git-svn: support for git-svn propset

This change allows git-svn to support setting subversion properties.

It is useful for manually setting properties when committing to a
subversion repo that *requires* properties to be set without requiring
moving your changeset to separate subversion checkout in order to
set props.

This change is initially from David Fraser, appearing at:

  http://mid.gmane.org/1927112650.1281253084529659.JavaMail.root@klofta.sjsoft.com>

They are now forward-ported to most recent git along with fixes to
deal with files in subdirectories.

Style and functional changes from Eric Wong have been taken
in their entirety from:

  http://mid.gmane.org/20141201094911.GA13931@dcvr.yhbt.net

There is a nit to point out: the code does not support
adding props unless there are also content changes to the files as
well.  This is demonstrated in the testcase.

[ew - simplify Git.pm usage for check-attr
    - improve shell portability for tests
    - minor phrasing changes in commit message]

Signed-off-by: David Fraser <davidf@sjsoft.com>
Signed-off-by: Alfred Perlstein <alfred@freebsd.org>
Signed-off-by: Eric Wong <normalperson@yhbt.net>

3 files changed, 181 insertions, 1 deletions

diff --git a/git-svn.perl b/git-svn.perl
index b6e2186cef..60f8814cc5 100755
--- a/git-svn.perl
+++ b/git-svn.perl
@@ -115,7 +115,7 @@ my ($_stdin, $_help, $_edit,
 	$_before, $_after,
 	$_merge, $_strategy, $_preserve_merges, $_dry_run, $_parents, $_local,
 	$_prefix, $_no_checkout, $_url, $_verbose,
-	$_commit_url, $_tag, $_merge_info, $_interactive);
+	$_commit_url, $_tag, $_merge_info, $_interactive, $_set_svn_props);
 
 # This is a refactoring artifact so Git::SVN can get at this git-svn switch.
 sub opt_prefix { return $_prefix || '' }
@@ -193,6 +193,7 @@ my %cmd = (
 			  'dry-run|n' => \$_dry_run,
 			  'fetch-all|all' => \$_fetch_all,
 			  'commit-url=s' => \$_commit_url,
+			  'set-svn-props=s' => \$_set_svn_props,
 			  'revision|r=i' => \$_revision,
 			  'no-rebase' => \$_no_rebase,
 			  'mergeinfo=s' => \$_merge_info,
@@ -228,6 +229,9 @@ my %cmd = (
         'propget' => [ \&cmd_propget,
 		       'Print the value of a property on a file or directory',
 		       { 'revision|r=i' => \$_revision } ],
+        'propset' => [ \&cmd_propset,
+		       'Set the value of a property on a file or directory - will be set on commit',
+		       {} ],
         'proplist' => [ \&cmd_proplist,
 		       'List all properties of a file or directory',
 		       { 'revision|r=i' => \$_revision } ],
@@ -1376,6 +1380,49 @@ sub cmd_propget {
 	print $props->{$prop} . "\n";
 }
 
+# cmd_propset (PROPNAME, PROPVAL, PATH)
+# ------------------------
+# Adjust the SVN property PROPNAME to PROPVAL for PATH.
+sub cmd_propset {
+	my ($propname, $propval, $path) = @_;
+	$path = '.' if not defined $path;
+	$path = $cmd_dir_prefix . $path;
+	usage(1) if not defined $propname;
+	usage(1) if not defined $propval;
+	my $file = basename($path);
+	my $dn = dirname($path);
+	my $cur_props = Git::SVN::Editor::check_attr( "svn-properties", $path );
+	my @new_props;
+	if (!$cur_props || $cur_props eq "unset" || $cur_props eq "" || $cur_props eq "set") {
+		push @new_props, "$propname=$propval";
+	} else {
+		# TODO: handle combining properties better
+		my @props = split(/;/, $cur_props);
+		my $replaced_prop;
+		foreach my $prop (@props) {
+			# Parse 'name=value' syntax and set the property.
+			if ($prop =~ /([^=]+)=(.*)/) {
+				my ($n,$v) = ($1,$2);
+				if ($n eq $propname) {
+					$v = $propval;
+					$replaced_prop = 1;
+				}
+				push @new_props, "$n=$v";
+			}
+		}
+		if (!$replaced_prop) {
+			push @new_props, "$propname=$propval";
+		}
+	}
+	my $attrfile = "$dn/.gitattributes";
+	open my $attrfh, '>>', $attrfile or die "Can't open $attrfile: $!\n";
+	# TODO: don't simply append here if $file already has svn-properties
+	my $new_props = join(';', @new_props);
+	print $attrfh "$file svn-properties=$new_props\n" or
+		die "write to $attrfile: $!\n";
+	close $attrfh or die "close $attrfile: $!\n";
+}
+
 # cmd_proplist (PATH)
 # -------------------
 # Print the list of SVN properties for PATH.
diff --git a/perl/Git/SVN/Editor.pm b/perl/Git/SVN/Editor.pm
index 34e8af966c..4088f13e72 100644
--- a/perl/Git/SVN/Editor.pm
+++ b/perl/Git/SVN/Editor.pm
@@ -288,6 +288,40 @@ sub apply_autoprops {
 	}
 }
 
+sub check_attr {
+	my ($attr,$path) = @_;
+	my $val = command_oneline("check-attr", $attr, "--", $path);
+	if ($val) { $val =~ s/^[^:]*:\s*[^:]*:\s*(.*)\s*$/$1/; }
+	return $val;
+}
+
+sub apply_manualprops {
+	my ($self, $file, $fbat) = @_;
+	my $pending_properties = check_attr( "svn-properties", $file );
+	if ($pending_properties eq "") { return; }
+	# Parse the list of properties to set.
+	my @props = split(/;/, $pending_properties);
+	# TODO: get existing properties to compare to
+	# - this fails for add so currently not done
+	# my $existing_props = ::get_svnprops($file);
+	my $existing_props = {};
+	# TODO: caching svn properties or storing them in .gitattributes
+	# would make that faster
+	foreach my $prop (@props) {
+		# Parse 'name=value' syntax and set the property.
+		if ($prop =~ /([^=]+)=(.*)/) {
+			my ($n,$v) = ($1,$2);
+			for ($n, $v) {
+				s/^\s+//; s/\s+$//;
+			}
+			my $existing = $existing_props->{$n};
+			if (!defined($existing) || $existing ne $v) {
+			    $self->change_file_prop($fbat, $n, $v);
+			}
+		}
+	}
+}
+
 sub A {
 	my ($self, $m, $deletions) = @_;
 	my ($dir, $file) = split_path($m->{file_b});
@@ -296,6 +330,7 @@ sub A {
 					undef, -1);
 	print "\tA\t$m->{file_b}\n" unless $::_q;
 	$self->apply_autoprops($file, $fbat);
+	$self->apply_manualprops($m->{file_b}, $fbat);
 	$self->chg_file($fbat, $m);
 	$self->close_file($fbat,undef,$self->{pool});
 }
@@ -311,6 +346,7 @@ sub C {
 	my $fbat = $self->add_file($self->repo_path($m->{file_b}), $pbat,
 				$upa, $self->{r});
 	print "\tC\t$m->{file_a} => $m->{file_b}\n" unless $::_q;
+	$self->apply_manualprops($m->{file_b}, $fbat);
 	$self->chg_file($fbat, $m);
 	$self->close_file($fbat,undef,$self->{pool});
 }
@@ -333,6 +369,7 @@ sub R {
 				$upa, $self->{r});
 	print "\tR\t$m->{file_a} => $m->{file_b}\n" unless $::_q;
 	$self->apply_autoprops($file, $fbat);
+	$self->apply_manualprops($m->{file_b}, $fbat);
 	$self->chg_file($fbat, $m);
 	$self->close_file($fbat,undef,$self->{pool});
 
@@ -348,6 +385,7 @@ sub M {
 	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;
+	$self->apply_manualprops($m->{file_b}, $fbat);
 	$self->chg_file($fbat, $m);
 	$self->close_file($fbat,undef,$self->{pool});
 }
diff --git a/t/t9148-git-svn-propset.sh b/t/t9148-git-svn-propset.sh
new file mode 100755
index 0000000000..102639090c
--- /dev/null
+++ b/t/t9148-git-svn-propset.sh
@@ -0,0 +1,95 @@
+#!/bin/sh
+#
+# Copyright (c) 2014 Alfred Perlstein
+#
+
+test_description='git svn propset tests'
+
+. ./lib-git-svn.sh
+
+foo_subdir2="subdir/subdir2/foo_subdir2"
+
+set -e
+mkdir import &&
+(set -e ; cd import
+	mkdir subdir
+	mkdir subdir/subdir2
+	touch foo 		# for 'add props top level'
+	touch subdir/foo_subdir # for 'add props relative'
+	touch "$foo_subdir2"	# for 'add props subdir'
+	svn_cmd import -m 'import for git svn' . "$svnrepo" >/dev/null
+)
+rm -rf import
+
+test_expect_success 'initialize git svn' '
+	git svn init "$svnrepo"
+	'
+
+test_expect_success 'fetch revisions from svn' '
+	git svn fetch
+	'
+
+set_props () {
+	subdir="$1"
+	file="$2"
+	shift;shift;
+	(cd "$subdir" &&
+		while [ $# -gt 0 ] ; do
+			git svn propset "$1" "$2" "$file" || exit 1
+			shift;shift;
+		done &&
+		echo hello >> "$file" &&
+		git commit -m "testing propset" "$file")
+}
+
+confirm_props () {
+	subdir="$1"
+	file="$2"
+	shift;shift;
+	(set -e ; cd "svn_project/$subdir" &&
+		while [ $# -gt 0 ] ; do
+			test "$(svn_cmd propget "$1" "$file")" = "$2" || exit 1
+			shift;shift;
+		done)
+}
+
+
+#The current implementation has a restriction:
+#svn propset will be taken as a delta for svn dcommit only
+#if the file content is also modified
+test_expect_success 'add props top level' '
+	set_props "." "foo" "svn:keywords" "FreeBSD=%H" &&
+	git svn dcommit &&
+	svn_cmd co "$svnrepo" svn_project &&
+	confirm_props "." "foo" "svn:keywords" "FreeBSD=%H" &&
+	rm -rf svn_project
+	'
+
+test_expect_success 'add multiple props' '
+	set_props "." "foo" \
+		"svn:keywords" "FreeBSD=%H" fbsd:nokeywords yes &&
+	git svn dcommit &&
+	svn_cmd co "$svnrepo" svn_project &&
+	confirm_props "." "foo" \
+		"svn:keywords" "FreeBSD=%H" fbsd:nokeywords yes &&
+	rm -rf svn_project
+	'
+
+test_expect_success 'add props subdir' '
+	set_props "." "$foo_subdir2" svn:keywords "FreeBSD=%H" &&
+	git svn dcommit &&
+	svn_cmd co "$svnrepo" svn_project &&
+	confirm_props "." "$foo_subdir2" "svn:keywords" "FreeBSD=%H" &&
+	rm -rf svn_project
+	'
+
+test_expect_success 'add props relative' '
+	set_props "subdir/subdir2" "../foo_subdir" \
+		svn:keywords "FreeBSD=%H" &&
+	git svn dcommit &&
+	svn_cmd co "$svnrepo" svn_project &&
+	confirm_props "subdir/subdir2" "../foo_subdir" \
+		svn:keywords "FreeBSD=%H" &&
+	rm -rf svn_project
+	'
+test_done