[PATCH v2 0/3] submodule--helper.c: add only-active to foreach

["Guillaume G. via GitGitGadget" <gitgitgadget@gmail.com>]

On repository with multiple submodules, one may need to run a command based
on submodule trait.

This changes add flags to submodule--helper foreachto fulfill this need by:

Adding the flag --[no-]active to filter submodule based on the active state.
Adding the flag --[no-]populated to filter submodule based on the fact that
it is populated or not. Adding the flag -b|--branch <branch> to filter
submodule based on the tracking branch.

Signed-off-by: Guillaume Galeazzi guillaume.galeazzi@gmail.com
[guillaume.galeazzi@gmail.com]

Guillaume Galeazzi (3):
  submodule--helper.c: add active to foreach
  submodule--helper.c: add populated to foreach
  submodule--helper.c: add branch to foreach

 builtin/submodule--helper.c  | 60 ++++++++++++++++++++++++++++++------
 t/t7407-submodule-foreach.sh | 60 ++++++++++++++++++++++++++++++++++++
 2 files changed, 110 insertions(+), 10 deletions(-)


base-commit: b994622632154fc3b17fb40a38819ad954a5fb88
Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-631%2Fgzzi%2Fsubmodule-only-active-v2
Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-631/gzzi/submodule-only-active-v2
Pull-Request: https://github.com/gitgitgadget/git/pull/631

Range-diff vs v1:

 1:  77bb291af5d ! 1:  90defeb5a75 submodule--helper.c: add only-active to foreach
     @@ Metadata
      Author: Guillaume Galeazzi <guillaume.galeazzi@gmail.com>
      
       ## Commit message ##
     -    submodule--helper.c: add only-active to foreach
     -
     -    On repository with some submodule not active, it could be needed to run
     -    a command only for active submodule. Today it can be achived with the
     -    command:
     +    submodule--helper.c: add active to foreach
      
     +    On a repository with some submodules not active, one may need to run a
     +    command only for an active submodule or vice-versa. To achieve this,
     +    one may use:
          git submodule foreach 'git -C $toplevel submodule--helper is-active \
          $sm_path && pwd || :'
      
     -    Goal of this change is to make it more accessible by adding the flag
     -    --only-active to the submodule--helper command. Previous example
     -    become:
     -
     -    git submodule--helper foreach --only-active pwd
     +    Simplify this expression to make it more readable and easy-to-use by
     +    adding the flat `--[no-]active` to subcommand `foreach` of `git
     +    submodule`. Thus, simplifying the above command to:
     +    git submodule--helper foreach --active pwd
      
          Signed-off-by: Guillaume Galeazzi <guillaume.galeazzi@gmail.com>
      
     @@ builtin/submodule--helper.c: struct foreach_cb {
       	const char *prefix;
       	int quiet;
       	int recursive;
     -+	int only_active;
     ++	int active_only;
       };
     - #define FOREACH_CB_INIT { 0 }
     +-#define FOREACH_CB_INIT { 0 }
     + 
     +-static void runcommand_in_submodule_cb(const struct cache_entry *list_item,
     +-				       void *cb_data)
     ++#define FOREACH_BOOL_FILTER_NOT_SET -1
     ++
     ++#define FOREACH_CB_INIT { .active_only=FOREACH_BOOL_FILTER_NOT_SET }
     ++
     ++static void runcommand_in_submodule(const struct cache_entry *list_item,
     ++				    struct foreach_cb *info)
     + {
     +-	struct foreach_cb *info = cb_data;
     + 	const char *path = list_item->name;
     + 	const struct object_id *ce_oid = &list_item->oid;
       
      @@ builtin/submodule--helper.c: static void runcommand_in_submodule_cb(const struct cache_entry *list_item,
     - 	struct child_process cp = CHILD_PROCESS_INIT;
     - 	char *displaypath;
     + 	free(displaypath);
     + }
       
     -+	if (info->only_active && !is_submodule_active(the_repository, path))
     -+		return;
     ++static void runcommand_in_submodule_filtered_cb(const struct cache_entry *list_item,
     ++						void *cb_data)
     ++{
     ++	const char *path = list_item->name;
     ++	struct foreach_cb *info = cb_data;
     ++	int is_active;
      +
     - 	displaypath = get_submodule_displaypath(path, info->prefix);
     - 
     - 	sub = submodule_from_path(the_repository, &null_oid, path);
     ++	if (info->active_only != FOREACH_BOOL_FILTER_NOT_SET) {
     ++		is_active = is_submodule_active(the_repository, path);
     ++		if (is_active != info->active_only)
     ++			return;
     ++	}
     ++
     ++	runcommand_in_submodule(list_item, info);
     ++}
     ++
     + static int module_foreach(int argc, const char **argv, const char *prefix)
     + {
     + 	struct foreach_cb info = FOREACH_CB_INIT;
      @@ builtin/submodule--helper.c: static int module_foreach(int argc, const char **argv, const char *prefix)
       		OPT__QUIET(&info.quiet, N_("Suppress output of entering each submodule command")),
       		OPT_BOOL(0, "recursive", &info.recursive,
       			 N_("Recurse into nested submodules")),
     -+		OPT_BOOL(0, "only-active", &info.only_active,
     -+			 N_("Call command only for active submodules")),
     ++		OPT_BOOL(0, "active", &info.active_only,
     ++			 N_("Call command depending on submodule active state")),
       		OPT_END()
       	};
       
       	const char *const git_submodule_helper_usage[] = {
      -		N_("git submodule--helper foreach [--quiet] [--recursive] [--] <command>"),
     -+		N_("git submodule--helper foreach [--quiet] [--recursive] [--only-active] [--] <command>"),
     ++		N_("git submodule--helper foreach [--quiet] [--recursive] [--[no-]active] [--] <command>"),
       		NULL
       	};
       
     +@@ builtin/submodule--helper.c: static int module_foreach(int argc, const char **argv, const char *prefix)
     + 	info.argv = argv;
     + 	info.prefix = prefix;
     + 
     +-	for_each_listed_submodule(&list, runcommand_in_submodule_cb, &info);
     ++	for_each_listed_submodule(&list, runcommand_in_submodule_filtered_cb, &info);
     + 
     + 	return 0;
     + }
      
       ## t/t7407-submodule-foreach.sh ##
      @@ t/t7407-submodule-foreach.sh: test_expect_success 'test basic "submodule foreach" usage' '
       	test_i18ncmp expect actual
       '
       
     -+sub3sha1=$(cd super/sub3 && git rev-parse HEAD)
      +cat > expect <<EOF
      +Entering 'sub3'
      +$pwd/clone-foo3-sub3-$sub3sha1
      +EOF
      +
     -+test_expect_success 'test "submodule--helper foreach --only-active" usage' '
     ++test_expect_success 'test "submodule--helper foreach --active" usage' '
     ++	test_when_finished "git -C clone config --unset submodule.foo1.active" &&
     ++	(
     ++		cd clone &&
     ++		git config --bool submodule.foo1.active "false" &&
     ++		git submodule--helper foreach --active "echo \$toplevel-\$name-\$path-\$sha1" > ../actual
     ++	) &&
     ++	test_i18ncmp expect actual
     ++'
     ++
     ++cat > expect <<EOF
     ++Entering 'sub1'
     ++$pwd/clone-foo1-sub1-$sub1sha1
     ++EOF
     ++
     ++test_expect_success 'test "submodule--helper foreach --no-active" usage' '
      +	test_when_finished "git -C clone config --unset submodule.foo1.active" &&
      +	(
      +		cd clone &&
      +		git config --bool submodule.foo1.active "false" &&
     -+		git submodule--helper foreach --only-active "echo \$toplevel-\$name-\$path-\$sha1" > ../actual
     ++		git submodule--helper foreach --no-active "echo \$toplevel-\$name-\$path-\$sha1" > ../actual
      +	) &&
      +	test_i18ncmp expect actual
      +'
 -:  ----------- > 2:  f9cbdcdeacf submodule--helper.c: add populated to foreach
 -:  ----------- > 3:  65504cb780a submodule--helper.c: add branch to foreach

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