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[PATCH v4 16/29] sequencer: add trailers to message before writing file

From
Li Chen <me@linux.beauty>
Date
Oct 14, 2025, 12:24 UTC
Message-ID
<20251014122452.1851103-17-me@linux.beauty>
In-Reply-To
<20251014122452.1851103-1-me@linux.beauty>

Added trailer processing to the in-memory commit message within do_pick_commit, ensuring fixup/squash commands remain untouched before the message is written.

Signed-off-by: Li Chen <chenl311@chinatelecom.cn>
---
 sequencer.c | 19 ++++++++-----------
 trailer.c   |  4 ++--
 trailer.h   |  3 +++
 3 files changed, 13 insertions(+), 13 deletions(-)
diff --git a/sequencer.c b/sequencer.c
index 5103ae786c..552e629e4f 100644
--- a/sequencer.c
+++ b/sequencer.c
@@ -2444,6 +2444,14 @@ static int do_pick_commit(struct repository *r,
 	if (opts->signoff && !is_fixup(command))
 		append_signoff(&ctx->message, 0, 0);
 
+	if (opts->trailer_args.nr && !is_fixup(command)) {
+		if (amend_strbuf_with_trailers(&ctx->message,
+					       &opts->trailer_args)) {
+			res = error(_("unable to add trailers to commit message"));
+			goto leave;
+		}
+	}
+
 	if (is_rebase_i(opts) && write_author_script(msg.message) < 0)
 		res = -1;
 	else if (!opts->strategy ||
@@ -2519,17 +2527,6 @@ static int do_pick_commit(struct repository *r,
 			oid_to_hex(&commit->object.oid), msg.subject);
 	} /* else allow == 0 and there's nothing special to do */
 
-	if (!res && opts->trailer_args.nr && !drop_commit) {
-		const char *trailer_file =
-			msg_file ? msg_file : git_path_merge_msg(r);
-
-		if (amend_file_with_trailers(trailer_file,
-						&opts->trailer_args)) {
-			res = error(_("unable to add trailers to commit message"));
-			goto leave;
-		}
-	}
-
 	if (!opts->no_commit && !drop_commit) {
 		if (author || command == TODO_REVERT || (flags & AMEND_MSG))
 			res = do_commit(r, msg_file, author, reflog_action,
diff --git a/trailer.c b/trailer.c
index 5ff518b436..fb691c6400 100644
--- a/trailer.c
+++ b/trailer.c
@@ -1250,8 +1250,8 @@ void trailer_iterator_release(struct trailer_iterator *iter)
 	strbuf_release(&iter->key);
 }
 
-static int amend_strbuf_with_trailers(struct strbuf *buf,
-									  const struct strvec *trailer_args)
+int amend_strbuf_with_trailers(struct strbuf *buf,
+       const struct strvec *trailer_args)
 {
 	struct process_trailer_options opts = PROCESS_TRAILER_OPTIONS_INIT;
 	LIST_HEAD(new_trailer_head);
diff --git a/trailer.h b/trailer.h
index 28719aa480..e4b1de855e 100644
--- a/trailer.h
+++ b/trailer.h
@@ -197,6 +197,9 @@ int trailer_iterator_advance(struct trailer_iterator *iter);
  */
 void trailer_iterator_release(struct trailer_iterator *iter);
 
+int amend_strbuf_with_trailers(struct strbuf *buf,
+       const struct strvec *trailer_args);
+
 /*
  * Augment a file to add trailers to it (similar to 'git interpret-trailers').
  * Returns 0 on success or a non-zero error code on failure.
-- 
2.51.0
Previous: Li ChenNext: Kristoffer Haugsbakk
Message 21 of 43 in “rebase: support --trailer”
  1. 00/29 rebase: support --trailerLi Chen, Oct 14, 2025
  2. 01/29 trailer: append trailers in-process and drop the fork to `interpret-trailers`Li Chen, Oct 14, 2025
  3. Kristoffer HaugsbakkOct 14, 2025
  4. Li ChenOct 21, 2025
  5. 02/29 trailer: restore interpret_trailers helperLi Chen, Oct 14, 2025
  6. 03/29 trailer: drop --trailer prefix handling in amend helperLi Chen, Oct 14, 2025
  7. 04/29 trailer: move config_head and arg_head to if storageLi Chen, Oct 14, 2025
  8. 05/29 trailer: use bool for had_trailer_beforeLi Chen, Oct 14, 2025
  9. 06/29 interpret-trailers: buffer stdout outputLi Chen, Oct 14, 2025
  10. 07/29 trailer: mirror interpret-trailers output flowLi Chen, Oct 14, 2025
  11. 08/29 trailer: handle trailer append failures gentlyLi Chen, Oct 14, 2025
  12. 09/29 rebase: support --trailerLi Chen, Oct 14, 2025
  13. Kristoffer HaugsbakkOct 14, 2025
  14. Li ChenOct 22, 2025
  15. 10/29 rebase: inline trailer state pathsLi Chen, Oct 14, 2025
  16. 11/29 rebase: reuse buffer for trailer argsLi Chen, Oct 14, 2025
  17. 12/29 rebase: drop redundant strbuf_release callLi Chen, Oct 14, 2025
  18. 13/29 rebase: skip stripping of --trailer option prefixLi Chen, Oct 14, 2025
  19. 14/29 rebase: die on invalid trailer argsLi Chen, Oct 14, 2025
  20. 15/29 rebase: validate trailers with configured separatorsLi Chen, Oct 14, 2025
  21. 16/29 sequencer: add trailers to message before writing fileLi Chen, Oct 14, 2025
  22. Kristoffer HaugsbakkOct 14, 2025
  23. 17/29 tests: t3440: create expect files at point of useLi Chen, Oct 14, 2025
  24. Kristoffer HaugsbakkOct 14, 2025
  25. Li ChenOct 15, 2025
  26. Kristoffer HaugsbakkOct 15, 2025
  27. Phillip WoodOct 23, 2025
  28. Li ChenOct 28, 2025
  29. Phillip WoodNov 3, 2025
  30. 18/29 tests: t3440: check apply backend error includes optionLi Chen, Oct 14, 2025
  31. 19/29 tests: t3440: use test_commit_message for trailer checksLi Chen, Oct 14, 2025
  32. 20/29 tests: t3440: drop redundant resets and pass branch to rebase where neededLi Chen, Oct 14, 2025
  33. 21/29 tests: t3440: assert trailer on HEAD after conflict rebaseLi Chen, Oct 14, 2025
  34. 22/29 rebase: persist --trailer options across restartsLi Chen, Oct 14, 2025
  35. 23/29 tests: t3440: remove redundant --keep-emptyLi Chen, Oct 14, 2025
  36. 24/29 tests: t3440: use helper for trailer checksLi Chen, Oct 14, 2025
  37. 25/29 tests: t3440: test --trailer without valuesLi Chen, Oct 14, 2025
  38. Kristoffer HaugsbakkOct 14, 2025
  39. 26/29 tests: t3440: convert ex.com to example.comLi Chen, Oct 14, 2025
  40. 27/29 tests: t3440: ensure trailers persist after rebase continueLi Chen, Oct 14, 2025
  41. 28/29 tests: t3440: exercise trailer config mappingLi Chen, Oct 14, 2025
  42. 29/29 sequencer: honor --trailer with fixup -CLi Chen, Oct 14, 2025
  43. Li ChenOct 14, 2025

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