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>

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