[PATCH 00/13] submodule: convert the rest of 'update' to C

@@ -606,18 +606,22 @@ static int module_foreach(int argc, const char **argv, const char *prefix)
 
 struct init_cb {
 	const char *prefix;
+	const char *superprefix;
 	unsigned int flags;
 };
 #define INIT_CB_INIT { 0 }
 
 static void init_submodule(const char *path, const char *prefix,
-			   unsigned int flags)
+			   const char *superprefix, unsigned int flags)
 {
 	const struct submodule *sub;
 	struct strbuf sb = STRBUF_INIT;
 	char *upd = NULL, *url = NULL, *displaypath;
 
-	displaypath = get_submodule_displaypath(path, prefix);
+	/* try superprefix from the environment, if it is not passed explicitly */
+	if (!superprefix)
+		superprefix = get_super_prefix();
+	displaypath = do_get_submodule_displaypath(path, prefix, superprefix);
 
 	sub = submodule_from_path(the_repository, null_oid(), path);
 

@@ -691,7 +695,7 @@ static void init_submodule(const char *path, const char *prefix,
 static void init_submodule_cb(const struct cache_entry *list_item, void *cb_data)
 {
 	struct init_cb *info = cb_data;
-	init_submodule(list_item->name, info->prefix, info->flags);
+	init_submodule(list_item->name, info->prefix, info->superprefix, info->flags);
 }
 
 static int module_init(int argc, const char **argv, const char *prefix)

@@ -1654,7 +1654,10 @@ struct module_clone_data {
 	unsigned int require_init: 1;
 	int single_branch;
 };
-#define MODULE_CLONE_DATA_INIT { .reference = STRING_LIST_INIT_NODUP, .single_branch = -1 }
+#define MODULE_CLONE_DATA_INIT { \
+	.reference = STRING_LIST_INIT_NODUP, \
+	.single_branch = -1, \
+}
 
 struct submodule_alternate_setup {
 	const char *submodule_name;

@@ -2047,7 +2050,9 @@ struct update_data {
 	unsigned int nofetch: 1;
 	unsigned int just_cloned: 1;
 };
-#define UPDATE_DATA_INIT { .update_strategy = SUBMODULE_UPDATE_STRATEGY_INIT }
+#define UPDATE_DATA_INIT { \
+	.update_strategy = SUBMODULE_UPDATE_STRATEGY_INIT, \
+}
 
 static void next_submodule_warn_missing(struct submodule_update_clone *suc,
 		struct strbuf *out, const char *displaypath)

@@ -3013,7 +3018,9 @@ struct add_data {
 	unsigned int progress: 1;
 	unsigned int dissociate: 1;
 };
-#define ADD_DATA_INIT { .depth = -1 }
+#define ADD_DATA_INIT { \
+	.depth = -1, \
+}
 
 static void append_fetch_remotes(struct strbuf *msg, const char *git_dir_path)
 {

@@ -2045,10 +2045,10 @@ struct update_data {
 	struct object_id suboid;
 	struct submodule_update_strategy update_strategy;
 	int depth;
-	unsigned int force: 1;
-	unsigned int quiet: 1;
-	unsigned int nofetch: 1;
-	unsigned int just_cloned: 1;
+	unsigned int force;
+	unsigned int quiet;
+	unsigned int nofetch;
+	unsigned int just_cloned;
 };
 #define UPDATE_DATA_INIT { \
 	.update_strategy = SUBMODULE_UPDATE_STRATEGY_INIT, \

@@ -2578,16 +2578,17 @@ static int update_clone(int argc, const char **argv, const char *prefix)
 
 static int run_update_procedure(int argc, const char **argv, const char *prefix)
 {
-	int force = 0, quiet = 0, nofetch = 0, just_cloned = 0;
 	char *prefixed_path, *update = NULL;
 	struct update_data opt = UPDATE_DATA_INIT;
 
 	struct option options[] = {
-		OPT__QUIET(&quiet, N_("suppress output for update by rebase or merge")),
-		OPT__FORCE(&force, N_("force checkout updates"), 0),
-		OPT_BOOL('N', "no-fetch", &nofetch,
+		OPT__QUIET(&opt.quiet,
+			   N_("suppress output for update by rebase or merge")),
+		OPT__FORCE(&opt.force, N_("force checkout updates"),
+			   0),
+		OPT_BOOL('N', "no-fetch", &opt.nofetch,
 			 N_("don't fetch new objects from the remote site")),
-		OPT_BOOL(0, "just-cloned", &just_cloned,
+		OPT_BOOL(0, "just-cloned", &opt.just_cloned,
 			 N_("overrides update mode in case the repository is a fresh clone")),
 		OPT_INTEGER(0, "depth", &opt.depth, N_("depth for shallow fetch")),
 		OPT_STRING(0, "prefix", &prefix,

@@ -2618,10 +2619,6 @@ static int run_update_procedure(int argc, const char **argv, const char *prefix)
 	if (argc != 1)
 		usage_with_options(usage, options);
 
-	opt.force = !!force;
-	opt.quiet = !!quiet;
-	opt.nofetch = !!nofetch;
-	opt.just_cloned = !!just_cloned;
 	opt.sm_path = argv[0];
 
 	if (opt.recursive_prefix)

@@ -205,8 +205,18 @@ test_expect_success 'submodule update should fail due to local changes' '
 	 (cd submodule &&
 	  compare_head
 	 ) &&
-	 test_must_fail git submodule update submodule
-	)
+	 test_must_fail git submodule update submodule 2>../actual.raw
+	) &&
+	sed "s/^> //" >expect <<-\EOF &&
+	> error: Your local changes to the following files would be overwritten by checkout:
+	> 	file
+	> Please commit your changes or stash them before you switch branches.
+	> Aborting
+	> fatal: Unable to checkout OID in submodule path '\''submodule'\''
+	EOF
+	sed -e "s/checkout $SQ[^$SQ]*$SQ/checkout OID/" <actual.raw >actual &&
+	test_cmp expect actual
+
 '
 test_expect_success 'submodule update should throw away changes with --force ' '
 	(cd super &&

@@ -193,7 +193,19 @@ test_expect_success 'missing nested submodule alternate fails clone and submodul
 		cd supersuper-clone &&
 		check_that_two_of_three_alternates_are_used &&
 		# update of the submodule fails
-		test_must_fail git submodule update --init --recursive
+		cat >expect <<-\EOF &&
+		fatal: submodule '\''sub'\'' cannot add alternate: path ... does not exist
+		Failed to clone '\''sub'\''. Retry scheduled
+		fatal: submodule '\''sub-dissociate'\'' cannot add alternate: path ... does not exist
+		Failed to clone '\''sub-dissociate'\''. Retry scheduled
+		fatal: submodule '\''sub'\'' cannot add alternate: path ... does not exist
+		Failed to clone '\''sub'\'' a second time, aborting
+		fatal: Failed to recurse into submodule path ...
+		EOF
+		test_must_fail git submodule update --init --recursive 2>err &&
+		grep -e fatal: -e ^Failed err >actual.raw &&
+		sed -e "s/path $SQ[^$SQ]*$SQ/path .../" <actual.raw >actual &&
+		test_cmp expect actual
 	)
 '
 

@@ -1965,29 +1965,6 @@ static void determine_submodule_update_strategy(struct repository *r,
 	free(key);
 }
 
-static int module_update_module_mode(int argc, const char **argv, const char *prefix)
-{
-	const char *path, *update = NULL;
-	int just_cloned;
-	struct submodule_update_strategy update_strategy = { .type = SM_UPDATE_CHECKOUT };
-
-	if (argc < 3 || argc > 4)
-		die("submodule--helper update-module-clone expects <just-cloned> <path> [<update>]");
-
-	just_cloned = git_config_int("just_cloned", argv[1]);
-	path = argv[2];
-
-	if (argc == 4)
-		update = argv[3];
-
-	determine_submodule_update_strategy(the_repository,
-					    just_cloned, path, update,
-					    &update_strategy);
-	fputs(submodule_strategy_to_string(&update_strategy), stdout);
-
-	return 0;
-}
-
 struct update_clone_data {
 	const struct submodule *sub;
 	struct object_id oid;

@@ -3388,7 +3365,6 @@ static struct cmd_struct commands[] = {
 	{"name", module_name, 0},
 	{"clone", module_clone, 0},
 	{"add", module_add, SUPPORT_SUPER_PREFIX},
-	{"update-module-mode", module_update_module_mode, 0},
 	{"update-clone", update_clone, 0},
 	{"run-update-procedure", run_update_procedure, 0},
 	{"ensure-core-worktree", ensure_core_worktree, 0},

@@ -2517,36 +2517,36 @@ static int update_clone(int argc, const char **argv, const char *prefix)
 {
 	const char *update = NULL;
 	struct pathspec pathspec;
-	struct submodule_update_clone suc = SUBMODULE_UPDATE_CLONE_INIT;
+	struct submodule_update_clone opt = SUBMODULE_UPDATE_CLONE_INIT;
 
 	struct option module_update_clone_options[] = {
 		OPT_STRING(0, "prefix", &prefix,
 			   N_("path"),
 			   N_("path into the working tree")),
-		OPT_STRING(0, "recursive-prefix", &suc.recursive_prefix,
+		OPT_STRING(0, "recursive-prefix", &opt.recursive_prefix,
 			   N_("path"),
 			   N_("path into the working tree, across nested "
 			      "submodule boundaries")),
 		OPT_STRING(0, "update", &update,
 			   N_("string"),
 			   N_("rebase, merge, checkout or none")),
-		OPT_STRING_LIST(0, "reference", &suc.references, N_("repo"),
+		OPT_STRING_LIST(0, "reference", &opt.references, N_("repo"),
 			   N_("reference repository")),
-		OPT_BOOL(0, "dissociate", &suc.dissociate,
+		OPT_BOOL(0, "dissociate", &opt.dissociate,
 			   N_("use --reference only while cloning")),
-		OPT_STRING(0, "depth", &suc.depth, "<depth>",
+		OPT_STRING(0, "depth", &opt.depth, "<depth>",
 			   N_("create a shallow clone truncated to the "
 			      "specified number of revisions")),
-		OPT_INTEGER('j', "jobs", &suc.max_jobs,
+		OPT_INTEGER('j', "jobs", &opt.max_jobs,
 			    N_("parallel jobs")),
-		OPT_BOOL(0, "recommend-shallow", &suc.recommend_shallow,
+		OPT_BOOL(0, "recommend-shallow", &opt.recommend_shallow,
 			    N_("whether the initial clone should follow the shallow recommendation")),
-		OPT__QUIET(&suc.quiet, N_("don't print cloning progress")),
-		OPT_BOOL(0, "progress", &suc.progress,
+		OPT__QUIET(&opt.quiet, N_("don't print cloning progress")),
+		OPT_BOOL(0, "progress", &opt.progress,
 			    N_("force cloning progress")),
-		OPT_BOOL(0, "require-init", &suc.require_init,
+		OPT_BOOL(0, "require-init", &opt.require_init,
 			   N_("disallow cloning into non-empty directory")),
-		OPT_BOOL(0, "single-branch", &suc.single_branch,
+		OPT_BOOL(0, "single-branch", &opt.single_branch,
 			 N_("clone only one branch, HEAD or --branch")),
 		OPT_END()
 	};

@@ -2555,32 +2555,32 @@ static int update_clone(int argc, const char **argv, const char *prefix)
 		N_("git submodule--helper update-clone [--prefix=<path>] [<path>...]"),
 		NULL
 	};
-	suc.prefix = prefix;
+	opt.prefix = prefix;
 
-	update_clone_config_from_gitmodules(&suc.max_jobs);
-	git_config(git_update_clone_config, &suc.max_jobs);
+	update_clone_config_from_gitmodules(&opt.max_jobs);
+	git_config(git_update_clone_config, &opt.max_jobs);
 
 	argc = parse_options(argc, argv, prefix, module_update_clone_options,
 			     git_submodule_helper_usage, 0);
 
 	if (update)
-		if (parse_submodule_update_strategy(update, &suc.update) < 0)
+		if (parse_submodule_update_strategy(update, &opt.update) < 0)
 			die(_("bad value for update parameter"));
 
-	if (module_list_compute(argc, argv, prefix, &pathspec, &suc.list) < 0)
+	if (module_list_compute(argc, argv, prefix, &pathspec, &opt.list) < 0)
 		return 1;
 
 	if (pathspec.nr)
-		suc.warn_if_uninitialized = 1;
+		opt.warn_if_uninitialized = 1;
 
-	return update_submodules(&suc);
+	return update_submodules(&opt);
 }
 
 static int run_update_procedure(int argc, const char **argv, const char *prefix)
 {
 	int force = 0, quiet = 0, nofetch = 0, just_cloned = 0;
 	char *prefixed_path, *update = NULL;
-	struct update_data update_data = UPDATE_DATA_INIT;
+	struct update_data opt = UPDATE_DATA_INIT;
 
 	struct option options[] = {
 		OPT__QUIET(&quiet, N_("suppress output for update by rebase or merge")),

@@ -2589,20 +2589,20 @@ static int run_update_procedure(int argc, const char **argv, const char *prefix)
 			 N_("don't fetch new objects from the remote site")),
 		OPT_BOOL(0, "just-cloned", &just_cloned,
 			 N_("overrides update mode in case the repository is a fresh clone")),
-		OPT_INTEGER(0, "depth", &update_data.depth, N_("depth for shallow fetch")),
+		OPT_INTEGER(0, "depth", &opt.depth, N_("depth for shallow fetch")),
 		OPT_STRING(0, "prefix", &prefix,
 			   N_("path"),
 			   N_("path into the working tree")),
 		OPT_STRING(0, "update", &update,
 			   N_("string"),
 			   N_("rebase, merge, checkout or none")),
-		OPT_STRING(0, "recursive-prefix", &update_data.recursive_prefix, N_("path"),
+		OPT_STRING(0, "recursive-prefix", &opt.recursive_prefix, N_("path"),
 			   N_("path into the working tree, across nested "
 			      "submodule boundaries")),
-		OPT_CALLBACK_F(0, "oid", &update_data.oid, N_("sha1"),
+		OPT_CALLBACK_F(0, "oid", &opt.oid, N_("sha1"),
 			       N_("SHA1 expected by superproject"), PARSE_OPT_NONEG,
 			       parse_opt_object_id),
-		OPT_CALLBACK_F(0, "suboid", &update_data.suboid, N_("subsha1"),
+		OPT_CALLBACK_F(0, "suboid", &opt.suboid, N_("subsha1"),
 			       N_("SHA1 of submodule's HEAD"), PARSE_OPT_NONEG,
 			       parse_opt_object_id),
 		OPT_END()

@@ -2618,27 +2618,27 @@ static int run_update_procedure(int argc, const char **argv, const char *prefix)
 	if (argc != 1)
 		usage_with_options(usage, options);
 
-	update_data.force = !!force;
-	update_data.quiet = !!quiet;
-	update_data.nofetch = !!nofetch;
-	update_data.just_cloned = !!just_cloned;
-	update_data.sm_path = argv[0];
+	opt.force = !!force;
+	opt.quiet = !!quiet;
+	opt.nofetch = !!nofetch;
+	opt.just_cloned = !!just_cloned;
+	opt.sm_path = argv[0];
 
-	if (update_data.recursive_prefix)
-		prefixed_path = xstrfmt("%s%s", update_data.recursive_prefix, update_data.sm_path);
+	if (opt.recursive_prefix)
+		prefixed_path = xstrfmt("%s%s", opt.recursive_prefix, opt.sm_path);
 	else
-		prefixed_path = xstrdup(update_data.sm_path);
+		prefixed_path = xstrdup(opt.sm_path);
 
-	update_data.displaypath = get_submodule_displaypath(prefixed_path, prefix);
+	opt.displaypath = get_submodule_displaypath(prefixed_path, prefix);
 
-	determine_submodule_update_strategy(the_repository, update_data.just_cloned,
-					    update_data.sm_path, update,
-					    &update_data.update_strategy);
+	determine_submodule_update_strategy(the_repository, opt.just_cloned,
+					    opt.sm_path, update,
+					    &opt.update_strategy);
 
 	free(prefixed_path);
 
-	if (!oideq(&update_data.oid, &update_data.suboid) || update_data.force)
-		return do_run_update_procedure(&update_data);
+	if (!oideq(&opt.oid, &opt.suboid) || opt.force)
+		return do_run_update_procedure(&opt);
 
 	return 3;
 }

@@ -2553,6 +2553,11 @@ static int update_clone(int argc, const char **argv, const char *prefix)
 	return update_submodules(&opt);
 }
 
+/*
+ * NEEDSWORK: Use a forward declaration to avoid moving
+ * run_update_procedure() (which will be removed soon).
+ */
+static int update_submodule2(struct update_data *update_data);
 static int run_update_procedure(int argc, const char **argv, const char *prefix)
 {
 	char *prefixed_path, *update = NULL;

@@ -2610,11 +2615,7 @@ static int run_update_procedure(int argc, const char **argv, const char *prefix)
 					    &opt.update_strategy);
 
 	free(prefixed_path);
-
-	if (!oideq(&opt.oid, &opt.suboid) || opt.force)
-		return do_run_update_procedure(&opt);
-
-	return 3;
+	return update_submodule2(&opt);
 }
 
 static int resolve_relative_path(int argc, const char **argv, const char *prefix)

@@ -2978,6 +2979,15 @@ static int module_set_branch(int argc, const char **argv, const char *prefix)
 	return !!ret;
 }
 
+/* NEEDSWORK: this is a temporary name until we delete update_submodule() */
+static int update_submodule2(struct update_data *update_data)
+{
+	if (!oideq(&update_data->oid, &update_data->suboid) || update_data->force)
+		return do_run_update_procedure(update_data);
+
+	return 3;
+}
+
 struct add_data {
 	const char *prefix;
 	const char *branch;

@@ -71,21 +71,6 @@ static char *get_default_remote(void)
 	return repo_get_default_remote(the_repository);
 }
 
-static int print_default_remote(int argc, const char **argv, const char *prefix)
-{
-	char *remote;
-
-	if (argc != 1)
-		die(_("submodule--helper print-default-remote takes no arguments"));
-
-	remote = get_default_remote();
-	if (remote)
-		printf("%s\n", remote);
-
-	free(remote);
-	return 0;
-}
-
 static int starts_with_dot_slash(const char *str)
 {
 	return str[0] == '.' && is_dir_sep(str[1]);

@@ -2026,6 +2011,7 @@ struct update_data {
 	unsigned int quiet;
 	unsigned int nofetch;
 	unsigned int just_cloned;
+	unsigned int remote;
 };
 #define UPDATE_DATA_INIT { \
 	.update_strategy = SUBMODULE_UPDATE_STRATEGY_INIT, \

@@ -2585,6 +2571,8 @@ static int run_update_procedure(int argc, const char **argv, const char *prefix)
 		OPT_CALLBACK_F(0, "oid", &opt.oid, N_("sha1"),
 			       N_("SHA1 expected by superproject"), PARSE_OPT_NONEG,
 			       parse_opt_object_id),
+		OPT_BOOL(0, "remote", &opt.remote,
+			 N_("use SHA-1 of submodule's remote tracking branch")),
 		OPT_END()
 	};
 

@@ -2988,6 +2976,25 @@ static int update_submodule2(struct update_data *update_data)
 			    update_data->displaypath);
 	}
 
+	if (update_data->remote) {
+		char *remote_name = get_default_remote_submodule(update_data->sm_path);
+		const char *branch = remote_submodule_branch(update_data->sm_path);
+		char *remote_ref = xstrfmt("refs/remotes/%s/%s", remote_name, branch);
+
+		if (!update_data->nofetch) {
+			if (fetch_in_submodule(update_data->sm_path, update_data->depth,
+					      0, NULL))
+				die(_("Unable to fetch in submodule path '%s'"),
+				    update_data->sm_path);
+		}
+
+		if (resolve_gitlink_ref(update_data->sm_path, remote_ref, &update_data->oid))
+			die(_("Unable to find %s revision in submodule path '%s'"),
+			    remote_ref, update_data->sm_path);
+
+		free(remote_ref);
+	}
+
 	if (!oideq(&update_data->oid, &update_data->suboid) || update_data->force)
 		return do_run_update_procedure(update_data);
 

@@ -3389,10 +3396,10 @@ static struct cmd_struct commands[] = {
 	{"foreach", module_foreach, SUPPORT_SUPER_PREFIX},
 	{"init", module_init, SUPPORT_SUPER_PREFIX},
 	{"status", module_status, SUPPORT_SUPER_PREFIX},
-	{"print-default-remote", print_default_remote, 0},
 	{"sync", module_sync, SUPPORT_SUPER_PREFIX},
 	{"deinit", module_deinit, 0},
 	{"summary", module_summary, SUPPORT_SUPER_PREFIX},
+	/* NEEDSWORK: remote-branch is also obsolete */
 	{"remote-branch", resolve_remote_submodule_branch, 0},
 	{"push-check", push_check, 0},
 	{"absorb-git-dirs", absorb_git_dirs, SUPPORT_SUPER_PREFIX},

@@ -246,20 +246,6 @@ cmd_deinit()
 	git ${wt_prefix:+-C "$wt_prefix"} submodule--helper deinit ${GIT_QUIET:+--quiet} ${force:+--force} ${deinit_all:+--all} -- "$@"
 }
 
-# usage: fetch_in_submodule <module_path> [<depth>] [<sha1>]
-# Because arguments are positional, use an empty string to omit <depth>
-# but include <sha1>.
-fetch_in_submodule () (
-	sanitize_submodule_env &&
-	cd "$1" &&
-	if test $# -eq 3
-	then
-		echo "$3" | git fetch ${GIT_QUIET:+--quiet} --stdin ${2:+"$2"}
-	else
-		git fetch ${GIT_QUIET:+--quiet} ${2:+"$2"}
-	fi
-)
-
 #
 # Update each submodule path to correct revision, using clone and checkout as needed
 #

@@ -396,21 +382,6 @@ cmd_update()
 			just_cloned=
 		fi
 
-		if test -n "$remote"
-		then
-			branch=$(git submodule--helper remote-branch "$sm_path")
-			if test -z "$nofetch"
-			then
-				# Fetch remote before determining tracking $sha1
-				fetch_in_submodule "$sm_path" $depth ||
-				die "fatal: $(eval_gettext "Unable to fetch in submodule path '\$sm_path'")"
-			fi
-			remote_name=$(sanitize_submodule_env; cd "$sm_path" && git submodule--helper print-default-remote)
-			sha1=$(sanitize_submodule_env; cd "$sm_path" &&
-				git rev-parse --verify "${remote_name}/${branch}") ||
-			die "fatal: $(eval_gettext "Unable to find current \${remote_name}/\${branch} revision in submodule path '\$sm_path'")"
-		fi
-
 		out=$(git submodule--helper run-update-procedure \
 			  ${wt_prefix:+--prefix "$wt_prefix"} \
 			  ${GIT_QUIET:+--quiet} \

@@ -421,6 +392,7 @@ cmd_update()
 			  ${update:+--update "$update"} \
 			  ${prefix:+--recursive-prefix "$prefix"} \
 			  ${sha1:+--oid "$sha1"} \
+			  ${remote:+--remote} \
 			  "--" \
 			  "$sm_path")
 

@@ -2746,17 +2746,11 @@ static int push_check(int argc, const char **argv, const char *prefix)
 	return 0;
 }
 
-static int ensure_core_worktree(int argc, const char **argv, const char *prefix)
+static void ensure_core_worktree(const char *path)
 {
-	const char *path;
 	const char *cw;
 	struct repository subrepo;
 
-	if (argc != 2)
-		BUG("submodule--helper ensure-core-worktree <path>");
-
-	path = argv[1];
-
 	if (repo_submodule_init(&subrepo, the_repository, path, null_oid()))
 		die(_("could not get a repository handle for submodule '%s'"), path);
 

@@ -2776,8 +2770,6 @@ static int ensure_core_worktree(int argc, const char **argv, const char *prefix)
 		free(abs_path);
 		strbuf_release(&sb);
 	}
-
-	return 0;
 }
 
 static int absorb_git_dirs(int argc, const char **argv, const char *prefix)

@@ -2967,6 +2959,8 @@ static int module_set_branch(int argc, const char **argv, const char *prefix)
 /* NEEDSWORK: this is a temporary name until we delete update_submodule() */
 static int update_submodule2(struct update_data *update_data)
 {
+	ensure_core_worktree(update_data->sm_path);
+
 	/* NEEDSWORK: fix the style issues e.g. braces */
 	if (update_data->just_cloned) {
 		oidcpy(&update_data->suboid, null_oid());

@@ -3390,7 +3384,6 @@ static struct cmd_struct commands[] = {
 	{"add", module_add, SUPPORT_SUPER_PREFIX},
 	{"update-clone", update_clone, 0},
 	{"run-update-procedure", run_update_procedure, 0},
-	{"ensure-core-worktree", ensure_core_worktree, 0},
 	{"relative-path", resolve_relative_path, 0},
 	{"resolve-relative-url-test", resolve_relative_url_test, 0},
 	{"foreach", module_foreach, SUPPORT_SUPER_PREFIX},

@@ -373,8 +373,6 @@ cmd_update()
 	do
 		die_if_unmatched "$quickabort" "$sha1"
 
-		git submodule--helper ensure-core-worktree "$sm_path" || exit 1
-
 		displaypath=$(git submodule--helper relative-path "$prefix$sm_path" "$wt_prefix")
 
 		if test $just_cloned -eq 0

@@ -2585,9 +2585,6 @@ static int run_update_procedure(int argc, const char **argv, const char *prefix)
 		OPT_CALLBACK_F(0, "oid", &opt.oid, N_("sha1"),
 			       N_("SHA1 expected by superproject"), PARSE_OPT_NONEG,
 			       parse_opt_object_id),
-		OPT_CALLBACK_F(0, "suboid", &opt.suboid, N_("subsha1"),
-			       N_("SHA1 of submodule's HEAD"), PARSE_OPT_NONEG,
-			       parse_opt_object_id),
 		OPT_END()
 	};
 

@@ -2982,6 +2979,15 @@ static int module_set_branch(int argc, const char **argv, const char *prefix)
 /* NEEDSWORK: this is a temporary name until we delete update_submodule() */
 static int update_submodule2(struct update_data *update_data)
 {
+	/* NEEDSWORK: fix the style issues e.g. braces */
+	if (update_data->just_cloned) {
+		oidcpy(&update_data->suboid, null_oid());
+	} else {
+		if (resolve_gitlink_ref(update_data->sm_path, "HEAD", &update_data->suboid))
+			die(_("Unable to find current revision in submodule path '%s'"),
+			    update_data->displaypath);
+	}
+
 	if (!oideq(&update_data->oid, &update_data->suboid) || update_data->force)
 		return do_run_update_procedure(update_data);
 

@@ -391,14 +391,9 @@ cmd_update()
 
 		displaypath=$(git submodule--helper relative-path "$prefix$sm_path" "$wt_prefix")
 
-		if test $just_cloned -eq 1
+		if test $just_cloned -eq 0
 		then
-			subsha1=
-		else
 			just_cloned=
-			subsha1=$(sanitize_submodule_env; cd "$sm_path" &&
-				git rev-parse --verify HEAD) ||
-			die "fatal: $(eval_gettext "Unable to find current revision in submodule path '\$displaypath'")"
 		fi
 
 		if test -n "$remote"

@@ -426,7 +421,6 @@ cmd_update()
 			  ${update:+--update "$update"} \
 			  ${prefix:+--recursive-prefix "$prefix"} \
 			  ${sha1:+--oid "$sha1"} \
-			  ${subsha1:+--suboid "$subsha1"} \
 			  "--" \
 			  "$sm_path")
 

@@ -1989,6 +1989,7 @@ struct submodule_update_clone {
 	int failed_clones_nr, failed_clones_alloc;
 
 	int max_jobs;
+	unsigned int init;
 };
 #define SUBMODULE_UPDATE_CLONE_INIT { \
 	.list = MODULE_LIST_INIT, \

@@ -2483,6 +2484,8 @@ static int update_clone(int argc, const char **argv, const char *prefix)
 	struct submodule_update_clone opt = SUBMODULE_UPDATE_CLONE_INIT;
 
 	struct option module_update_clone_options[] = {
+		OPT_BOOL(0, "init", &opt.init,
+			 N_("initialize uninitialized submodules before update")),
 		OPT_STRING(0, "prefix", &prefix,
 			   N_("path"),
 			   N_("path into the working tree")),

@@ -2536,6 +2539,29 @@ static int update_clone(int argc, const char **argv, const char *prefix)
 	if (pathspec.nr)
 		opt.warn_if_uninitialized = 1;
 
+	if (opt.init) {
+		struct module_list list = MODULE_LIST_INIT;
+		struct init_cb info = INIT_CB_INIT;
+
+		if (module_list_compute(argc, argv, opt.prefix,
+					&pathspec, &list) < 0)
+			return 1;
+
+		/*
+		 * If there are no path args and submodule.active is set then,
+		 * by default, only initialize 'active' modules.
+		 */
+		if (!argc && git_config_get_value_multi("submodule.active"))
+			module_list_active(&list);
+
+		info.prefix = opt.prefix;
+		info.superprefix = opt.recursive_prefix;
+		if (opt.quiet)
+			info.flags |= OPT_QUIET;
+
+		for_each_listed_submodule(&list, init_submodule_cb, &info);
+	}
+
 	return update_submodules(&opt);
 }
 

@@ -347,14 +347,11 @@ cmd_update()
 		shift
 	done
 
-	if test -n "$init"
-	then
-		cmd_init "--" "$@" || return
-	fi
-
 	{
-	git submodule--helper update-clone ${GIT_QUIET:+--quiet} \
+	git ${wt_prefix:+-C "$wt_prefix"} submodule--helper update-clone \
+		${GIT_QUIET:+--quiet} \
 		${progress:+"--progress"} \
+		${init:+--init} \
 		${wt_prefix:+--prefix "$wt_prefix"} \
 		${prefix:+--recursive-prefix "$prefix"} \
 		${update:+--update "$update"} \

@@ -2451,120 +2451,6 @@ static void update_submodule(struct update_clone_data *ucd)
 		ucd->sub->path);
 }
 
-static int update_submodules(struct submodule_update_clone *suc)
-{
-	int i;
-
-	run_processes_parallel_tr2(suc->max_jobs, update_clone_get_next_task,
-				   update_clone_start_failure,
-				   update_clone_task_finished, suc, "submodule",
-				   "parallel/update");
-
-	/*
-	 * We saved the output and put it out all at once now.
-	 * That means:
-	 * - the listener does not have to interleave their (checkout)
-	 *   work with our fetching.  The writes involved in a
-	 *   checkout involve more straightforward sequential I/O.
-	 * - the listener can avoid doing any work if fetching failed.
-	 */
-	if (suc->quickstop)
-		return 1;
-
-	for (i = 0; i < suc->update_clone_nr; i++)
-		update_submodule(&suc->update_clone[i]);
-
-	return 0;
-}
-
-static int update_clone(int argc, const char **argv, const char *prefix)
-{
-	const char *update = NULL;
-	struct pathspec pathspec;
-	struct submodule_update_clone opt = SUBMODULE_UPDATE_CLONE_INIT;
-
-	struct option module_update_clone_options[] = {
-		OPT_BOOL(0, "init", &opt.init,
-			 N_("initialize uninitialized submodules before update")),
-		OPT_STRING(0, "prefix", &prefix,
-			   N_("path"),
-			   N_("path into the working tree")),
-		OPT_STRING(0, "recursive-prefix", &opt.recursive_prefix,
-			   N_("path"),
-			   N_("path into the working tree, across nested "
-			      "submodule boundaries")),
-		OPT_STRING(0, "update", &update,
-			   N_("string"),
-			   N_("rebase, merge, checkout or none")),
-		OPT_STRING_LIST(0, "reference", &opt.references, N_("repo"),
-			   N_("reference repository")),
-		OPT_BOOL(0, "dissociate", &opt.dissociate,
-			   N_("use --reference only while cloning")),
-		OPT_STRING(0, "depth", &opt.depth, "<depth>",
-			   N_("create a shallow clone truncated to the "
-			      "specified number of revisions")),
-		OPT_INTEGER('j', "jobs", &opt.max_jobs,
-			    N_("parallel jobs")),
-		OPT_BOOL(0, "recommend-shallow", &opt.recommend_shallow,
-			    N_("whether the initial clone should follow the shallow recommendation")),
-		OPT__QUIET(&opt.quiet, N_("don't print cloning progress")),
-		OPT_BOOL(0, "progress", &opt.progress,
-			    N_("force cloning progress")),
-		OPT_BOOL(0, "require-init", &opt.require_init,
-			   N_("disallow cloning into non-empty directory")),
-		OPT_BOOL(0, "single-branch", &opt.single_branch,
-			 N_("clone only one branch, HEAD or --branch")),
-		OPT_END()
-	};
-
-	const char *const git_submodule_helper_usage[] = {
-		N_("git submodule--helper update-clone [--prefix=<path>] [<path>...]"),
-		NULL
-	};
-	opt.prefix = prefix;
-
-	update_clone_config_from_gitmodules(&opt.max_jobs);
-	git_config(git_update_clone_config, &opt.max_jobs);
-
-	argc = parse_options(argc, argv, prefix, module_update_clone_options,
-			     git_submodule_helper_usage, 0);
-
-	if (update)
-		if (parse_submodule_update_strategy(update, &opt.update) < 0)
-			die(_("bad value for update parameter"));
-
-	if (module_list_compute(argc, argv, prefix, &pathspec, &opt.list) < 0)
-		return 1;
-
-	if (pathspec.nr)
-		opt.warn_if_uninitialized = 1;
-
-	if (opt.init) {
-		struct module_list list = MODULE_LIST_INIT;
-		struct init_cb info = INIT_CB_INIT;
-
-		if (module_list_compute(argc, argv, opt.prefix,
-					&pathspec, &list) < 0)
-			return 1;
-
-		/*
-		 * If there are no path args and submodule.active is set then,
-		 * by default, only initialize 'active' modules.
-		 */
-		if (!argc && git_config_get_value_multi("submodule.active"))
-			module_list_active(&list);
-
-		info.prefix = opt.prefix;
-		info.superprefix = opt.recursive_prefix;
-		if (opt.quiet)
-			info.flags |= OPT_QUIET;
-
-		for_each_listed_submodule(&list, init_submodule_cb, &info);
-	}
-
-	return update_submodules(&opt);
-}
-
 /*
  * NEEDSWORK: Use a forward declaration to avoid moving
  * run_update_procedure() (which will be removed soon).

@@ -3021,6 +2907,120 @@ static int update_submodule2(struct update_data *update_data)
 	return 3;
 }
 
+static int update_submodules(struct submodule_update_clone *suc)
+{
+	int i;
+
+	run_processes_parallel_tr2(suc->max_jobs, update_clone_get_next_task,
+				   update_clone_start_failure,
+				   update_clone_task_finished, suc, "submodule",
+				   "parallel/update");
+
+	/*
+	 * We saved the output and put it out all at once now.
+	 * That means:
+	 * - the listener does not have to interleave their (checkout)
+	 *   work with our fetching.  The writes involved in a
+	 *   checkout involve more straightforward sequential I/O.
+	 * - the listener can avoid doing any work if fetching failed.
+	 */
+	if (suc->quickstop)
+		return 1;
+
+	for (i = 0; i < suc->update_clone_nr; i++)
+		update_submodule(&suc->update_clone[i]);
+
+	return 0;
+}
+
+static int update_clone(int argc, const char **argv, const char *prefix)
+{
+	const char *update = NULL;
+	struct pathspec pathspec;
+	struct submodule_update_clone opt = SUBMODULE_UPDATE_CLONE_INIT;
+
+	struct option module_update_clone_options[] = {
+		OPT_BOOL(0, "init", &opt.init,
+			 N_("initialize uninitialized submodules before update")),
+		OPT_STRING(0, "prefix", &prefix,
+			   N_("path"),
+			   N_("path into the working tree")),
+		OPT_STRING(0, "recursive-prefix", &opt.recursive_prefix,
+			   N_("path"),
+			   N_("path into the working tree, across nested "
+			      "submodule boundaries")),
+		OPT_STRING(0, "update", &update,
+			   N_("string"),
+			   N_("rebase, merge, checkout or none")),
+		OPT_STRING_LIST(0, "reference", &opt.references, N_("repo"),
+			   N_("reference repository")),
+		OPT_BOOL(0, "dissociate", &opt.dissociate,
+			   N_("use --reference only while cloning")),
+		OPT_STRING(0, "depth", &opt.depth, "<depth>",
+			   N_("create a shallow clone truncated to the "
+			      "specified number of revisions")),
+		OPT_INTEGER('j', "jobs", &opt.max_jobs,
+			    N_("parallel jobs")),
+		OPT_BOOL(0, "recommend-shallow", &opt.recommend_shallow,
+			    N_("whether the initial clone should follow the shallow recommendation")),
+		OPT__QUIET(&opt.quiet, N_("don't print cloning progress")),
+		OPT_BOOL(0, "progress", &opt.progress,
+			    N_("force cloning progress")),
+		OPT_BOOL(0, "require-init", &opt.require_init,
+			   N_("disallow cloning into non-empty directory")),
+		OPT_BOOL(0, "single-branch", &opt.single_branch,
+			 N_("clone only one branch, HEAD or --branch")),
+		OPT_END()
+	};
+
+	const char *const git_submodule_helper_usage[] = {
+		N_("git submodule--helper update-clone [--prefix=<path>] [<path>...]"),
+		NULL
+	};
+	opt.prefix = prefix;
+
+	update_clone_config_from_gitmodules(&opt.max_jobs);
+	git_config(git_update_clone_config, &opt.max_jobs);
+
+	argc = parse_options(argc, argv, prefix, module_update_clone_options,
+			     git_submodule_helper_usage, 0);
+
+	if (update)
+		if (parse_submodule_update_strategy(update, &opt.update) < 0)
+			die(_("bad value for update parameter"));
+
+	if (module_list_compute(argc, argv, prefix, &pathspec, &opt.list) < 0)
+		return 1;
+
+	if (pathspec.nr)
+		opt.warn_if_uninitialized = 1;
+
+	if (opt.init) {
+		struct module_list list = MODULE_LIST_INIT;
+		struct init_cb info = INIT_CB_INIT;
+
+		if (module_list_compute(argc, argv, opt.prefix,
+					&pathspec, &list) < 0)
+			return 1;
+
+		/*
+		 * If there are no path args and submodule.active is set then,
+		 * by default, only initialize 'active' modules.
+		 */
+		if (!argc && git_config_get_value_multi("submodule.active"))
+			module_list_active(&list);
+
+		info.prefix = opt.prefix;
+		info.superprefix = opt.recursive_prefix;
+		if (opt.quiet)
+			info.flags |= OPT_QUIET;
+
+		for_each_listed_submodule(&list, init_submodule_cb, &info);
+	}
+
+	return update_submodules(&opt);
+}
+
 struct add_data {
 	const char *prefix;
 	const char *branch;