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[PATCH v4] diff-lib: honor override_submodule_config flag bit

From
Josip Sokcevic <sokcevic@google.com>
Date
Jun 14, 2023, 16:48 UTC
Message-ID
<20230614164856.3186012-2-sokcevic@google.com>

When `diff.ignoreSubmodules = all` is set and submodule commits are manually staged (e.g. via `git-update-index`), `git-commit` should record the commit with updated submodules.

`index_differs_from` is called from `prepare_to_commit` with flags set to `override_submodule_config = 1`. `index_differs_from` then merges the default diff flags and passed flags.

When `diff.ignoreSubmodules` is set to "all", `flags` ends up having both `override_submodule_config` and `ignore_submodules` set to 1. This results in `git-commit` ignoring staged commits.

This patch restores original `flags.ignore_submodule` if `flags.override_submodule_config` is set.

Signed-off-by: Josip Sokcevic <sokcevic@google.com>
---
 diff-lib.c                  |  9 ++++++++-
 t/t7406-submodule-update.sh | 23 +++++++++++++++++++++++
 2 files changed, 31 insertions(+), 1 deletion(-)
diff --git a/diff-lib.c b/diff-lib.c
index 60e979dc1b..1918517ebd 100644
--- a/diff-lib.c
+++ b/diff-lib.c
@@ -669,8 +669,15 @@ int index_differs_from(struct repository *r,
 	setup_revisions(0, NULL, &rev, &opt);
 	rev.diffopt.flags.quick = 1;
 	rev.diffopt.flags.exit_with_status = 1;
-	if (flags)
+	if (flags) {
 		diff_flags_or(&rev.diffopt.flags, flags);
+		/*
+		 * Now that flags are merged, honor override_submodule_config
+		 * and ignore_submodules from passed flags.
+		 */
+		if (flags->override_submodule_config)
+			rev.diffopt.flags.ignore_submodules = flags->ignore_submodules;
+	}
 	rev.diffopt.ita_invisible_in_index = ita_invisible_in_index;
 	run_diff_index(&rev, 1);
 	has_changes = rev.diffopt.flags.has_changes;
diff --git a/t/t7406-submodule-update.sh b/t/t7406-submodule-update.sh
index f094e3d7f3..00651c25cb 100755
--- a/t/t7406-submodule-update.sh
+++ b/t/t7406-submodule-update.sh
@@ -1179,4 +1179,27 @@ test_expect_success 'submodule update --recursive skip submodules with strategy=
 	test_cmp expect.err actual.err
 '
 
+add_submodule_commit_and_validate () {
+	HASH=$(git rev-parse HEAD) &&
+	git update-index --add --cacheinfo 160000,$HASH,sub &&
+	git commit -m "create submodule" &&
+	echo "160000 commit $HASH	sub" >expect &&
+	git ls-tree HEAD -- sub >actual &&
+	test_cmp expect actual
+}
+
+test_expect_success 'commit with staged submodule change' '
+	add_submodule_commit_and_validate
+'
+
+test_expect_success 'commit with staged submodule change with ignoreSubmodules dirty' '
+	test_config diff.ignoreSubmodules dirty &&
+	add_submodule_commit_and_validate
+'
+
+test_expect_success 'commit with staged submodule change with ignoreSubmodules all' '
+	test_config diff.ignoreSubmodules all &&
+	add_submodule_commit_and_validate
+'
+
 test_done
-- 
2.41.0.162.gfafddb0af9-goog
Next: Junio C Hamano
Message 1 of 2 in “diff-lib: honor override_submodule_config flag bit”
  1. diff-lib: honor override_submodule_config flag bitJosip Sokcevic, Jun 14, 2023
  2. Junio C HamanoJun 14, 2023

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