apply, fmt-merge-msg: use relative filenames

Commit dbd0f5c7 (Files given on the command line are relative to $cwd,
2008-08-06) only fixed git-commit and git-tag. But, git-apply and
git-fmt-merge-msg didn't get the update and exhibit the same behavior.

Fix them and add tests for "apply --build-fake-ancestor" and
"fmt-merge-msg -F".

Signed-off-by: Stephen Boyd <bebarino@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin-apply.c

@@ -3316,6 +3316,10 @@ int cmd_apply(int argc, const char **argv, const char *unused_prefix)
 
 	argc = parse_options(argc, argv, builtin_apply_options,
 			apply_usage, 0);
+	fake_ancestor = parse_options_fix_filename(prefix, fake_ancestor);
+	if (fake_ancestor)
+		fake_ancestor = xstrdup(fake_ancestor);
+
 	if (apply_with_reject)
 		apply = apply_verbosely = 1;
 	if (!force_apply && (diffstat || numstat || summary || check || fake_ancestor))

builtin-fmt-merge-msg.c

@@ -365,6 +365,7 @@ int cmd_fmt_merge_msg(int argc, const char **argv, const char *prefix)
 	argc = parse_options(argc, argv, options, fmt_merge_msg_usage, 0);
 	if (argc > 0)
 		usage_with_options(fmt_merge_msg_usage, options);
+	inpath = parse_options_fix_filename(prefix, inpath);
 
 	if (inpath && strcmp(inpath, "-")) {
 		in = fopen(inpath, "r");

t/t4131-apply-fake-ancestor.sh

@@ -0,0 +1,42 @@
+#!/bin/sh
+#
+# Copyright (c) 2009 Stephen Boyd
+#
+
+test_description='git apply --build-fake-ancestor handling.'
+
+. ./test-lib.sh
+
+test_expect_success 'setup' '
+	test_commit 1 &&
+	test_commit 2 &&
+	mkdir sub &&
+	test_commit 3 sub/3 &&
+	test_commit 4
+'
+
+test_expect_success 'apply --build-fake-ancestor' '
+	git checkout 2 &&
+	echo "A" > 1.t &&
+	git diff > 1.patch &&
+	git reset --hard &&
+	git checkout 1 &&
+	git apply --build-fake-ancestor 1.ancestor 1.patch
+'
+
+test_expect_success 'apply --build-fake-ancestor in a subdirectory' '
+	git checkout 3 &&
+	echo "C" > sub/3.t &&
+	git diff > 3.patch &&
+	git reset --hard &&
+	git checkout 4 &&
+	(
+		cd sub &&
+		git apply --build-fake-ancestor 3.ancestor ../3.patch &&
+		test -f 3.ancestor
+	) &&
+	git apply --build-fake-ancestor 3.ancestor 3.patch &&
+	test_cmp sub/3.ancestor 3.ancestor
+'
+
+test_done

t/t6200-fmt-merge-msg.sh

@@ -208,4 +208,36 @@ test_expect_success 'merge-msg test #5-2' '
 	test_cmp expected actual
 '
 
+test_expect_success 'merge-msg -F' '
+
+	git config --unset-all merge.log
+	git config --unset-all merge.summary
+	git config merge.summary yes &&
+
+	git checkout master &&
+	setdate &&
+	git fetch . left right &&
+
+	git fmt-merge-msg -F .git/FETCH_HEAD >actual &&
+	test_cmp expected actual
+'
+
+test_expect_success 'merge-msg -F in subdirectory' '
+
+	git config --unset-all merge.log
+	git config --unset-all merge.summary
+	git config merge.summary yes &&
+
+	git checkout master &&
+	setdate &&
+	git fetch . left right &&
+	mkdir sub &&
+	cp .git/FETCH_HEAD sub/FETCH_HEAD &&
+	(
+		cd sub &&
+		git fmt-merge-msg -F FETCH_HEAD >../actual
+	) &&
+	test_cmp expected actual
+'
+
 test_done