contrib/git-svn: add show-ignore command

Recursively finds and lists the svn:ignore property on
directories.  The output is suitable for appending to the
$GIT_DIR/info/exclude file.

Signed-off-by: Eric Wong <normalperson@yhbt.net>
Signed-off-by: Junio C Hamano <junkio@cox.net>

contrib/git-svn/git-svn.perl

@@ -49,6 +49,7 @@ my %cmd = (
 	fetch => [ \&fetch, "Download new revisions from SVN" ],
 	init => [ \&init, "Initialize and fetch (import)"],
 	commit => [ \&commit, "Commit git revisions to SVN" ],
+	'show-ignore' => [ \&show_ignore, "Show svn:ignore listings" ],
 	rebuild => [ \&rebuild, "Rebuild git-svn metadata (after git clone)" ],
 	help => [ \&usage, "Show help" ],
 );
@@ -258,6 +259,30 @@ sub commit {
 
 }
 
+sub show_ignore {
+	require File::Find or die $!;
+	my $exclude_file = "$GIT_DIR/info/exclude";
+	open my $fh, '<', $exclude_file or croak $!;
+	chomp(my @excludes = (<$fh>));
+	close $fh or croak $!;
+
+	$SVN_URL ||= file_to_s("$GIT_DIR/$GIT_SVN/info/url");
+	chdir $SVN_WC or croak $!;
+	my %ign;
+	File::Find::find({wanted=>sub{if(lstat $_ && -d _ && -d "$_/.svn"){
+		s#^\./##;
+		@{$ign{$_}} = safe_qx(qw(svn propget 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/ }
+	}
+}
+
 ########################### utility functions #########################
 
 sub setup_git_svn {

contrib/git-svn/git-svn.txt

@@ -61,6 +61,11 @@ rebuild::
 	the directory/repository you're tracking has moved or changed
 	protocols.
 
+show-ignore::
+	Recursively finds and lists the svn:ignore property on
+	directories.  The output is suitable for appending to
+	the $GIT_DIR/info/exclude file.
+
 OPTIONS
 -------
 -r <ARG>::
@@ -152,6 +157,8 @@ Tracking and contributing to an Subversion managed-project:
 	git commit git-svn-HEAD..my-branch
 # Something is committed to SVN, pull the latest into your branch::
 	git-svn fetch && git pull . git-svn-HEAD
+# Append svn:ignore settings to the default git exclude file:
+	git-svn show-ignore >> .git/info/exclude
 
 DESIGN PHILOSOPHY
 -----------------