[PATCH v2 2/3] submodule--helper.c: add populated to foreach

["Guillaume Galeazzi via GitGitGadget" <gitgitgadget@xxxxxxxxx>]

From: Guillaume Galeazzi <guillaume.galeazzi@xxxxxxxxx>

On a repository with some submodules not initialised, one may need to
run a command only for not initilaised submodule or vice-versa. This
change, add the flag `--[no-]populated` to subcommand `foreach` of `git
submodule--helper`.

Signed-off-by: Guillaume Galeazzi <guillaume.galeazzi@xxxxxxxxx>
---
 builtin/submodule--helper.c  | 14 ++++++++------
 t/t7407-submodule-foreach.sh | 15 +++++++++++++++
 2 files changed, 23 insertions(+), 6 deletions(-)

diff --git a/builtin/submodule--helper.c b/builtin/submodule--helper.c
index 4b17e3b3b11..eb17e8c5293 100644
--- a/builtin/submodule--helper.c
+++ b/builtin/submodule--helper.c
@@ -451,11 +451,12 @@ struct foreach_cb {
 	int quiet;
 	int recursive;
 	int active_only;
+	int populated_only;
 };
 
 #define FOREACH_BOOL_FILTER_NOT_SET -1
 
-#define FOREACH_CB_INIT { .active_only=FOREACH_BOOL_FILTER_NOT_SET }
+#define FOREACH_CB_INIT { .active_only = FOREACH_BOOL_FILTER_NOT_SET, .populated_only = 1 }
 
 static void runcommand_in_submodule(const struct cache_entry *list_item,
 				    struct foreach_cb *info)
@@ -475,9 +476,6 @@ static void runcommand_in_submodule(const struct cache_entry *list_item,
 		die(_("No url found for submodule path '%s' in .gitmodules"),
 			displaypath);
 
-	if (!is_submodule_populated_gently(path, NULL))
-		goto cleanup;
-
 	prepare_submodule_repo_env(&cp.env_array);
 
 	/*
@@ -554,7 +552,6 @@ static void runcommand_in_submodule(const struct cache_entry *list_item,
 				displaypath);
 	}
 
-cleanup:
 	free(displaypath);
 }
 
@@ -571,6 +568,9 @@ static void runcommand_in_submodule_filtered_cb(const struct cache_entry *list_i
 			return;
 	}
 
+	if (info->populated_only != is_submodule_populated_gently(path, NULL))
+		return;
+
 	runcommand_in_submodule(list_item, info);
 }
 
@@ -586,11 +586,13 @@ static int module_foreach(int argc, const char **argv, const char *prefix)
 			 N_("Recurse into nested submodules")),
 		OPT_BOOL(0, "active", &info.active_only,
 			 N_("Call command depending on submodule active state")),
+		OPT_BOOL(0, "populated", &info.populated_only,
+			 N_("Call command depending on submodule populated state")),
 		OPT_END()
 	};
 
 	const char *const git_submodule_helper_usage[] = {
-		N_("git submodule--helper foreach [--quiet] [--recursive] [--[no-]active] [--] <command>"),
+		N_("git submodule--helper foreach [--quiet] [--recursive] [--[no-]active] [--[no-]populated] [--] <command>"),
 		NULL
 	};
 
diff --git a/t/t7407-submodule-foreach.sh b/t/t7407-submodule-foreach.sh
index 57c5ae70c8d..be6cd80d464 100755
--- a/t/t7407-submodule-foreach.sh
+++ b/t/t7407-submodule-foreach.sh
@@ -80,6 +80,21 @@ test_expect_success 'test basic "submodule foreach" usage' '
 	test_i18ncmp expect actual
 '
 
+sub2sha1=$(cd super/sub2 && git rev-parse HEAD)
+
+cat > expect <<EOF
+Entering 'sub2'
+$pwd/clone-foo2-sub2-$sub2sha1
+EOF
+
+test_expect_success 'test "submodule--helper foreach --no-populated" usage' '
+	(
+		cd clone &&
+		git submodule--helper foreach --no-populated "echo \$toplevel-\$name-\$path-\$sha1" > ../actual
+	) &&
+	test_i18ncmp expect actual
+'
+
 cat > expect <<EOF
 Entering 'sub3'
 $pwd/clone-foo3-sub3-$sub3sha1
-- 
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