From: Elijah Newren <newren@xxxxxxxxx>
There are both merge and rebase branches in the logic, and previously
both had to handle fast-forwarding. Merge handled that implicitly
(because git merge handles it directly), while in rebase it was
explicit. Given that the --ff-only flag is meant to override any
--rebase or --no-rebase, make the code reflect that by handling
--ff-only before the merge-vs-rebase logic.
It turns out that this also fixes a bug for submodules. Previously,
when --ff-only was given, the code would run `merge --ff-only` on the
main module, and then run `submodule update --recursive --rebase` on the
submodules. With this change, we still run `merge --ff-only` on the
main module, but now run `submodule update --recursive --checkout` on
the submodules. I believe this better reflects the intent of --ff-only
to have it apply to both the main module and the submodules.
(Sidenote: It is somewhat interesting that all merges pass `--checkout`
to submodule update, even when `--no-ff` is specified, meaning that it
will only do fast-forward merges for submodules. This was discussed in
commit a6d7eb2c7a ("pull: optionally rebase submodules (remote submodule
changes only)", 2017-06-23). The same limitations apply now as then, so
we are not trying to fix this at this time.)
Signed-off-by: Elijah Newren <newren@xxxxxxxxx>
---
builtin/pull.c | 24 +++++++++---------------
t/t5520-pull.sh | 6 +++---
2 files changed, 12 insertions(+), 18 deletions(-)
diff --git a/builtin/pull.c b/builtin/pull.c
index d9796604825..92150f976cd 100644
--- a/builtin/pull.c
+++ b/builtin/pull.c
@@ -1046,15 +1046,15 @@ int cmd_pull(int argc, const char **argv, const char *prefix)
can_ff = get_can_ff(&orig_head, &merge_heads.oid[0]);
- if (!can_ff) {
- if (opt_ff) {
- if (!strcmp(opt_ff, "--ff-only"))
- die_ff_impossible();
- } else {
- if (rebase_unspecified && opt_verbosity >= 0)
- show_advice_pull_non_ff();
- }
+ /* ff-only takes precedence over rebase */
+ if (opt_ff && !strcmp(opt_ff, "--ff-only")) {
+ if (!can_ff)
+ die_ff_impossible();
+ opt_rebase = REBASE_FALSE;
}
+ /* If no action specified and we can't fast forward, then warn. */
+ if (!opt_ff && rebase_unspecified && !can_ff)
+ show_advice_pull_non_ff();
if (opt_rebase) {
int ret = 0;
@@ -1069,13 +1069,7 @@ int cmd_pull(int argc, const char **argv, const char *prefix)
submodule_touches_in_range(the_repository, &upstream, &curr_head))
die(_("cannot rebase with locally recorded submodule modifications"));
- if (can_ff) {
- /* we can fast-forward this without invoking rebase */
- opt_ff = "--ff-only";
- ret = run_merge();
- } else {
- ret = run_rebase(&newbase, &upstream);
- }
+ ret = run_rebase(&newbase, &upstream);
if (!ret && (recurse_submodules == RECURSE_SUBMODULES_ON ||
recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND))
diff --git a/t/t5520-pull.sh b/t/t5520-pull.sh
index e2c0c510222..4b50488141f 100755
--- a/t/t5520-pull.sh
+++ b/t/t5520-pull.sh
@@ -295,7 +295,7 @@ test_expect_success '--rebase (merge) fast forward' '
# The above only validates the result. Did we actually bypass rebase?
git reflog -1 >reflog.actual &&
sed "s/^[0-9a-f][0-9a-f]*/OBJID/" reflog.actual >reflog.fuzzy &&
- echo "OBJID HEAD@{0}: pull --rebase . ff: Fast-forward" >reflog.expected &&
+ echo "OBJID HEAD@{0}: pull --rebase . ff (finish): returning to refs/heads/to-rebase" >reflog.expected &&
test_cmp reflog.expected reflog.fuzzy
'
@@ -307,8 +307,8 @@ test_expect_success '--rebase (am) fast forward' '
# The above only validates the result. Did we actually bypass rebase?
git reflog -1 >reflog.actual &&
- sed "s/^[0-9a-f][0-9a-f]*/OBJID/" reflog.actual >reflog.fuzzy &&
- echo "OBJID HEAD@{0}: pull --rebase . ff: Fast-forward" >reflog.expected &&
+ sed -e "s/^[0-9a-f][0-9a-f]*/OBJID/" -e "s/[0-9a-f][0-9a-f]*$/OBJID/" reflog.actual >reflog.fuzzy &&
+ echo "OBJID HEAD@{0}: rebase finished: refs/heads/to-rebase onto OBJID" >reflog.expected &&
test_cmp reflog.expected reflog.fuzzy
'
--
gitgitgadget
