merge(third_party/git): Merge squashed git subtree at v2.23.0

Merge commit '1b593e1ea4' as 'third_party/git'

third_party/git/t/t9105-git-svn-commit-diff.sh

@@ -0,0 +1,44 @@
+#!/bin/sh
+#
+# Copyright (c) 2006 Eric Wong
+test_description='git svn commit-diff'
+. ./lib-git-svn.sh
+
+test_expect_success 'initialize repo' '
+	mkdir import &&
+	(
+		cd import &&
+		echo hello >readme &&
+		svn_cmd import -m "initial" . "$svnrepo"
+	) &&
+	echo hello > readme &&
+	git update-index --add readme &&
+	git commit -a -m "initial" &&
+	echo world >> readme &&
+	git commit -a -m "another"
+	'
+
+head=$(git rev-parse --verify HEAD^0)
+prev=$(git rev-parse --verify HEAD^1)
+
+# the internals of the commit-diff command are the same as the regular
+# commit, so only a basic test of functionality is needed since we've
+# already tested commit extensively elsewhere
+
+test_expect_success 'test the commit-diff command' '
+	test -n "$prev" && test -n "$head" &&
+	git svn commit-diff -r1 "$prev" "$head" "$svnrepo" &&
+	svn_cmd co "$svnrepo" wc &&
+	cmp readme wc/readme
+	'
+
+test_expect_success 'commit-diff to a sub-directory (with git svn config)' '
+	svn_cmd import -m "sub-directory" import "$svnrepo"/subdir &&
+	git svn init --minimize-url "$svnrepo"/subdir &&
+	git svn fetch &&
+	git svn commit-diff -r3 "$prev" "$head" &&
+	svn_cmd cat "$svnrepo"/subdir/readme > readme.2 &&
+	cmp readme readme.2
+	'
+
+test_done