--keep-base rebases onto the merge base of the given upstream and the
current HEAD regardless of whether a branch is given. This is contrary
to the documentation and to the option's intended purpose. Instead,
rebase onto the merge base of the given upstream and the given branch.
Signed-off-by: Alex Henrie <alexhenrie24@xxxxxxxxx>
---
v2: clear previous test cruft more efficiently
---
Documentation/git-rebase.txt | 5 +--
builtin/rebase.c | 55 ++++++++++++++++----------------
t/t3416-rebase-onto-threedots.sh | 29 +++++++++++++++++
3 files changed, 60 insertions(+), 29 deletions(-)
diff --git a/Documentation/git-rebase.txt b/Documentation/git-rebase.txt
index 9da4647061..262fb01aec 100644
--- a/Documentation/git-rebase.txt
+++ b/Documentation/git-rebase.txt
@@ -215,9 +215,10 @@ leave out at most one of A and B, in which case it defaults to HEAD.
--keep-base::
Set the starting point at which to create the new commits to the
- merge base of <upstream> <branch>. Running
+ merge base of <upstream> and <branch>. Running
'git rebase --keep-base <upstream> <branch>' is equivalent to
- running 'git rebase --onto <upstream>... <upstream>'.
+ running
+ 'git rebase --onto <upstream>...<branch> <upstream> <branch>'.
+
This option is useful in the case where one is developing a feature on
top of an upstream branch. While the feature is being worked on, the
diff --git a/builtin/rebase.c b/builtin/rebase.c
index 27fde7bf28..7f3bffc0a2 100644
--- a/builtin/rebase.c
+++ b/builtin/rebase.c
@@ -1583,33 +1583,6 @@ int cmd_rebase(int argc, const char **argv, const char *prefix)
options.upstream_arg = "--root";
}
- /* Make sure the branch to rebase onto is valid. */
- if (keep_base) {
- strbuf_reset(&buf);
- strbuf_addstr(&buf, options.upstream_name);
- strbuf_addstr(&buf, "...");
- options.onto_name = xstrdup(buf.buf);
- } else if (!options.onto_name)
- options.onto_name = options.upstream_name;
- if (strstr(options.onto_name, "...")) {
- if (get_oid_mb(options.onto_name, &merge_base) < 0) {
- if (keep_base)
- die(_("'%s': need exactly one merge base with branch"),
- options.upstream_name);
- else
- die(_("'%s': need exactly one merge base"),
- options.onto_name);
- }
- options.onto = lookup_commit_or_die(&merge_base,
- options.onto_name);
- } else {
- options.onto =
- lookup_commit_reference_by_name(options.onto_name);
- if (!options.onto)
- die(_("Does not point to a valid commit '%s'"),
- options.onto_name);
- }
-
/*
* If the branch to rebase is given, that is the branch we will rebase
* branch_name -- branch/commit being rebased, or
@@ -1659,6 +1632,34 @@ int cmd_rebase(int argc, const char **argv, const char *prefix)
} else
BUG("unexpected number of arguments left to parse");
+ /* Make sure the branch to rebase onto is valid. */
+ if (keep_base) {
+ strbuf_reset(&buf);
+ strbuf_addstr(&buf, options.upstream_name);
+ strbuf_addstr(&buf, "...");
+ strbuf_addstr(&buf, branch_name);
+ options.onto_name = xstrdup(buf.buf);
+ } else if (!options.onto_name)
+ options.onto_name = options.upstream_name;
+ if (strstr(options.onto_name, "...")) {
+ if (get_oid_mb(options.onto_name, &merge_base) < 0) {
+ if (keep_base)
+ die(_("'%s': need exactly one merge base with branch"),
+ options.upstream_name);
+ else
+ die(_("'%s': need exactly one merge base"),
+ options.onto_name);
+ }
+ options.onto = lookup_commit_or_die(&merge_base,
+ options.onto_name);
+ } else {
+ options.onto =
+ lookup_commit_reference_by_name(options.onto_name);
+ if (!options.onto)
+ die(_("Does not point to a valid commit '%s'"),
+ options.onto_name);
+ }
+
if (options.fork_point > 0) {
struct commit *head =
lookup_commit_reference(the_repository,
diff --git a/t/t3416-rebase-onto-threedots.sh b/t/t3416-rebase-onto-threedots.sh
index 3716a42e81..3e04802cb0 100755
--- a/t/t3416-rebase-onto-threedots.sh
+++ b/t/t3416-rebase-onto-threedots.sh
@@ -129,6 +129,20 @@ test_expect_success 'rebase --keep-base main from topic' '
test_cmp expect actual
'
+test_expect_success 'rebase --keep-base main topic from main' '
+ git checkout main &&
+ git branch -f topic G &&
+
+ git rebase --keep-base main topic &&
+ git rev-parse C >base.expect &&
+ git merge-base main HEAD >base.actual &&
+ test_cmp base.expect base.actual &&
+
+ git rev-parse HEAD~2 >actual &&
+ git rev-parse C^0 >expect &&
+ test_cmp expect actual
+'
+
test_expect_success 'rebase --keep-base main from side' '
git reset --hard &&
git checkout side &&
@@ -153,6 +167,21 @@ test_expect_success 'rebase -i --keep-base main from topic' '
test_cmp expect actual
'
+test_expect_success 'rebase -i --keep-base main topic from main' '
+ git checkout main &&
+ git branch -f topic G &&
+
+ set_fake_editor &&
+ EXPECT_COUNT=2 git rebase -i --keep-base main topic &&
+ git rev-parse C >base.expect &&
+ git merge-base main HEAD >base.actual &&
+ test_cmp base.expect base.actual &&
+
+ git rev-parse HEAD~2 >actual &&
+ git rev-parse C^0 >expect &&
+ test_cmp expect actual
+'
+
test_expect_success 'rebase -i --keep-base main from side' '
git reset --hard &&
git checkout side &&
--
2.36.0
