[v7,5/5] pull: display default warning only when non-ff

Commit Message

Junio C Hamano Dec. 14, 2020, 8:26 p.m. UTC

From: Felipe Contreras <[e-mail]>

There's no need to display the annoying warning on every pull... only
the ones that are not fast-forward.

The current warning tests still pass, but not because of the arguments
or the configuration, but because they are all fast-forward.

We need to test non-fast-forward situations now.

Suggestions-by: Junio C Hamano <[e-mail]>
Signed-off-by: Felipe Contreras <[e-mail]>
Signed-off-by: Junio C Hamano <[e-mail]>
---
 builtin/pull.c               |  7 ++--
 t/t7601-merge-pull-config.sh | 66 +++++++++++++++++++++++++++++++++---
 2 files changed, 66 insertions(+), 7 deletions(-)

Comments

Felipe Contreras Dec. 14, 2020, 9:24 p.m. UTC | #1

Junio C Hamano wrote:
> @@ -1044,7 +1045,9 @@ int cmd_pull(int argc, const char **argv, const char *prefix)
>  	if (opt_rebase && merge_heads.nr > 1)
>  		die(_("Cannot rebase onto multiple branches."));
>  
> -	if (rebase_unspecified && !opt_ff) {
> +	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();
>  	}

I strongly predict the conditionals will end up looking similar to:

  if (!can_ff) {
          if (rebase_unspecified && !opt_ff && opt_verbosity >= 0)
                  show_advice_pull_non_ff();
  }

But OK.

Junio C Hamano Dec. 14, 2020, 11:20 p.m. UTC | #2

Felipe Contreras <[e-mail]> writes:

> Junio C Hamano wrote:
>> @@ -1044,7 +1045,9 @@ int cmd_pull(int argc, const char **argv, const char *prefix)
>>  	if (opt_rebase && merge_heads.nr > 1)
>>  		die(_("Cannot rebase onto multiple branches."));
>>  
>> -	if (rebase_unspecified && !opt_ff) {
>> +	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();
>>  	}
>
> I strongly predict the conditionals will end up looking similar to:
>
>   if (!can_ff) {
>           if (rebase_unspecified && !opt_ff && opt_verbosity >= 0)
>                   show_advice_pull_non_ff();
>   }
>
> But OK.

I may have failed to mention this in the cover letter, but I think
the placement of opt_ff in this part of the logic needs to be
rethought, so I strongly predict that this part will have to further
change ;-)

Felipe Contreras Dec. 15, 2020, 2:57 a.m. UTC | #3

Junio C Hamano wrote:
> Felipe Contreras <[e-mail]> writes:
> > Junio C Hamano wrote:

> > I strongly predict the conditionals will end up looking similar to:
> >
> >   if (!can_ff) {
> >           if (rebase_unspecified && !opt_ff && opt_verbosity >= 0)
> >                   show_advice_pull_non_ff();
> >   }
> >
> > But OK.
> 
> I may have failed to mention this in the cover letter, but I think
> the placement of opt_ff in this part of the logic needs to be
> rethought, so I strongly predict that this part will have to further
> change ;-)

And precisely because I predicted the same is that I deliberately chose
not to preemptively organize the conditionals in any particular way.

Cheers.

Patch

diff --git a/builtin/pull.c b/builtin/pull.c
index 1b87ea95eb..e8927fc2ff 100644
--- a/builtin/pull.c
+++ b/builtin/pull.c
@@ -949,6 +949,7 @@  int cmd_pull(int argc, const char **argv, const char *prefix)
 	struct object_id rebase_fork_point;
 	int autostash;
 	int rebase_unspecified = 0;
+	int can_ff;
 
 	if (!getenv("GIT_REFLOG_ACTION"))
 		set_reflog_message(argc, argv);
@@ -1044,7 +1045,9 @@  int cmd_pull(int argc, const char **argv, const char *prefix)
 	if (opt_rebase && merge_heads.nr > 1)
 		die(_("Cannot rebase onto multiple branches."));
 
-	if (rebase_unspecified && !opt_ff) {
+	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();
 	}
@@ -1063,7 +1066,7 @@  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 (!autostash) {
-			if (get_can_ff(&orig_head, &merge_heads.oid[0])) {
+			if (can_ff) {
 				/* we can fast-forward this without invoking rebase */
 				opt_ff = "--ff-only";
 				ran_ff = 1;
diff --git a/t/t7601-merge-pull-config.sh b/t/t7601-merge-pull-config.sh
index 6774e9d86f..52e8ccc933 100755
--- a/t/t7601-merge-pull-config.sh
+++ b/t/t7601-merge-pull-config.sh
@@ -29,11 +29,8 @@  test_expect_success 'setup' '
 
 test_expect_success 'pull.rebase not set' '
 	git reset --hard c0 &&
-	git -c color.advice=always pull . c1 2>err &&
-	test_decode_color <err >decoded &&
-	test_i18ngrep "<YELLOW>hint: " decoded &&
-	test_i18ngrep "Pulling without specifying how to reconcile" decoded
-
+	git pull . c1 2>err &&
+	test_i18ngrep ! "Pulling without specifying how to reconcile" err
 '
 
 test_expect_success 'pull.rebase not set and pull.ff=true' '
@@ -87,6 +84,65 @@  test_expect_success 'pull.rebase not set and --ff-only given' '
 	test_i18ngrep ! "Pulling without specifying how to reconcile" err
 '
 
+test_expect_success 'pull.rebase not set (not-fast-forward)' '
+	git reset --hard c2 &&
+	git -c color.advice=always pull . c1 2>err &&
+	test_decode_color <err >decoded &&
+	test_i18ngrep "<YELLOW>hint: " decoded &&
+	test_i18ngrep "Pulling without specifying how to reconcile" decoded
+'
+
+test_expect_success 'pull.rebase not set and pull.ff=true (not-fast-forward)' '
+	git reset --hard c2 &&
+	test_config pull.ff true &&
+	git pull . c1 2>err &&
+	test_i18ngrep ! "Pulling without specifying how to reconcile" err
+'
+
+test_expect_success 'pull.rebase not set and pull.ff=false (not-fast-forward)' '
+	git reset --hard c2 &&
+	test_config pull.ff false &&
+	git pull . c1 2>err &&
+	test_i18ngrep ! "Pulling without specifying how to reconcile" err
+'
+
+test_expect_success 'pull.rebase not set and pull.ff=only (not-fast-forward)' '
+	git reset --hard c2 &&
+	test_config pull.ff only &&
+	test_must_fail git pull . c1 2>err &&
+	test_i18ngrep ! "Pulling without specifying how to reconcile" err
+'
+
+test_expect_success 'pull.rebase not set and --rebase given (not-fast-forward)' '
+	git reset --hard c2 &&
+	git pull --rebase . c1 2>err &&
+	test_i18ngrep ! "Pulling without specifying how to reconcile" err
+'
+
+test_expect_success 'pull.rebase not set and --no-rebase given (not-fast-forward)' '
+	git reset --hard c2 &&
+	git pull --no-rebase . c1 2>err &&
+	test_i18ngrep ! "Pulling without specifying how to reconcile" err
+'
+
+test_expect_success 'pull.rebase not set and --ff given (not-fast-forward)' '
+	git reset --hard c2 &&
+	git pull --ff . c1 2>err &&
+	test_i18ngrep ! "Pulling without specifying how to reconcile" err
+'
+
+test_expect_success 'pull.rebase not set and --no-ff given (not-fast-forward)' '
+	git reset --hard c2 &&
+	git pull --no-ff . c1 2>err &&
+	test_i18ngrep ! "Pulling without specifying how to reconcile" err
+'
+
+test_expect_success 'pull.rebase not set and --ff-only given (not-fast-forward)' '
+	git reset --hard c2 &&
+	test_must_fail git pull --ff-only . c1 2>err &&
+	test_i18ngrep ! "Pulling without specifying how to reconcile" err
+'
+
 test_expect_success 'merge c1 with c2' '
 	git reset --hard c1 &&
 	test -f c0.c &&