difftree = map { chomp; $_ } <$fd>;
+		close $fd or die_error(undef, "Reading git-diff-tree failed");
+	}
 
 	# non-textual hash id's can be cached
 	my $expires;
@@ -2206,15 +3746,13 @@ sub git_commit {
 	}
 	my $refs = git_get_references();
 	my $ref = format_ref_marker($refs, $co{'id'});
-	my $formats_nav = '';
-	if (defined $file_name && defined $co{'parent'}) {
-		my $parent = $co{'parent'};
-		$formats_nav .= $cgi->a({-href => href(action=>"blame", hash_parent=>$parent, file_name=>$file_name)}, "blame");
-	}
+
+	my $have_snapshot = gitweb_have_snapshot();
+
 	git_header_html(undef, $expires);
-	git_print_page_nav('commit', defined $co{'parent'} ? '' : 'commitdiff',
-	             $hash, $co{'tree'}, $hash,
-	             $formats_nav);
+	git_print_page_nav('commit', '',
+	                   $hash, $co{'tree'}, $hash,
+	                   $formats_nav);
 
 	if (defined $co{'parent'}) {
 		git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
@@ -2227,281 +3765,503 @@ sub git_commit {
 	      "<tr>" .
 	      "<td></td><td> $ad{'rfc2822'}";
 	if ($ad{'hour_local'} < 6) {
-		printf(" (<span class=\"atnight\">%02d:%02d</span> %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
+		printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
+		       $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
 	} else {
-		printf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
+		printf(" (%02d:%02d %s)",
+		       $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
 	}
 	print "</td>" .
 	      "</tr>\n";
 	print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
-	print "<tr><td></td><td> $cd{'rfc2822'}" . sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) . "</td></tr>\n";
+	print "<tr><td></td><td> $cd{'rfc2822'}" .
+	      sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
+	      "</td></tr>\n";
 	print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
 	print "<tr>" .
 	      "<td>tree</td>" .
 	      "<td class=\"sha1\">" .
-	      $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash), class => "list"}, $co{'tree'}) .
-	      "</td>" .
-	      "<td class=\"link\">" . $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)}, "tree") .
+	      $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
+	               class => "list"}, $co{'tree'}) .
 	      "</td>" .
+	      "<td class=\"link\">" .
+	      $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
+	              "tree");
+	if ($have_snapshot) {
+		print " | " .
+		      $cgi->a({-href => href(action=>"snapshot", hash=>$hash)}, "snapshot");
+	}
+	print "</td>" .
 	      "</tr>\n";
-	my $parents = $co{'parents'};
+
 	foreach my $par (@$parents) {
 		print "<tr>" .
 		      "<td>parent</td>" .
-		      "<td class=\"sha1\">" . $cgi->a({-href => href(action=>"commit", hash=>$par), class => "list"}, $par) . "</td>" .
+		      "<td class=\"sha1\">" .
+		      $cgi->a({-href => href(action=>"commit", hash=>$par),
+		               class => "list"}, $par) .
+		      "</td>" .
 		      "<td class=\"link\">" .
 		      $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
-		      " | " . $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "commitdiff") .
+		      " | " .
+		      $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
 		      "</td>" .
 		      "</tr>\n";
 	}
 	print "</table>".
 	      "</div>\n";
+
 	print "<div class=\"page_body\">\n";
-	my $comment = $co{'comment'};
-	my $empty = 0;
-	my $signed = 0;
-	foreach my $line (@$comment) {
-		# print only one empty line
-		if ($line eq "") {
-			if ($empty || $signed) {
-				next;
+	git_print_log($co{'comment'});
+	print "</div>\n";
+
+	if (@$parents <= 1) {
+		# do not output difftree/whatchanged for merges
+		git_difftree_body(\@difftree, $hash, $parent);
+	}
+
+	git_footer_html();
+}
+
+sub git_object {
+	# object is defined by:
+	# - hash or hash_base alone
+	# - hash_base and file_name
+	my $type;
+
+	# - hash or hash_base alone
+	if ($hash || ($hash_base && !defined $file_name)) {
+		my $object_id = $hash || $hash_base;
+
+		my $git_command = git_cmd_str();
+		open my $fd, "-|", "$git_command cat-file -t $object_id 2>/dev/null"
+			or die_error('404 Not Found', "Object does not exist");
+		$type = <$fd>;
+		chomp $type;
+		close $fd
+			or die_error('404 Not Found', "Object does not exist");
+
+	# - hash_base and file_name
+	} elsif ($hash_base && defined $file_name) {
+		$file_name =~ s,/+$,,;
+
+		system(git_cmd(), "cat-file", '-e', $hash_base) == 0
+			or die_error('404 Not Found', "Base object does not exist");
+
+		# here errors should not hapen
+		open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
+			or die_error(undef, "Open git-ls-tree failed");
+		my $line = <$fd>;
+		close $fd;
+
+		#'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa	panic.c'
+		unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
+			die_error('404 Not Found', "File or directory for given base does not exist");
+		}
+		$type = $2;
+		$hash = $3;
+	} else {
+		die_error('404 Not Found', "Not enough information to find object");
+	}
+
+	print $cgi->redirect(-uri => href(action=>$type, -full=>1,
+	                                  hash=>$hash, hash_base=>$hash_base,
+	                                  file_name=>$file_name),
+	                     -status => '302 Found');
+}
+
+sub git_blobdiff {
+	my $format = shift || 'html';
+
+	my $fd;
+	my @difftree;
+	my %diffinfo;
+	my $expires;
+
+	# preparing $fd and %diffinfo for git_patchset_body
+	# new style URI
+	if (defined $hash_base && defined $hash_parent_base) {
+		if (defined $file_name) {
+			# read raw output
+			open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
+				$hash_parent_base, $hash_base,
+				"--", $file_name
+				or die_error(undef, "Open git-diff-tree failed");
+			@difftree = map { chomp; $_ } <$fd>;
+			close $fd
+				or die_error(undef, "Reading git-diff-tree failed");
+			@difftree
+				or die_error('404 Not Found', "Blob diff not found");
+
+		} elsif (defined $hash &&
+		         $hash =~ /[0-9a-fA-F]{40}/) {
+			# try to find filename from $hash
+
+			# read filtered raw output
+			open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
+				$hash_parent_base, $hash_base, "--"
+				or die_error(undef, "Open git-diff-tree failed");
+			@difftree =
+				# ':100644 100644 03b21826... 3b93d5e7... M	ls-files.c'
+				# $hash == to_id
+				grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
+				map { chomp; $_ } <$fd>;
+			close $fd
+				or die_error(undef, "Reading git-diff-tree failed");
+			@difftree
+				or die_error('404 Not Found', "Blob diff not found");
+
+		} else {
+			die_error('404 Not Found', "Missing one of the blob diff parameters");
+		}
+
+		if (@difftree > 1) {
+			die_error('404 Not Found', "Ambiguous blob diff specification");
+		}
+
+		%diffinfo = parse_difftree_raw_line($difftree[0]);
+		$file_parent ||= $diffinfo{'from_file'} || $file_name || $diffinfo{'file'};
+		$file_name   ||= $diffinfo{'to_file'}   || $diffinfo{'file'};
+
+		$hash_parent ||= $diffinfo{'from_id'};
+		$hash        ||= $diffinfo{'to_id'};
+
+		# non-textual hash id's can be cached
+		if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
+		    $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
+			$expires = '+1d';
+		}
+
+		# open patch output
+		open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
+			'-p', $hash_parent_base, $hash_base,
+			"--", $file_name
+			or die_error(undef, "Open git-diff-tree failed");
+	}
+
+	# old/legacy style URI
+	if (!%diffinfo && # if new style URI failed
+	    defined $hash && defined $hash_parent) {
+		# fake git-diff-tree raw output
+		$diffinfo{'from_mode'} = $diffinfo{'to_mode'} = "blob";
+		$diffinfo{'from_id'} = $hash_parent;
+		$diffinfo{'to_id'}   = $hash;
+		if (defined $file_name) {
+			if (defined $file_parent) {
+				$diffinfo{'status'} = '2';
+				$diffinfo{'from_file'} = $file_parent;
+				$diffinfo{'to_file'}   = $file_name;
+			} else { # assume not renamed
+				$diffinfo{'status'} = '1';
+				$diffinfo{'from_file'} = $file_name;
+				$diffinfo{'to_file'}   = $file_name;
 			}
-			$empty = 1;
+		} else { # no filename given
+			$diffinfo{'status'} = '2';
+			$diffinfo{'from_file'} = $hash_parent;
+			$diffinfo{'to_file'}   = $hash;
+		}
+
+		# non-textual hash id's can be cached
+		if ($hash =~ m/^[0-9a-fA-F]{40}$/ &&
+		    $hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
+			$expires = '+1d';
+		}
+
+		# open patch output
+		open $fd, "-|", git_cmd(), "diff", '-p', @diff_opts,
+			$hash_parent, $hash, "--"
+			or die_error(undef, "Open git-diff failed");
+	} else  {
+		die_error('404 Not Found', "Missing one of the blob diff parameters")
+			unless %diffinfo;
+	}
+
+	# header
+	if ($format eq 'html') {
+		my $formats_nav =
+			$cgi->a({-href => href(action=>"blobdiff_plain",
+			                       hash=>$hash, hash_parent=>$hash_parent,
+			                       hash_base=>$hash_base, hash_parent_base=>$hash_parent_base,
+			                       file_name=>$file_name, file_parent=>$file_parent)},
+			        "raw");
+		git_header_html(undef, $expires);
+		if (defined $hash_base && (my %co = parse_commit($hash_base))) {
+			git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
+			git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
 		} else {
-			$empty = 0;
+			print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
+			print "<div class=\"title\">$hash vs $hash_parent</div>\n";
 		}
-		if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
-			$signed = 1;
-			print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
+		if (defined $file_name) {
+			git_print_page_path($file_name, "blob", $hash_base);
 		} else {
-			$signed = 0;
-			print format_log_line_html($line) . "<br/>\n";
+			print "<div class=\"page_path\"></div>\n";
 		}
+
+	} elsif ($format eq 'plain') {
+		print $cgi->header(
+			-type => 'text/plain',
+			-charset => 'utf-8',
+			-expires => $expires,
+			-content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
+
+		print "X-Git-Url: " . $cgi->self_url() . "\n\n";
+
+	} else {
+		die_error(undef, "Unknown blobdiff format");
 	}
-	print "</div>\n";
 
-	git_difftree_body(\@difftree, $parent);
+	# patch
+	if ($format eq 'html') {
+		print "<div class=\"page_body\">\n";
 
-	git_footer_html();
-}
+		git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
+		close $fd;
+
+		print "</div>\n"; # class="page_body"
+		git_footer_html();
 
-sub git_blobdiff {
-	mkdir($git_temp, 0700);
-	git_header_html();
-	if (defined $hash_base && (my %co = parse_commit($hash_base))) {
-		my $formats_nav =
-			$cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blobdiff_plain;h=$hash;hp=$hash_parent")}, "plain");
-		git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
-		git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
 	} else {
-		print "<div class=\"page_nav\">\n" .
-		      "<br/><br/></div>\n" .
-		      "<div class=\"title\">$hash vs $hash_parent</div>\n";
-	}
-	git_print_page_path($file_name, "blob");
-	print "<div class=\"page_body\">\n" .
-	      "<div class=\"diff_info\">blob:" .
-	      $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blob;h=$hash_parent;hb=$hash_base;f=$file_name")}, $hash_parent) .
-	      " -> blob:" .
-	      $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blob;h=$hash;hb=$hash_base;f=$file_name")}, $hash) .
-	      "</div>\n";
-	git_diff_print($hash_parent, $file_name || $hash_parent, $hash, $file_name || $hash);
-	print "</div>";
-	git_footer_html();
+		while (my $line = <$fd>) {
+			$line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
+			$line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
+
+			print $line;
+
+			last if $line =~ m!^\+\+\+!;
+		}
+		local $/ = undef;
+		print <$fd>;
+		close $fd;
+	}
 }
 
 sub git_blobdiff_plain {
-	mkdir($git_temp, 0700);
-	print $cgi->header(-type => "text/plain", -charset => 'utf-8');
-	git_diff_print($hash_parent, $file_name || $hash_parent, $hash, $file_name || $hash, "plain");
+	git_blobdiff('plain');
 }
 
 sub git_commitdiff {
-	mkdir($git_temp, 0700);
+	my $format = shift || 'html';
+	$hash ||= $hash_base || "HEAD";
 	my %co = parse_commit($hash);
 	if (!%co) {
 		die_error(undef, "Unknown commit object");
 	}
-	if (!defined $hash_parent) {
-		$hash_parent = $co{'parent'} || '--root';
-	}
-	open my $fd, "-|", $GIT, "diff-tree", '-r', $hash_parent, $hash
-		or die_error(undef, "Open git-diff-tree failed");
-	my @difftree = map { chomp; $_ } <$fd>;
-	close $fd or die_error(undef, "Reading git-diff-tree failed");
 
-	# non-textual hash id's can be cached
-	my $expires;
-	if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
-		$expires = "+1d";
-	}
-	my $refs = git_get_references();
-	my $ref = format_ref_marker($refs, $co{'id'});
-	my $formats_nav =
-		$cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commitdiff_plain;h=$hash;hp=$hash_parent")}, "plain");
-	git_header_html(undef, $expires);
-	git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
-	git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
-	print "<div class=\"page_body\">\n";
-	my $comment = $co{'comment'};
-	my $empty = 0;
-	my $signed = 0;
-	my @log = @$comment;
-	# remove first and empty lines after that
-	shift @log;
-	while (defined $log[0] && $log[0] eq "") {
-		shift @log;
-	}
-	foreach my $line (@log) {
-		if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
-			next;
-		}
-		if ($line eq "") {
-			if ($empty) {
-				next;
+	# we need to prepare $formats_nav before any parameter munging
+	my $formats_nav;
+	if ($format eq 'html') {
+		$formats_nav =
+			$cgi->a({-href => href(action=>"commitdiff_plain",
+			                       hash=>$hash, hash_parent=>$hash_parent)},
+			        "raw");
+
+		if (defined $hash_parent) {
+			# commitdiff with two commits given
+			my $hash_parent_short = $hash_parent;
+			if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
+				$hash_parent_short = substr($hash_parent, 0, 7);
 			}
-			$empty = 1;
+			$formats_nav .=
+				' (from: ' .
+				$cgi->a({-href => href(action=>"commitdiff",
+				                       hash=>$hash_parent)},
+				        esc_html($hash_parent_short)) .
+				')';
+		} elsif (!$co{'parent'}) {
+			# --root commitdiff
+			$formats_nav .= ' (initial)';
+		} elsif (scalar @{$co{'parents'}} == 1) {
+			# single parent commit
+			$formats_nav .=
+				' (parent: ' .
+				$cgi->a({-href => href(action=>"commitdiff",
+				                       hash=>$co{'parent'})},
+				        esc_html(substr($co{'parent'}, 0, 7))) .
+				')';
 		} else {
-			$empty = 0;
-		}
-		print format_log_line_html($line) . "<br/>\n";
-	}
-	print "<br/>\n";
-	foreach my $line (@difftree) {
-		# ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M      ls-files.c'
-		# ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M      rev-tree.c'
-		if ($line !~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)\t(.*)$/) {
-			next;
-		}
-		my $from_mode = $1;
-		my $to_mode = $2;
-		my $from_id = $3;
-		my $to_id = $4;
-		my $status = $5;
-		my $file = validate_input(unquote($6));
-		if ($status eq "A") {
-			print "<div class=\"diff_info\">" . file_type($to_mode) . ":" .
-			      $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blob;h=$to_id;hb=$hash;f=$file")}, $to_id) . "(new)" .
-			      "</div>\n";
-			git_diff_print(undef, "/dev/null", $to_id, "b/$file");
-		} elsif ($status eq "D") {
-			print "<div class=\"diff_info\">" . file_type($from_mode) . ":" .
-			      $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blob;h=$from_id;hb=$hash_parent;f=$file")}, $from_id) . "(deleted)" .
-			      "</div>\n";
-			git_diff_print($from_id, "a/$file", undef, "/dev/null");
-		} elsif ($status eq "M") {
-			if ($from_id ne $to_id) {
-				print "<div class=\"diff_info\">" .
-				      file_type($from_mode) . ":" .
-				      $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blob;h=$from_id;hb=$hash_parent;f=$file")}, $from_id) .
-				      " -> " .
-				      file_type($to_mode) . ":" .
-				      $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blob;h=$to_id;hb=$hash;f=$file")}, $to_id);
-				print "</div>\n";
-				git_diff_print($from_id, "a/$file",  $to_id, "b/$file");
-			}
+			# merge commit
+			$formats_nav .=
+				' (merge: ' .
+				join(' ', map {
+					$cgi->a({-href => href(action=>"commitdiff",
+					                       hash=>$_)},
+					        esc_html(substr($_, 0, 7)));
+				} @{$co{'parents'}} ) .
+				')';
 		}
 	}
-	print "<br/>\n" .
-	      "</div>";
-	git_footer_html();
-}
 
-sub git_commitdiff_plain {
-	mkdir($git_temp, 0700);
-	my %co = parse_commit($hash);
-	if (!%co) {
-		die_error(undef, "Unknown commit object");
-	}
 	if (!defined $hash_parent) {
 		$hash_parent = $co{'parent'} || '--root';
 	}
-	open my $fd, "-|", $GIT, "diff-tree", '-r', $hash_parent, $hash
-		or die_error(undef, "Open git-diff-tree failed");
-	my @difftree = map { chomp; $_ } <$fd>;
-	close $fd or die_error(undef, "Reading diff-tree failed");
 
-	# try to figure out the next tag after this commit
-	my $tagname;
-	my $refs = git_get_references("tags");
-	open $fd, "-|", $GIT, "rev-list", "HEAD";
-	my @commits = map { chomp; $_ } <$fd>;
-	close $fd;
-	foreach my $commit (@commits) {
-		if (defined $refs->{$commit}) {
-			$tagname = $refs->{$commit}
-		}
-		if ($commit eq $hash) {
-			last;
+	# read commitdiff
+	my $fd;
+	my @difftree;
+	if ($format eq 'html') {
+		open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
+			"--no-commit-id", "--patch-with-raw", "--full-index",
+			$hash_parent, $hash, "--"
+			or die_error(undef, "Open git-diff-tree failed");
+
+		while (my $line = <$fd>) {
+			chomp $line;
+			# empty line ends raw part of diff-tree output
+			last unless $line;
+			push @difftree, $line;
 		}
-	}
 
-	print $cgi->header(-type => "text/plain", -charset => 'utf-8', '-content-disposition' => "inline; filename=\"git-$hash.patch\"");
-	my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
-	my $comment = $co{'comment'};
-	print "From: $co{'author'}\n" .
-	      "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n".
-	      "Subject: $co{'title'}\n";
-	if (defined $tagname) {
-		print "X-Git-Tag: $tagname\n";
+	} elsif ($format eq 'plain') {
+		open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
+			'-p', $hash_parent, $hash, "--"
+			or die_error(undef, "Open git-diff-tree failed");
+
+	} else {
+		die_error(undef, "Unknown commitdiff format");
 	}
-	print "X-Git-Url: $my_url?p=$project;a=commitdiff;h=$hash\n" .
-	      "\n";
 
-	foreach my $line (@$comment) {;
-		print "$line\n";
+	# non-textual hash id's can be cached
+	my $expires;
+	if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
+		$expires = "+1d";
 	}
-	print "---\n\n";
 
-	foreach my $line (@difftree) {
-		if ($line !~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)\t(.*)$/) {
-			next;
+	# write commit message
+	if ($format eq 'html') {
+		my $refs = git_get_references();
+		my $ref = format_ref_marker($refs, $co{'id'});
+
+		git_header_html(undef, $expires);
+		git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
+		git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
+		git_print_authorship(\%co);
+		print "<div class=\"page_body\">\n";
+		if (@{$co{'comment'}} > 1) {
+			print "<div class=\"log\">\n";
+			git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
+			print "</div>\n"; # class="log"
 		}
-		my $from_id = $3;
-		my $to_id = $4;
-		my $status = $5;
-		my $file = $6;
-		if ($status eq "A") {
-			git_diff_print(undef, "/dev/null", $to_id, "b/$file", "plain");
-		} elsif ($status eq "D") {
-			git_diff_print($from_id, "a/$file", undef, "/dev/null", "plain");
-		} elsif ($status eq "M") {
-			git_diff_print($from_id, "a/$file",  $to_id, "b/$file", "plain");
+
+	} elsif ($format eq 'plain') {
+		my $refs = git_get_references("tags");
+		my $tagname = git_get_rev_name_tags($hash);
+		my $filename = basename($project) . "-$hash.patch";
+
+		print $cgi->header(
+			-type => 'text/plain',
+			-charset => 'utf-8',
+			-expires => $expires,
+			-content_disposition => 'inline; filename="' . "$filename" . '"');
+		my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
+		print <<TEXT;
+From: $co{'author'}
+Date: $ad{'rfc2822'} ($ad{'tz_local'})
+Subject: $co{'title'}
+TEXT
+		print "X-Git-Tag: $tagname\n" if $tagname;
+		print "X-Git-Url: " . $cgi->self_url() . "\n\n";
+
+		foreach my $line (@{$co{'comment'}}) {
+			print "$line\n";
 		}
+		print "---\n\n";
+	}
+
+	# write patch
+	if ($format eq 'html') {
+		git_difftree_body(\@difftree, $hash, $hash_parent);
+		print "<br/>\n";
+
+		git_patchset_body($fd, \@difftree, $hash, $hash_parent);
+		close $fd;
+		print "</div>\n"; # class="page_body"
+		git_footer_html();
+
+	} elsif ($format eq 'plain') {
+		local $/ = undef;
+		print <$fd>;
+		close $fd
+			or print "Reading git-diff-tree failed\n";
 	}
 }
 
+sub git_commitdiff_plain {
+	git_commitdiff('plain');
+}
+
 sub git_history {
 	if (!defined $hash_base) {
 		$hash_base = git_get_head_hash($project);
 	}
+	if (!defined $page) {
+		$page = 0;
+	}
 	my $ftype;
 	my %co = parse_commit($hash_base);
 	if (!%co) {
 		die_error(undef, "Unknown commit object");
 	}
+
 	my $refs = git_get_references();
-	git_header_html();
-	git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base);
-	git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
+	my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
+
 	if (!defined $hash && defined $file_name) {
 		$hash = git_get_hash_by_path($hash_base, $file_name);
 	}
 	if (defined $hash) {
 		$ftype = git_get_type($hash);
 	}
-	git_print_page_path($file_name, $ftype);
 
-	open my $fd, "-|",
-		$GIT, "rev-list", "--full-history", $hash_base, "--", $file_name;
-	git_history_body($fd, $refs, $hash_base, $ftype);
+	my @commitlist = parse_commits($hash_base, 101, (100 * $page), "--full-history", $file_name);
+
+	my $paging_nav = '';
+	if ($page > 0) {
+		$paging_nav .=
+			$cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
+			                       file_name=>$file_name)},
+			        "first");
+		$paging_nav .= " &sdot; " .
+			$cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
+			                       file_name=>$file_name, page=>$page-1),
+			         -accesskey => "p", -title => "Alt-p"}, "prev");
+	} else {
+		$paging_nav .= "first";
+		$paging_nav .= " &sdot; prev";
+	}
+	if ($#commitlist >= 100) {
+		$paging_nav .= " &sdot; " .
+			$cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
+			                       file_name=>$file_name, page=>$page+1),
+			         -accesskey => "n", -title => "Alt-n"}, "next");
+	} else {
+		$paging_nav .= " &sdot; next";
+	}
+	my $next_link = '';
+	if ($#commitlist >= 100) {
+		$next_link =
+			$cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
+			                       file_name=>$file_name, page=>$page+1),
+			         -accesskey => "n", -title => "Alt-n"}, "next");
+	}
+
+	git_header_html();
+	git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
+	git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
+	git_print_page_path($file_name, $ftype, $hash_base);
+
+	git_history_body(\@commitlist, 0, 99,
+	                 $refs, $hash_base, $ftype, $next_link);
 
-	close $fd;
 	git_footer_html();
 }
 
 sub git_search {
+	my ($have_search) = gitweb_check_feature('search');
+	if (!$have_search) {
+		die_error('403 Permission denied', "Permission denied");
+	}
 	if (!defined $searchtext) {
 		die_error(undef, "Text field empty");
 	}
@@ -2512,79 +4272,82 @@ sub git_search {
 	if (!%co) {
 		die_error(undef, "Unknown commit object");
 	}
-	# pickaxe may take all resources of your box and run for several minutes
-	# with every query - so decide by yourself how public you make this feature :)
-	my $commit_search = 1;
-	my $author_search = 0;
-	my $committer_search = 0;
-	my $pickaxe_search = 0;
-	if ($searchtext =~ s/^author\\://i) {
-		$author_search = 1;
-	} elsif ($searchtext =~ s/^committer\\://i) {
-		$committer_search = 1;
-	} elsif ($searchtext =~ s/^pickaxe\\://i) {
-		$commit_search = 0;
-		$pickaxe_search = 1;
+	if (!defined $page) {
+		$page = 0;
+	}
+
+	$searchtype ||= 'commit';
+	if ($searchtype eq 'pickaxe') {
+		# pickaxe may take all resources of your box and run for several minutes
+		# with every query - so decide by yourself how public you make this feature
+		my ($have_pickaxe) = gitweb_check_feature('pickaxe');
+		if (!$have_pickaxe) {
+			die_error('403 Permission denied', "Permission denied");
+		}
 	}
+
 	git_header_html();
-	git_print_page_nav('','', $hash,$co{'tree'},$hash);
-	git_print_header_div('commit', esc_html($co{'title'}), $hash);
 
-	print "<table cellspacing=\"0\">\n";
-	my $alternate = 0;
-	if ($commit_search) {
-		$/ = "\0";
-		open my $fd, "-|", $GIT, "rev-list", "--header", "--parents", $hash or next;
-		while (my $commit_text = <$fd>) {
-			if (!grep m/$searchtext/i, $commit_text) {
-				next;
-			}
-			if ($author_search && !grep m/\nauthor .*$searchtext/i, $commit_text) {
-				next;
-			}
-			if ($committer_search && !grep m/\ncommitter .*$searchtext/i, $commit_text) {
-				next;
-			}
-			my @commit_lines = split "\n", $commit_text;
-			my %co = parse_commit(undef, \@commit_lines);
-			if (!%co) {
-				next;
-			}
-			if ($alternate) {
-				print "<tr class=\"dark\">\n";
-			} else {
-				print "<tr class=\"light\">\n";
-			}
-			$alternate ^= 1;
-			print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
-			      "<td><i>" . esc_html(chop_str($co{'author_name'}, 15, 5)) . "</i></td>\n" .
-			      "<td>" .
-			      $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commit;h=$co{'id'}"), -class => "list"}, "<b>" . esc_html(chop_str($co{'title'}, 50)) . "</b><br/>");
-			my $comment = $co{'comment'};
-			foreach my $line (@$comment) {
-				if ($line =~ m/^(.*)($searchtext)(.*)$/i) {
-					my $lead = esc_html($1) || "";
-					$lead = chop_str($lead, 30, 10);
-					my $match = esc_html($2) || "";
-					my $trail = esc_html($3) || "";
-					$trail = chop_str($trail, 30, 10);
-					my $text = "$lead<span class=\"match\">$match</span>$trail";
-					print chop_str($text, 80, 5) . "<br/>\n";
-				}
-			}
-			print "</td>\n" .
-			      "<td class=\"link\">" .
-			      $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commit;h=$co{'id'}")}, "commit") .
-			      " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=tree;h=$co{'tree'};hb=$co{'id'}")}, "tree");
-			print "</td>\n" .
-			      "</tr>\n";
+	if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
+		my $greptype;
+		if ($searchtype eq 'commit') {
+			$greptype = "--grep=";
+		} elsif ($searchtype eq 'author') {
+			$greptype = "--author=";
+		} elsif ($searchtype eq 'committer') {
+			$greptype = "--committer=";
 		}
-		close $fd;
+		$greptype .= $searchtext;
+		my @commitlist = parse_commits($hash, 101, (100 * $page), $greptype);
+
+		my $paging_nav = '';
+		if ($page > 0) {
+			$paging_nav .=
+				$cgi->a({-href => href(action=>"search", hash=>$hash,
+						       searchtext=>$searchtext, searchtype=>$searchtype)},
+					"first");
+			$paging_nav .= " &sdot; " .
+				$cgi->a({-href => href(action=>"search", hash=>$hash,
+						       searchtext=>$searchtext, searchtype=>$searchtype,
+						       page=>$page-1),
+					 -accesskey => "p", -title => "Alt-p"}, "prev");
+		} else {
+			$paging_nav .= "first";
+			$paging_nav .= " &sdot; prev";
+		}
+		if ($#commitlist >= 100) {
+			$paging_nav .= " &sdot; " .
+				$cgi->a({-href => href(action=>"search", hash=>$hash,
+						       searchtext=>$searchtext, searchtype=>$searchtype,
+						       page=>$page+1),
+					 -accesskey => "n", -title => "Alt-n"}, "next");
+		} else {
+			$paging_nav .= " &sdot; next";
+		}
+		my $next_link = '';
+		if ($#commitlist >= 100) {
+			$next_link =
+				$cgi->a({-href => href(action=>"search", hash=>$hash,
+						       searchtext=>$searchtext, searchtype=>$searchtype,
+						       page=>$page+1),
+					 -accesskey => "n", -title => "Alt-n"}, "next");
+		}
+
+		git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
+		git_print_header_div('commit', esc_html($co{'title'}), $hash);
+		git_search_grep_body(\@commitlist, 0, 99, $next_link);
 	}
 
-	if ($pickaxe_search) {
+	if ($searchtype eq 'pickaxe') {
+		git_print_page_nav('','', $hash,$co{'tree'},$hash);
+		git_print_header_div('commit', esc_html($co{'title'}), $hash);
+
+		print "<table cellspacing=\"0\">\n";
+		my $alternate = 1;
 		$/ = "\n";
-		open my $fd, "-|", "$GIT rev-list $hash | $GIT diff-tree -r --stdin -S\'$searchtext\'";
+		my $git_command = git_cmd_str();
+		open my $fd, "-|", "$git_command rev-list $hash | " .
+			"$git_command diff-tree -r --stdin -S\'$searchtext\'";
 		undef %co;
 		my @files;
 		while (my $line = <$fd>) {
@@ -2612,18 +4375,22 @@ sub git_search {
 					print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
 					      "<td><i>" . esc_html(chop_str($co{'author_name'}, 15, 5)) . "</i></td>\n" .
 					      "<td>" .
-					      $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commit;h=$co{'id'}"), -class => "list"}, "<b>" .
-					      esc_html(chop_str($co{'title'}, 50)) . "</b><br/>");
+					      $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
+					              -class => "list subject"},
+					              esc_html(chop_str($co{'title'}, 50)) . "<br/>");
 					while (my $setref = shift @files) {
 						my %set = %$setref;
-						print $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blob;h=$set{'id'};hb=$co{'id'};f=$set{'file'}"), class => "list"},
-						      "<span class=\"match\">" . esc_html($set{'file'}) . "</span>") .
+						print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
+						                             hash=>$set{'id'}, file_name=>$set{'file'}),
+						              -class => "list"},
+						              "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
 						      "<br/>\n";
 					}
 					print "</td>\n" .
 					      "<td class=\"link\">" .
-					      $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commit;h=$co{'id'}")}, "commit") .
-					      " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=tree;h=$co{'tree'};hb=$co{'id'}")}, "tree");
+					      $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
+					      " | " .
+					      $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
 					print "</td>\n" .
 					      "</tr>\n";
 				}
@@ -2631,8 +4398,34 @@ sub git_search {
 			}
 		}
 		close $fd;
+
+		print "</table>\n";
 	}
-	print "</table>\n";
+	git_footer_html();
+}
+
+sub git_search_help {
+	git_header_html();
+	git_print_page_nav('','', $hash,$hash,$hash);
+	print <<EOT;
+<dl>
+<dt><b>commit</b></dt>
+<dd>The commit messages and authorship information will be scanned for the given string.</dd>
+<dt><b>author</b></dt>
+<dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given string.</dd>
+<dt><b>committer</b></dt>
+<dd>Name and e-mail of the committer and date of commit will be scanned for the given string.</dd>
+EOT
+	my ($have_pickaxe) = gitweb_check_feature('pickaxe');
+	if ($have_pickaxe) {
+		print <<EOT;
+<dt><b>pickaxe</b></dt>
+<dd>All commits that caused the string to appear or disappear from any file (changes that
+added, removed or "modified" the string) will be listed. This search can take a while and
+takes a lot of strain on the server, so please use it wisely.</dd>
+EOT
+	}
+	print "</dl>\n";
 	git_footer_html();
 }
 
@@ -2646,102 +4439,268 @@ sub git_shortlog {
 	}
 	my $refs = git_get_references();
 
-	my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
-	open my $fd, "-|", $GIT, "rev-list", $limit, $hash
-		or die_error(undef, "Open git-rev-list failed");
-	my @revlist = map { chomp; $_ } <$fd>;
-	close $fd;
+	my @commitlist = parse_commits($hash, 101, (100 * $page));
 
-	my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, $#revlist);
+	my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, (100 * ($page+1)));
 	my $next_link = '';
-	if ($#revlist >= (100 * ($page+1)-1)) {
+	if ($#commitlist >= 100) {
 		$next_link =
-			$cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=shortlog;h=$hash;pg=" . ($page+1)),
-			         -title => "Alt-n"}, "next");
+			$cgi->a({-href => href(action=>"shortlog", hash=>$hash, page=>$page+1),
+			         -accesskey => "n", -title => "Alt-n"}, "next");
 	}
 
-
 	git_header_html();
 	git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
 	git_print_header_div('summary', $project);
 
-	git_shortlog_body(\@revlist, ($page * 100), $#revlist, $refs, $next_link);
+	git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
 
 	git_footer_html();
 }
 
 ## ......................................................................
-## feeds (RSS, OPML)
+## feeds (RSS, Atom; OPML)
+
+sub git_feed {
+	my $format = shift || 'atom';
+	my ($have_blame) = gitweb_check_feature('blame');
+
+	# Atom: http://www.atomenabled.org/developers/syndication/
+	# RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
+	if ($format ne 'rss' && $format ne 'atom') {
+		die_error(undef, "Unknown web feed format");
+	}
+
+	# log/feed of current (HEAD) branch, log of given branch, history of file/directory
+	my $head = $hash || 'HEAD';
+	my @commitlist = parse_commits($head, 150);
+
+	my %latest_commit;
+	my %latest_date;
+	my $content_type = "application/$format+xml";
+	if (defined $cgi->http('HTTP_ACCEPT') &&
+		 $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
+		# browser (feed reader) prefers text/xml
+		$content_type = 'text/xml';
+	}
+	if (defined($commitlist[0])) {
+		%latest_commit = %{$commitlist[0]};
+		%latest_date   = parse_date($latest_commit{'author_epoch'});
+		print $cgi->header(
+			-type => $content_type,
+			-charset => 'utf-8',
+			-last_modified => $latest_date{'rfc2822'});
+	} else {
+		print $cgi->header(
+			-type => $content_type,
+			-charset => 'utf-8');
+	}
 
-sub git_rss {
-	# http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
-	open my $fd, "-|", $GIT, "rev-list", "--max-count=150", git_get_head_hash($project)
-		or die_error(undef, "Open git-rev-list failed");
-	my @revlist = map { chomp; $_ } <$fd>;
-	close $fd or die_error(undef, "Reading git-rev-list failed");
-	print $cgi->header(-type => 'text/xml', -charset => 'utf-8');
-	print "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n".
-	      "<rss version=\"2.0\" xmlns:content=\"http://purl.org/rss/1.0/modules/content/\">\n";
-	print "<channel>\n";
-	print "<title>$project</title>\n".
-	      "<link>" . esc_html("$my_url?p=$project;a=summary") . "</link>\n".
-	      "<description>$project log</description>\n".
-	      "<language>en</language>\n";
-
-	for (my $i = 0; $i <= $#revlist; $i++) {
-		my $commit = $revlist[$i];
-		my %co = parse_commit($commit);
+	# Optimization: skip generating the body if client asks only
+	# for Last-Modified date.
+	return if ($cgi->request_method() eq 'HEAD');
+
+	# header variables
+	my $title = "$site_name - $project/$action";
+	my $feed_type = 'log';
+	if (defined $hash) {
+		$title .= " - '$hash'";
+		$feed_type = 'branch log';
+		if (defined $file_name) {
+			$title .= " :: $file_name";
+			$feed_type = 'history';
+		}
+	} elsif (defined $file_name) {
+		$title .= " - $file_name";
+		$feed_type = 'history';
+	}
+	$title .= " $feed_type";
+	my $descr = git_get_project_description($project);
+	if (defined $descr) {
+		$descr = esc_html($descr);
+	} else {
+		$descr = "$project " .
+		         ($format eq 'rss' ? 'RSS' : 'Atom') .
+		         " feed";
+	}
+	my $owner = git_get_project_owner($project);
+	$owner = esc_html($owner);
+
+	#header
+	my $alt_url;
+	if (defined $file_name) {
+		$alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
+	} elsif (defined $hash) {
+		$alt_url = href(-full=>1, action=>"log", hash=>$hash);
+	} else {
+		$alt_url = href(-full=>1, action=>"summary");
+	}
+	print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
+	if ($format eq 'rss') {
+		print <<XML;
+<rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
+<channel>
+XML
+		print "<title>$title</title>\n" .
+		      "<link>$alt_url</link>\n" .
+		      "<description>$descr</description>\n" .
+		      "<language>en</language>\n";
+	} elsif ($format eq 'atom') {
+		print <<XML;
+<feed xmlns="http://www.w3.org/2005/Atom">
+XML
+		print "<title>$title</title>\n" .
+		      "<subtitle>$descr</subtitle>\n" .
+		      '<link rel="alternate" type="text/html" href="' .
+		      $alt_url . '" />' . "\n" .
+		      '<link rel="self" type="' . $content_type . '" href="' .
+		      $cgi->self_url() . '" />' . "\n" .
+		      "<id>" . href(-full=>1) . "</id>\n" .
+		      # use project owner for feed author
+		      "<author><name>$owner</name></author>\n";
+		if (defined $favicon) {
+			print "<icon>" . esc_url($favicon) . "</icon>\n";
+		}
+		if (defined $logo_url) {
+			# not twice as wide as tall: 72 x 27 pixels
+			print "<logo>" . esc_url($logo) . "</logo>\n";
+		}
+		if (! %latest_date) {
+			# dummy date to keep the feed valid until commits trickle in:
+			print "<updated>1970-01-01T00:00:00Z</updated>\n";
+		} else {
+			print "<updated>$latest_date{'iso-8601'}</updated>\n";
+		}
+	}
+
+	# contents
+	for (my $i = 0; $i <= $#commitlist; $i++) {
+		my %co = %{$commitlist[$i]};
+		my $commit = $co{'id'};
 		# we read 150, we always show 30 and the ones more recent than 48 hours
-		if (($i >= 20) && ((time - $co{'committer_epoch'}) > 48*60*60)) {
+		if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
 			last;
 		}
-		my %cd = parse_date($co{'committer_epoch'});
-		open $fd, "-|", $GIT, "diff-tree", '-r', $co{'parent'}, $co{'id'} or next;
+		my %cd = parse_date($co{'author_epoch'});
+
+		# get list of changed files
+		open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
+			$co{'parent'}, $co{'id'}, "--", (defined $file_name ? $file_name : ())
+			or next;
 		my @difftree = map { chomp; $_ } <$fd>;
-		close $fd or next;
-		print "<item>\n" .
-		      "<title>" .
-		      sprintf("%d %s %02d:%02d", $cd{'mday'}, $cd{'month'}, $cd{'hour'}, $cd{'minute'}) . " - " . esc_html($co{'title'}) .
-		      "</title>\n" .
-		      "<author>" . esc_html($co{'author'}) . "</author>\n" .
-		      "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
-		      "<guid isPermaLink=\"true\">" . esc_html("$my_url?p=$project;a=commit;h=$commit") . "</guid>\n" .
-		      "<link>" . esc_html("$my_url?p=$project;a=commit;h=$commit") . "</link>\n" .
-		      "<description>" . esc_html($co{'title'}) . "</description>\n" .
-		      "<content:encoded>" .
-		      "<![CDATA[\n";
+		close $fd
+			or next;
+
+		# print element (entry, item)
+		my $co_url = href(-full=>1, action=>"commit", hash=>$commit);
+		if ($format eq 'rss') {
+			print "<item>\n" .
+			      "<title>" . esc_html($co{'title'}) . "</title>\n" .
+			      "<author>" . esc_html($co{'author'}) . "</author>\n" .
+			      "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
+			      "<guid isPermaLink=\"true\">$co_url</guid>\n" .
+			      "<link>$co_url</link>\n" .
+			      "<description>" . esc_html($co{'title'}) . "</description>\n" .
+			      "<content:encoded>" .
+			      "<![CDATA[\n";
+		} elsif ($format eq 'atom') {
+			print "<entry>\n" .
+			      "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
+			      "<updated>$cd{'iso-8601'}</updated>\n" .
+			      "<author>\n" .
+			      "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
+			if ($co{'author_email'}) {
+				print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
+			}
+			print "</author>\n" .
+			      # use committer for contributor
+			      "<contributor>\n" .
+			      "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
+			if ($co{'committer_email'}) {
+				print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
+			}
+			print "</contributor>\n" .
+			      "<published>$cd{'iso-8601'}</published>\n" .
+			      "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
+			      "<id>$co_url</id>\n" .
+			      "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
+			      "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
+		}
 		my $comment = $co{'comment'};
+		print "<pre>\n";
 		foreach my $line (@$comment) {
-			$line = decode("utf8", $line, Encode::FB_DEFAULT);
-			print "$line<br/>\n";
+			$line = esc_html($line);
+			print "$line\n";
 		}
-		print "<br/>\n";
-		foreach my $line (@difftree) {
-			if (!($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/)) {
-				next;
+		print "</pre><ul>\n";
+		foreach my $difftree_line (@difftree) {
+			my %difftree = parse_difftree_raw_line($difftree_line);
+			next if !$difftree{'from_id'};
+
+			my $file = $difftree{'file'} || $difftree{'to_file'};
+
+			print "<li>" .
+			      "[" .
+			      $cgi->a({-href => href(-full=>1, action=>"blobdiff",
+			                             hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
+			                             hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
+			                             file_name=>$file, file_parent=>$difftree{'from_file'}),
+			              -title => "diff"}, 'D');
+			if ($have_blame) {
+				print $cgi->a({-href => href(-full=>1, action=>"blame",
+				                             file_name=>$file, hash_base=>$commit),
+				              -title => "blame"}, 'B');
 			}
-			my $file = validate_input(unquote($7));
-			$file = decode("utf8", $file, Encode::FB_DEFAULT);
-			print "$file<br/>\n";
+			# if this is not a feed of a file history
+			if (!defined $file_name || $file_name ne $file) {
+				print $cgi->a({-href => href(-full=>1, action=>"history",
+				                             file_name=>$file, hash=>$commit),
+				              -title => "history"}, 'H');
+			}
+			$file = esc_path($file);
+			print "] ".
+			      "$file</li>\n";
+		}
+		if ($format eq 'rss') {
+			print "</ul>]]>\n" .
+			      "</content:encoded>\n" .
+			      "</item>\n";
+		} elsif ($format eq 'atom') {
+			print "</ul>\n</div>\n" .
+			      "</content>\n" .
+			      "</entry>\n";
 		}
-		print "]]>\n" .
-		      "</content:encoded>\n" .
-		      "</item>\n";
 	}
-	print "</channel></rss>";
+
+	# end of feed
+	if ($format eq 'rss') {
+		print "</channel>\n</rss>\n";
+	}	elsif ($format eq 'atom') {
+		print "</feed>\n";
+	}
+}
+
+sub git_rss {
+	git_feed('rss');
+}
+
+sub git_atom {
+	git_feed('atom');
 }
 
 sub git_opml {
 	my @list = git_get_projects_list();
 
 	print $cgi->header(-type => 'text/xml', -charset => 'utf-8');
-	print "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n".
-	      "<opml version=\"1.0\">\n".
-	      "<head>".
-	      "  <title>$site_name Git OPML Export</title>\n".
-	      "</head>\n".
-	      "<body>\n".
-	      "<outline text=\"git RSS feeds\">\n";
+	print <<XML;
+<?xml version="1.0" encoding="utf-8"?>
+<opml version="1.0">
+<head>
+  <title>$site_name OPML Export</title>
+</head>
+<body>
+<outline text="git RSS feeds">
+XML
 
 	foreach my $pr (@list) {
 		my %proj = %$pr;
@@ -2749,7 +4708,7 @@ sub git_opml {
 		if (!defined $head) {
 			next;
 		}
-		$ENV{'GIT_DIR'} = "$projectroot/$proj{'path'}";
+		$git_dir = "$projectroot/$proj{'path'}";
 		my %co = parse_commit($head);
 		if (!%co) {
 			next;
@@ -2760,7 +4719,9 @@ sub git_opml {
 		my $html = "$my_url?p=$proj{'path'};a=summary";
 		print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
 	}
-	print "</outline>\n".
-	      "</body>\n".
-	      "</opml>\n";
+	print <<XML;
+</outline>
+</body>
+</opml>
+XML
 }