submodule--helper: add is-active subcommand

diff --git a/builtin/submodule--helper.c b/builtin/submodule--helper.c
index 15a5430c0028f45ff6265a821ff85aa9d8445230..5fe7e23b17cf1b62cec5aed6556730bf10eccc1b 100644 (file)
--- a/builtin/submodule--helper.c
+++ b/builtin/submodule--helper.c
@@ -1127,6 +1127,16 @@ static int absorb_git_dirs(int argc, const char **argv, const char *prefix)
        return 0;
 }
 
+static int is_active(int argc, const char **argv, const char *prefix)
+{
+       if (argc != 2)
+               die("submodule--helper is-active takes exactly 1 arguments");
+
+       gitmodules_config();
+
+       return !is_submodule_initialized(argv[1]);
+}
+
 #define SUPPORT_SUPER_PREFIX (1<<0)
 
 struct cmd_struct {
@@ -1146,6 +1156,7 @@ static struct cmd_struct commands[] = {
        {"init", module_init, SUPPORT_SUPER_PREFIX},
        {"remote-branch", resolve_remote_submodule_branch, 0},
        {"absorb-git-dirs", absorb_git_dirs, SUPPORT_SUPER_PREFIX},
+       {"is-active", is_active, 0},
 };
 
 int cmd_submodule__helper(int argc, const char **argv, const char *prefix)