1 files changed, 186 insertions, 22 deletions

diff --git a/builtin/submodule--helper.c b/builtin/submodule--helper.c
index 4f35c98bb9..c9c2f0e102 100644
--- a/builtin/submodule--helper.c
+++ b/builtin/submodule--helper.c
@@ -12,10 +12,12 @@
 #include "run-command.h"
 #include "remote.h"
 #include "refs.h"
+#include "refspec.h"
 #include "connect.h"
 #include "revision.h"
 #include "diffcore.h"
 #include "diff.h"
+#include "object-store.h"
 
 #define OPT_QUIET (1 << 0)
 #define OPT_CACHED (1 << 1)
@@ -438,6 +440,149 @@ static void for_each_listed_submodule(const struct module_list *list,
 		fn(list->entries[i], cb_data);
 }
 
+struct cb_foreach {
+	int argc;
+	const char **argv;
+	const char *prefix;
+	int quiet;
+	int recursive;
+};
+#define CB_FOREACH_INIT { 0 }
+
+static void runcommand_in_submodule_cb(const struct cache_entry *list_item,
+				       void *cb_data)
+{
+	struct cb_foreach *info = cb_data;
+	const char *path = list_item->name;
+	const struct object_id *ce_oid = &list_item->oid;
+
+	const struct submodule *sub;
+	struct child_process cp = CHILD_PROCESS_INIT;
+	char *displaypath;
+
+	displaypath = get_submodule_displaypath(path, info->prefix);
+
+	sub = submodule_from_path(the_repository, &null_oid, path);
+
+	if (!sub)
+		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);
+
+	/*
+	 * For the purpose of executing <command> in the submodule,
+	 * separate shell is used for the purpose of running the
+	 * child process.
+	 */
+	cp.use_shell = 1;
+	cp.dir = path;
+
+	/*
+	 * NEEDSWORK: the command currently has access to the variables $name,
+	 * $sm_path, $displaypath, $sha1 and $toplevel only when the command
+	 * contains a single argument. This is done for maintaining a faithful
+	 * translation from shell script.
+	 */
+	if (info->argc == 1) {
+		char *toplevel = xgetcwd();
+		struct strbuf sb = STRBUF_INIT;
+
+		argv_array_pushf(&cp.env_array, "name=%s", sub->name);
+		argv_array_pushf(&cp.env_array, "sm_path=%s", path);
+		argv_array_pushf(&cp.env_array, "displaypath=%s", displaypath);
+		argv_array_pushf(&cp.env_array, "sha1=%s",
+				oid_to_hex(ce_oid));
+		argv_array_pushf(&cp.env_array, "toplevel=%s", toplevel);
+
+		/*
+		 * Since the path variable was accessible from the script
+		 * before porting, it is also made available after porting.
+		 * The environment variable "PATH" has a very special purpose
+		 * on windows. And since environment variables are
+		 * case-insensitive in windows, it interferes with the
+		 * existing PATH variable. Hence, to avoid that, we expose
+		 * path via the args argv_array and not via env_array.
+		 */
+		sq_quote_buf(&sb, path);
+		argv_array_pushf(&cp.args, "path=%s; %s",
+				 sb.buf, info->argv[0]);
+		strbuf_release(&sb);
+		free(toplevel);
+	} else {
+		argv_array_pushv(&cp.args, info->argv);
+	}
+
+	if (!info->quiet)
+		printf(_("Entering '%s'\n"), displaypath);
+
+	if (info->argv[0] && run_command(&cp))
+		die(_("run_command returned non-zero status for %s\n."),
+			displaypath);
+
+	if (info->recursive) {
+		struct child_process cpr = CHILD_PROCESS_INIT;
+
+		cpr.git_cmd = 1;
+		cpr.dir = path;
+		prepare_submodule_repo_env(&cpr.env_array);
+
+		argv_array_pushl(&cpr.args, "--super-prefix", NULL);
+		argv_array_pushf(&cpr.args, "%s/", displaypath);
+		argv_array_pushl(&cpr.args, "submodule--helper", "foreach", "--recursive",
+				NULL);
+
+		if (info->quiet)
+			argv_array_push(&cpr.args, "--quiet");
+
+		argv_array_pushv(&cpr.args, info->argv);
+
+		if (run_command(&cpr))
+			die(_("run_command returned non-zero status while"
+				"recursing in the nested submodules of %s\n."),
+				displaypath);
+	}
+
+cleanup:
+	free(displaypath);
+}
+
+static int module_foreach(int argc, const char **argv, const char *prefix)
+{
+	struct cb_foreach info = CB_FOREACH_INIT;
+	struct pathspec pathspec;
+	struct module_list list = MODULE_LIST_INIT;
+
+	struct option module_foreach_options[] = {
+		OPT__QUIET(&info.quiet, N_("Suppress output of entering each submodule command")),
+		OPT_BOOL(0, "recursive", &info.recursive,
+			 N_("Recurse into nested submodules")),
+		OPT_END()
+	};
+
+	const char *const git_submodule_helper_usage[] = {
+		N_("git submodule--helper foreach [--quiet] [--recursive] <command>"),
+		NULL
+	};
+
+	argc = parse_options(argc, argv, prefix, module_foreach_options,
+			     git_submodule_helper_usage, PARSE_OPT_KEEP_UNKNOWN);
+
+	if (module_list_compute(0, NULL, prefix, &pathspec, &list) < 0)
+		return 1;
+
+	info.argc = argc;
+	info.argv = argv;
+	info.prefix = prefix;
+
+	for_each_listed_submodule(&list, runcommand_in_submodule_cb, &info);
+
+	return 0;
+}
+
 struct init_cb {
 	const char *prefix;
 	unsigned int flags;
@@ -454,7 +599,7 @@ static void init_submodule(const char *path, const char *prefix,
 
 	displaypath = get_submodule_displaypath(path, prefix);
 
-	sub = submodule_from_path(&null_oid, path);
+	sub = submodule_from_path(the_repository, &null_oid, path);
 
 	if (!sub)
 		die(_("No url found for submodule path '%s' in .gitmodules"),
@@ -595,8 +740,12 @@ static void print_status(unsigned int flags, char state, const char *path,
 
 	printf("%c%s %s", state, oid_to_hex(oid), displaypath);
 
-	if (state == ' ' || state == '+')
-		printf(" (%s)", compute_rev_name(path, oid_to_hex(oid)));
+	if (state == ' ' || state == '+') {
+		const char *name = compute_rev_name(path, oid_to_hex(oid));
+
+		if (name)
+			printf(" (%s)", name);
+	}
 
 	printf("\n");
 }
@@ -621,7 +770,7 @@ static void status_submodule(const char *path, const struct object_id *ce_oid,
 	struct rev_info rev;
 	int diff_files_result;
 
-	if (!submodule_from_path(&null_oid, path))
+	if (!submodule_from_path(the_repository, &null_oid, path))
 		die(_("no submodule mapping found in .gitmodules for path '%s'"),
 		      path);
 
@@ -654,9 +803,13 @@ static void status_submodule(const char *path, const struct object_id *ce_oid,
 			     displaypath);
 	} else if (!(flags & OPT_CACHED)) {
 		struct object_id oid;
+		struct ref_store *refs = get_submodule_ref_store(path);
 
-		if (refs_head_ref(get_submodule_ref_store(path),
-				  handle_submodule_head_ref, &oid))
+		if (!refs) {
+			print_status(flags, '-', path, ce_oid, displaypath);
+			goto cleanup;
+		}
+		if (refs_head_ref(refs, handle_submodule_head_ref, &oid))
 			die(_("could not resolve HEAD ref inside the "
 			      "submodule '%s'"), path);
 
@@ -741,7 +894,7 @@ static int module_name(int argc, const char **argv, const char *prefix)
 	if (argc != 2)
 		usage(_("git submodule--helper name <path>"));
 
-	sub = submodule_from_path(&null_oid, argv[1]);
+	sub = submodule_from_path(the_repository, &null_oid, argv[1]);
 
 	if (!sub)
 		die(_("no submodule mapping found in .gitmodules for path '%s'"),
@@ -772,7 +925,7 @@ static void sync_submodule(const char *path, const char *prefix,
 	if (!is_submodule_active(the_repository, path))
 		return;
 
-	sub = submodule_from_path(&null_oid, path);
+	sub = submodule_from_path(the_repository, &null_oid, path);
 
 	if (sub && sub->url) {
 		if (starts_with_dot_dot_slash(sub->url) ||
@@ -925,7 +1078,7 @@ static void deinit_submodule(const char *path, const char *prefix,
 	struct strbuf sb_config = STRBUF_INIT;
 	char *sub_git_dir = xstrfmt("%s/.git", path);
 
-	sub = submodule_from_path(&null_oid, path);
+	sub = submodule_from_path(the_repository, &null_oid, path);
 
 	if (!sub || !sub->name)
 		goto cleanup;
@@ -1056,7 +1209,7 @@ static int module_deinit(int argc, const char **argv, const char *prefix)
 }
 
 static int clone_submodule(const char *path, const char *gitdir, const char *url,
-			   const char *depth, struct string_list *reference,
+			   const char *depth, struct string_list *reference, int dissociate,
 			   int quiet, int progress)
 {
 	struct child_process cp = CHILD_PROCESS_INIT;
@@ -1075,6 +1228,8 @@ static int clone_submodule(const char *path, const char *gitdir, const char *url
 			argv_array_pushl(&cp.args, "--reference",
 					 item->string, NULL);
 	}
+	if (dissociate)
+		argv_array_push(&cp.args, "--dissociate");
 	if (gitdir && *gitdir)
 		argv_array_pushl(&cp.args, "--separate-git-dir", gitdir, NULL);
 
@@ -1190,6 +1345,7 @@ static int module_clone(int argc, const char **argv, const char *prefix)
 	char *p, *path = NULL, *sm_gitdir;
 	struct strbuf sb = STRBUF_INIT;
 	struct string_list reference = STRING_LIST_INIT_NODUP;
+	int dissociate = 0;
 	char *sm_alternate = NULL, *error_strategy = NULL;
 
 	struct option module_clone_options[] = {
@@ -1208,6 +1364,8 @@ static int module_clone(int argc, const char **argv, const char *prefix)
 		OPT_STRING_LIST(0, "reference", &reference,
 			   N_("repo"),
 			   N_("reference repository")),
+		OPT_BOOL(0, "dissociate", &dissociate,
+			   N_("use --reference only while cloning")),
 		OPT_STRING(0, "depth", &depth,
 			   N_("string"),
 			   N_("depth for shallow clones")),
@@ -1247,7 +1405,7 @@ static int module_clone(int argc, const char **argv, const char *prefix)
 
 		prepare_possible_alternates(name, &reference);
 
-		if (clone_submodule(path, sm_gitdir, url, depth, &reference,
+		if (clone_submodule(path, sm_gitdir, url, depth, &reference, dissociate,
 				    quiet, progress))
 			die(_("clone of '%s' into submodule path '%s' failed"),
 			    url, path);
@@ -1259,8 +1417,7 @@ static int module_clone(int argc, const char **argv, const char *prefix)
 		strbuf_reset(&sb);
 	}
 
-	/* Connect module worktree and git dir */
-	connect_work_tree_and_git_dir(path, sm_gitdir);
+	connect_work_tree_and_git_dir(path, sm_gitdir, 0);
 
 	p = git_pathdup_submodule(path, "config");
 	if (!p)
@@ -1300,6 +1457,7 @@ struct submodule_update_clone {
 	int quiet;
 	int recommend_shallow;
 	struct string_list references;
+	int dissociate;
 	const char *depth;
 	const char *recursive_prefix;
 	const char *prefix;
@@ -1315,7 +1473,7 @@ struct submodule_update_clone {
 	int failed_clones_nr, failed_clones_alloc;
 };
 #define SUBMODULE_UPDATE_CLONE_INIT {0, MODULE_LIST_INIT, 0, \
-	SUBMODULE_UPDATE_STRATEGY_INIT, 0, 0, -1, STRING_LIST_INIT_DUP, \
+	SUBMODULE_UPDATE_STRATEGY_INIT, 0, 0, -1, STRING_LIST_INIT_DUP, 0, \
 	NULL, NULL, NULL, \
 	STRING_LIST_INIT_DUP, 0, NULL, 0, 0}
 
@@ -1367,7 +1525,7 @@ static int prepare_to_clone_next_submodule(const struct cache_entry *ce,
 		goto cleanup;
 	}
 
-	sub = submodule_from_path(&null_oid, ce->name);
+	sub = submodule_from_path(the_repository, &null_oid, ce->name);
 
 	if (suc->recursive_prefix)
 		displaypath = relative_path(suc->recursive_prefix,
@@ -1442,6 +1600,8 @@ static int prepare_to_clone_next_submodule(const struct cache_entry *ce,
 		for_each_string_list_item(item, &suc->references)
 			argv_array_pushl(&child->args, "--reference", item->string, NULL);
 	}
+	if (suc->dissociate)
+		argv_array_push(&child->args, "--dissociate");
 	if (suc->depth)
 		argv_array_push(&child->args, suc->depth);
 
@@ -1575,6 +1735,8 @@ static int update_clone(int argc, const char **argv, const char *prefix)
 			   N_("rebase, merge, checkout or none")),
 		OPT_STRING_LIST(0, "reference", &suc.references, N_("repo"),
 			   N_("reference repository")),
+		OPT_BOOL(0, "dissociate", &suc.dissociate,
+			   N_("use --reference only while cloning")),
 		OPT_STRING(0, "depth", &suc.depth, "<depth>",
 			   N_("Create a shallow clone truncated to the "
 			      "specified number of revisions")),
@@ -1650,7 +1812,7 @@ static const char *remote_submodule_branch(const char *path)
 	const char *branch = NULL;
 	char *key;
 
-	sub = submodule_from_path(&null_oid, path);
+	sub = submodule_from_path(the_repository, &null_oid, path);
 	if (!sub)
 		return NULL;
 
@@ -1735,13 +1897,14 @@ static int push_check(int argc, const char **argv, const char *prefix)
 
 	/* Check the refspec */
 	if (argc > 2) {
-		int i, refspec_nr = argc - 2;
+		int i;
 		struct ref *local_refs = get_local_heads();
-		struct refspec *refspec = parse_push_refspec(refspec_nr,
-							     argv + 2);
+		struct refspec refspec = REFSPEC_INIT_PUSH;
+
+		refspec_appendn(&refspec, argv + 2, argc - 2);
 
-		for (i = 0; i < refspec_nr; i++) {
-			struct refspec *rs = refspec + i;
+		for (i = 0; i < refspec.nr; i++) {
+			const struct refspec_item *rs = &refspec.items[i];
 
 			if (rs->pattern || rs->matching)
 				continue;
@@ -1768,7 +1931,7 @@ static int push_check(int argc, const char **argv, const char *prefix)
 				    rs->src);
 			}
 		}
-		free_refspec(refspec_nr, refspec);
+		refspec_clear(&refspec);
 	}
 	free(head);
 
@@ -1856,6 +2019,7 @@ static struct cmd_struct commands[] = {
 	{"relative-path", resolve_relative_path, 0},
 	{"resolve-relative-url", resolve_relative_url, 0},
 	{"resolve-relative-url-test", resolve_relative_url_test, 0},
+	{"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},