Before, when we rebased with a --fork-point invocation where the
fork-point wasn't empty, we would be setting options.restrict_revision.
The fast-forward logic would automatically declare that the rebase was
not fast-forwardable if it was set. However, this was painting with a
very broad brush.
Refine the logic so that we can fast-forward in the case where the
restricted revision is equal to the merge base, since we stop rebasing
at the merge base anyway.
Helped-by: Ævar Arnfjörð Bjarmason <avarab@xxxxxxxxx>
Signed-off-by: Denton Liu <liu.denton@xxxxxxxxx>
---
builtin/rebase.c | 9 +++++++--
t/t3432-rebase-fast-forward.sh | 12 ++++++------
2 files changed, 13 insertions(+), 8 deletions(-)
diff --git a/builtin/rebase.c b/builtin/rebase.c
index 7aa6a090d4..5f00d91b68 100644
--- a/builtin/rebase.c
+++ b/builtin/rebase.c
@@ -896,6 +896,7 @@ static int is_linear_history(struct commit *from, struct commit *to)
}
static int can_fast_forward(struct commit *onto, struct commit *upstream,
+ struct commit *restrict_revision,
struct object_id *head_oid, struct object_id *merge_base)
{
struct commit *head = lookup_commit(the_repository, head_oid);
@@ -915,6 +916,9 @@ static int can_fast_forward(struct commit *onto, struct commit *upstream,
goto done;
}
+ if (restrict_revision && !oideq(&restrict_revision->object.oid, merge_base))
+ goto done;
+
if (!upstream)
goto done;
@@ -1701,8 +1705,9 @@ int cmd_rebase(int argc, const char **argv, const char *prefix)
* Check if we are already based on onto with linear history,
* but this should be done if this is not an interactive rebase.
*/
- if (can_fast_forward(options.onto, options.upstream, &options.orig_head, &merge_base) &&
- !is_interactive(&options) && !options.restrict_revision) {
+ if (can_fast_forward(options.onto, options.upstream, options.restrict_revision,
+ &options.orig_head, &merge_base) &&
+ !is_interactive(&options)) {
int flag;
if (!(options.flags & REBASE_FORCE)) {
diff --git a/t/t3432-rebase-fast-forward.sh b/t/t3432-rebase-fast-forward.sh
index d0e5b1f3e6..1cb2896fb4 100755
--- a/t/t3432-rebase-fast-forward.sh
+++ b/t/t3432-rebase-fast-forward.sh
@@ -35,8 +35,8 @@ test_rebase_same_head success --onto B... B
test_rebase_same_head success --onto master... master
test_rebase_same_head success --no-fork-point
test_rebase_same_head success --fork-point master
-test_rebase_same_head failure --fork-point --onto B B
-test_rebase_same_head failure --fork-point --onto B... B
+test_rebase_same_head success --fork-point --onto B B
+test_rebase_same_head success --fork-point --onto B... B
test_rebase_same_head success --fork-point --onto master... master
test_expect_success 'add work to side' '
@@ -51,8 +51,8 @@ test_rebase_same_head success --onto B... B
test_rebase_same_head success --onto master... master
test_rebase_same_head success --no-fork-point
test_rebase_same_head success --fork-point master
-test_rebase_same_head failure --fork-point --onto B B
-test_rebase_same_head failure --fork-point --onto B... B
+test_rebase_same_head success --fork-point --onto B B
+test_rebase_same_head success --fork-point --onto B... B
test_rebase_same_head success --fork-point --onto master... master
test_expect_success 'add work to upstream' '
@@ -65,8 +65,8 @@ changes='our and their changes'
test_rebase_same_head success --onto B B
test_rebase_same_head success --onto B... B
test_rebase_same_head success --onto master... master
-test_rebase_same_head failure --fork-point --onto B B
-test_rebase_same_head failure --fork-point --onto B... B
+test_rebase_same_head success --fork-point --onto B B
+test_rebase_same_head success --fork-point --onto B... B
test_rebase_same_head success --fork-point --onto master... master
test_done
--
2.21.0.921.gb27c68c4e9
