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2.36 format-patch regression fix

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e900d494dc (diff: add an API for deferred freeing, 2021-02-11) added a
way to allow reusing diffopts: the no_free bit.  244c27242f (diff.[ch]:
have diff_free() call clear_pathspec(opts.pathspec), 2022-02-16) made
that mechanism mandatory.

git format-patch only sets no_free when --output is given, causing it to
forget pathspecs after the first commit.  Set no_free unconditionally
instead.

The existing test was unable to detect this breakage because it checks
stderr for the absence of a certain string, but format-patch writes to
stdout.  Also the test was not checking the case of one commit modifying
multiple files and a pathspec limiting the diff.  Replace it with a more
thorough one.

Signed-off-by: René Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
René Scharfe 2022-04-30 12:32:44 +02:00 committed by Junio C Hamano
parent 362f869ff2
commit 91f8f7e46f
2 changed files with 33 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
builtin/log.c
View File

@ -1883,6 +1883,7 @@ int cmd_format_patch(int argc, const char **argv, const char *prefix)
rev.diff = 1;
rev.max_parents = 1;
rev.diffopt.flags.recursive = 1;
rev.diffopt.no_free = 1;
rev.subject_prefix = fmt_patch_subject_prefix;
memset(&s_r_opt, 0, sizeof(s_r_opt));
s_r_opt.def = "HEAD";
@ -2008,13 +2009,7 @@ int cmd_format_patch(int argc, const char **argv, const char *prefix)
if (use_stdout) {
setup_pager();
} else if (rev.diffopt.close_file) {
/*
* The diff code parsed --output; it has already opened the
* file, but we must instruct it not to close after each diff.
*/
rev.diffopt.no_free = 1;
} else {
} else if (!rev.diffopt.close_file) {
int saved;
if (!output_directory)

33
t/t4014-format-patch.sh
View File

@ -926,11 +926,40 @@ test_expect_success 'format-patch --numstat should produce a patch' '
'
test_expect_success 'format-patch -- <path>' '
git format-patch main..side -- file 2>error &&
! grep "Use .--" error
rm -f *.patch &&
git checkout -b pathspec main &&
echo file_a 1 >file_a &&
echo file_b 1 >file_b &&
git add file_a file_b &&
git commit -m pathspec_initial &&
echo file_a 2 >>file_a &&
git add file_a &&
git commit -m pathspec_a &&
echo file_b 2 >>file_b &&
git add file_b &&
git commit -m pathspec_b &&
echo file_a 3 >>file_a &&
echo file_b 3 >>file_b &&
git add file_a file_b &&
git commit -m pathspec_ab &&
cat >expect <<-\EOF &&
0001-pathspec_initial.patch
0002-pathspec_a.patch
0003-pathspec_ab.patch
EOF
git format-patch main..pathspec -- file_a >output &&
test_cmp expect output &&
! grep file_b *.patch
'
test_expect_success 'format-patch --ignore-if-in-upstream HEAD' '
git checkout side &&
git format-patch --ignore-if-in-upstream HEAD
'