[PATCH] commit: allow --amend to reuse message from another commit
From: Junio C Hamano <hidden>
Date: 2016-06-15 22:43:59
Subsystem:
the rest · Maintainer:
Linus Torvalds
After tentatively applying a patch from a contributor, you can get a
replacement patch with corrected code and unusable commit log message.
In such a case, this sequence ought to give you an editor based on the
message in the earlier commit, to let you describe an incremental
improvement:
git reset --hard HEAD^ ;# discard the earlier one
git am <corrected-patch
git commit --amend -c HEAD@{1}
Unfortunately, --amend insisted reusing the message from the commit
being amended, ignoring the -c option. This corrects it.
Signed-off-by: Junio C Hamano <redacted>
---
* This was supported in the scripted version if --amend came before -c,
but it was broken if the flags were given in the other order.
builtin-commit.c | 2 +-
t/t7501-commit.sh | 17 +++++++++++++++++
2 files changed, 18 insertions(+), 1 deletions(-)
diff --git a/builtin-commit.c b/builtin-commit.c
index ad9f921..518ebe0 100644
--- a/builtin-commit.c
+++ b/builtin-commit.c@@ -537,7 +537,7 @@ static int parse_and_validate_options(int argc, const char *argv[], die("Option -m cannot be combined with -c/-C/-F."); if (edit_message) use_message = edit_message; - if (amend) + if (amend && !use_message) use_message = "HEAD"; if (use_message) { unsigned char sha1[20];
diff --git a/t/t7501-commit.sh b/t/t7501-commit.sh
index 05aa97d..d1a415a 100755
--- a/t/t7501-commit.sh
+++ b/t/t7501-commit.sh@@ -310,4 +310,21 @@ test_expect_success 'same tree (merge and amend merge)' ' ' +test_expect_success 'amend using the message from another commit' ' + + git reset --hard && + test_tick && + git commit --allow-empty -m "old commit" && + old=$(git rev-parse --verify HEAD) && + test_tick && + git commit --allow-empty -m "new commit" && + new=$(git rev-parse --verify HEAD) && + test_tick && + git commit --allow-empty --amend -C "$old" && + git show --pretty="format:%ad %s" "$old" >expected && + git show --pretty="format:%ad %s" HEAD >actual && + diff -u expected actual + +' + test_done