git svn: add gc command

Add a git svn gc command that gzips all unhandled.log files, and
removes all index files under .git/svn.

Signed-off-by: Robert Allan Zeh <robert.a.zeh@gmail.com>
Signed-off-by: Eric Wong <normalperson@yhbt.net>

t/t9143-git-svn-gc.sh

@@ -0,0 +1,44 @@
+#!/bin/sh
+#
+# Copyright (c) 2009 Robert Allan Zeh
+
+test_description='git svn gc basic tests'
+
+. ./lib-git-svn.sh
+
+test_expect_success 'setup directories and test repo' '
+	mkdir import &&
+	mkdir tmp &&
+	echo "Sample text for Subversion repository." > import/test.txt &&
+	svn_cmd import -m "import for git svn" import "$svnrepo" > /dev/null
+	'
+
+test_expect_success 'checkout working copy from svn' \
+	'svn_cmd co "$svnrepo" test_wc'
+
+test_expect_success 'set some properties to create an unhandled.log file' '
+	(
+		cd test_wc &&
+		svn_cmd propset foo bar test.txt &&
+		svn_cmd commit -m "property set"
+	)'
+
+test_expect_success 'Setup repo' 'git svn init "$svnrepo"'
+
+test_expect_success 'Fetch repo' 'git svn fetch'
+
+test_expect_success 'make backup copy of unhandled.log' '
+	 cp .git/svn/git-svn/unhandled.log tmp
+	'
+
+test_expect_success 'git svn gc runs' 'git svn gc'
+
+test_expect_success 'git svn gc produces a valid gzip file' '
+	 gunzip .git/svn/git-svn/unhandled.log.gz
+	'
+
+test_expect_success 'git svn gc does not change unhandled.log files' '
+	 test_cmp .git/svn/git-svn/unhandled.log tmp/unhandled.log
+	'
+
+test_done