From: Elijah Newren <newren@xxxxxxxxx>
--[no-]reapply-cherry-picks was traditionally only supported by the
sequencer. Support was added for the apply backend, when --keep-base is
also specified, in commit ce5238a690 ("rebase --keep-base: imply
--reapply-cherry-picks", 2022-10-17). Make the code error out when
--[no-]reapply-cherry-picks is specified AND the apply backend is used
AND --keep-base is not specified. Also, clarify a number of comments
surrounding the interaction of these flags.
Helped-by: Phillip Wood <phillip.wood@xxxxxxxxxxxxx>
Signed-off-by: Elijah Newren <newren@xxxxxxxxx>
---
Documentation/git-rebase.txt | 2 +-
builtin/rebase.c | 34 ++++++++++++++++----------
t/t3422-rebase-incompatible-options.sh | 10 ++++++++
3 files changed, 32 insertions(+), 14 deletions(-)
diff --git a/Documentation/git-rebase.txt b/Documentation/git-rebase.txt
index 846aeed1b69..8a09f12d897 100644
--- a/Documentation/git-rebase.txt
+++ b/Documentation/git-rebase.txt
@@ -650,7 +650,7 @@ are incompatible with the following options:
* --exec
* --no-keep-empty
* --empty=
- * --reapply-cherry-picks
+ * --[no-]reapply-cherry-picks when used without --keep-base
* --edit-todo
* --update-refs
* --root when used without --onto
diff --git a/builtin/rebase.c b/builtin/rebase.c
index b742cc8fb5c..05b130bfae5 100644
--- a/builtin/rebase.c
+++ b/builtin/rebase.c
@@ -1224,13 +1224,6 @@ int cmd_rebase(int argc, const char **argv, const char *prefix)
if (options.fork_point < 0)
options.fork_point = 0;
}
- /*
- * --keep-base defaults to --reapply-cherry-picks to avoid losing
- * commits when using this option.
- */
- if (options.reapply_cherry_picks < 0)
- options.reapply_cherry_picks = keep_base;
-
if (options.root && options.fork_point > 0)
die(_("options '%s' and '%s' cannot be used together"), "--root", "--fork-point");
@@ -1406,12 +1399,27 @@ int cmd_rebase(int argc, const char **argv, const char *prefix)
if (options.empty != EMPTY_UNSPECIFIED)
imply_merge(&options, "--empty");
- /*
- * --keep-base implements --reapply-cherry-picks by altering upstream so
- * it works with both backends.
- */
- if (options.reapply_cherry_picks && !keep_base)
- imply_merge(&options, "--reapply-cherry-picks");
+ if (options.reapply_cherry_picks < 0)
+ /*
+ * We default to --no-reapply-cherry-picks unless
+ * --keep-base is given; when --keep-base is given, we want
+ * to default to --reapply-cherry-picks.
+ */
+ options.reapply_cherry_picks = keep_base;
+ else if (!keep_base)
+ /*
+ * The apply backend always searches for and drops cherry
+ * picks. This is often not wanted with --keep-base, so
+ * --keep-base allows --reapply-cherry-picks to be
+ * simulated by altering the upstream such that
+ * cherry-picks cannot be detected and thus all commits are
+ * reapplied. Thus, --[no-]reapply-cherry-picks is
+ * supported when --keep-base is specified, but not when
+ * --keep-base is left out.
+ */
+ imply_merge(&options, options.reapply_cherry_picks ?
+ "--reapply-cherry-picks" :
+ "--no-reapply-cherry-picks");
if (gpg_sign)
options.gpg_sign_opt = xstrfmt("-S%s", gpg_sign);
diff --git a/t/t3422-rebase-incompatible-options.sh b/t/t3422-rebase-incompatible-options.sh
index f86274990b0..826f3b94ae6 100755
--- a/t/t3422-rebase-incompatible-options.sh
+++ b/t/t3422-rebase-incompatible-options.sh
@@ -60,6 +60,16 @@ test_rebase_am_only () {
test_must_fail git rebase $opt --exec 'true' A
"
+ test_expect_success "$opt incompatible with --no-reapply-cherry-picks" "
+ git checkout B^0 &&
+ test_must_fail git rebase $opt --no-reapply-cherry-picks A
+ "
+
+ test_expect_success "$opt incompatible with --reapply-cherry-picks" "
+ git checkout B^0 &&
+ test_must_fail git rebase $opt --reapply-cherry-picks A
+ "
+
test_expect_success "$opt incompatible with --update-refs" "
git checkout B^0 &&
test_must_fail git rebase $opt --update-refs A
--
gitgitgadget
