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Diffstat (limited to 'git-svn.perl')
| -rwxr-xr-x | git-svn.perl | 3378 |
1 files changed, 3378 insertions, 0 deletions
diff --git a/git-svn.perl b/git-svn.perl new file mode 100755 index 000000000..145eaa865 --- /dev/null +++ b/git-svn.perl @@ -0,0 +1,3378 @@ +#!/usr/bin/env perl +# Copyright (C) 2006, Eric Wong <normalperson@yhbt.net> +# License: GPL v2 or later +use warnings; +use strict; +use vars qw/ $AUTHOR $VERSION + $SVN_URL $SVN_INFO $SVN_WC $SVN_UUID + $GIT_SVN_INDEX $GIT_SVN + $GIT_DIR $GIT_SVN_DIR $REVDB/; +$AUTHOR = 'Eric Wong <normalperson@yhbt.net>'; +$VERSION = '@@GIT_VERSION@@'; + +use Cwd qw/abs_path/; +$GIT_DIR = abs_path($ENV{GIT_DIR} || '.git'); +$ENV{GIT_DIR} = $GIT_DIR; + +my $LC_ALL = $ENV{LC_ALL}; +my $TZ = $ENV{TZ}; +# make sure the svn binary gives consistent output between locales and TZs: +$ENV{TZ} = 'UTC'; +$ENV{LC_ALL} = 'C'; +$| = 1; # unbuffer STDOUT + +# If SVN:: library support is added, please make the dependencies +# optional and preserve the capability to use the command-line client. +# use eval { require SVN::... } to make it lazy load +# We don't use any modules not in the standard Perl distribution: +use Carp qw/croak/; +use IO::File qw//; +use File::Basename qw/dirname basename/; +use File::Path qw/mkpath/; +use Getopt::Long qw/:config gnu_getopt no_ignore_case auto_abbrev pass_through/; +use File::Spec qw//; +use POSIX qw/strftime/; +use IPC::Open3; +use Memoize; +memoize('revisions_eq'); +memoize('cmt_metadata'); +memoize('get_commit_time'); + +my ($SVN_PATH, $SVN, $SVN_LOG, $_use_lib); +$_use_lib = 1 unless $ENV{GIT_SVN_NO_LIB}; +libsvn_load(); +my $_optimize_commits = 1 unless $ENV{GIT_SVN_NO_OPTIMIZE_COMMITS}; +my $sha1 = qr/[a-f\d]{40}/; +my $sha1_short = qr/[a-f\d]{4,40}/; +my ($_revision,$_stdin,$_no_ignore_ext,$_no_stop_copy,$_help,$_rmdir,$_edit, + $_find_copies_harder, $_l, $_cp_similarity, $_cp_remote, + $_repack, $_repack_nr, $_repack_flags, $_q, + $_message, $_file, $_follow_parent, $_no_metadata, + $_template, $_shared, $_no_default_regex, $_no_graft_copy, + $_limit, $_verbose, $_incremental, $_oneline, $_l_fmt, $_show_commit, + $_version, $_upgrade, $_authors, $_branch_all_refs, @_opt_m); +my (@_branch_from, %tree_map, %users, %rusers, %equiv); +my ($_svn_co_url_revs, $_svn_pg_peg_revs); +my @repo_path_split_cache; + +my %fc_opts = ( 'no-ignore-externals' => \$_no_ignore_ext, + 'branch|b=s' => \@_branch_from, + 'follow-parent|follow' => \$_follow_parent, + 'branch-all-refs|B' => \$_branch_all_refs, + 'authors-file|A=s' => \$_authors, + 'repack:i' => \$_repack, + 'no-metadata' => \$_no_metadata, + 'quiet|q' => \$_q, + 'repack-flags|repack-args|repack-opts=s' => \$_repack_flags); + +my ($_trunk, $_tags, $_branches); +my %multi_opts = ( 'trunk|T=s' => \$_trunk, + 'tags|t=s' => \$_tags, + 'branches|b=s' => \$_branches ); +my %init_opts = ( 'template=s' => \$_template, 'shared' => \$_shared ); +my %cmt_opts = ( 'edit|e' => \$_edit, + 'rmdir' => \$_rmdir, + 'find-copies-harder' => \$_find_copies_harder, + 'l=i' => \$_l, + 'copy-similarity|C=i'=> \$_cp_similarity +); + +# yes, 'native' sets "\n". Patches to fix this for non-*nix systems welcome: +my %EOL = ( CR => "\015", LF => "\012", CRLF => "\015\012", native => "\012" ); + +my %cmd = ( + fetch => [ \&fetch, "Download new revisions from SVN", + { 'revision|r=s' => \$_revision, %fc_opts } ], + init => [ \&init, "Initialize a repo for tracking" . + " (requires URL argument)", + \%init_opts ], + commit => [ \&commit, "Commit git revisions to SVN", + { 'stdin|' => \$_stdin, %cmt_opts, %fc_opts, } ], + 'show-ignore' => [ \&show_ignore, "Show svn:ignore listings", + { 'revision|r=i' => \$_revision } ], + rebuild => [ \&rebuild, "Rebuild git-svn metadata (after git clone)", + { 'no-ignore-externals' => \$_no_ignore_ext, + 'copy-remote|remote=s' => \$_cp_remote, + 'upgrade' => \$_upgrade } ], + 'graft-branches' => [ \&graft_branches, + 'Detect merges/branches from already imported history', + { 'merge-rx|m' => \@_opt_m, + 'branch|b=s' => \@_branch_from, + 'branch-all-refs|B' => \$_branch_all_refs, + 'no-default-regex' => \$_no_default_regex, + 'no-graft-copy' => \$_no_graft_copy } ], + 'multi-init' => [ \&multi_init, + 'Initialize multiple trees (like git-svnimport)', + { %multi_opts, %fc_opts } ], + 'multi-fetch' => [ \&multi_fetch, + 'Fetch multiple trees (like git-svnimport)', + \%fc_opts ], + 'log' => [ \&show_log, 'Show commit logs', + { 'limit=i' => \$_limit, + 'revision|r=s' => \$_revision, + 'verbose|v' => \$_verbose, + 'incremental' => \$_incremental, + 'oneline' => \$_oneline, + 'show-commit' => \$_show_commit, + 'authors-file|A=s' => \$_authors, + } ], + 'commit-diff' => [ \&commit_diff, 'Commit a diff between two trees', + { 'message|m=s' => \$_message, + 'file|F=s' => \$_file, + %cmt_opts } ], +); + +my $cmd; +for (my $i = 0; $i < @ARGV; $i++) { + if (defined $cmd{$ARGV[$i]}) { + $cmd = $ARGV[$i]; + splice @ARGV, $i, 1; + last; + } +}; + +my %opts = %{$cmd{$cmd}->[2]} if (defined $cmd); + +read_repo_config(\%opts); +my $rv = GetOptions(%opts, 'help|H|h' => \$_help, + 'version|V' => \$_version, + 'id|i=s' => \$GIT_SVN); +exit 1 if (!$rv && $cmd ne 'log'); + +set_default_vals(); +usage(0) if $_help; +version() if $_version; +usage(1) unless defined $cmd; +init_vars(); +load_authors() if $_authors; +load_all_refs() if $_branch_all_refs; +svn_compat_check() unless $_use_lib; +migration_check() unless $cmd =~ /^(?:init|rebuild|multi-init)$/; +$cmd{$cmd}->[0]->(@ARGV); +exit 0; + +####################### primary functions ###################### +sub usage { + my $exit = shift || 0; + my $fd = $exit ? \*STDERR : \*STDOUT; + print $fd <<""; +git-svn - bidirectional operations between a single Subversion tree and git +Usage: $0 <command> [options] [arguments]\n + + print $fd "Available commands:\n" unless $cmd; + + foreach (sort keys %cmd) { + next if $cmd && $cmd ne $_; + print $fd ' ',pack('A13',$_),$cmd{$_}->[1],"\n"; + foreach (keys %{$cmd{$_}->[2]}) { + # prints out arguments as they should be passed: + my $x = s#[:=]s$## ? '<arg>' : s#[:=]i$## ? '<num>' : ''; + print $fd ' ' x 17, join(', ', map { length $_ > 1 ? + "--$_" : "-$_" } + split /\|/,$_)," $x\n"; + } + } + print $fd <<""; +\nGIT_SVN_ID may be set in the environment or via the --id/-i switch to an +arbitrary identifier if you're tracking multiple SVN branches/repositories in +one git repository and want to keep them separate. See git-svn(1) for more +information. + + exit $exit; +} + +sub version { + print "git-svn version $VERSION\n"; + exit 0; +} + +sub rebuild { + if (quiet_run(qw/git-rev-parse --verify/,"refs/remotes/$GIT_SVN^0")) { + copy_remote_ref(); + } + $SVN_URL = shift or undef; + my $newest_rev = 0; + if ($_upgrade) { + sys('git-update-ref',"refs/remotes/$GIT_SVN","$GIT_SVN-HEAD"); + } else { + check_upgrade_needed(); + } + + my $pid = open(my $rev_list,'-|'); + defined $pid or croak $!; + if ($pid == 0) { + exec("git-rev-list","refs/remotes/$GIT_SVN") or croak $!; + } + my $latest; + while (<$rev_list>) { + chomp; + my $c = $_; + croak "Non-SHA1: $c\n" unless $c =~ /^$sha1$/o; + my @commit = grep(/^git-svn-id: /,`git-cat-file commit $c`); + next if (!@commit); # skip merges + my ($url, $rev, $uuid) = extract_metadata($commit[$#commit]); + if (!$rev || !$uuid) { + croak "Unable to extract revision or UUID from ", + "$c, $commit[$#commit]\n"; + } + + # if we merged or otherwise started elsewhere, this is + # how we break out of it + next if (defined $SVN_UUID && ($uuid ne $SVN_UUID)); + next if (defined $SVN_URL && defined $url && ($url ne $SVN_URL)); + + unless (defined $latest) { + if (!$SVN_URL && !$url) { + croak "SVN repository location required: $url\n"; + } + $SVN_URL ||= $url; + $SVN_UUID ||= $uuid; + setup_git_svn(); + $latest = $rev; + } + revdb_set($REVDB, $rev, $c); + print "r$rev = $c\n"; + $newest_rev = $rev if ($rev > $newest_rev); + } + close $rev_list or croak $?; + + goto out if $_use_lib; + if (!chdir $SVN_WC) { + svn_cmd_checkout($SVN_URL, $latest, $SVN_WC); + chdir $SVN_WC or croak $!; + } + + $pid = fork; + defined $pid or croak $!; + if ($pid == 0) { + my @svn_up = qw(svn up); + push @svn_up, '--ignore-externals' unless $_no_ignore_ext; + sys(@svn_up,"-r$newest_rev"); + $ENV{GIT_INDEX_FILE} = $GIT_SVN_INDEX; + index_changes(); + exec('git-write-tree') or croak $!; + } + waitpid $pid, 0; + croak $? if $?; +out: + if ($_upgrade) { + print STDERR <<""; +Keeping deprecated refs/head/$GIT_SVN-HEAD for now. Please remove it +when you have upgraded your tools and habits to use refs/remotes/$GIT_SVN + + } +} + +sub init { + my $url = shift or die "SVN repository location required " . + "as a command-line argument\n"; + $url =~ s!/+$!!; # strip trailing slash + + if (my $repo_path = shift) { + unless (-d $repo_path) { + mkpath([$repo_path]); + } + $GIT_DIR = $ENV{GIT_DIR} = $repo_path . "/.git"; + init_vars(); + } + + $SVN_URL = $url; + unless (-d $GIT_DIR) { + my @init_db = ('git-init-db'); + push @init_db, "--template=$_template" if defined $_template; + push @init_db, "--shared" if defined $_shared; + sys(@init_db); + } + setup_git_svn(); +} + +sub fetch { + check_upgrade_needed(); + $SVN_URL ||= file_to_s("$GIT_SVN_DIR/info/url"); + my $ret = $_use_lib ? fetch_lib(@_) : fetch_cmd(@_); + if ($ret->{commit} && quiet_run(qw(git-rev-parse --verify + refs/heads/master^0))) { + sys(qw(git-update-ref refs/heads/master),$ret->{commit}); + } + return $ret; +} + +sub fetch_cmd { + my (@parents) = @_; + my @log_args = -d $SVN_WC ? ($SVN_WC) : ($SVN_URL); + unless ($_revision) { + $_revision = -d $SVN_WC ? 'BASE:HEAD' : '0:HEAD'; + } + push @log_args, "-r$_revision"; + push @log_args, '--stop-on-copy' unless $_no_stop_copy; + + my $svn_log = svn_log_raw(@log_args); + + my $base = next_log_entry($svn_log) or croak "No base revision!\n"; + # don't need last_revision from grab_base_rev() because + # user could've specified a different revision to skip (they + # didn't want to import certain revisions into git for whatever + # reason, so trust $base->{revision} instead. + my (undef, $last_commit) = svn_grab_base_rev(); + unless (-d $SVN_WC) { + svn_cmd_checkout($SVN_URL,$base->{revision},$SVN_WC); + chdir $SVN_WC or croak $!; + read_uuid(); + $last_commit = git_commit($base, @parents); + assert_tree($last_commit); + } else { + chdir $SVN_WC or croak $!; + read_uuid(); + # looks like a user manually cp'd and svn switch'ed + unless ($last_commit) { + sys(qw/svn revert -R ./); + assert_svn_wc_clean($base->{revision}); + $last_commit = git_commit($base, @parents); + assert_tree($last_commit); + } + } + my @svn_up = qw(svn up); + push @svn_up, '--ignore-externals' unless $_no_ignore_ext; + my $last = $base; + while (my $log_msg = next_log_entry($svn_log)) { + if ($last->{revision} >= $log_msg->{revision}) { + croak "Out of order: last >= current: ", + "$last->{revision} >= $log_msg->{revision}\n"; + } + # Revert is needed for cases like: + # https://svn.musicpd.org/Jamming/trunk (r166:167), but + # I can't seem to reproduce something like that on a test... + sys(qw/svn revert -R ./); + assert_svn_wc_clean($last->{revision}); + sys(@svn_up,"-r$log_msg->{revision}"); + $last_commit = git_commit($log_msg, $last_commit, @parents); + $last = $log_msg; + } + close $svn_log->{fh}; + $last->{commit} = $last_commit; + return $last; +} + +sub fetch_lib { + my (@parents) = @_; + $SVN_URL ||= file_to_s("$GIT_SVN_DIR/info/url"); + my $repo; + ($repo, $SVN_PATH) = repo_path_split($SVN_URL); + $SVN_LOG ||= libsvn_connect($repo); + $SVN ||= libsvn_connect($repo); + my ($last_rev, $last_commit) = svn_grab_base_rev(); + my ($base, $head) = libsvn_parse_revision($last_rev); + if ($base > $head) { + return { revision => $last_rev, commit => $last_commit } + } + my $index = set_index($GIT_SVN_INDEX); + + # limit ourselves and also fork() since get_log won't release memory + # after processing a revision and SVN stuff seems to leak + my $inc = 1000; + my ($min, $max) = ($base, $head < $base+$inc ? $head : $base+$inc); + read_uuid(); + if (defined $last_commit) { + unless (-e $GIT_SVN_INDEX) { + sys(qw/git-read-tree/, $last_commit); + } + chomp (my $x = `git-write-tree`); + my ($y) = (`git-cat-file commit $last_commit` + =~ /^tree ($sha1)/m); + if ($y ne $x) { + unlink $GIT_SVN_INDEX or croak $!; + sys(qw/git-read-tree/, $last_commit); + } + chomp ($x = `git-write-tree`); + if ($y ne $x) { + print STDERR "trees ($last_commit) $y != $x\n", + "Something is seriously wrong...\n"; + } + } + while (1) { + # fork, because using SVN::Pool with get_log() still doesn't + # seem to help enough to keep memory usage down. + defined(my $pid = fork) or croak $!; + if (!$pid) { + $SVN::Error::handler = \&libsvn_skip_unknown_revs; + + # Yes I'm perfectly aware that the fourth argument + # below is the limit revisions number. Unfortunately + # performance sucks with it enabled, so it's much + # faster to fetch revision ranges instead of relying + # on the limiter. + libsvn_get_log($SVN_LOG, '/'.$SVN_PATH, + $min, $max, 0, 1, 1, + sub { + my $log_msg; + if ($last_commit) { + $log_msg = libsvn_fetch( + $last_commit, @_); + $last_commit = git_commit( + $log_msg, + $last_commit, + @parents); + } else { + $log_msg = libsvn_new_tree(@_); + $last_commit = git_commit( + $log_msg, @parents); + } + }); + exit 0; + } + waitpid $pid, 0; + croak $? if $?; + ($last_rev, $last_commit) = svn_grab_base_rev(); + last if ($max >= $head); + $min = $max + 1; + $max += $inc; + $max = $head if ($max > $head); + } + restore_index($index); + return { revision => $last_rev, commit => $last_commit }; +} + +sub commit { + my (@commits) = @_; + check_upgrade_needed(); + if ($_stdin || !@commits) { + print "Reading from stdin...\n"; + @commits = (); + while (<STDIN>) { + if (/\b($sha1_short)\b/o) { + unshift @commits, $1; + } + } + } + my @revs; + foreach my $c (@commits) { + chomp(my @tmp = safe_qx('git-rev-parse',$c)); + if (scalar @tmp == 1) { + push @revs, $tmp[0]; + } elsif (scalar @tmp > 1) { + push @revs, reverse (safe_qx('git-rev-list',@tmp)); + } else { + die "Failed to rev-parse $c\n"; + } + } + chomp @revs; + $_use_lib ? commit_lib(@revs) : commit_cmd(@revs); + print "Done committing ",scalar @revs," revisions to SVN\n"; +} + +sub commit_cmd { + my (@revs) = @_; + + chdir $SVN_WC or croak "Unable to chdir $SVN_WC: $!\n"; + my $info = svn_info('.'); + my $fetched = fetch(); + if ($info->{Revision} != $fetched->{revision}) { + print STDERR "There are new revisions that were fetched ", + "and need to be merged (or acknowledged) ", + "before committing.\n"; + exit 1; + } + $info = svn_info('.'); + read_uuid($info); + my $last = $fetched; + foreach my $c (@revs) { + my $mods = svn_checkout_tree($last, $c); + if (scalar @$mods == 0) { + print "Skipping, no changes detected\n"; + next; + } + $last = svn_commit_tree($last, $c); + } +} + +sub commit_lib { + my (@revs) = @_; + my ($r_last, $cmt_last) = svn_grab_base_rev(); + defined $r_last or die "Must have an existing revision to commit\n"; + my $fetched = fetch(); + if ($r_last != $fetched->{revision}) { + print STDERR "There are new revisions that were fetched ", + "and need to be merged (or acknowledged) ", + "before committing.\n", + "last rev: $r_last\n", + " current: $fetched->{revision}\n"; + exit 1; + } + read_uuid(); + my @lock = $SVN::Core::VERSION ge '1.2.0' ? (undef, 0) : (); + my $commit_msg = "$GIT_SVN_DIR/.svn-commit.tmp.$$"; + + set_svn_commit_env(); + foreach my $c (@revs) { + my $log_msg = get_commit_message($c, $commit_msg); + + # fork for each commit because there's a memory leak I + # can't track down... (it's probably in the SVN code) + defined(my $pid = open my $fh, '-|') or croak $!; + if (!$pid) { + my $ed = SVN::Git::Editor->new( + { r => $r_last, + ra => $SVN, + c => $c, + svn_path => $SVN_PATH + }, + $SVN->get_commit_editor( + $log_msg->{msg}, + sub { + libsvn_commit_cb( + @_, $c, + $log_msg->{msg}, + $r_last, + $cmt_last) + }, + @lock) + ); + my $mods = libsvn_checkout_tree($cmt_last, $c, $ed); + if (@$mods == 0) { + print "No changes\nr$r_last = $cmt_last\n"; + $ed->abort_edit; + } else { + $ed->close_edit; + } + exit 0; + } + my ($r_new, $cmt_new, $no); + while (<$fh>) { + print $_; + chomp; + if (/^r(\d+) = ($sha1)$/o) { + ($r_new, $cmt_new) = ($1, $2); + } elsif ($_ eq 'No changes') { + $no = 1; + } + } + close $fh or croak $?; + if (! defined $r_new && ! defined $cmt_new) { + unless ($no) { + die "Failed to parse revision information\n"; + } + } else { + ($r_last, $cmt_last) = ($r_new, $cmt_new); + } + } + $ENV{LC_ALL} = 'C'; + unlink $commit_msg; +} + +sub show_ignore { + $SVN_URL ||= file_to_s("$GIT_SVN_DIR/info/url"); + $_use_lib ? show_ignore_lib() : show_ignore_cmd(); +} + +sub show_ignore_cmd { + require File::Find or die $!; + if (defined $_revision) { + die "-r/--revision option doesn't work unless the Perl SVN ", + "libraries are used\n"; + } + chdir $SVN_WC or croak $!; + my %ign; + File::Find::find({wanted=>sub{if(lstat $_ && -d _ && -d "$_/.svn"){ + s#^\./##; + @{$ign{$_}} = svn_propget_base('svn:ignore', $_); + }}, no_chdir=>1},'.'); + + print "\n# /\n"; + foreach (@{$ign{'.'}}) { print '/',$_ if /\S/ } + delete $ign{'.'}; + foreach my $i (sort keys %ign) { + print "\n# ",$i,"\n"; + foreach (@{$ign{$i}}) { print '/',$i,'/',$_ if /\S/ } + } +} + +sub show_ignore_lib { + my $repo; + ($repo, $SVN_PATH) = repo_path_split($SVN_URL); + $SVN ||= libsvn_connect($repo); + my $r = defined $_revision ? $_revision : $SVN->get_latest_revnum; + libsvn_traverse_ignore(\*STDOUT, $SVN_PATH, $r); +} + +sub graft_branches { + my $gr_file = "$GIT_DIR/info/grafts"; + my ($grafts, $comments) = read_grafts($gr_file); + my $gr_sha1; + + if (%$grafts) { + # temporarily disable our grafts file to make this idempotent + chomp($gr_sha1 = safe_qx(qw/git-hash-object -w/,$gr_file)); + rename $gr_file, "$gr_file~$gr_sha1" or croak $!; + } + + my $l_map = read_url_paths(); + my @re = map { qr/$_/is } @_opt_m if @_opt_m; + unless ($_no_default_regex) { + push @re, (qr/\b(?:merge|merging|merged)\s+with\s+([\w\.\-]+)/i, + qr/\b(?:merge|merging|merged)\s+([\w\.\-]+)/i, + qr/\b(?:from|of)\s+([\w\.\-]+)/i ); + } + foreach my $u (keys %$l_map) { + if (@re) { + foreach my $p (keys %{$l_map->{$u}}) { + graft_merge_msg($grafts,$l_map,$u,$p,@re); + } + } + unless ($_no_graft_copy) { + if ($_use_lib) { + graft_file_copy_lib($grafts,$l_map,$u); + } else { + graft_file_copy_cmd($grafts,$l_map,$u); + } + } + } + graft_tree_joins($grafts); + + write_grafts($grafts, $comments, $gr_file); + unlink "$gr_file~$gr_sha1" if $gr_sha1; +} + +sub multi_init { + my $url = shift; + $_trunk ||= 'trunk'; + $_trunk =~ s#/+$##; + $url =~ s#/+$## if $url; + if ($_trunk !~ m#^[a-z\+]+://#) { + $_trunk = '/' . $_trunk if ($_trunk !~ m#^/#); + unless ($url) { + print STDERR "E: '$_trunk' is not a complete URL ", + "and a separate URL is not specified\n"; + exit 1; + } + $_trunk = $url . $_trunk; + } + if ($GIT_SVN eq 'git-svn') { + print "GIT_SVN_ID set to 'trunk' for $_trunk\n"; + $GIT_SVN = $ENV{GIT_SVN_ID} = 'trunk'; + } + init_vars(); + init($_trunk); + complete_url_ls_init($url, $_branches, '--branches/-b', ''); + complete_url_ls_init($url, $_tags, '--tags/-t', 'tags/'); +} + +sub multi_fetch { + # try to do trunk first, since branches/tags + # may be descended from it. + if (-e "$GIT_DIR/svn/trunk/info/url") { + fetch_child_id('trunk', @_); + } + rec_fetch('', "$GIT_DIR/svn", @_); +} + +sub show_log { + my (@args) = @_; + my ($r_min, $r_max); + my $r_last = -1; # prevent dupes + rload_authors() if $_authors; + if (defined $TZ) { + $ENV{TZ} = $TZ; + } else { + delete $ENV{TZ}; + } + if (defined $_revision) { + if ($_revision =~ /^(\d+):(\d+)$/) { + ($r_min, $r_max) = ($1, $2); + } elsif ($_revision =~ /^\d+$/) { + $r_min = $r_max = $_revision; + } else { + print STDERR "-r$_revision is not supported, use ", + "standard \'git log\' arguments instead\n"; + exit 1; + } + } + + my $pid = open(my $log,'-|'); + defined $pid or croak $!; + if (!$pid) { + exec(git_svn_log_cmd($r_min,$r_max), @args) or croak $!; + } + setup_pager(); + my (@k, $c, $d); + + while (<$log>) { + if (/^commit ($sha1_short)/o) { + my $cmt = $1; + if ($c && cmt_showable($c) && $c->{r} != $r_last) { + $r_last = $c->{r}; + process_commit($c, $r_min, $r_max, \@k) or + goto out; + } + $d = undef; + $c = { c => $cmt }; + } elsif (/^author (.+) (\d+) ([\-\+]?\d+)$/) { + get_author_info($c, $1, $2, $3); + } elsif (/^(?:tree|parent|committer) /) { + # ignore + } elsif (/^:\d{6} \d{6} $sha1_short/o) { + push @{$c->{raw}}, $_; + } elsif (/^diff /) { + $d = 1; + push @{$c->{diff}}, $_; + } elsif ($d) { + push @{$c->{diff}}, $_; + } elsif (/^ (git-svn-id:.+)$/) { + (undef, $c->{r}, undef) = extract_metadata($1); + } elsif (s/^ //) { + push @{$c->{l}}, $_; + } + } + if ($c && defined $c->{r} && $c->{r} != $r_last) { + $r_last = $c->{r}; + process_commit($c, $r_min, $r_max, \@k); + } + if (@k) { + my $swap = $r_max; + $r_max = $r_min; + $r_min = $swap; + process_commit($_, $r_min, $r_max) foreach reverse @k; + } +out: + close $log; + print '-' x72,"\n" unless $_incremental || $_oneline; +} + +sub commit_diff_usage { + print STDERR "Usage: $0 commit-diff <tree-ish> <tree-ish> [<URL>]\n"; + exit 1 +} + +sub commit_diff { + if (!$_use_lib) { + print STDERR "commit-diff must be used with SVN libraries\n"; + exit 1; + } + my $ta = shift or commit_diff_usage(); + my $tb = shift or commit_diff_usage(); + if (!eval { $SVN_URL = shift || file_to_s("$GIT_SVN_DIR/info/url") }) { + print STDERR "Needed URL or usable git-svn id command-line\n"; + commit_diff_usage(); + } + if (defined $_message && defined $_file) { + print STDERR "Both --message/-m and --file/-F specified ", + "for the commit message.\n", + "I have no idea what you mean\n"; + exit 1; + } + if (defined $_file) { + $_message = file_to_s($_message); + } else { + $_message ||= get_commit_message($tb, + "$GIT_DIR/.svn-commit.tmp.$$")->{msg}; + } + my $repo; + ($repo, $SVN_PATH) = repo_path_split($SVN_URL); + $SVN_LOG ||= libsvn_connect($repo); + $SVN ||= libsvn_connect($repo); + my @lock = $SVN::Core::VERSION ge '1.2.0' ? (undef, 0) : (); + my $ed = SVN::Git::Editor->new({ r => $SVN->get_latest_revnum, + ra => $SVN, c => $tb, + svn_path => $SVN_PATH + }, + $SVN->get_commit_editor($_message, + sub {print "Committed $_[0]\n"},@lock) + ); + my $mods = libsvn_checkout_tree($ta, $tb, $ed); + if (@$mods == 0) { + print "No changes\n$ta == $tb\n"; + $ed->abort_edit; + } else { + $ed->close_edit; + } +} + +########################### utility functions ######################### + +sub cmt_showable { + my ($c) = @_; + return 1 if defined $c->{r}; + if ($c->{l} && $c->{l}->[-1] eq "...\n" && + $c->{a_raw} =~ /\@([a-f\d\-]+)>$/) { + my @msg = safe_qx(qw/git-cat-file commit/, $c->{c}); + shift @msg while ($msg[0] ne "\n"); + shift @msg; + @{$c->{l}} = grep !/^git-svn-id: /, @msg; + + (undef, $c->{r}, undef) = extract_metadata( + (grep(/^git-svn-id: /, @msg))[-1]); + } + return defined $c->{r}; +} + +sub git_svn_log_cmd { + my ($r_min, $r_max) = @_; + my @cmd = (qw/git-log --abbrev-commit --pretty=raw + --default/, "refs/remotes/$GIT_SVN"); + push @cmd, '--summary' if $_verbose; + return @cmd unless defined $r_max; + if ($r_max == $r_min) { + push @cmd, '--max-count=1'; + if (my $c = revdb_get($REVDB, $r_max)) { + push @cmd, $c; + } + } else { + my ($c_min, $c_max); + $c_max = revdb_get($REVDB, $r_max); + $c_min = revdb_get($REVDB, $r_min); + if ($c_min && $c_max) { + if ($r_max > $r_max) { + push @cmd, "$c_min..$c_max"; + } else { + push @cmd, "$c_max..$c_min"; + } + } elsif ($r_max > $r_min) { + push @cmd, $c_max; + } else { + push @cmd, $c_min; + } + } + return @cmd; +} + +sub fetch_child_id { + my $id = shift; + print "Fetching $id\n"; + my $ref = "$GIT_DIR/refs/remotes/$id"; + defined(my $pid = open my $fh, '-|') or croak $!; + if (!$pid) { + $_repack = undef; + $GIT_SVN = $ENV{GIT_SVN_ID} = $id; + init_vars(); + fetch(@_); + exit 0; + } + while (<$fh>) { + print $_; + check_repack() if (/^r\d+ = $sha1/); + } + close $fh or croak $?; +} + +sub rec_fetch { + my ($pfx, $p, @args) = @_; + my @dir; + foreach (sort <$p/*>) { + if (-r "$_/info/url") { + $pfx .= '/' if $pfx && $pfx !~ m!/$!; + my $id = $pfx . basename $_; + next if $id eq 'trunk'; + fetch_child_id($id, @args); + } elsif (-d $_) { + push @dir, $_; + } + } + foreach (@dir) { + my $x = $_; + $x =~ s!^\Q$GIT_DIR\E/svn/!!; + rec_fetch($x, $_); + } +} + +sub complete_url_ls_init { + my ($url, $var, $switch, $pfx) = @_; + unless ($var) { + print STDERR "W: $switch not specified\n"; + return; + } + $var =~ s#/+$##; + if ($var !~ m#^[a-z\+]+://#) { + $var = '/' . $var if ($var !~ m#^/#); + unless ($url) { + print STDERR "E: '$var' is not a complete URL ", + "and a separate URL is not specified\n"; + exit 1; + } + $var = $url . $var; + } + chomp(my @ls = $_use_lib ? libsvn_ls_fullurl($var) + : safe_qx(qw/svn ls --non-interactive/, $var)); + my $old = $GIT_SVN; + defined(my $pid = fork) or croak $!; + if (!$pid) { + foreach my $u (map { "$var/$_" } (grep m!/$!, @ls)) { + $u =~ s#/+$##; + if ($u !~ m!\Q$var\E/(.+)$!) { + print STDERR "W: Unrecognized URL: $u\n"; + die "This should never happen\n"; + } + my $id = $pfx.$1; + print "init $u => $id\n"; + $GIT_SVN = $ENV{GIT_SVN_ID} = $id; + init_vars(); + init($u); + } + exit 0; + } + waitpid $pid, 0; + croak $? if $?; +} + +sub common_prefix { + my $paths = shift; + my %common; + foreach (@$paths) { + my @tmp = split m#/#, $_; + my $p = ''; + while (my $x = shift @tmp) { + $p .= "/$x"; + $common{$p} ||= 0; + $common{$p}++; + } + } + foreach (sort {length $b <=> length $a} keys %common) { + if ($common{$_} == @$paths) { + return $_; + } + } + return ''; +} + +# grafts set here are 'stronger' in that they're based on actual tree +# matches, and won't be deleted from merge-base checking in write_grafts() +sub graft_tree_joins { + my $grafts = shift; + map_tree_joins() if (@_branch_from && !%tree_map); + return unless %tree_map; + + git_svn_each(sub { + my $i = shift; + defined(my $pid = open my $fh, '-|') or croak $!; + if (!$pid) { + exec qw/git-rev-list --pretty=raw/, + "refs/remotes/$i" or croak $!; + } + while (<$fh>) { + next unless /^commit ($sha1)$/o; + my $c = $1; + my ($t) = (<$fh> =~ /^tree ($sha1)$/o); + next unless $tree_map{$t}; + + my $l; + do { + $l = readline $fh; + } until ($l =~ /^committer (?:.+) (\d+) ([\-\+]?\d+)$/); + + my ($s, $tz) = ($1, $2); + if ($tz =~ s/^\+//) { + $s += tz_to_s_offset($tz); + } elsif ($tz =~ s/^\-//) { + $s -= tz_to_s_offset($tz); + } + + my ($url_a, $r_a, $uuid_a) = cmt_metadata($c); + + foreach my $p (@{$tree_map{$t}}) { + next if $p eq $c; + my $mb = eval { + safe_qx('git-merge-base', $c, $p) + }; + next unless ($@ || $?); + if (defined $r_a) { + # see if SVN says it's a relative + my ($url_b, $r_b, $uuid_b) = + cmt_metadata($p); + next if (defined $url_b && + defined $url_a && + ($url_a eq $url_b) && + ($uuid_a eq $uuid_b)); + if ($uuid_a eq $uuid_b) { + if ($r_b < $r_a) { + $grafts->{$c}->{$p} = 2; + next; + } elsif ($r_b > $r_a) { + $grafts->{$p}->{$c} = 2; + next; + } + } + } + my $ct = get_commit_time($p); + if ($ct < $s) { + $grafts->{$c}->{$p} = 2; + } elsif ($ct > $s) { + $grafts->{$p}->{$c} = 2; + } + # what should we do when $ct == $s ? + } + } + close $fh or croak $?; + }); +} + +# this isn't funky-filename safe, but good enough for now... +sub graft_file_copy_cmd { + my ($grafts, $l_map, $u) = @_; + my $paths = $l_map->{$u}; + my $pfx = common_prefix([keys %$paths]); + $SVN_URL ||= $u.$pfx; + my $pid = open my $fh, '-|'; + defined $pid or croak $!; + unless ($pid) { + my @exec = qw/svn log -v/; + push @exec, "-r$_revision" if defined $_revision; + exec @exec, $u.$pfx or croak $!; + } + my ($r, $mp) = (undef, undef); + while (<$fh>) { + chomp; + if (/^\-{72}$/) { + $mp = $r = undef; + } elsif (/^r(\d+) \| /) { + $r = $1 unless defined $r; + } elsif (/^Changed paths:/) { + $mp = 1; + } elsif ($mp && m#^ [AR] /(\S.*?) \(from /(\S+?):(\d+)\)$#) { + my ($p1, $p0, $r0) = ($1, $2, $3); + my $c = find_graft_path_commit($paths, $p1, $r); + next unless $c; + find_graft_path_parents($grafts, $paths, $c, $p0, $r0); + } + } +} + +sub graft_file_copy_lib { + my ($grafts, $l_map, $u) = @_; + my $tree_paths = $l_map->{$u}; + my $pfx = common_prefix([keys %$tree_paths]); + my ($repo, $path) = repo_path_split($u.$pfx); + $SVN_LOG ||= libsvn_connect($repo); + $SVN ||= libsvn_connect($repo); + + my ($base, $head) = libsvn_parse_revision(); + my $inc = 1000; + my ($min, $max) = ($base, $head < $base+$inc ? $head : $base+$inc); + my $eh = $SVN::Error::handler; + $SVN::Error::handler = \&libsvn_skip_unknown_revs; + while (1) { + my $pool = SVN::Pool->new; + libsvn_get_log($SVN_LOG, "/$path", $min, $max, 0, 1, 1, + sub { + libsvn_graft_file_copies($grafts, $tree_paths, + $path, @_); + }, $pool); + $pool->clear; + last if ($max >= $head); + $min = $max + 1; + $max += $inc; + $max = $head if ($max > $head); + } + $SVN::Error::handler = $eh; +} + +sub process_merge_msg_matches { + my ($grafts, $l_map, $u, $p, $c, @matches) = @_; + my (@strong, @weak); + foreach (@matches) { + # merging with ourselves is not interesting + next if $_ eq $p; + if ($l_map->{$u}->{$_}) { + push @strong, $_; + } else { + push @weak, $_; + } + } + foreach my $w (@weak) { + last if @strong; + # no exact match, use branch name as regexp. + my $re = qr/\Q$w\E/i; + foreach (keys %{$l_map->{$u}}) { + if (/$re/) { + push @strong, $l_map->{$u}->{$_}; + last; + } + } + last if @strong; + $w = basename($w); + $re = qr/\Q$w\E/i; + foreach (keys %{$l_map->{$u}}) { + if (/$re/) { + push @strong, $l_map->{$u}->{$_}; + last; + } + } + } + my ($rev) = ($c->{m} =~ /^git-svn-id:\s(?:\S+?)\@(\d+) + \s(?:[a-f\d\-]+)$/xsm); + unless (defined $rev) { + ($rev) = ($c->{m} =~/^git-svn-id:\s(\d+) + \@(?:[a-f\d\-]+)/xsm); + return unless defined $rev; + } + foreach my $m (@strong) { + my ($r0, $s0) = find_rev_before($rev, $m, 1); + $grafts->{$c->{c}}->{$s0} = 1 if defined $s0; + } +} + +sub graft_merge_msg { + my ($grafts, $l_map, $u, $p, @re) = @_; + + my $x = $l_map->{$u}->{$p}; + my $rl = rev_list_raw($x); + while (my $c = next_rev_list_entry($rl)) { + foreach my $re (@re) { + my (@br) = ($c->{m} =~ /$re/g); + next unless @br; + process_merge_msg_matches($grafts,$l_map,$u,$p,$c,@br); + } + } +} + +sub read_uuid { + return if $SVN_UUID; + if ($_use_lib) { + my $pool = SVN::Pool->new; + $SVN_UUID = $SVN->get_uuid($pool); + $pool->clear; + } else { + my $info = shift || svn_info('.'); + $SVN_UUID = $info->{'Repository UUID'} or + croak "Repository UUID unreadable\n"; + } +} + +sub quiet_run { + my $pid = fork; + defined $pid or croak $!; + if (!$pid) { + open my $null, '>', '/dev/null' or croak $!; + open STDERR, '>&', $null or croak $!; + open STDOUT, '>&', $null or croak $!; + exec @_ or croak $!; + } + waitpid $pid, 0; + return $?; +} + +sub repo_path_split { + my $full_url = shift; + $full_url =~ s#/+$##; + + foreach (@repo_path_split_cache) { + if ($full_url =~ s#$_##) { + my $u = $1; + $full_url =~ s#^/+##; + return ($u, $full_url); + } + } + + my ($url, $path) = ($full_url =~ m!^([a-z\+]+://[^/]*)(.*)$!i); + $path =~ s#^/+##; + my @paths = split(m#/+#, $path); + + if ($_use_lib) { + while (1) { + $SVN = libsvn_connect($url); + last if (defined $SVN && + defined eval { $SVN->get_latest_revnum }); + my $n = shift @paths || last; + $url .= "/$n"; + } + } else { + while (quiet_run(qw/svn ls --non-interactive/, $url)) { + my $n = shift @paths || last; + $url .= "/$n"; + } + } + push @repo_path_split_cache, qr/^(\Q$url\E)/; + $path = join('/',@paths); + return ($url, $path); +} + +sub setup_git_svn { + defined $SVN_URL or croak "SVN repository location required\n"; + unless (-d $GIT_DIR) { + croak "GIT_DIR=$GIT_DIR does not exist!\n"; + } + mkpath([$GIT_SVN_DIR]); + mkpath(["$GIT_SVN_DIR/info"]); + open my $fh, '>>',$REVDB or croak $!; + close $fh; + s_to_file($SVN_URL,"$GIT_SVN_DIR/info/url"); + +} + +sub assert_svn_wc_clean { + return if $_use_lib; + my ($svn_rev) = @_; + croak "$svn_rev is not an integer!\n" unless ($svn_rev =~ /^\d+$/); + my $lcr = svn_info('.')->{'Last Changed Rev'}; + if ($svn_rev != $lcr) { + print STDERR "Checking for copy-tree ... "; + my @diff = grep(/^Index: /,(safe_qx(qw(svn diff), + "-r$lcr:$svn_rev"))); + if (@diff) { + croak "Nope! Expected r$svn_rev, got r$lcr\n"; + } else { + print STDERR "OK!\n"; + } + } + my @status = grep(!/^Performing status on external/,(`svn status`)); + @status = grep(!/^\s*$/,@status); + if (scalar @status) { + print STDERR "Tree ($SVN_WC) is not clean:\n"; + print STDERR $_ foreach @status; + croak; + } +} + +sub get_tree_from_treeish { + my ($treeish) = @_; + croak "Not a sha1: $treeish\n" unless $treeish =~ /^$sha1$/o; + chomp(my $type = `git-cat-file -t $treeish`); + my $expected; + while ($type eq 'tag') { + chomp(($treeish, $type) = `git-cat-file tag $treeish`); + } + if ($type eq 'commit') { + $expected = (grep /^tree /,`git-cat-file commit $treeish`)[0]; + ($expected) = ($expected =~ /^tree ($sha1)$/); + die "Unable to get tree from $treeish\n" unless $expected; + } elsif ($type eq 'tree') { + $expected = $treeish; + } else { + die "$treeish is a $type, expected tree, tag or commit\n"; + } + return $expected; +} + +sub assert_tree { + return if $_use_lib; + my ($treeish) = @_; + my $expected = get_tree_from_treeish($treeish); + + my $tmpindex = $GIT_SVN_INDEX.'.assert-tmp'; + if (-e $tmpindex) { + unlink $tmpindex or croak $!; + } + my $old_index = set_index($tmpindex); + index_changes(1); + chomp(my $tree = `git-write-tree`); + restore_index($old_index); + if ($tree ne $expected) { + croak "Tree mismatch, Got: $tree, Expected: $expected\n"; + } + unlink $tmpindex; +} + +sub parse_diff_tree { + my $diff_fh = shift; + local $/ = "\0"; + my $state = 'meta'; + my @mods; + while (<$diff_fh>) { + chomp $_; # this gets rid of the trailing "\0" + if ($state eq 'meta' && /^:(\d{6})\s(\d{6})\s + $sha1\s($sha1)\s([MTCRAD])\d*$/xo) { + push @mods, { mode_a => $1, mode_b => $2, + sha1_b => $3, chg => $4 }; + if ($4 =~ /^(?:C|R)$/) { + $state = 'file_a'; + } else { + $state = 'file_b'; + } + } elsif ($state eq 'file_a') { + my $x = $mods[$#mods] or croak "Empty array\n"; + if ($x->{chg} !~ /^(?:C|R)$/) { + croak "Error parsing $_, $x->{chg}\n"; + } + $x->{file_a} = $_; + $state = 'file_b'; + } elsif ($state eq 'file_b') { + my $x = $mods[$#mods] or croak "Empty array\n"; + if (exists $x->{file_a} && $x->{chg} !~ /^(?:C|R)$/) { + croak "Error parsing $_, $x->{chg}\n"; + } + if (!exists $x->{file_a} && $x->{chg} =~ /^(?:C|R)$/) { + croak "Error parsing $_, $x->{chg}\n"; + } + $x->{file_b} = $_; + $state = 'meta'; + } else { + croak "Error parsing $_\n"; + } + } + close $diff_fh or croak $?; + + return \@mods; +} + +sub svn_check_prop_executable { + my $m = shift; + return if -l $m->{file_b}; + if ($m->{mode_b} =~ /755$/) { + chmod((0755 &~ umask),$m->{file_b}) or croak $!; + if ($m->{mode_a} !~ /755$/) { + sys(qw(svn propset svn:executable 1), $m->{file_b}); + } + -x $m->{file_b} or croak "$m->{file_b} is not executable!\n"; + } elsif ($m->{mode_b} !~ /755$/ && $m->{mode_a} =~ /755$/) { + sys(qw(svn propdel svn:executable), $m->{file_b}); + chmod((0644 &~ umask),$m->{file_b}) or croak $!; + -x $m->{file_b} and croak "$m->{file_b} is executable!\n"; + } +} + +sub svn_ensure_parent_path { + my $dir_b = dirname(shift); + svn_ensure_parent_path($dir_b) if ($dir_b ne File::Spec->curdir); + mkpath([$dir_b]) unless (-d $dir_b); + sys(qw(svn add -N), $dir_b) unless (-d "$dir_b/.svn"); +} + +sub precommit_check { + my $mods = shift; + my (%rm_file, %rmdir_check, %added_check); + + my %o = ( D => 0, R => 1, C => 2, A => 3, M => 3, T => 3 ); + foreach my $m (sort { $o{$a->{chg}} <=> $o{$b->{chg}} } @$mods) { + if ($m->{chg} eq 'R') { + if (-d $m->{file_b}) { + err_dir_to_file("$m->{file_a} => $m->{file_b}"); + } + # dir/$file => dir/file/$file + my $dirname = dirname($m->{file_b}); + while ($dirname ne File::Spec->curdir) { + if ($dirname ne $m->{file_a}) { + $dirname = dirname($dirname); + next; + } + err_file_to_dir("$m->{file_a} => $m->{file_b}"); + } + # baz/zzz => baz (baz is a file) + $dirname = dirname($m->{file_a}); + while ($dirname ne File::Spec->curdir) { + if ($dirname ne $m->{file_b}) { + $dirname = dirname($dirname); + next; + } + err_dir_to_file("$m->{file_a} => $m->{file_b}"); + } + } + if ($m->{chg} =~ /^(D|R)$/) { + my $t = $1 eq 'D' ? 'file_b' : 'file_a'; + $rm_file{ $m->{$t} } = 1; + my $dirname = dirname( $m->{$t} ); + my $basename = basename( $m->{$t} ); + $rmdir_check{$dirname}->{$basename} = 1; + } elsif ($m->{chg} =~ /^(?:A|C)$/) { + if (-d $m->{file_b}) { + err_dir_to_file($m->{file_b}); + } + my $dirname = dirname( $m->{file_b} ); + my $basename = basename( $m->{file_b} ); + $added_check{$dirname}->{$basename} = 1; + while ($dirname ne File::Spec->curdir) { + if ($rm_file{$dirname}) { + err_file_to_dir($m->{file_b}); + } + $dirname = dirname $dirname; + } + } + } + return (\%rmdir_check, \%added_check); + + sub err_dir_to_file { + my $file = shift; + print STDERR "Node change from directory to file ", + "is not supported by Subversion: ",$file,"\n"; + exit 1; + } + sub err_file_to_dir { + my $file = shift; + print STDERR "Node change from file to directory ", + "is not supported by Subversion: ",$file,"\n"; + exit 1; + } +} + + +sub get_diff { + my ($from, $treeish) = @_; + assert_tree($from); + print "diff-tree $from $treeish\n"; + my $pid = open my $diff_fh, '-|'; + defined $pid or croak $!; + if ($pid == 0) { + my @diff_tree = qw(git-diff-tree -z -r); + if ($_cp_similarity) { + push @diff_tree, "-C$_cp_similarity"; + } else { + push @diff_tree, '-C'; + } + push @diff_tree, '--find-copies-harder' if $_find_copies_harder; + push @diff_tree, "-l$_l" if defined $_l; + exec(@diff_tree, $from, $treeish) or croak $!; + } + return parse_diff_tree($diff_fh); +} + +sub svn_checkout_tree { + my ($from, $treeish) = @_; + my $mods = get_diff($from->{commit}, $treeish); + return $mods unless (scalar @$mods); + my ($rm, $add) = precommit_check($mods); + + my %o = ( D => 1, R => 0, C => -1, A => 3, M => 3, T => 3 ); + foreach my $m (sort { $o{$a->{chg}} <=> $o{$b->{chg}} } @$mods) { + if ($m->{chg} eq 'C') { + svn_ensure_parent_path( $m->{file_b} ); + sys(qw(svn cp), $m->{file_a}, $m->{file_b}); + apply_mod_line_blob($m); + svn_check_prop_executable($m); + } elsif ($m->{chg} eq 'D') { + sys(qw(svn rm --force), $m->{file_b}); + } elsif ($m->{chg} eq 'R') { + svn_ensure_parent_path( $m->{file_b} ); + sys(qw(svn mv --force), $m->{file_a}, $m->{file_b}); + apply_mod_line_blob($m); + svn_check_prop_executable($m); + } elsif ($m->{chg} eq 'M') { + apply_mod_line_blob($m); + svn_check_prop_executable($m); + } elsif ($m->{chg} eq 'T') { + sys(qw(svn rm --force),$m->{file_b}); + apply_mod_line_blob($m); + sys(qw(svn add), $m->{file_b}); + svn_check_prop_executable($m); + } elsif ($m->{chg} eq 'A') { + svn_ensure_parent_path( $m->{file_b} ); + apply_mod_line_blob($m); + sys(qw(svn add), $m->{file_b}); + svn_check_prop_executable($m); + } else { + croak "Invalid chg: $m->{chg}\n"; + } + } + + assert_tree($treeish); + if ($_rmdir) { # remove empty directories + handle_rmdir($rm, $add); + } + assert_tree($treeish); + return $mods; +} + +sub libsvn_checkout_tree { + my ($from, $treeish, $ed) = @_; + my $mods = get_diff($from, $treeish); + return $mods unless (scalar @$mods); + my %o = ( D => 1, R => 0, C => -1, A => 3, M => 3, T => 3 ); + foreach my $m (sort { $o{$a->{chg}} <=> $o{$b->{chg}} } @$mods) { + my $f = $m->{chg}; + if (defined $o{$f}) { + $ed->$f($m, $_q); + } else { + croak "Invalid change type: $f\n"; + } + } + $ed->rmdirs($_q) if $_rmdir; + return $mods; +} + +# svn ls doesn't work with respect to the current working tree, but what's +# in the repository. There's not even an option for it... *sigh* +# (added files don't show up and removed files remain in the ls listing) +sub svn_ls_current { + my ($dir, $rm, $add) = @_; + chomp(my @ls = safe_qx('svn','ls',$dir)); + my @ret = (); + foreach (@ls) { + s#/$##; # trailing slashes are evil + push @ret, $_ unless $rm->{$dir}->{$_}; + } + if (exists $add->{$dir}) { + push @ret, keys %{$add->{$dir}}; + } + return \@ret; +} + +sub handle_rmdir { + my ($rm, $add) = @_; + + foreach my $dir (sort {length $b <=> length $a} keys %$rm) { + my $ls = svn_ls_current($dir, $rm, $add); + next if (scalar @$ls); + sys(qw(svn rm --force),$dir); + + my $dn = dirname $dir; + $rm->{ $dn }->{ basename $dir } = 1; + $ls = svn_ls_current($dn, $rm, $add); + while (scalar @$ls == 0 && $dn ne File::Spec->curdir) { + sys(qw(svn rm --force),$dn); + $dir = basename $dn; + $dn = dirname $dn; + $rm->{ $dn }->{ $dir } = 1; + $ls = svn_ls_current($dn, $rm, $add); + } + } +} + +sub get_commit_message { + my ($commit, $commit_msg) = (@_); + my %log_msg = ( msg => '' ); + open my $msg, '>', $commit_msg or croak $!; + + chomp(my $type = `git-cat-file -t $commit`); + if ($type eq 'commit') { + my $pid = open my $msg_fh, '-|'; + defined $pid or croak $!; + + if ($pid == 0) { + exec(qw(git-cat-file commit), $commit) or croak $!; + } + my $in_msg = 0; + while (<$msg_fh>) { + if (!$in_msg) { + $in_msg = 1 if (/^\s*$/); + } elsif (/^git-svn-id: /) { + # skip this, we regenerate the correct one + # on re-fetch anyways + } else { + print $msg $_ or croak $!; + } + } + close $msg_fh or croak $?; + } + close $msg or croak $!; + + if ($_edit || ($type eq 'tree')) { + my $editor = $ENV{VISUAL} || $ENV{EDITOR} || 'vi'; + system($editor, $commit_msg); + } + + # file_to_s removes all trailing newlines, so just use chomp() here: + open $msg, '<', $commit_msg or croak $!; + { local $/; chomp($log_msg{msg} = <$msg>); } + close $msg or croak $!; + + return \%log_msg; +} + +sub set_svn_commit_env { + if (defined $LC_ALL) { + $ENV{LC_ALL} = $LC_ALL; + } else { + delete $ENV{LC_ALL}; + } +} + +sub svn_commit_tree { + my ($last, $commit) = @_; + my $commit_msg = "$GIT_SVN_DIR/.svn-commit.tmp.$$"; + my $log_msg = get_commit_message($commit, $commit_msg); + my ($oneline) = ($log_msg->{msg} =~ /([^\n\r]+)/); + print "Committing $commit: $oneline\n"; + + set_svn_commit_env(); + my @ci_output = safe_qx(qw(svn commit -F),$commit_msg); + $ENV{LC_ALL} = 'C'; + unlink $commit_msg; + my ($committed) = ($ci_output[$#ci_output] =~ /(\d+)/); + if (!defined $committed) { + my $out = join("\n",@ci_output); + print STDERR "W: Trouble parsing \`svn commit' output:\n\n", + $out, "\n\nAssuming English locale..."; + ($committed) = ($out =~ /^Committed revision \d+\./sm); + defined $committed or die " FAILED!\n", + "Commit output failed to parse committed revision!\n", + print STDERR " OK\n"; + } + + my @svn_up = qw(svn up); + push @svn_up, '--ignore-externals' unless $_no_ignore_ext; + if ($_optimize_commits && ($committed == ($last->{revision} + 1))) { + push @svn_up, "-r$committed"; + sys(@svn_up); + my $info = svn_info('.'); + my $date = $info->{'Last Changed Date'} or die "Missing date\n"; + if ($info->{'Last Changed Rev'} != $committed) { + croak "$info->{'Last Changed Rev'} != $committed\n" + } + my ($Y,$m,$d,$H,$M,$S,$tz) = ($date =~ + /(\d{4})\-(\d\d)\-(\d\d)\s + (\d\d)\:(\d\d)\:(\d\d)\s([\-\+]\d+)/x) + or croak "Failed to parse date: $date\n"; + $log_msg->{date} = "$tz $Y-$m-$d $H:$M:$S"; + $log_msg->{author} = $info->{'Last Changed Author'}; + $log_msg->{revision} = $committed; + $log_msg->{msg} .= "\n"; + $log_msg->{parents} = [ $last->{commit} ]; + $log_msg->{commit} = git_commit($log_msg, $commit); + return $log_msg; + } + # resync immediately + push @svn_up, "-r$last->{revision}"; + sys(@svn_up); + return fetch("$committed=$commit"); +} + +sub rev_list_raw { + my (@args) = @_; + my $pid = open my $fh, '-|'; + defined $pid or croak $!; + if (!$pid) { + exec(qw/git-rev-list --pretty=raw/, @args) or croak $!; + } + return { fh => $fh, t => { } }; +} + +sub next_rev_list_entry { + my $rl = shift; + my $fh = $rl->{fh}; + my $x = $rl->{t}; + while (<$fh>) { + if (/^commit ($sha1)$/o) { + if ($x->{c}) { + $rl->{t} = { c => $1 }; + return $x; + } else { + $x->{c} = $1; + } + } elsif (/^parent ($sha1)$/o) { + $x->{p}->{$1} = 1; + } elsif (s/^ //) { + $x->{m} ||= ''; + $x->{m} .= $_; + } + } + return ($x != $rl->{t}) ? $x : undef; +} + +# read the entire log into a temporary file (which is removed ASAP) +# and store the file handle + parser state +sub svn_log_raw { + my (@log_args) = @_; + my $log_fh = IO::File->new_tmpfile or croak $!; + my $pid = fork; + defined $pid or croak $!; + if (!$pid) { + open STDOUT, '>&', $log_fh or croak $!; + exec (qw(svn log), @log_args) or croak $! + } + waitpid $pid, 0; + croak $? if $?; + seek $log_fh, 0, 0 or croak $!; + return { state => 'sep', fh => $log_fh }; +} + +sub next_log_entry { + my $log = shift; # retval of svn_log_raw() + my $ret = undef; + my $fh = $log->{fh}; + + while (<$fh>) { + chomp; + if (/^\-{72}$/) { + if ($log->{state} eq 'msg') { + if ($ret->{lines}) { + $ret->{msg} .= $_."\n"; + unless(--$ret->{lines}) { + $log->{state} = 'sep'; + } + } else { + croak "Log parse error at: $_\n", + $ret->{revision}, + "\n"; + } + next; + } + if ($log->{state} ne 'sep') { + croak "Log parse error at: $_\n", + "state: $log->{state}\n", + $ret->{revision}, + "\n"; + } + $log->{state} = 'rev'; + + # if we have an empty log message, put something there: + if ($ret) { + $ret->{msg} ||= "\n"; + delete $ret->{lines}; + return $ret; + } + next; + } + if ($log->{state} eq 'rev' && s/^r(\d+)\s*\|\s*//) { + my $rev = $1; + my ($author, $date, $lines) = split(/\s*\|\s*/, $_, 3); + ($lines) = ($lines =~ /(\d+)/); + my ($Y,$m,$d,$H,$M,$S,$tz) = ($date =~ + /(\d{4})\-(\d\d)\-(\d\d)\s + (\d\d)\:(\d\d)\:(\d\d)\s([\-\+]\d+)/x) + or croak "Failed to parse date: $date\n"; + $ret = { revision => $rev, + date => "$tz $Y-$m-$d $H:$M:$S", + author => $author, + lines => $lines, + msg => '' }; + if (defined $_authors && ! defined $users{$author}) { + die "Author: $author not defined in ", + "$_authors file\n"; + } + $log->{state} = 'msg_start'; + next; + } + # skip the first blank line of the message: + if ($log->{state} eq 'msg_start' && /^$/) { + $log->{state} = 'msg'; + } elsif ($log->{state} eq 'msg') { + if ($ret->{lines}) { + $ret->{msg} .= $_."\n"; + unless (--$ret->{lines}) { + $log->{state} = 'sep'; + } + } else { + croak "Log parse error at: $_\n", + $ret->{revision},"\n"; + } + } + } + return $ret; +} + +sub svn_info { + my $url = shift || $SVN_URL; + + my $pid = open my $info_fh, '-|'; + defined $pid or croak $!; + + if ($pid == 0) { + exec(qw(svn info),$url) or croak $!; + } + + my $ret = {}; + # only single-lines seem to exist in svn info output + while (<$info_fh>) { + chomp $_; + if (m#^([^:]+)\s*:\s*(\S.*)$#) { + $ret->{$1} = $2; + push @{$ret->{-order}}, $1; + } + } + close $info_fh or croak $?; + return $ret; +} + +sub sys { system(@_) == 0 or croak $? } + +sub eol_cp { + my ($from, $to) = @_; + my $es = svn_propget_base('svn:eol-style', $to); + open my $rfd, '<', $from or croak $!; + binmode $rfd or croak $!; + open my $wfd, '>', $to or croak $!; + binmode $wfd or croak $!; + eol_cp_fd($rfd, $wfd, $es); + close $rfd or croak $!; + close $wfd or croak $!; +} + +sub eol_cp_fd { + my ($rfd, $wfd, $es) = @_; + my $eol = defined $es ? $EOL{$es} : undef; + my $buf; + use bytes; + while (1) { + my ($r, $w, $t); + defined($r = sysread($rfd, $buf, 4096)) or croak $!; + return unless $r; + if ($eol) { + if ($buf =~ /\015$/) { + my $c; + defined($r = sysread($rfd,$c,1)) or croak $!; + $buf .= $c if $r > 0; + } + $buf =~ s/(?:\015\012|\015|\012)/$eol/gs; + $r = length($buf); + } + for ($w = 0; $w < $r; $w += $t) { + $t = syswrite($wfd, $buf, $r - $w, $w) or croak $!; + } + } + no bytes; +} + +sub do_update_index { + my ($z_cmd, $cmd, $no_text_base) = @_; + + my $z = open my $p, '-|'; + defined $z or croak $!; + unless ($z) { exec @$z_cmd or croak $! } + + my $pid = open my $ui, '|-'; + defined $pid or croak $!; + unless ($pid) { + exec('git-update-index',"--$cmd",'-z','--stdin') or croak $!; + } + local $/ = "\0"; + while (my $x = <$p>) { + chomp $x; + if (!$no_text_base && lstat $x && ! -l _ && + svn_propget_base('svn:keywords', $x)) { + my $mode = -x _ ? 0755 : 0644; + my ($v,$d,$f) = File::Spec->splitpath($x); + my $tb = File::Spec->catfile($d, '.svn', 'tmp', + 'text-base',"$f.svn-base"); + $tb =~ s#^/##; + unless (-f $tb) { + $tb = File::Spec->catfile($d, '.svn', + 'text-base',"$f.svn-base"); + $tb =~ s#^/##; + } + unlink $x or croak $!; + eol_cp($tb, $x); + chmod(($mode &~ umask), $x) or croak $!; + } + print $ui $x,"\0"; + } + close $ui or croak $?; +} + +sub index_changes { + return if $_use_lib; + + if (!-f "$GIT_SVN_DIR/info/exclude") { + open my $fd, '>>', "$GIT_SVN_DIR/info/exclude" or croak $!; + print $fd '.svn',"\n"; + close $fd or croak $!; + } + my $no_text_base = shift; + do_update_index([qw/git-diff-files --name-only -z/], + 'remove', + $no_text_base); + do_update_index([qw/git-ls-files -z --others/, + "--exclude-from=$GIT_SVN_DIR/info/exclude"], + 'add', + $no_text_base); +} + +sub s_to_file { + my ($str, $file, $mode) = @_; + open my $fd,'>',$file or croak $!; + print $fd $str,"\n" or croak $!; + close $fd or croak $!; + chmod ($mode &~ umask, $file) if (defined $mode); +} + +sub file_to_s { + my $file = shift; + open my $fd,'<',$file or croak "$!: file: $file\n"; + local $/; + my $ret = <$fd>; + close $fd or croak $!; + $ret =~ s/\s*$//s; + return $ret; +} + +sub assert_revision_unknown { + my $r = shift; + if (my $c = revdb_get($REVDB, $r)) { + croak "$r = $c already exists! Why are we refetching it?"; + } +} + +sub trees_eq { + my ($x, $y) = @_; + my @x = safe_qx('git-cat-file','commit',$x); + my @y = safe_qx('git-cat-file','commit',$y); + if (($y[0] ne $x[0]) || $x[0] !~ /^tree $sha1\n$/ + || $y[0] !~ /^tree $sha1\n$/) { + print STDERR "Trees not equal: $y[0] != $x[0]\n"; + return 0 + } + return 1; +} + +sub git_commit { + my ($log_msg, @parents) = @_; + assert_revision_unknown($log_msg->{revision}); + map_tree_joins() if (@_branch_from && !%tree_map); + + my (@tmp_parents, @exec_parents, %seen_parent); + if (my $lparents = $log_msg->{parents}) { + @tmp_parents = @$lparents + } + # commit parents can be conditionally bound to a particular + # svn revision via: "svn_revno=commit_sha1", filter them out here: + foreach my $p (@parents) { + next unless defined $p; + if ($p =~ /^(\d+)=($sha1_short)$/o) { + if ($1 == $log_msg->{revision}) { + push @tmp_parents, $2; + } + } else { + push @tmp_parents, $p if $p =~ /$sha1_short/o; + } + } + my $tree = $log_msg->{tree}; + if (!defined $tree) { + my $index = set_index($GIT_SVN_INDEX); + index_changes(); + chomp($tree = `git-write-tree`); + croak $? if $?; + restore_index($index); + } + + # just in case we clobber the existing ref, we still want that ref + # as our parent: + if (my $cur = eval { file_to_s("$GIT_DIR/refs/remotes/$GIT_SVN") }) { + push @tmp_parents, $cur; + } + + if (exists $tree_map{$tree}) { + foreach my $p (@{$tree_map{$tree}}) { + my $skip; + foreach (@tmp_parents) { + # see if a common parent is found + my $mb = eval { + safe_qx('git-merge-base', $_, $p) + }; + next if ($@ || $?); + $skip = 1; + last; + } + next if $skip; + my ($url_p, $r_p, $uuid_p) = cmt_metadata($p); + next if (($SVN_UUID eq $uuid_p) && + ($log_msg->{revision} > $r_p)); + next if (defined $url_p && defined $SVN_URL && + ($SVN_UUID eq $uuid_p) && + ($url_p eq $SVN_URL)); + push @tmp_parents, $p; + } + } + foreach (@tmp_parents) { + next if $seen_parent{$_}; + $seen_parent{$_} = 1; + push @exec_parents, $_; + # MAXPARENT is defined to 16 in commit-tree.c: + last if @exec_parents > 16; + } + + set_commit_env($log_msg); + my @exec = ('git-commit-tree', $tree); + push @exec, '-p', $_ foreach @exec_parents; + defined(my $pid = open3(my $msg_fh, my $out_fh, '>&STDERR', @exec)) + or croak $!; + print $msg_fh $log_msg->{msg} or croak $!; + unless ($_no_metadata) { + print $msg_fh "\ngit-svn-id: $SVN_URL\@$log_msg->{revision}", + " $SVN_UUID\n" or croak $!; + } + $msg_fh->flush == 0 or croak $!; + close $msg_fh or croak $!; + chomp(my $commit = do { local $/; <$out_fh> }); + close $out_fh or croak $!; + waitpid $pid, 0; + croak $? if $?; + if ($commit !~ /^$sha1$/o) { + die "Failed to commit, invalid sha1: $commit\n"; + } + sys('git-update-ref',"refs/remotes/$GIT_SVN",$commit); + revdb_set($REVDB, $log_msg->{revision}, $commit); + + # this output is read via pipe, do not change: + print "r$log_msg->{revision} = $commit\n"; + check_repack(); + return $commit; +} + +sub check_repack { + if ($_repack && (--$_repack_nr == 0)) { + $_repack_nr = $_repack; + sys("git repack $_repack_flags"); + } +} + +sub set_commit_env { + my ($log_msg) = @_; + my $author = $log_msg->{author}; + if (!defined $author || length $author == 0) { + $author = '(no author)'; + } + my ($name,$email) = defined $users{$author} ? @{$users{$author}} + : ($author,"$author\@$SVN_UUID"); + $ENV{GIT_AUTHOR_NAME} = $ENV{GIT_COMMITTER_NAME} = $name; + $ENV{GIT_AUTHOR_EMAIL} = $ENV{GIT_COMMITTER_EMAIL} = $email; + $ENV{GIT_AUTHOR_DATE} = $ENV{GIT_COMMITTER_DATE} = $log_msg->{date}; +} + +sub apply_mod_line_blob { + my $m = shift; + if ($m->{mode_b} =~ /^120/) { + blob_to_symlink($m->{sha1_b}, $m->{file_b}); + } else { + blob_to_file($m->{sha1_b}, $m->{file_b}); + } +} + +sub blob_to_symlink { + my ($blob, $link) = @_; + defined $link or croak "\$link not defined!\n"; + croak "Not a sha1: $blob\n" unless $blob =~ /^$sha1$/o; + if (-l $link || -f _) { + unlink $link or croak $!; + } + + my $dest = `git-cat-file blob $blob`; # no newline, so no chomp + symlink $dest, $link or croak $!; +} + +sub blob_to_file { + my ($blob, $file) = @_; + defined $file or croak "\$file not defined!\n"; + croak "Not a sha1: $blob\n" unless $blob =~ /^$sha1$/o; + if (-l $file || -f _) { + unlink $file or croak $!; + } + + open my $blob_fh, '>', $file or croak "$!: $file\n"; + my $pid = fork; + defined $pid or croak $!; + + if ($pid == 0) { + open STDOUT, '>&', $blob_fh or croak $!; + exec('git-cat-file','blob',$blob) or croak $!; + } + waitpid $pid, 0; + croak $? if $?; + + close $blob_fh or croak $!; +} + +sub safe_qx { + my $pid = open my $child, '-|'; + defined $pid or croak $!; + if ($pid == 0) { + exec(@_) or croak $!; + } + my @ret = (<$child>); + close $child or croak $?; + die $? if $?; # just in case close didn't error out + return wantarray ? @ret : join('',@ret); +} + +sub svn_compat_check { + if ($_follow_parent) { + print STDERR 'E: --follow-parent functionality is only ', + "available when SVN libraries are used\n"; + exit 1; + } + my @co_help = safe_qx(qw(svn co -h)); + unless (grep /ignore-externals/,@co_help) { + print STDERR "W: Installed svn version does not support ", + "--ignore-externals\n"; + $_no_ignore_ext = 1; + } + if (grep /usage: checkout URL\[\@REV\]/,@co_help) { + $_svn_co_url_revs = 1; + } + if (grep /\[TARGET\[\@REV\]\.\.\.\]/, `svn propget -h`) { + $_svn_pg_peg_revs = 1; + } + + # I really, really hope nobody hits this... + unless (grep /stop-on-copy/, (safe_qx(qw(svn log -h)))) { + print STDERR <<''; +W: The installed svn version does not support the --stop-on-copy flag in + the log command. + Lets hope the directory you're tracking is not a branch or tag + and was never moved within the repository... + + $_no_stop_copy = 1; + } +} + +# *sigh*, new versions of svn won't honor -r<rev> without URL@<rev>, +# (and they won't honor URL@<rev> without -r<rev>, too!) +sub svn_cmd_checkout { + my ($url, $rev, $dir) = @_; + my @cmd = ('svn','co', "-r$rev"); + push @cmd, '--ignore-externals' unless $_no_ignore_ext; + $url .= "\@$rev" if $_svn_co_url_revs; + sys(@cmd, $url, $dir); +} + +sub check_upgrade_needed { + if (!-r $REVDB) { + -d $GIT_SVN_DIR or mkpath([$GIT_SVN_DIR]); + open my $fh, '>>',$REVDB or croak $!; + close $fh; + } + my $old = eval { + my $pid = open my $child, '-|'; + defined $pid or croak $!; + if ($pid == 0) { + close STDERR; + exec('git-rev-parse',"$GIT_SVN-HEAD") or croak $!; + } + my @ret = (<$child>); + close $child or croak $?; + die $? if $?; # just in case close didn't error out + return wantarray ? @ret : join('',@ret); + }; + return unless $old; + my $head = eval { safe_qx('git-rev-parse',"refs/remotes/$GIT_SVN") }; + if ($@ || !$head) { + print STDERR "Please run: $0 rebuild --upgrade\n"; + exit 1; + } +} + +# fills %tree_map with a reverse mapping of trees to commits. Useful +# for finding parents to commit on. +sub map_tree_joins { + my %seen; + foreach my $br (@_branch_from) { + my $pid = open my $pipe, '-|'; + defined $pid or croak $!; + if ($pid == 0) { + exec(qw(git-rev-list --topo-order --pretty=raw), $br) + or croak $!; + } + while (<$pipe>) { + if (/^commit ($sha1)$/o) { + my $commit = $1; + + # if we've seen a commit, + # we've seen its parents + last if $seen{$commit}; + my ($tree) = (<$pipe> =~ /^tree ($sha1)$/o); + unless (defined $tree) { + die "Failed to parse commit $commit\n"; + } + push @{$tree_map{$tree}}, $commit; + $seen{$commit} = 1; + } + } + close $pipe; # we could be breaking the pipe early + } +} + +sub load_all_refs { + if (@_branch_from) { + print STDERR '--branch|-b parameters are ignored when ', + "--branch-all-refs|-B is passed\n"; + } + + # don't worry about rev-list on non-commit objects/tags, + # it shouldn't blow up if a ref is a blob or tree... + chomp(@_branch_from = `git-rev-parse --symbolic --all`); +} + +# '<svn username> = real-name <email address>' mapping based on git-svnimport: +sub load_authors { + open my $authors, '<', $_authors or die "Can't open $_authors $!\n"; + while (<$authors>) { + chomp; + next unless /^(\S+?)\s*=\s*(.+?)\s*<(.+)>\s*$/; + my ($user, $name, $email) = ($1, $2, $3); + $users{$user} = [$name, $email]; + } + close $authors or croak $!; +} + +sub rload_authors { + open my $authors, '<', $_authors or die "Can't open $_authors $!\n"; + while (<$authors>) { + chomp; + next unless /^(\S+?)\s*=\s*(.+?)\s*<(.+)>\s*$/; + my ($user, $name, $email) = ($1, $2, $3); + $rusers{"$name <$email>"} = $user; + } + close $authors or croak $!; +} + +sub svn_propget_base { + my ($p, $f) = @_; + $f .= '@BASE' if $_svn_pg_peg_revs; + return safe_qx(qw/svn propget/, $p, $f); +} + +sub git_svn_each { + my $sub = shift; + foreach (`git-rev-parse --symbolic --all`) { + next unless s#^refs/remotes/##; + chomp $_; + next unless -f "$GIT_DIR/svn/$_/info/url"; + &$sub($_); + } +} + +sub migrate_revdb { + git_svn_each(sub { + my $id = shift; + defined(my $pid = fork) or croak $!; + if (!$pid) { + $GIT_SVN = $ENV{GIT_SVN_ID} = $id; + init_vars(); + exit 0 if -r $REVDB; + print "Upgrading svn => git mapping...\n"; + -d $GIT_SVN_DIR or mkpath([$GIT_SVN_DIR]); + open my $fh, '>>',$REVDB or croak $!; + close $fh; + rebuild(); + print "Done upgrading. You may now delete the ", + "deprecated $GIT_SVN_DIR/revs directory\n"; + exit 0; + } + waitpid $pid, 0; + croak $? if $?; + }); +} + +sub migration_check { + migrate_revdb() unless (-e $REVDB); + return if (-d "$GIT_DIR/svn" || !-d $GIT_DIR); + print "Upgrading repository...\n"; + unless (-d "$GIT_DIR/svn") { + mkdir "$GIT_DIR/svn" or croak $!; + } + print "Data from a previous version of git-svn exists, but\n\t", + "$GIT_SVN_DIR\n\t(required for this version ", + "($VERSION) of git-svn) does not.\n"; + + foreach my $x (`git-rev-parse --symbolic --all`) { + next unless $x =~ s#^refs/remotes/##; + chomp $x; + next unless -f "$GIT_DIR/$x/info/url"; + my $u = eval { file_to_s("$GIT_DIR/$x/info/url") }; + next unless $u; + my $dn = dirname("$GIT_DIR/svn/$x"); + mkpath([$dn]) unless -d $dn; + rename "$GIT_DIR/$x", "$GIT_DIR/svn/$x" or croak "$!: $x"; + } + migrate_revdb() if (-d $GIT_SVN_DIR && !-w $REVDB); + print "Done upgrading.\n"; +} + +sub find_rev_before { + my ($r, $id, $eq_ok) = @_; + my $f = "$GIT_DIR/svn/$id/.rev_db"; + return (undef,undef) unless -r $f; + --$r unless $eq_ok; + while ($r > 0) { + if (my $c = revdb_get($f, $r)) { + return ($r, $c); + } + --$r; + } + return (undef, undef); +} + +sub init_vars { + $GIT_SVN ||= $ENV{GIT_SVN_ID} || 'git-svn'; + $GIT_SVN_DIR = "$GIT_DIR/svn/$GIT_SVN"; + $REVDB = "$GIT_SVN_DIR/.rev_db"; + $GIT_SVN_INDEX = "$GIT_SVN_DIR/index"; + $SVN_URL = undef; + $SVN_WC = "$GIT_SVN_DIR/tree"; + %tree_map = (); +} + +# convert GetOpt::Long specs for use by git-repo-config +sub read_repo_config { + return unless -d $GIT_DIR; + my $opts = shift; + foreach my $o (keys %$opts) { + my $v = $opts->{$o}; + my ($key) = ($o =~ /^([a-z\-]+)/); + $key =~ s/-//g; + my $arg = 'git-repo-config'; + $arg .= ' --int' if ($o =~ /[:=]i$/); + $arg .= ' --bool' if ($o !~ /[:=][sfi]$/); + if (ref $v eq 'ARRAY') { + chomp(my @tmp = `$arg --get-all svn.$key`); + @$v = @tmp if @tmp; + } else { + chomp(my $tmp = `$arg --get svn.$key`); + if ($tmp && !($arg =~ / --bool / && $tmp eq 'false')) { + $$v = $tmp; + } + } + } +} + +sub set_default_vals { + if (defined $_repack) { + $_repack = 1000 if ($_repack <= 0); + $_repack_nr = $_repack; + $_repack_flags ||= '-d'; + } +} + +sub read_grafts { + my $gr_file = shift; + my ($grafts, $comments) = ({}, {}); + if (open my $fh, '<', $gr_file) { + my @tmp; + while (<$fh>) { + if (/^($sha1)\s+/) { + my $c = $1; + if (@tmp) { + @{$comments->{$c}} = @tmp; + @tmp = (); + } + foreach my $p (split /\s+/, $_) { + $grafts->{$c}->{$p} = 1; + } + } else { + push @tmp, $_; + } + } + close $fh or croak $!; + @{$comments->{'END'}} = @tmp if @tmp; + } + return ($grafts, $comments); +} + +sub write_grafts { + my ($grafts, $comments, $gr_file) = @_; + + open my $fh, '>', $gr_file or croak $!; + foreach my $c (sort keys %$grafts) { + if ($comments->{$c}) { + print $fh $_ foreach @{$comments->{$c}}; + } + my $p = $grafts->{$c}; + my %x; # real parents + delete $p->{$c}; # commits are not self-reproducing... + my $pid = open my $ch, '-|'; + defined $pid or croak $!; + if (!$pid) { + exec(qw/git-cat-file commit/, $c) or croak $!; + } + while (<$ch>) { + if (/^parent ($sha1)/) { + $x{$1} = $p->{$1} = 1; + } else { + last unless /^\S/; + } + } + close $ch; # breaking the pipe + + # if real parents are the only ones in the grafts, drop it + next if join(' ',sort keys %$p) eq join(' ',sort keys %x); + + my (@ip, @jp, $mb); + my %del = %x; + @ip = @jp = keys %$p; + foreach my $i (@ip) { + next if $del{$i} || $p->{$i} == 2; + foreach my $j (@jp) { + next if $i eq $j || $del{$j} || $p->{$j} == 2; + $mb = eval { safe_qx('git-merge-base',$i,$j) }; + next unless $mb; + chomp $mb; + next if $x{$mb}; + if ($mb eq $j) { + delete $p->{$i}; + $del{$i} = 1; + } elsif ($mb eq $i) { + delete $p->{$j}; + $del{$j} = 1; + } + } + } + + # if real parents are the only ones in the grafts, drop it + next if join(' ',sort keys %$p) eq join(' ',sort keys %x); + + print $fh $c, ' ', join(' ', sort keys %$p),"\n"; + } + if ($comments->{'END'}) { + print $fh $_ foreach @{$comments->{'END'}}; + } + close $fh or croak $!; +} + +sub read_url_paths_all { + my ($l_map, $pfx, $p) = @_; + my @dir; + foreach (<$p/*>) { + if (-r "$_/info/url") { + $pfx .= '/' if $pfx && $pfx !~ m!/$!; + my $id = $pfx . basename $_; + my $url = file_to_s("$_/info/url"); + my ($u, $p) = repo_path_split($url); + $l_map->{$u}->{$p} = $id; + } elsif (-d $_) { + push @dir, $_; + } + } + foreach (@dir) { + my $x = $_; + $x =~ s!^\Q$GIT_DIR\E/svn/!!o; + read_url_paths_all($l_map, $x, $_); + } +} + +# this one only gets ids that have been imported, not new ones +sub read_url_paths { + my $l_map = {}; + git_svn_each(sub { my $x = shift; + my $url = file_to_s("$GIT_DIR/svn/$x/info/url"); + my ($u, $p) = repo_path_split($url); + $l_map->{$u}->{$p} = $x; + }); + return $l_map; +} + +sub extract_metadata { + my $id = shift or return (undef, undef, undef); + my ($url, $rev, $uuid) = ($id =~ /^git-svn-id:\s(\S+?)\@(\d+) + \s([a-f\d\-]+)$/x); + if (!$rev || !$uuid || !$url) { + # some of the original repositories I made had + # indentifiers like this: + ($rev, $uuid) = ($id =~/^git-svn-id:\s(\d+)\@([a-f\d\-]+)/); + } + return ($url, $rev, $uuid); +} + +sub cmt_metadata { + return extract_metadata((grep(/^git-svn-id: /, + safe_qx(qw/git-cat-file commit/, shift)))[-1]); +} + +sub get_commit_time { + my $cmt = shift; + defined(my $pid = open my $fh, '-|') or croak $!; + if (!$pid) { + exec qw/git-rev-list --pretty=raw -n1/, $cmt or croak $!; + } + while (<$fh>) { + /^committer\s(?:.+) (\d+) ([\-\+]?\d+)$/ or next; + my ($s, $tz) = ($1, $2); + if ($tz =~ s/^\+//) { + $s += tz_to_s_offset($tz); + } elsif ($tz =~ s/^\-//) { + $s -= tz_to_s_offset($tz); + } + close $fh; + return $s; + } + die "Can't get commit time for commit: $cmt\n"; +} + +sub tz_to_s_offset { + my ($tz) = @_; + $tz =~ s/(\d\d)$//; + return ($1 * 60) + ($tz * 3600); +} + +sub setup_pager { # translated to Perl from pager.c + return unless (-t *STDOUT); + my $pager = $ENV{PAGER}; + if (!defined $pager) { + $pager = 'less'; + } elsif (length $pager == 0 || $pager eq 'cat') { + return; + } + pipe my $rfd, my $wfd or return; + defined(my $pid = fork) or croak $!; + if (!$pid) { + open STDOUT, '>&', $wfd or croak $!; + return; + } + open STDIN, '<&', $rfd or croak $!; + $ENV{LESS} ||= '-S'; + exec $pager or croak "Can't run pager: $!\n";; +} + +sub get_author_info { + my ($dest, $author, $t, $tz) = @_; + $author =~ s/(?:^\s*|\s*$)//g; + $dest->{a_raw} = $author; + my $_a; + if ($_authors) { + $_a = $rusers{$author} || undef; + } + if (!$_a) { + ($_a) = ($author =~ /<([^>]+)\@[^>]+>$/); + } + $dest->{t} = $t; + $dest->{tz} = $tz; + $dest->{a} = $_a; + # Date::Parse isn't in the standard Perl distro :( + if ($tz =~ s/^\+//) { + $t += tz_to_s_offset($tz); + } elsif ($tz =~ s/^\-//) { + $t -= tz_to_s_offset($tz); + } + $dest->{t_utc} = $t; +} + +sub process_commit { + my ($c, $r_min, $r_max, $defer) = @_; + if (defined $r_min && defined $r_max) { + if ($r_min == $c->{r} && $r_min == $r_max) { + show_commit($c); + return 0; + } + return 1 if $r_min == $r_max; + if ($r_min < $r_max) { + # we need to reverse the print order + return 0 if (defined $_limit && --$_limit < 0); + push @$defer, $c; + return 1; + } + if ($r_min != $r_max) { + return 1 if ($r_min < $c->{r}); + return 1 if ($r_max > $c->{r}); + } + } + return 0 if (defined $_limit && --$_limit < 0); + show_commit($c); + return 1; +} + +sub show_commit { + my $c = shift; + if ($_oneline) { + my $x = "\n"; + if (my $l = $c->{l}) { + while ($l->[0] =~ /^\s*$/) { shift @$l } + $x = $l->[0]; + } + $_l_fmt ||= 'A' . length($c->{r}); + print 'r',pack($_l_fmt, $c->{r}),' | '; + print "$c->{c} | " if $_show_commit; + print $x; + } else { + show_commit_normal($c); + } +} + +sub show_commit_normal { + my ($c) = @_; + print '-' x72, "\nr$c->{r} | "; + print "$c->{c} | " if $_show_commit; + print "$c->{a} | ", strftime("%Y-%m-%d %H:%M:%S %z (%a, %d %b %Y)", + localtime($c->{t_utc})), ' | '; + my $nr_line = 0; + + if (my $l = $c->{l}) { + while ($l->[$#$l] eq "\n" && $l->[($#$l - 1)] eq "\n") { + pop @$l; + } + $nr_line = scalar @$l; + if (!$nr_line) { + print "1 line\n\n\n"; + } else { + if ($nr_line == 1) { + $nr_line = '1 line'; + } else { + $nr_line .= ' lines'; + } + print $nr_line, "\n\n"; + print $_ foreach @$l; + } + } else { + print "1 line\n\n"; + + } + foreach my $x (qw/raw diff/) { + if ($c->{$x}) { + print "\n"; + print $_ foreach @{$c->{$x}} + } + } +} + +sub libsvn_load { + return unless $_use_lib; + $_use_lib = eval { + require SVN::Core; + if ($SVN::Core::VERSION lt '1.1.0') { + die "Need SVN::Core 1.1.0 or better ", + "(got $SVN::Core::VERSION) ", + "Falling back to command-line svn\n"; + } + require SVN::Ra; + require SVN::Delta; + push @SVN::Git::Editor::ISA, 'SVN::Delta::Editor'; + my $kill_stupid_warnings = $SVN::Node::none.$SVN::Node::file. + $SVN::Node::dir.$SVN::Node::unknown. + $SVN::Node::none.$SVN::Node::file. + $SVN::Node::dir.$SVN::Node::unknown; + 1; + }; +} + +sub libsvn_connect { + my ($url) = @_; + my $auth = SVN::Core::auth_open([SVN::Client::get_simple_provider(), + SVN::Client::get_ssl_server_trust_file_provider(), + SVN::Client::get_username_provider()]); + my $s = eval { SVN::Ra->new(url => $url, auth => $auth) }; + return $s; +} + +sub libsvn_get_file { + my ($gui, $f, $rev) = @_; + my $p = $f; + return unless ($p =~ s#^\Q$SVN_PATH\E/##); + + my ($hash, $pid, $in, $out); + my $pool = SVN::Pool->new; + defined($pid = open3($in, $out, '>&STDERR', + qw/git-hash-object -w --stdin/)) or croak $!; + # redirect STDOUT for SVN 1.1.x compatibility + open my $stdout, '>&', \*STDOUT or croak $!; + open STDOUT, '>&', $in or croak $!; + my ($r, $props) = $SVN->get_file($f, $rev, \*STDOUT, $pool); + $in->flush == 0 or croak $!; + open STDOUT, '>&', $stdout or croak $!; + close $in or croak $!; + close $stdout or croak $!; + $pool->clear; + chomp($hash = do { local $/; <$out> }); + close $out or croak $!; + waitpid $pid, 0; + $hash =~ /^$sha1$/o or die "not a sha1: $hash\n"; + + my $mode = exists $props->{'svn:executable'} ? '100755' : '100644'; + if (exists $props->{'svn:special'}) { + $mode = '120000'; + my $link = `git-cat-file blob $hash`; + $link =~ s/^link // or die "svn:special file with contents: <", + $link, "> is not understood\n"; + defined($pid = open3($in, $out, '>&STDERR', + qw/git-hash-object -w --stdin/)) or croak $!; + print $in $link; + $in->flush == 0 or croak $!; + close $in or croak $!; + chomp($hash = do { local $/; <$out> }); + close $out or croak $!; + waitpid $pid, 0; + $hash =~ /^$sha1$/o or die "not a sha1: $hash\n"; + } + print $gui $mode,' ',$hash,"\t",$p,"\0" or croak $!; +} + +sub libsvn_log_entry { + my ($rev, $author, $date, $msg, $parents) = @_; + my ($Y,$m,$d,$H,$M,$S) = ($date =~ /^(\d{4})\-(\d\d)\-(\d\d)T + (\d\d)\:(\d\d)\:(\d\d).\d+Z$/x) + or die "Unable to parse date: $date\n"; + if (defined $_authors && ! defined $users{$author}) { + die "Author: $author not defined in $_authors file\n"; + } + return { revision => $rev, date => "+0000 $Y-$m-$d $H:$M:$S", + author => $author, msg => $msg."\n", parents => $parents || [] } +} + +sub process_rm { + my ($gui, $last_commit, $f) = @_; + $f =~ s#^\Q$SVN_PATH\E/?## or return; + # remove entire directories. + if (safe_qx('git-ls-tree',$last_commit,'--',$f) =~ /^040000 tree/) { + defined(my $pid = open my $ls, '-|') or croak $!; + if (!$pid) { + exec(qw/git-ls-tree -r --name-only -z/, + $last_commit,'--',$f) or croak $!; + } + local $/ = "\0"; + while (<$ls>) { + print $gui '0 ',0 x 40,"\t",$_ or croak $!; + } + close $ls or croak $?; + } else { + print $gui '0 ',0 x 40,"\t",$f,"\0" or croak $!; + } +} + +sub libsvn_fetch { + my ($last_commit, $paths, $rev, $author, $date, $msg) = @_; + open my $gui, '| git-update-index -z --index-info' or croak $!; + my @amr; + foreach my $f (keys %$paths) { + my $m = $paths->{$f}->action(); + $f =~ s#^/+##; + if ($m =~ /^[DR]$/) { + print "\t$m\t$f\n" unless $_q; + process_rm($gui, $last_commit, $f); + next if $m eq 'D'; + # 'R' can be file replacements, too, right? + } + my $pool = SVN::Pool->new; + my $t = $SVN->check_path($f, $rev, $pool); + if ($t == $SVN::Node::file) { + if ($m =~ /^[AMR]$/) { + push @amr, [ $m, $f ]; + } else { + die "Unrecognized action: $m, ($f r$rev)\n"; + } + } + $pool->clear; + } + foreach (@amr) { + print "\t$_->[0]\t$_->[1]\n" unless $_q; + libsvn_get_file($gui, $_->[1], $rev) + } + close $gui or croak $?; + return libsvn_log_entry($rev, $author, $date, $msg, [$last_commit]); +} + +sub svn_grab_base_rev { + defined(my $pid = open my $fh, '-|') or croak $!; + if (!$pid) { + open my $null, '>', '/dev/null' or croak $!; + open STDERR, '>&', $null or croak $!; + exec qw/git-rev-parse --verify/,"refs/remotes/$GIT_SVN^0" + or croak $!; + } + chomp(my $c = do { local $/; <$fh> }); + close $fh; + if (defined $c && length $c) { + my ($url, $rev, $uuid) = cmt_metadata($c); + return ($rev, $c) if defined $rev; + } + if ($_no_metadata) { + my $offset = -41; # from tail + my $rl; + open my $fh, '<', $REVDB or + die "--no-metadata specified and $REVDB not readable\n"; + seek $fh, $offset, 2; + $rl = readline $fh; + defined $rl or return (undef, undef); + chomp $rl; + while ($c ne $rl && tell $fh != 0) { + $offset -= 41; + seek $fh, $offset, 2; + $rl = readline $fh; + defined $rl or return (undef, undef); + chomp $rl; + } + my $rev = tell $fh; + croak $! if ($rev < -1); + $rev = ($rev - 41) / 41; + close $fh or croak $!; + return ($rev, $c); + } + return (undef, undef); +} + +sub libsvn_parse_revision { + my $base = shift; + my $head = $SVN->get_latest_revnum(); + if (!defined $_revision || $_revision eq 'BASE:HEAD') { + return ($base + 1, $head) if (defined $base); + return (0, $head); + } + return ($1, $2) if ($_revision =~ /^(\d+):(\d+)$/); + return ($_revision, $_revision) if ($_revision =~ /^\d+$/); + if ($_revision =~ /^BASE:(\d+)$/) { + return ($base + 1, $1) if (defined $base); + return (0, $head); + } + return ($1, $head) if ($_revision =~ /^(\d+):HEAD$/); + die "revision argument: $_revision not understood by git-svn\n", + "Try using the command-line svn client instead\n"; +} + +sub libsvn_traverse { + my ($gui, $pfx, $path, $rev) = @_; + my $cwd = "$pfx/$path"; + my $pool = SVN::Pool->new; + $cwd =~ s#^/+##g; + my ($dirent, $r, $props) = $SVN->get_dir($cwd, $rev, $pool); + foreach my $d (keys %$dirent) { + my $t = $dirent->{$d}->kind; + if ($t == $SVN::Node::dir) { + libsvn_traverse($gui, $cwd, $d, $rev); + } elsif ($t == $SVN::Node::file) { + print "\tA\t$cwd/$d\n" unless $_q; + libsvn_get_file($gui, "$cwd/$d", $rev); + } + } + $pool->clear; +} + +sub libsvn_traverse_ignore { + my ($fh, $path, $r) = @_; + $path =~ s#^/+##g; + my $pool = SVN::Pool->new; + my ($dirent, undef, $props) = $SVN->get_dir($path, $r, $pool); + my $p = $path; + $p =~ s#^\Q$SVN_PATH\E/?##; + print $fh length $p ? "\n# $p\n" : "\n# /\n"; + if (my $s = $props->{'svn:ignore'}) { + $s =~ s/[\r\n]+/\n/g; + chomp $s; + if (length $p == 0) { + $s =~ s#\n#\n/$p#g; + print $fh "/$s\n"; + } else { + $s =~ s#\n#\n/$p/#g; + print $fh "/$p/$s\n"; + } + } + foreach (sort keys %$dirent) { + next if $dirent->{$_}->kind != $SVN::Node::dir; + libsvn_traverse_ignore($fh, "$path/$_", $r); + } + $pool->clear; +} + +sub revisions_eq { + my ($path, $r0, $r1) = @_; + return 1 if $r0 == $r1; + my $nr = 0; + if ($_use_lib) { + # should be OK to use Pool here (r1 - r0) should be small + my $pool = SVN::Pool->new; + libsvn_get_log($SVN, "/$path", $r0, $r1, + 0, 1, 1, sub {$nr++}, $pool); + $pool->clear; + } else { + my ($url, undef) = repo_path_split($SVN_URL); + my $svn_log = svn_log_raw("$url/$path","-r$r0:$r1"); + while (next_log_entry($svn_log)) { $nr++ } + close $svn_log->{fh}; + } + return 0 if ($nr > 1); + return 1; +} + +sub libsvn_find_parent_branch { + my ($paths, $rev, $author, $date, $msg) = @_; + my $svn_path = '/'.$SVN_PATH; + + # look for a parent from another branch: + my $i = $paths->{$svn_path} or return; + my $branch_from = $i->copyfrom_path or return; + my $r = $i->copyfrom_rev; + print STDERR "Found possible branch point: ", + "$branch_from => $svn_path, $r\n"; + $branch_from =~ s#^/##; + my $l_map = {}; + read_url_paths_all($l_map, '', "$GIT_DIR/svn"); + my $url = $SVN->{url}; + defined $l_map->{$url} or return; + my $id = $l_map->{$url}->{$branch_from}; + if (!defined $id && $_follow_parent) { + print STDERR "Following parent: $branch_from\@$r\n"; + # auto create a new branch and follow it + $id = basename($branch_from); + $id .= '@'.$r if -r "$GIT_DIR/svn/$id"; + while (-r "$GIT_DIR/svn/$id") { + # just grow a tail if we're not unique enough :x + $id .= '-'; + } + } + return unless defined $id; + + my ($r0, $parent) = find_rev_before($r,$id,1); + if ($_follow_parent && (!defined $r0 || !defined $parent)) { + defined(my $pid = fork) or croak $!; + if (!$pid) { + $GIT_SVN = $ENV{GIT_SVN_ID} = $id; + init_vars(); + $SVN_URL = "$url/$branch_from"; + $SVN_LOG = $SVN = undef; + setup_git_svn(); + # we can't assume SVN_URL exists at r+1: + $_revision = "0:$r"; + fetch_lib(); + exit 0; + } + waitpid $pid, 0; + croak $? if $?; + ($r0, $parent) = find_rev_before($r,$id,1); + } + return unless (defined $r0 && defined $parent); + if (revisions_eq($branch_from, $r0, $r)) { + unlink $GIT_SVN_INDEX; + print STDERR "Found branch parent: ($GIT_SVN) $parent\n"; + sys(qw/git-read-tree/, $parent); + return libsvn_fetch($parent, $paths, $rev, + $author, $date, $msg); + } + print STDERR "Nope, branch point not imported or unknown\n"; + return undef; +} + +sub libsvn_get_log { + my ($ra, @args) = @_; + if ($SVN::Core::VERSION le '1.2.0') { + splice(@args, 3, 1); + } + $ra->get_log(@args); +} + +sub libsvn_new_tree { + if (my $log_entry = libsvn_find_parent_branch(@_)) { + return $log_entry; + } + my ($paths, $rev, $author, $date, $msg) = @_; + open my $gui, '| git-update-index -z --index-info' or croak $!; + my $pool = SVN::Pool->new; + libsvn_traverse($gui, '', $SVN_PATH, $rev, $pool); + $pool->clear; + close $gui or croak $?; + return libsvn_log_entry($rev, $author, $date, $msg); +} + +sub find_graft_path_commit { + my ($tree_paths, $p1, $r1) = @_; + foreach my $x (keys %$tree_paths) { + next unless ($p1 =~ /^\Q$x\E/); + my $i = $tree_paths->{$x}; + my ($r0, $parent) = find_rev_before($r1,$i,1); + return $parent if (defined $r0 && $r0 == $r1); + print STDERR "r$r1 of $i not imported\n"; + next; + } + return undef; +} + +sub find_graft_path_parents { + my ($grafts, $tree_paths, $c, $p0, $r0) = @_; + foreach my $x (keys %$tree_paths) { + next unless ($p0 =~ /^\Q$x\E/); + my $i = $tree_paths->{$x}; + my ($r, $parent) = find_rev_before($r0, $i, 1); + if (defined $r && defined $parent && revisions_eq($x,$r,$r0)) { + my ($url_b, undef, $uuid_b) = cmt_metadata($c); + my ($url_a, undef, $uuid_a) = cmt_metadata($parent); + next if ($url_a && $url_b && $url_a eq $url_b && + $uuid_b eq $uuid_a); + $grafts->{$c}->{$parent} = 1; + } + } +} + +sub libsvn_graft_file_copies { + my ($grafts, $tree_paths, $path, $paths, $rev) = @_; + foreach (keys %$paths) { + my $i = $paths->{$_}; + my ($m, $p0, $r0) = ($i->action, $i->copyfrom_path, + $i->copyfrom_rev); + next unless (defined $p0 && defined $r0); + + my $p1 = $_; + $p1 =~ s#^/##; + $p0 =~ s#^/##; + my $c = find_graft_path_commit($tree_paths, $p1, $rev); + next unless $c; + find_graft_path_parents($grafts, $tree_paths, $c, $p0, $r0); + } +} + +sub set_index { + my $old = $ENV{GIT_INDEX_FILE}; + $ENV{GIT_INDEX_FILE} = shift; + return $old; +} + +sub restore_index { + my ($old) = @_; + if (defined $old) { + $ENV{GIT_INDEX_FILE} = $old; + } else { + delete $ENV{GIT_INDEX_FILE}; + } +} + +sub libsvn_commit_cb { + my ($rev, $date, $committer, $c, $msg, $r_last, $cmt_last) = @_; + if ($_optimize_commits && $rev == ($r_last + 1)) { + my $log = libsvn_log_entry($rev,$committer,$date,$msg); + $log->{tree} = get_tree_from_treeish($c); + my $cmt = git_commit($log, $cmt_last, $c); + my @diff = safe_qx('git-diff-tree', $cmt, $c); + if (@diff) { + print STDERR "Trees differ: $cmt $c\n", + join('',@diff),"\n"; + exit 1; + } + } else { + fetch("$rev=$c"); + } +} + +sub libsvn_ls_fullurl { + my $fullurl = shift; + my ($repo, $path) = repo_path_split($fullurl); + $SVN ||= libsvn_connect($repo); + my @ret; + my $pool = SVN::Pool->new; + my ($dirent, undef, undef) = $SVN->get_dir($path, + $SVN->get_latest_revnum, $pool); + foreach my $d (keys %$dirent) { + if ($dirent->{$d}->kind == $SVN::Node::dir) { + push @ret, "$d/"; # add '/' for compat with cli svn + } + } + $pool->clear; + return @ret; +} + + +sub libsvn_skip_unknown_revs { + my $err = shift; + my $errno = $err->apr_err(); + # Maybe the branch we're tracking didn't + # exist when the repo started, so it's + # not an error if it doesn't, just continue + # + # Wonderfully consistent library, eh? + # 160013 - svn:// and file:// + # 175002 - http(s):// + # More codes may be discovered later... + if ($errno == 175002 || $errno == 160013) { + return; + } + croak "Error from SVN, ($errno): ", $err->expanded_message,"\n"; +}; + +# Tie::File seems to be prone to offset errors if revisions get sparse, +# it's not that fast, either. Tie::File is also not in Perl 5.6. So +# one of my favorite modules is out :< Next up would be one of the DBM +# modules, but I'm not sure which is most portable... So I'll just +# go with something that's plain-text, but still capable of +# being randomly accessed. So here's my ultra-simple fixed-width +# database. All records are 40 characters + "\n", so it's easy to seek +# to a revision: (41 * rev) is the byte offset. +# A record of 40 0s denotes an empty revision. +# And yes, it's still pretty fast (faster than Tie::File). +sub revdb_set { + my ($file, $rev, $commit) = @_; + length $commit == 40 or croak "arg3 must be a full SHA1 hexsum\n"; + open my $fh, '+<', $file or croak $!; + my $offset = $rev * 41; + # assume that append is the common case: + seek $fh, 0, 2 or croak $!; + my $pos = tell $fh; + if ($pos < $offset) { + print $fh (('0' x 40),"\n") x (($offset - $pos) / 41); + } + seek $fh, $offset, 0 or croak $!; + print $fh $commit,"\n"; + close $fh or croak $!; +} + +sub revdb_get { + my ($file, $rev) = @_; + my $ret; + my $offset = $rev * 41; + open my $fh, '<', $file or croak $!; + seek $fh, $offset, 0; + if (tell $fh == $offset) { + $ret = readline $fh; + if (defined $ret) { + chomp $ret; + $ret = undef if ($ret =~ /^0{40}$/); + } + } + close $fh or croak $!; + return $ret; +} + +sub copy_remote_ref { + my $origin = $_cp_remote ? $_cp_remote : 'origin'; + my $ref = "refs/remotes/$GIT_SVN"; + if (safe_qx('git-ls-remote', $origin, $ref)) { + sys(qw/git fetch/, $origin, "$ref:$ref"); + } else { + die "Unable to find remote reference: ", + "refs/remotes/$GIT_SVN on $origin\n"; + } +} + +package SVN::Git::Editor; +use vars qw/@ISA/; +use strict; +use warnings; +use Carp qw/croak/; +use IO::File; + +sub new { + my $class = shift; + my $git_svn = shift; + my $self = SVN::Delta::Editor->new(@_); + bless $self, $class; + foreach (qw/svn_path c r ra /) { + die "$_ required!\n" unless (defined $git_svn->{$_}); + $self->{$_} = $git_svn->{$_}; + } + $self->{pool} = SVN::Pool->new; + $self->{bat} = { '' => $self->open_root($self->{r}, $self->{pool}) }; + $self->{rm} = { }; + require Digest::MD5; + return $self; +} + +sub split_path { + return ($_[0] =~ m#^(.*?)/?([^/]+)$#); +} + +sub repo_path { + (defined $_[1] && length $_[1]) ? "$_[0]->{svn_path}/$_[1]" + : $_[0]->{svn_path} +} + +sub url_path { + my ($self, $path) = @_; + $self->{ra}->{url} . '/' . $self->repo_path($path); +} + +sub rmdirs { + my ($self, $q) = @_; + my $rm = $self->{rm}; + delete $rm->{''}; # we never delete the url we're tracking + return unless %$rm; + + foreach (keys %$rm) { + my @d = split m#/#, $_; + my $c = shift @d; + $rm->{$c} = 1; + while (@d) { + $c .= '/' . shift @d; + $rm->{$c} = 1; + } + } + delete $rm->{$self->{svn_path}}; + delete $rm->{''}; # we never delete the url we're tracking + return unless %$rm; + + defined(my $pid = open my $fh,'-|') or croak $!; + if (!$pid) { + exec qw/git-ls-tree --name-only -r -z/, $self->{c} or croak $!; + } + local $/ = "\0"; + my @svn_path = split m#/#, $self->{svn_path}; + while (<$fh>) { + chomp; + my @dn = (@svn_path, (split m#/#, $_)); + while (pop @dn) { + delete $rm->{join '/', @dn}; + } + unless (%$rm) { + close $fh; + return; + } + } + close $fh; + + my ($r, $p, $bat) = ($self->{r}, $self->{pool}, $self->{bat}); + foreach my $d (sort { $b =~ tr#/#/# <=> $a =~ tr#/#/# } keys %$rm) { + $self->close_directory($bat->{$d}, $p); + my ($dn) = ($d =~ m#^(.*?)/?(?:[^/]+)$#); + print "\tD+\t/$d/\n" unless $q; + $self->SUPER::delete_entry($d, $r, $bat->{$dn}, $p); + delete $bat->{$d}; + } +} + +sub open_or_add_dir { + my ($self, $full_path, $baton) = @_; + my $p = SVN::Pool->new; + my $t = $self->{ra}->check_path($full_path, $self->{r}, $p); + $p->clear; + if ($t == $SVN::Node::none) { + return $self->add_directory($full_path, $baton, + undef, -1, $self->{pool}); + } elsif ($t == $SVN::Node::dir) { + return $self->open_directory($full_path, $baton, + $self->{r}, $self->{pool}); + } + print STDERR "$full_path already exists in repository at ", + "r$self->{r} and it is not a directory (", + ($t == $SVN::Node::file ? 'file' : 'unknown'),"/$t)\n"; + exit 1; +} + +sub ensure_path { + my ($self, $path) = @_; + my $bat = $self->{bat}; + $path = $self->repo_path($path); + return $bat->{''} unless (length $path); + my @p = split m#/+#, $path; + my $c = shift @p; + $bat->{$c} ||= $self->open_or_add_dir($c, $bat->{''}); + while (@p) { + my $c0 = $c; + $c .= '/' . shift @p; + $bat->{$c} ||= $self->open_or_add_dir($c, $bat->{$c0}); + } + return $bat->{$c}; +} + +sub A { + my ($self, $m, $q) = @_; + my ($dir, $file) = split_path($m->{file_b}); + my $pbat = $self->ensure_path($dir); + my $fbat = $self->add_file($self->repo_path($m->{file_b}), $pbat, + undef, -1); + print "\tA\t$m->{file_b}\n" unless $q; + $self->chg_file($fbat, $m); + $self->close_file($fbat,undef,$self->{pool}); +} + +sub C { + my ($self, $m, $q) = @_; + my ($dir, $file) = split_path($m->{file_b}); + my $pbat = $self->ensure_path($dir); + my $fbat = $self->add_file($self->repo_path($m->{file_b}), $pbat, + $self->url_path($m->{file_a}), $self->{r}); + print "\tC\t$m->{file_a} => $m->{file_b}\n" unless $q; + $self->chg_file($fbat, $m); + $self->close_file($fbat,undef,$self->{pool}); +} + +sub delete_entry { + my ($self, $path, $pbat) = @_; + my $rpath = $self->repo_path($path); + my ($dir, $file) = split_path($rpath); + $self->{rm}->{$dir} = 1; + $self->SUPER::delete_entry($rpath, $self->{r}, $pbat, $self->{pool}); +} + +sub R { + my ($self, $m, $q) = @_; + my ($dir, $file) = split_path($m->{file_b}); + my $pbat = $self->ensure_path($dir); + my $fbat = $self->add_file($self->repo_path($m->{file_b}), $pbat, + $self->url_path($m->{file_a}), $self->{r}); + print "\tR\t$m->{file_a} => $m->{file_b}\n" unless $q; + $self->chg_file($fbat, $m); + $self->close_file($fbat,undef,$self->{pool}); + + ($dir, $file) = split_path($m->{file_a}); + $pbat = $self->ensure_path($dir); + $self->delete_entry($m->{file_a}, $pbat); +} + +sub M { + my ($self, $m, $q) = @_; + my ($dir, $file) = split_path($m->{file_b}); + my $pbat = $self->ensure_path($dir); + my $fbat = $self->open_file($self->repo_path($m->{file_b}), + $pbat,$self->{r},$self->{pool}); + print "\t$m->{chg}\t$m->{file_b}\n" unless $q; + $self->chg_file($fbat, $m); + $self->close_file($fbat,undef,$self->{pool}); +} + +sub T { shift->M(@_) } + +sub change_file_prop { + my ($self, $fbat, $pname, $pval) = @_; + $self->SUPER::change_file_prop($fbat, $pname, $pval, $self->{pool}); +} + +sub chg_file { + my ($self, $fbat, $m) = @_; + if ($m->{mode_b} =~ /755$/ && $m->{mode_a} !~ /755$/) { + $self->change_file_prop($fbat,'svn:executable','*'); + } elsif ($m->{mode_b} !~ /755$/ && $m->{mode_a} =~ /755$/) { + $self->change_file_prop($fbat,'svn:executable',undef); + } + my $fh = IO::File->new_tmpfile or croak $!; + if ($m->{mode_b} =~ /^120/) { + print $fh 'link ' or croak $!; + $self->change_file_prop($fbat,'svn:special','*'); + } elsif ($m->{mode_a} =~ /^120/ && $m->{mode_b} !~ /^120/) { + $self->change_file_prop($fbat,'svn:special',undef); + } + defined(my $pid = fork) or croak $!; + if (!$pid) { + open STDOUT, '>&', $fh or croak $!; + exec qw/git-cat-file blob/, $m->{sha1_b} or croak $!; + } + waitpid $pid, 0; + croak $? if $?; + $fh->flush == 0 or croak $!; + seek $fh, 0, 0 or croak $!; + + my $md5 = Digest::MD5->new; + $md5->addfile($fh) or croak $!; + seek $fh, 0, 0 or croak $!; + + my $exp = $md5->hexdigest; + my $atd = $self->apply_textdelta($fbat, undef, $self->{pool}); + my $got = SVN::TxDelta::send_stream($fh, @$atd, $self->{pool}); + die "Checksum mismatch\nexpected: $exp\ngot: $got\n" if ($got ne $exp); + + close $fh or croak $!; +} + +sub D { + my ($self, $m, $q) = @_; + my ($dir, $file) = split_path($m->{file_b}); + my $pbat = $self->ensure_path($dir); + print "\tD\t$m->{file_b}\n" unless $q; + $self->delete_entry($m->{file_b}, $pbat); +} + +sub close_edit { + my ($self) = @_; + my ($p,$bat) = ($self->{pool}, $self->{bat}); + foreach (sort { $b =~ tr#/#/# <=> $a =~ tr#/#/# } keys %$bat) { + $self->close_directory($bat->{$_}, $p); + } + $self->SUPER::close_edit($p); + $p->clear; +} + +sub abort_edit { + my ($self) = @_; + $self->SUPER::abort_edit($self->{pool}); + $self->{pool}->clear; +} + +__END__ + +Data structures: + +$svn_log hashref (as returned by svn_log_raw) +{ + fh => file handle of the log file, + state => state of the log file parser (sep/msg/rev/msg_start...) +} + +$log_msg hashref as returned by next_log_entry($svn_log) +{ + msg => 'whitespace-formatted log entry +', # trailing newline is preserved + revision => '8', # integer + date => '2004-02-24T17:01:44.108345Z', # commit date + author => 'committer name' +}; + + +@mods = array of diff-index line hashes, each element represents one line + of diff-index output + +diff-index line ($m hash) +{ + mode_a => first column of diff-index output, no leading ':', + mode_b => second column of diff-index output, + sha1_b => sha1sum of the final blob, + chg => change type [MCRADT], + file_a => original file name of a file (iff chg is 'C' or 'R') + file_b => new/current file name of a file (any chg) +} +; + +# retval of read_url_paths{,_all}(); +$l_map = { + # repository root url + 'https://svn.musicpd.org' => { + # repository path # GIT_SVN_ID + 'mpd/trunk' => 'trunk', + 'mpd/tags/0.11.5' => 'tags/0.11.5', + }, +} + +Notes: + I don't trust the each() function on unless I created %hash myself + because the internal iterator may not have started at base. |