git-svn: Add per-svn-remote ignore-paths config

The --ignore-paths option to fetch is very useful for working on a subset
of a SVN repository.  For proper operation, every command that causes a
fetch (explicit or implied) must include a matching --ignore-paths option.

This patch adds a persistent svn-remote.$repo_id.ignore-paths config by
promoting Fetcher::is_path_ignored to a member function and initializing
$self->{ignore_regex} in Fetcher::new.  Command line --ignore-paths is
still recognized and acts in addition to the config value.

Signed-off-by: Ben Jackson <ben@ben.com>
Acked-by: Eric Wong <normalperson@yhbt.net>

3 files changed, 82 insertions, 21 deletions

diff --git a/Documentation/git-svn.txt b/Documentation/git-svn.txt
index 85b2c8da5..aad5e65c7 100644
--- a/Documentation/git-svn.txt
+++ b/Documentation/git-svn.txt
@@ -107,17 +107,25 @@ repository, either don't use this option or you should both use it in
 the same local timezone.
 
 --ignore-paths=<regex>;;
-	This allows one to specify Perl regular expression that will
+	This allows one to specify a Perl regular expression that will
 	cause skipping of all matching paths from checkout from SVN.
-	Examples:
+	The '--ignore-paths' option should match for every 'fetch'
+	(including automatic fetches due to 'clone', 'dcommit',
+	'rebase', etc) on a given repository.
 
-	--ignore-paths="^doc" - skip "doc*" directory for every fetch.
+config key: svn-remote.<name>.ignore-paths
 
-	--ignore-paths="^[^/]+/(?:branches|tags)" - skip "branches"
-	    and "tags" of first level directories.
+	If the ignore-paths config key is set and the command
+	line option is also given, both regular expressions
+	will be used.
 
-	Regular expression is not persistent, you should specify
-	it every time when fetching.
+Examples:
+
+	--ignore-paths="^doc" - skip "doc*" directory for every
+	    fetch.
+
+	--ignore-paths="^[^/]+/(?:branches|tags)" - skip
+	    "branches" and "tags" of first level directories.
 
 'clone'::
 	Runs 'init' and 'fetch'.  It will automatically create a
diff --git a/git-svn.perl b/git-svn.perl
index 50a398b3e..279847921 100755
--- a/git-svn.perl
+++ b/git-svn.perl
@@ -3331,6 +3331,8 @@ sub new {
 		$self->{empty_symlinks} =
 		                  _mark_empty_symlinks($git_svn, $switch_path);
 	}
+	$self->{ignore_regex} = eval { command_oneline('config', '--get',
+			     "svn-remote.$git_svn->{repo_id}.ignore-paths") };
 	$self->{empty} = {};
 	$self->{dir_prop} = {};
 	$self->{file_prop} = {};
@@ -3395,8 +3397,10 @@ sub in_dot_git {
 
 # return value: 0 -- don't ignore, 1 -- ignore
 sub is_path_ignored {
-	my ($path) = @_;
+	my ($self, $path) = @_;
 	return 1 if in_dot_git($path);
+	return 1 if defined($self->{ignore_regex}) &&
+	            $path =~ m!$self->{ignore_regex}!;
 	return 0 unless defined($_ignore_regex);
 	return 1 if $path =~ m!$_ignore_regex!o;
 	return 0;
@@ -3427,7 +3431,7 @@ sub git_path {
 
 sub delete_entry {
 	my ($self, $path, $rev, $pb) = @_;
-	return undef if is_path_ignored($path);
+	return undef if $self->is_path_ignored($path);
 
 	my $gpath = $self->git_path($path);
 	return undef if ($gpath eq '');
@@ -3460,7 +3464,7 @@ sub open_file {
 	my ($self, $path, $pb, $rev) = @_;
 	my ($mode, $blob);
 
-	goto out if is_path_ignored($path);
+	goto out if $self->is_path_ignored($path);
 
 	my $gpath = $self->git_path($path);
 	($mode, $blob) = (command('ls-tree', '-z', $self->{c}, "./$gpath")
@@ -3480,7 +3484,7 @@ sub add_file {
 	my ($self, $path, $pb, $cp_path, $cp_rev) = @_;
 	my $mode;
 
-	if (!is_path_ignored($path)) {
+	if (!$self->is_path_ignored($path)) {
 		my ($dir, $file) = ($path =~ m#^(.*?)/?([^/]+)$#);
 		delete $self->{empty}->{$dir};
 		$mode = '100644';
@@ -3491,7 +3495,7 @@ sub add_file {
 
 sub add_directory {
 	my ($self, $path, $cp_path, $cp_rev) = @_;
-	goto out if is_path_ignored($path);
+	goto out if $self->is_path_ignored($path);
 	my $gpath = $self->git_path($path);
 	if ($gpath eq '') {
 		my ($ls, $ctx) = command_output_pipe(qw/ls-tree
@@ -3515,7 +3519,7 @@ out:
 
 sub change_dir_prop {
 	my ($self, $db, $prop, $value) = @_;
-	return undef if is_path_ignored($db->{path});
+	return undef if $self->is_path_ignored($db->{path});
 	$self->{dir_prop}->{$db->{path}} ||= {};
 	$self->{dir_prop}->{$db->{path}}->{$prop} = $value;
 	undef;
@@ -3523,7 +3527,7 @@ sub change_dir_prop {
 
 sub absent_directory {
 	my ($self, $path, $pb) = @_;
-	return undef if is_path_ignored($path);
+	return undef if $self->is_path_ignored($path);
 	$self->{absent_dir}->{$pb->{path}} ||= [];
 	push @{$self->{absent_dir}->{$pb->{path}}}, $path;
 	undef;
@@ -3531,7 +3535,7 @@ sub absent_directory {
 
 sub absent_file {
 	my ($self, $path, $pb) = @_;
-	return undef if is_path_ignored($path);
+	return undef if $self->is_path_ignored($path);
 	$self->{absent_file}->{$pb->{path}} ||= [];
 	push @{$self->{absent_file}->{$pb->{path}}}, $path;
 	undef;
@@ -3539,7 +3543,7 @@ sub absent_file {
 
 sub change_file_prop {
 	my ($self, $fb, $prop, $value) = @_;
-	return undef if is_path_ignored($fb->{path});
+	return undef if $self->is_path_ignored($fb->{path});
 	if ($prop eq 'svn:executable') {
 		if ($fb->{mode_b} != 120000) {
 			$fb->{mode_b} = defined $value ? 100755 : 100644;
@@ -3555,7 +3559,7 @@ sub change_file_prop {
 
 sub apply_textdelta {
 	my ($self, $fb, $exp) = @_;
-	return undef if is_path_ignored($fb->{path});
+	return undef if $self->is_path_ignored($fb->{path});
 	my $fh = $::_repository->temp_acquire('svn_delta');
 	# $fh gets auto-closed() by SVN::TxDelta::apply(),
 	# (but $base does not,) so dup() it for reading in close_file
@@ -3602,7 +3606,7 @@ sub apply_textdelta {
 
 sub close_file {
 	my ($self, $fb, $exp) = @_;
-	return undef if is_path_ignored($fb->{path});
+	return undef if $self->is_path_ignored($fb->{path});
 
 	my $hash;
 	my $path = $self->git_path($fb->{path});
diff --git a/t/t9134-git-svn-ignore-paths.sh b/t/t9134-git-svn-ignore-paths.sh
index c4b5b8bcf..b9a15978e 100755
--- a/t/t9134-git-svn-ignore-paths.sh
+++ b/t/t9134-git-svn-ignore-paths.sh
@@ -31,6 +31,22 @@ test_expect_success 'clone an SVN repository with ignored www directory' '
 	test_cmp expect expect2
 '
 
+test_expect_success 'init+fetch an SVN repository with ignored www directory' '
+	git svn init "$svnrepo" c &&
+	( cd c && git svn fetch --ignore-paths="^www" ) &&
+	rm expect2 &&
+	echo test_qqq > expect &&
+	for i in c/*/*.txt; do cat $i >> expect2; done &&
+	test_cmp expect expect2
+'
+
+test_expect_success 'set persistent ignore-paths config' '
+	(
+	    cd g &&
+	    git config svn-remote.svn.ignore-paths "^www"
+	)
+'
+
 test_expect_success 'SVN-side change outside of www' '
 	(
 		cd s &&
@@ -41,9 +57,20 @@ test_expect_success 'SVN-side change outside of www' '
 	)
 '
 
-test_expect_success 'update git svn-cloned repo' '
+test_expect_success 'update git svn-cloned repo (config ignore)' '
 	(
 		cd g &&
+		git svn rebase &&
+		printf "test_qqq\nb\n" > expect &&
+		for i in */*.txt; do cat $i >> expect2; done &&
+		test_cmp expect2 expect &&
+		rm expect expect2
+	)
+'
+
+test_expect_success 'update git svn-cloned repo (option ignore)' '
+	(
+		cd c &&
 		git svn rebase --ignore-paths="^www" &&
 		printf "test_qqq\nb\n" > expect &&
 		for i in */*.txt; do cat $i >> expect2; done &&
@@ -62,9 +89,20 @@ test_expect_success 'SVN-side change inside of ignored www' '
 	)
 '
 
-test_expect_success 'update git svn-cloned repo' '
+test_expect_success 'update git svn-cloned repo (config ignore)' '
 	(
 		cd g &&
+		git svn rebase &&
+		printf "test_qqq\nb\n" > expect &&
+		for i in */*.txt; do cat $i >> expect2; done &&
+		test_cmp expect2 expect &&
+		rm expect expect2
+	)
+'
+
+test_expect_success 'update git svn-cloned repo (option ignore)' '
+	(
+		cd c &&
 		git svn rebase --ignore-paths="^www" &&
 		printf "test_qqq\nb\n" > expect &&
 		for i in */*.txt; do cat $i >> expect2; done &&
@@ -84,9 +122,20 @@ test_expect_success 'SVN-side change in and out of ignored www' '
 	)
 '
 
-test_expect_success 'update git svn-cloned repo again' '
+test_expect_success 'update git svn-cloned repo again (config ignore)' '
 	(
 		cd g &&
+		git svn rebase &&
+		printf "test_qqq\nb\nygg\n" > expect &&
+		for i in */*.txt; do cat $i >> expect2; done &&
+		test_cmp expect2 expect &&
+		rm expect expect2
+	)
+'
+
+test_expect_success 'update git svn-cloned repo again (option ignore)' '
+	(
+		cd c &&
 		git svn rebase --ignore-paths="^www" &&
 		printf "test_qqq\nb\nygg\n" > expect &&
 		for i in */*.txt; do cat $i >> expect2; done &&