[PATCH v4 07/19] pull: display default warning only when non-ff

[Felipe Contreras <felipe.contreras@gmail.com>]

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

This requires the tests to pick another base, so the merge is not
fast-forward. And in the cases where --ff-only is specified add
test_must_fail (since now they are non-fast-forward).

Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com>
---
 Documentation/git-pull.txt   |  3 +++
 builtin/pull.c               |  2 +-
 t/t7601-merge-pull-config.sh | 28 +++++++++++++++++-----------
 3 files changed, 21 insertions(+), 12 deletions(-)

diff --git a/Documentation/git-pull.txt b/Documentation/git-pull.txt
index e1605a81b3..2fb184ab5f 100644
--- a/Documentation/git-pull.txt
+++ b/Documentation/git-pull.txt
@@ -60,6 +60,9 @@ However, a non-fast-forward case looks very different.
 	origin/master in your repository
 ------------
 
+By default `git pull` will warn about these situations, however, most likely
+you would want to force a merge, which you can do with `git pull --no-rebase`.
+
 Then "`git pull`" will fetch and replay the changes from the remote
 `master` branch since it diverged from the local `master` (i.e., `E`)
 until its current commit (`C`) on top of `master` and record the
diff --git a/builtin/pull.c b/builtin/pull.c
index 3b84ebf100..ab410d675f 100644
--- a/builtin/pull.c
+++ b/builtin/pull.c
@@ -1031,7 +1031,7 @@ int cmd_pull(int argc, const char **argv, const char *prefix)
 
 	can_ff = get_can_ff(&orig_head, &merge_heads.oid[0]);
 
-	if (default_mode && opt_verbosity >= 0 && !opt_ff) {
+	if (default_mode && !can_ff && opt_verbosity >= 0 && !opt_ff) {
 		advise(_("Pulling without specifying how to reconcile divergent branches is discouraged;\n"
 			"you need to specify if you want a merge, or a rebase.\n"
 			"You can squelch this message by running one of the following commands:\n"
diff --git a/t/t7601-merge-pull-config.sh b/t/t7601-merge-pull-config.sh
index 6774e9d86f..6b4adab8b1 100755
--- a/t/t7601-merge-pull-config.sh
+++ b/t/t7601-merge-pull-config.sh
@@ -28,7 +28,7 @@ test_expect_success 'setup' '
 '
 
 test_expect_success 'pull.rebase not set' '
-	git reset --hard c0 &&
+	git reset --hard c2 &&
 	git -c color.advice=always pull . c1 2>err &&
 	test_decode_color <err >decoded &&
 	test_i18ngrep "<YELLOW>hint: " decoded &&
@@ -36,54 +36,60 @@ test_expect_success 'pull.rebase not set' '
 
 '
 
-test_expect_success 'pull.rebase not set and pull.ff=true' '
+test_expect_success 'pull.rebase not set (fast-forward)' '
 	git reset --hard c0 &&
+	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' '
+	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' '
-	git reset --hard c0 &&
+	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' '
-	git reset --hard c0 &&
+	git reset --hard c2 &&
 	test_config pull.ff only &&
-	git pull . c1 2>err &&
+	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' '
-	git reset --hard c0 &&
+	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' '
-	git reset --hard c0 &&
+	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' '
-	git reset --hard c0 &&
+	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' '
-	git reset --hard c0 &&
+	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' '
-	git reset --hard c0 &&
-	git pull --ff-only . c1 2>err &&
+	git reset --hard c2 &&
+	test_must_fail git pull --ff-only . c1 2>err &&
 	test_i18ngrep ! "Pulling without specifying how to reconcile" err
 '
 
-- 
2.29.2