From bc47139f4ff6c0c41d4c854ca74c35b1006a464a Mon Sep 17 00:00:00 2001 From: Jeff King Date: Mon, 19 Feb 2024 20:09:36 -0500 Subject: [PATCH] trailer: fix comment/cut-line regression with opts->no_divider Commit 97e9d0b78a (trailer: find the end of the log message, 2023-10-20) combined two code paths for finding the end of the log message. For the "no_divider" case, we used to use find_trailer_end(), and that has now been rolled into find_end_of_log_message(). But there's a regression; that function returns early when no_divider is set, returning the whole string. That's not how find_trailer_end() behaved. Although it did skip the "---" processing (which is what "no_divider" is meant to do), we should still respect ignored_log_message_bytes(), which covers things like comments, "commit -v" cut lines, and so on. The bug is actually in the interpret-trailers command, but the obvious way to experience it is by running "commit -v" with a "--trailer" option. The new trailer will be added at the end of the verbose diff, rather than before it (and consequently will be ignored entirely, since everything after the diff's intro scissors line is thrown away). I've added two tests here: one for interpret-trailers directly, which shows the bug via the parsing routines, and one for "commit -v". The fix itself is pretty simple: instead of returning early, no_divider just skips the "---" handling but still calls ignored_log_message_bytes(). Reported-by: Philippe Blain Signed-off-by: Jeff King Signed-off-by: Junio C Hamano --- t/t7502-commit-porcelain.sh | 18 ++++++++++++++++++ t/t7513-interpret-trailers.sh | 19 +++++++++++++++++++ trailer.c | 15 +++++++-------- 3 files changed, 44 insertions(+), 8 deletions(-) diff --git a/t/t7502-commit-porcelain.sh b/t/t7502-commit-porcelain.sh index b5bf7de7cd..d8e216613f 100755 --- a/t/t7502-commit-porcelain.sh +++ b/t/t7502-commit-porcelain.sh @@ -485,6 +485,24 @@ test_expect_success 'commit --trailer not confused by --- separator' ' test_cmp expected actual ' +test_expect_success 'commit --trailer with --verbose' ' + cat >msg <<-\EOF && + subject + + body + EOF + GIT_EDITOR=: git commit --edit -F msg --allow-empty \ + --trailer="my-trailer: value" --verbose && + { + cat msg && + echo && + echo "my-trailer: value" + } >expected && + git cat-file commit HEAD >commit.msg && + sed -e "1,/^\$/d" commit.msg >actual && + test_cmp expected actual +' + test_expect_success 'multiple -m' ' >negative && diff --git a/t/t7513-interpret-trailers.sh b/t/t7513-interpret-trailers.sh index 97f10905d2..3343ad0eb6 100755 --- a/t/t7513-interpret-trailers.sh +++ b/t/t7513-interpret-trailers.sh @@ -1560,4 +1560,23 @@ test_expect_success 'suppress --- handling' ' test_cmp expected actual ' +test_expect_success 'suppressing --- does not disable cut-line handling' ' + echo "real-trailer: before the cut" >expected && + + git interpret-trailers --parse --no-divider >actual <<-\EOF && + subject + + This input has a cut-line in it; we should stop parsing when we see it + and consider only trailers before that line. + + real-trailer: before the cut + + # ------------------------ >8 ------------------------ + # Nothing below this line counts as part of the commit message. + not-a-trailer: too late + EOF + + test_cmp expected actual +' + test_done diff --git a/trailer.c b/trailer.c index 816f8b28a9..009ee80dee 100644 --- a/trailer.c +++ b/trailer.c @@ -837,16 +837,15 @@ static size_t find_end_of_log_message(const char *input, int no_divider) /* Assume the naive end of the input is already what we want. */ end = strlen(input); - if (no_divider) - return end; - /* Optionally skip over any patch part ("---" line and below). */ - for (s = input; *s; s = next_line(s)) { - const char *v; + if (!no_divider) { + for (s = input; *s; s = next_line(s)) { + const char *v; - if (skip_prefix(s, "---", &v) && isspace(*v)) { - end = s - input; - break; + if (skip_prefix(s, "---", &v) && isspace(*v)) { + end = s - input; + break; + } } } -- 2.11.4.GIT