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[PATCH v4 04/19] pull: cleanup autostash check

From
Felipe Contreras <felipe.contreras@gmail.com>
Date
Dec 8, 2020, 00:26 UTC
Message-ID
<20201208002648.1370414-5-felipe.contreras@gmail.com>
In-Reply-To
<20201208002648.1370414-1-felipe.contreras@gmail.com>

Currently "git pull --rebase" takes a shortcut in the case a fast-forward merge is possible; run_merge() is called with --ff-only.

However, "git merge" didn't have an --autostash option, so, when "git pull --rebase --autostash" was called *and* the fast-forward merge shortcut was taken, then the pull failed.

This was fixed in commit f15e7cf5cc (pull: ff --rebase --autostash works in dirty repo, 2017-06-01) by simply skipping the fast-forward merge shortcut.

Later on "git merge" learned the --autostash option [a03b55530a (merge: teach --autostash option, 2020-04-07)], and so did "git pull" [d9f15d37f1 (pull: pass --autostash to merge, 2020-04-07)].

Therefore it's not necessary to skip the fast-forward merge shortcut anymore when called with --rebase --autostash.

Let's always take the fast-forward merge shortcut by essentially reverting f15e7cf5cc.

Reviewed-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com>
---
 builtin/pull.c | 15 ++++++---------
 1 file changed, 6 insertions(+), 9 deletions(-)
diff --git a/builtin/pull.c b/builtin/pull.c
index e2964a0b5f..d44ca2ffde 100644
--- a/builtin/pull.c
+++ b/builtin/pull.c
@@ -944,7 +944,6 @@ int cmd_pull(int argc, const char **argv, const char *prefix)
 	struct oid_array merge_heads = OID_ARRAY_INIT;
 	struct object_id orig_head, curr_head;
 	struct object_id rebase_fork_point;
-	int autostash;
 
 	if (!getenv("GIT_REFLOG_ACTION"))
 		set_reflog_message(argc, argv);
@@ -977,8 +976,8 @@ int cmd_pull(int argc, const char **argv, const char *prefix)
 	if (get_oid("HEAD", &orig_head))
 		oidclr(&orig_head);
 
-	autostash = config_autostash;
 	if (opt_rebase) {
+		int autostash = config_autostash;
 		if (opt_autostash != -1)
 			autostash = opt_autostash;
 
@@ -1053,13 +1052,11 @@ int cmd_pull(int argc, const char **argv, const char *prefix)
 		     recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND) &&
 		    submodule_touches_in_range(the_repository, &upstream, &curr_head))
 			die(_("cannot rebase with locally recorded submodule modifications"));
-		if (!autostash) {
-			if (get_can_ff(&orig_head, &merge_heads.oid[0])) {
-				/* we can fast-forward this without invoking rebase */
-				opt_ff = "--ff-only";
-				ran_ff = 1;
-				ret = run_merge();
-			}
+		if (get_can_ff(&orig_head, &merge_heads.oid[0])) {
+			/* we can fast-forward this without invoking rebase */
+			opt_ff = "--ff-only";
+			ran_ff = 1;
+			ret = run_merge();
 		}
 		if (!ran_ff)
 			ret = run_rebase(&newbase, &upstream);
-- 
2.29.2
Previous: Felipe ContrerasNext: Felipe Contreras
Message 5 of 21 in “pull: default ff-only mode”
  1. 00/19 pull: default ff-only modeFelipe Contreras, Dec 8, 2020
  2. 01/19 doc: pull: explain what is a fast-forwardFelipe Contreras, Dec 8, 2020
  3. 02/19 pull: improve default warningFelipe Contreras, Dec 8, 2020
  4. 03/19 pull: refactor fast-forward checkFelipe Contreras, Dec 8, 2020
  5. 04/19 pull: cleanup autostash checkFelipe Contreras, Dec 8, 2020
  6. 06/19 pull: move default warningFelipe Contreras, Dec 8, 2020
  7. 05/19 pull: trivial cleanupFelipe Contreras, Dec 8, 2020
  8. 07/19 pull: display default warning only when non-ffFelipe Contreras, Dec 8, 2020
  9. 08/19 pull: trivial whitespace style fixFelipe Contreras, Dec 8, 2020
  10. 09/19 pull: introduce --merge optionFelipe Contreras, Dec 8, 2020
  11. 10/19 pull: show warning with --ffFelipe Contreras, Dec 8, 2020
  12. 11/19 rebase: add REBASE_DEFAULTFelipe Contreras, Dec 8, 2020
  13. 12/19 pull: move configurations fetchesFelipe Contreras, Dec 8, 2020
  14. 14/19 test: pull-options: revert unnecessary changesFelipe Contreras, Dec 8, 2020
  15. 15/19 pull: trivial memory fixFelipe Contreras, Dec 8, 2020
  16. 13/19 test: merge-pull-config: trivial cleanupFelipe Contreras, Dec 8, 2020
  17. 17/19 pull: add pull.mode=ff-onlyFelipe Contreras, Dec 8, 2020
  18. 19/19 future: pull: enable ff-only mode by defaultFelipe Contreras, Dec 8, 2020
  19. 16/19 pull: add pull.modeFelipe Contreras, Dec 8, 2020
  20. 18/19 pull: advice of future changesFelipe Contreras, Dec 8, 2020
  21. Felipe ContrerasDec 8, 2020

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