submodule--helper: teach config subcommand --unset

diff --git a/builtin/submodule--helper.c b/builtin/submodule--helper.c
index 6881b6a9cb0fa1cd44118663cd8d7c8eaef1c95a..33d9f8266167432c5c62cbe6db869c1badf0486d 100644 (file)
--- a/builtin/submodule--helper.c
+++ b/builtin/submodule--helper.c
@@ -1,3 +1,4 @@
+#define USE_THE_INDEX_COMPATIBILITY_MACROS
 #include "builtin.h"
 #include "repository.h"
 #include "cache.h"
@@ -2056,7 +2057,7 @@ static int ensure_core_worktree(int argc, const char **argv, const char *prefix)
        if (!sub)
                BUG("We could get the submodule handle before?");
 
-       if (repo_submodule_init(&subrepo, the_repository, path))
+       if (repo_submodule_init(&subrepo, the_repository, sub))
                die(_("could not get a repository handle for submodule '%s'"), path);
 
        if (!repo_config_get_string(&subrepo, "core.worktree", &cw)) {
@@ -2147,17 +2148,22 @@ static int check_name(int argc, const char **argv, const char *prefix)
 static int module_config(int argc, const char **argv, const char *prefix)
 {
        enum {
-               CHECK_WRITEABLE = 1
+               CHECK_WRITEABLE = 1,
+               DO_UNSET = 2
        } command = 0;
 
        struct option module_config_options[] = {
                OPT_CMDMODE(0, "check-writeable", &command,
                            N_("check if it is safe to write to the .gitmodules file"),
                            CHECK_WRITEABLE),
+               OPT_CMDMODE(0, "unset", &command,
+                           N_("unset the config in the .gitmodules file"),
+                           DO_UNSET),
                OPT_END()
        };
        const char *const git_submodule_helper_usage[] = {
-               N_("git submodule--helper config name [value]"),
+               N_("git submodule--helper config <name> [<value>]"),
+               N_("git submodule--helper config --unset <name>"),
                N_("git submodule--helper config --check-writeable"),
                NULL
        };
@@ -2169,15 +2175,17 @@ static int module_config(int argc, const char **argv, const char *prefix)
                return is_writing_gitmodules_ok() ? 0 : -1;
 
        /* Equivalent to ACTION_GET in builtin/config.c */
-       if (argc == 2)
+       if (argc == 2 && command != DO_UNSET)
                return print_config_from_gitmodules(the_repository, argv[1]);
 
        /* Equivalent to ACTION_SET in builtin/config.c */
-       if (argc == 3) {
+       if (argc == 3 || (argc == 2 && command == DO_UNSET)) {
+               const char *value = (argc == 3) ? argv[2] : NULL;
+
                if (!is_writing_gitmodules_ok())
                        die(_("please make sure that the .gitmodules file is in the working tree"));
 
-               return config_set_in_gitmodules_file_gently(argv[1], argv[2]);
+               return config_set_in_gitmodules_file_gently(argv[1], value);
        }
 
        usage_with_options(git_submodule_helper_usage, module_config_options);