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From: Alex Henrie <alexhenrie24@gmail.com>
To: git@vger.kernel.org, phillip.wood123@gmail.com, avarab@gmail.com,
	gitster@pobox.com, felipe.contreras@gmail.com, newren@gmail.com
Cc: Alex Henrie <alexhenrie24@gmail.com>
Subject: [PATCH] pull: abort if --ff-only is given and fast-forwarding is impossible
Date: Sat, 10 Jul 2021 19:26:04 -0600	[thread overview]
Message-ID: <20210711012604.947321-1-alexhenrie24@gmail.com> (raw)

The warning about pulling without specifying how to reconcile divergent
branches says that after setting pull.rebase to true, --ff-only can
still be passed on the command line to require a fast-forward. Make that
actually work.

Signed-off-by: Alex Henrie <alexhenrie24@gmail.com>
---
 advice.c                     |  5 +++++
 advice.h                     |  1 +
 builtin/merge.c              |  2 +-
 builtin/pull.c               | 11 ++++++++---
 t/t7601-merge-pull-config.sh | 24 ++++++++++++++++++++++++
 5 files changed, 39 insertions(+), 4 deletions(-)

diff --git a/advice.c b/advice.c
index 0b9c89c48a..337e8f342b 100644
--- a/advice.c
+++ b/advice.c
@@ -286,6 +286,11 @@ void NORETURN die_conclude_merge(void)
 	die(_("Exiting because of unfinished merge."));
 }
 
+void NORETURN die_ff_impossible(void)
+{
+	die(_("Not possible to fast-forward, aborting."));
+}
+
 void advise_on_updating_sparse_paths(struct string_list *pathspec_list)
 {
 	struct string_list_item *item;
diff --git a/advice.h b/advice.h
index bd26c385d0..1624043838 100644
--- a/advice.h
+++ b/advice.h
@@ -95,6 +95,7 @@ void advise_if_enabled(enum advice_type type, const char *advice, ...);
 int error_resolve_conflict(const char *me);
 void NORETURN die_resolve_conflict(const char *me);
 void NORETURN die_conclude_merge(void);
+void NORETURN die_ff_impossible(void);
 void advise_on_updating_sparse_paths(struct string_list *pathspec_list);
 void detach_advice(const char *new_name);
 
diff --git a/builtin/merge.c b/builtin/merge.c
index a8a843b1f5..aa920ac524 100644
--- a/builtin/merge.c
+++ b/builtin/merge.c
@@ -1620,7 +1620,7 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
 	}
 
 	if (fast_forward == FF_ONLY)
-		die(_("Not possible to fast-forward, aborting."));
+		die_ff_impossible();
 
 	if (autostash)
 		create_autostash(the_repository,
diff --git a/builtin/pull.c b/builtin/pull.c
index 3e13f81084..d979660482 100644
--- a/builtin/pull.c
+++ b/builtin/pull.c
@@ -1046,9 +1046,14 @@ int cmd_pull(int argc, const char **argv, const char *prefix)
 
 	can_ff = get_can_ff(&orig_head, &merge_heads.oid[0]);
 
-	if (rebase_unspecified && !opt_ff && !can_ff) {
-		if (opt_verbosity >= 0)
-			show_advice_pull_non_ff();
+	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();
+		}
 	}
 
 	if (opt_rebase) {
diff --git a/t/t7601-merge-pull-config.sh b/t/t7601-merge-pull-config.sh
index 52e8ccc933..b5a09a60f9 100755
--- a/t/t7601-merge-pull-config.sh
+++ b/t/t7601-merge-pull-config.sh
@@ -183,6 +183,30 @@ test_expect_success 'pull prevents non-fast-forward with "only" in pull.ff' '
 	test_must_fail git pull . c3
 '
 
+test_expect_success 'pull prevents non-fast-forward with pull.ff=only and pull.rebase=true' '
+	git reset --hard c1 &&
+	test_config pull.ff only &&
+	test_config pull.rebase true &&
+	test_must_fail git pull . c3
+'
+
+test_expect_success 'pull prevents non-fast-forward with pull.ff=only and pull.rebase=false' '
+	git reset --hard c1 &&
+	test_config pull.ff only &&
+	test_config pull.rebase false &&
+	test_must_fail git pull . c3
+'
+
+test_expect_success 'pull prevents non-fast-forward with --rebase --ff-only' '
+	git reset --hard c1 &&
+	test_must_fail git pull --rebase --ff-only . c3
+'
+
+test_expect_success 'pull prevents non-fast-forward with --no-rebase --ff-only' '
+	git reset --hard c1 &&
+	test_must_fail git pull --no-rebase --ff-only . c3
+'
+
 test_expect_success 'merge c1 with c2 (ours in pull.twohead)' '
 	git reset --hard c1 &&
 	git config pull.twohead ours &&
-- 
2.32.0.171.gfa4a44ff46


             reply	other threads:[~2021-07-11  1:28 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-11  1:26 Alex Henrie [this message]
2021-07-11 17:08 ` Felipe Contreras
2021-07-11 20:00   ` Alex Henrie
2021-07-11 21:41     ` Felipe Contreras
2021-07-12 10:21 ` Phillip Wood
2021-07-12 16:04   ` Felipe Contreras
2021-07-12 16:29   ` Alex Henrie
2021-07-12 17:43     ` Felipe Contreras
2021-07-12 17:08   ` Junio C Hamano
2021-07-12 17:30     ` Felipe Contreras
2021-07-12 17:50     ` Elijah Newren
2021-07-12 18:20       ` Felipe Contreras
2021-07-12 18:20       ` Alex Henrie
2021-07-12 18:24         ` Alex Henrie
2021-07-12 19:55           ` Junio C Hamano
2021-07-12 20:19             ` Felipe Contreras
2021-07-12 20:51             ` Elijah Newren
2021-07-12 23:00               ` Junio C Hamano
2021-07-12 23:05                 ` Felipe Contreras
2021-07-12 23:24                 ` Elijah Newren
2021-07-12 20:37         ` Elijah Newren
2021-07-12 21:06           ` Felipe Contreras
2021-07-12 17:54     ` Phillip Wood
2021-07-14  8:37 ` Son Luong Ngoc
2021-07-14 15:14   ` Felipe Contreras
2021-07-14 15:22   ` Elijah Newren
2021-07-14 17:19     ` Junio C Hamano
2021-07-14 17:31     ` Felipe Contreras

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