Merge branch 'bw/grep-recurse-submodules'

"git grep --recurse-submodules" has been reworked to give a more
consistent output across submodule boundary (and do its thing
without having to fork a separate process).

* bw/grep-recurse-submodules:
  grep: recurse in-process using 'struct repository'
  submodule: merge repo_read_gitmodules and gitmodules_config
  submodule: check for unmerged .gitmodules outside of config parsing
  submodule: check for unstaged .gitmodules outside of config parsing
  submodule: remove fetch.recursesubmodules from submodule-config parsing
  submodule: remove submodule.fetchjobs from submodule-config parsing
  config: add config_from_gitmodules
  cache.h: add GITMODULES_FILE macro
  repository: have the_repository use the_index
  repo_read_index: don't discard the index

20 files changed, 246 insertions, 449 deletions

diff --git a/Documentation/git-grep.txt b/Documentation/git-grep.txt
index 5033483db..720c7850e 100644
--- a/Documentation/git-grep.txt
+++ b/Documentation/git-grep.txt
@@ -95,13 +95,6 @@ OPTIONS
 	<tree> option the prefix of all submodule output will be the name of
 	the parent project's <tree> object.
 
---parent-basename <basename>::
-	For internal use only.  In order to produce uniform output with the
-	--recurse-submodules option, this option can be used to provide the
-	basename of a parent's <tree> object to a submodule so the submodule
-	can prefix its output with the parent's name rather than the SHA1 of
-	the submodule.
-
 -a::
 --text::
 	Process binary files as if they were text.
diff --git a/builtin/fetch.c b/builtin/fetch.c
index c87e59f3b..d84c26391 100644
--- a/builtin/fetch.c
+++ b/builtin/fetch.c
@@ -39,7 +39,7 @@ static int prune = -1; /* unspecified */
 static int all, append, dry_run, force, keep, multiple, update_head_ok, verbosity, deepen_relative;
 static int progress = -1;
 static int tags = TAGS_DEFAULT, unshallow, update_shallow, deepen;
-static int max_children = -1;
+static int max_children = 1;
 static enum transport_family family;
 static const char *depth;
 static const char *deepen_since;
@@ -68,9 +68,30 @@ static int git_fetch_config(const char *k, const char *v, void *cb)
 		recurse_submodules = r;
 	}
 
+	if (!strcmp(k, "submodule.fetchjobs")) {
+		max_children = parse_submodule_fetchjobs(k, v);
+		return 0;
+	} else if (!strcmp(k, "fetch.recursesubmodules")) {
+		recurse_submodules = parse_fetch_recurse_submodules_arg(k, v);
+		return 0;
+	}
+
 	return git_default_config(k, v, cb);
 }
 
+static int gitmodules_fetch_config(const char *var, const char *value, void *cb)
+{
+	if (!strcmp(var, "submodule.fetchjobs")) {
+		max_children = parse_submodule_fetchjobs(var, value);
+		return 0;
+	} else if (!strcmp(var, "fetch.recursesubmodules")) {
+		recurse_submodules = parse_fetch_recurse_submodules_arg(var, value);
+		return 0;
+	}
+
+	return 0;
+}
+
 static int parse_refmap_arg(const struct option *opt, const char *arg, int unset)
 {
 	ALLOC_GROW(refmap_array, refmap_nr + 1, refmap_alloc);
@@ -1311,6 +1332,7 @@ int cmd_fetch(int argc, const char **argv, const char *prefix)
 	for (i = 1; i < argc; i++)
 		strbuf_addf(&default_rla, " %s", argv[i]);
 
+	config_from_gitmodules(gitmodules_fetch_config, NULL);
 	git_config(git_fetch_config, NULL);
 
 	argc = parse_options(argc, argv, prefix,
@@ -1339,7 +1361,6 @@ int cmd_fetch(int argc, const char **argv, const char *prefix)
 		deepen = 1;
 
 	if (recurse_submodules != RECURSE_SUBMODULES_OFF) {
-		set_config_fetch_recurse_submodules(recurse_submodules_default);
 		gitmodules_config();
 		git_config(submodule_config, NULL);
 	}
@@ -1383,6 +1404,7 @@ int cmd_fetch(int argc, const char **argv, const char *prefix)
 		result = fetch_populated_submodules(&options,
 						    submodule_prefix,
 						    recurse_submodules,
+						    recurse_submodules_default,
 						    verbosity < 0,
 						    max_children);
 		argv_array_clear(&options);
diff --git a/builtin/grep.c b/builtin/grep.c
index 3cbee04dc..a70d8e2fb 100644
--- a/builtin/grep.c
+++ b/builtin/grep.c
@@ -28,13 +28,7 @@ static char const * const grep_usage[] = {
 	NULL
 };
 
-static const char *super_prefix;
 static int recurse_submodules;
-static struct argv_array submodule_options = ARGV_ARRAY_INIT;
-static const char *parent_basename;
-
-static int grep_submodule_launch(struct grep_opt *opt,
-				 const struct grep_source *gs);
 
 #define GREP_NUM_THREADS_DEFAULT 8
 static int num_threads;
@@ -186,10 +180,7 @@ static void *run(void *arg)
 			break;
 
 		opt->output_priv = w;
-		if (w->source.type == GREP_SOURCE_SUBMODULE)
-			hit |= grep_submodule_launch(opt, &w->source);
-		else
-			hit |= grep_source(opt, &w->source);
+		hit |= grep_source(opt, &w->source);
 		grep_source_clear_data(&w->source);
 		work_done(w);
 	}
@@ -327,21 +318,13 @@ static int grep_oid(struct grep_opt *opt, const struct object_id *oid,
 {
 	struct strbuf pathbuf = STRBUF_INIT;
 
-	if (super_prefix) {
-		strbuf_add(&pathbuf, filename, tree_name_len);
-		strbuf_addstr(&pathbuf, super_prefix);
-		strbuf_addstr(&pathbuf, filename + tree_name_len);
+	if (opt->relative && opt->prefix_length) {
+		quote_path_relative(filename + tree_name_len, opt->prefix, &pathbuf);
+		strbuf_insert(&pathbuf, 0, filename, tree_name_len);
 	} else {
 		strbuf_addstr(&pathbuf, filename);
 	}
 
-	if (opt->relative && opt->prefix_length) {
-		char *name = strbuf_detach(&pathbuf, NULL);
-		quote_path_relative(name + tree_name_len, opt->prefix, &pathbuf);
-		strbuf_insert(&pathbuf, 0, name, tree_name_len);
-		free(name);
-	}
-
 #ifndef NO_PTHREADS
 	if (num_threads) {
 		add_work(opt, GREP_SOURCE_OID, pathbuf.buf, path, oid);
@@ -366,15 +349,10 @@ static int grep_file(struct grep_opt *opt, const char *filename)
 {
 	struct strbuf buf = STRBUF_INIT;
 
-	if (super_prefix)
-		strbuf_addstr(&buf, super_prefix);
-	strbuf_addstr(&buf, filename);
-
-	if (opt->relative && opt->prefix_length) {
-		char *name = strbuf_detach(&buf, NULL);
-		quote_path_relative(name, opt->prefix, &buf);
-		free(name);
-	}
+	if (opt->relative && opt->prefix_length)
+		quote_path_relative(filename, opt->prefix, &buf);
+	else
+		strbuf_addstr(&buf, filename);
 
 #ifndef NO_PTHREADS
 	if (num_threads) {
@@ -421,284 +399,89 @@ static void run_pager(struct grep_opt *opt, const char *prefix)
 		exit(status);
 }
 
-static void compile_submodule_options(const struct grep_opt *opt,
-				      const char **argv,
-				      int cached, int untracked,
-				      int opt_exclude, int use_index,
-				      int pattern_type_arg)
-{
-	struct grep_pat *pattern;
-
-	if (recurse_submodules)
-		argv_array_push(&submodule_options, "--recurse-submodules");
-
-	if (cached)
-		argv_array_push(&submodule_options, "--cached");
-	if (!use_index)
-		argv_array_push(&submodule_options, "--no-index");
-	if (untracked)
-		argv_array_push(&submodule_options, "--untracked");
-	if (opt_exclude > 0)
-		argv_array_push(&submodule_options, "--exclude-standard");
-
-	if (opt->invert)
-		argv_array_push(&submodule_options, "-v");
-	if (opt->ignore_case)
-		argv_array_push(&submodule_options, "-i");
-	if (opt->word_regexp)
-		argv_array_push(&submodule_options, "-w");
-	switch (opt->binary) {
-	case GREP_BINARY_NOMATCH:
-		argv_array_push(&submodule_options, "-I");
-		break;
-	case GREP_BINARY_TEXT:
-		argv_array_push(&submodule_options, "-a");
-		break;
-	default:
-		break;
-	}
-	if (opt->allow_textconv)
-		argv_array_push(&submodule_options, "--textconv");
-	if (opt->max_depth != -1)
-		argv_array_pushf(&submodule_options, "--max-depth=%d",
-				 opt->max_depth);
-	if (opt->linenum)
-		argv_array_push(&submodule_options, "-n");
-	if (!opt->pathname)
-		argv_array_push(&submodule_options, "-h");
-	if (!opt->relative)
-		argv_array_push(&submodule_options, "--full-name");
-	if (opt->name_only)
-		argv_array_push(&submodule_options, "-l");
-	if (opt->unmatch_name_only)
-		argv_array_push(&submodule_options, "-L");
-	if (opt->null_following_name)
-		argv_array_push(&submodule_options, "-z");
-	if (opt->count)
-		argv_array_push(&submodule_options, "-c");
-	if (opt->file_break)
-		argv_array_push(&submodule_options, "--break");
-	if (opt->heading)
-		argv_array_push(&submodule_options, "--heading");
-	if (opt->pre_context)
-		argv_array_pushf(&submodule_options, "--before-context=%d",
-				 opt->pre_context);
-	if (opt->post_context)
-		argv_array_pushf(&submodule_options, "--after-context=%d",
-				 opt->post_context);
-	if (opt->funcname)
-		argv_array_push(&submodule_options, "-p");
-	if (opt->funcbody)
-		argv_array_push(&submodule_options, "-W");
-	if (opt->all_match)
-		argv_array_push(&submodule_options, "--all-match");
-	if (opt->debug)
-		argv_array_push(&submodule_options, "--debug");
-	if (opt->status_only)
-		argv_array_push(&submodule_options, "-q");
-
-	switch (pattern_type_arg) {
-	case GREP_PATTERN_TYPE_BRE:
-		argv_array_push(&submodule_options, "-G");
-		break;
-	case GREP_PATTERN_TYPE_ERE:
-		argv_array_push(&submodule_options, "-E");
-		break;
-	case GREP_PATTERN_TYPE_FIXED:
-		argv_array_push(&submodule_options, "-F");
-		break;
-	case GREP_PATTERN_TYPE_PCRE:
-		argv_array_push(&submodule_options, "-P");
-		break;
-	case GREP_PATTERN_TYPE_UNSPECIFIED:
-		break;
-	default:
-		die("BUG: Added a new grep pattern type without updating switch statement");
-	}
-
-	for (pattern = opt->pattern_list; pattern != NULL;
-	     pattern = pattern->next) {
-		switch (pattern->token) {
-		case GREP_PATTERN:
-			argv_array_pushf(&submodule_options, "-e%s",
-					 pattern->pattern);
-			break;
-		case GREP_AND:
-		case GREP_OPEN_PAREN:
-		case GREP_CLOSE_PAREN:
-		case GREP_NOT:
-		case GREP_OR:
-			argv_array_push(&submodule_options, pattern->pattern);
-			break;
-		/* BODY and HEAD are not used by git-grep */
-		case GREP_PATTERN_BODY:
-		case GREP_PATTERN_HEAD:
-			break;
-		}
-	}
-
-	/*
-	 * Limit number of threads for child process to use.
-	 * This is to prevent potential fork-bomb behavior of git-grep as each
-	 * submodule process has its own thread pool.
-	 */
-	argv_array_pushf(&submodule_options, "--threads=%d",
-			 DIV_ROUND_UP(num_threads, 2));
-
-	/* Add Pathspecs */
-	argv_array_push(&submodule_options, "--");
-	for (; *argv; argv++)
-		argv_array_push(&submodule_options, *argv);
-}
+static int grep_cache(struct grep_opt *opt, struct repository *repo,
+		      const struct pathspec *pathspec, int cached);
+static int grep_tree(struct grep_opt *opt, const struct pathspec *pathspec,
+		     struct tree_desc *tree, struct strbuf *base, int tn_len,
+		     int check_attr, struct repository *repo);
 
-/*
- * Launch child process to grep contents of a submodule
- */
-static int grep_submodule_launch(struct grep_opt *opt,
-				 const struct grep_source *gs)
+static int grep_submodule(struct grep_opt *opt, struct repository *superproject,
+			  const struct pathspec *pathspec,
+			  const struct object_id *oid,
+			  const char *filename, const char *path)
 {
-	struct child_process cp = CHILD_PROCESS_INIT;
-	int status, i;
-	const char *end_of_base;
-	const char *name;
-	struct strbuf child_output = STRBUF_INIT;
-
-	end_of_base = strchr(gs->name, ':');
-	if (gs->identifier && end_of_base)
-		name = end_of_base + 1;
-	else
-		name = gs->name;
+	struct repository submodule;
+	int hit;
 
-	prepare_submodule_repo_env(&cp.env_array);
-	argv_array_push(&cp.env_array, GIT_DIR_ENVIRONMENT);
+	if (!is_submodule_active(superproject, path))
+		return 0;
 
-	if (opt->relative && opt->prefix_length)
-		argv_array_pushf(&cp.env_array, "%s=%s",
-				 GIT_TOPLEVEL_PREFIX_ENVIRONMENT,
-				 opt->prefix);
+	if (repo_submodule_init(&submodule, superproject, path))
+		return 0;
 
-	/* Add super prefix */
-	argv_array_pushf(&cp.args, "--super-prefix=%s%s/",
-			 super_prefix ? super_prefix : "",
-			 name);
-	argv_array_push(&cp.args, "grep");
+	repo_read_gitmodules(&submodule);
 
 	/*
-	 * Add basename of parent project
-	 * When performing grep on a tree object the filename is prefixed
-	 * with the object's name: 'tree-name:filename'.  In order to
-	 * provide uniformity of output we want to pass the name of the
-	 * parent project's object name to the submodule so the submodule can
-	 * prefix its output with the parent's name and not its own OID.
+	 * NEEDSWORK: This adds the submodule's object directory to the list of
+	 * alternates for the single in-memory object store.  This has some bad
+	 * consequences for memory (processed objects will never be freed) and
+	 * performance (this increases the number of pack files git has to pay
+	 * attention to, to the sum of the number of pack files in all the
+	 * repositories processed so far).  This can be removed once the object
+	 * store is no longer global and instead is a member of the repository
+	 * object.
 	 */
-	if (gs->identifier && end_of_base)
-		argv_array_pushf(&cp.args, "--parent-basename=%.*s",
-				 (int) (end_of_base - gs->name),
-				 gs->name);
+	add_to_alternates_memory(submodule.objectdir);
 
-	/* Add options */
-	for (i = 0; i < submodule_options.argc; i++) {
-		/*
-		 * If there is a tree identifier for the submodule, add the
-		 * rev after adding the submodule options but before the
-		 * pathspecs.  To do this we listen for the '--' and insert the
-		 * oid before pushing the '--' onto the child process argv
-		 * array.
-		 */
-		if (gs->identifier &&
-		    !strcmp("--", submodule_options.argv[i])) {
-			argv_array_push(&cp.args, oid_to_hex(gs->identifier));
-		}
+	if (oid) {
+		struct object *object;
+		struct tree_desc tree;
+		void *data;
+		unsigned long size;
+		struct strbuf base = STRBUF_INIT;
 
-		argv_array_push(&cp.args, submodule_options.argv[i]);
-	}
+		object = parse_object_or_die(oid, oid_to_hex(oid));
 
-	cp.git_cmd = 1;
-	cp.dir = gs->path;
+		grep_read_lock();
+		data = read_object_with_reference(object->oid.hash, tree_type,
+						  &size, NULL);
+		grep_read_unlock();
 
-	/*
-	 * Capture output to output buffer and check the return code from the
-	 * child process.  A '0' indicates a hit, a '1' indicates no hit and
-	 * anything else is an error.
-	 */
-	status = capture_command(&cp, &child_output, 0);
-	if (status && (status != 1)) {
-		/* flush the buffer */
-		write_or_die(1, child_output.buf, child_output.len);
-		die("process for submodule '%s' failed with exit code: %d",
-		    gs->name, status);
-	}
+		if (!data)
+			die(_("unable to read tree (%s)"), oid_to_hex(&object->oid));
 
-	opt->output(opt, child_output.buf, child_output.len);
-	strbuf_release(&child_output);
-	/* invert the return code to make a hit equal to 1 */
-	return !status;
-}
+		strbuf_addstr(&base, filename);
+		strbuf_addch(&base, '/');
 
-/*
- * Prep grep structures for a submodule grep
- * oid: the oid of the submodule or NULL if using the working tree
- * filename: name of the submodule including tree name of parent
- * path: location of the submodule
- */
-static int grep_submodule(struct grep_opt *opt, const struct object_id *oid,
-			  const char *filename, const char *path)
-{
-	if (!is_submodule_active(the_repository, path))
-		return 0;
-	if (!is_submodule_populated_gently(path, NULL)) {
-		/*
-		 * If searching history, check for the presence of the
-		 * submodule's gitdir before skipping the submodule.
-		 */
-		if (oid) {
-			const struct submodule *sub =
-					submodule_from_path(&null_oid, path);
-			if (sub)
-				path = git_path("modules/%s", sub->name);
-
-			if (!(is_directory(path) && is_git_directory(path)))
-				return 0;
-		} else {
-			return 0;
-		}
+		init_tree_desc(&tree, data, size);
+		hit = grep_tree(opt, pathspec, &tree, &base, base.len,
+				object->type == OBJ_COMMIT, &submodule);
+		strbuf_release(&base);
+		free(data);
+	} else {
+		hit = grep_cache(opt, &submodule, pathspec, 1);
 	}
 
-#ifndef NO_PTHREADS
-	if (num_threads) {
-		add_work(opt, GREP_SOURCE_SUBMODULE, filename, path, oid);
-		return 0;
-	} else
-#endif
-	{
-		struct grep_source gs;
-		int hit;
-
-		grep_source_init(&gs, GREP_SOURCE_SUBMODULE,
-				 filename, path, oid);
-		hit = grep_submodule_launch(opt, &gs);
-
-		grep_source_clear(&gs);
-		return hit;
-	}
+	repo_clear(&submodule);
+	return hit;
 }
 
-static int grep_cache(struct grep_opt *opt, const struct pathspec *pathspec,
-		      int cached)
+static int grep_cache(struct grep_opt *opt, struct repository *repo,
+		      const struct pathspec *pathspec, int cached)
 {
 	int hit = 0;
 	int nr;
 	struct strbuf name = STRBUF_INIT;
 	int name_base_len = 0;
-	if (super_prefix) {
-		name_base_len = strlen(super_prefix);
-		strbuf_addstr(&name, super_prefix);
+	if (repo->submodule_prefix) {
+		name_base_len = strlen(repo->submodule_prefix);
+		strbuf_addstr(&name, repo->submodule_prefix);
 	}
 
-	read_cache();
+	repo_read_index(repo);
 
-	for (nr = 0; nr < active_nr; nr++) {
-		const struct cache_entry *ce = active_cache[nr];
+	for (nr = 0; nr < repo->index->cache_nr; nr++) {
+		const struct cache_entry *ce = repo->index->cache[nr];
 		strbuf_setlen(&name, name_base_len);
 		strbuf_addstr(&name, ce->name);
 
@@ -715,14 +498,14 @@ static int grep_cache(struct grep_opt *opt, const struct pathspec *pathspec,
 			    ce_skip_worktree(ce)) {
 				if (ce_stage(ce) || ce_intent_to_add(ce))
 					continue;
-				hit |= grep_oid(opt, &ce->oid, ce->name,
-						 0, ce->name);
+				hit |= grep_oid(opt, &ce->oid, name.buf,
+						 0, name.buf);
 			} else {
-				hit |= grep_file(opt, ce->name);
+				hit |= grep_file(opt, name.buf);
 			}
 		} else if (recurse_submodules && S_ISGITLINK(ce->ce_mode) &&
 			   submodule_path_match(pathspec, name.buf, NULL)) {
-			hit |= grep_submodule(opt, NULL, ce->name, ce->name);
+			hit |= grep_submodule(opt, repo, pathspec, NULL, ce->name, ce->name);
 		} else {
 			continue;
 		}
@@ -730,8 +513,8 @@ static int grep_cache(struct grep_opt *opt, const struct pathspec *pathspec,
 		if (ce_stage(ce)) {
 			do {
 				nr++;
-			} while (nr < active_nr &&
-				 !strcmp(ce->name, active_cache[nr]->name));
+			} while (nr < repo->index->cache_nr &&
+				 !strcmp(ce->name, repo->index->cache[nr]->name));
 			nr--; /* compensate for loop control */
 		}
 		if (hit && opt->status_only)
@@ -744,7 +527,7 @@ static int grep_cache(struct grep_opt *opt, const struct pathspec *pathspec,
 
 static int grep_tree(struct grep_opt *opt, const struct pathspec *pathspec,
 		     struct tree_desc *tree, struct strbuf *base, int tn_len,
-		     int check_attr)
+		     int check_attr, struct repository *repo)
 {
 	int hit = 0;
 	enum interesting match = entry_not_interesting;
@@ -752,8 +535,8 @@ static int grep_tree(struct grep_opt *opt, const struct pathspec *pathspec,
 	int old_baselen = base->len;
 	struct strbuf name = STRBUF_INIT;
 	int name_base_len = 0;
-	if (super_prefix) {
-		strbuf_addstr(&name, super_prefix);
+	if (repo->submodule_prefix) {
+		strbuf_addstr(&name, repo->submodule_prefix);
 		name_base_len = name.len;
 	}
 
@@ -791,11 +574,11 @@ static int grep_tree(struct grep_opt *opt, const struct pathspec *pathspec,
 			strbuf_addch(base, '/');
 			init_tree_desc(&sub, data, size);
 			hit |= grep_tree(opt, pathspec, &sub, base, tn_len,
-					 check_attr);
+					 check_attr, repo);
 			free(data);
 		} else if (recurse_submodules && S_ISGITLINK(entry.mode)) {
-			hit |= grep_submodule(opt, entry.oid, base->buf,
-					      base->buf + tn_len);
+			hit |= grep_submodule(opt, repo, pathspec, entry.oid,
+					      base->buf, base->buf + tn_len);
 		}
 
 		strbuf_setlen(base, old_baselen);
@@ -809,7 +592,8 @@ static int grep_tree(struct grep_opt *opt, const struct pathspec *pathspec,
 }
 
 static int grep_object(struct grep_opt *opt, const struct pathspec *pathspec,
-		       struct object *obj, const char *name, const char *path)
+		       struct object *obj, const char *name, const char *path,
+		       struct repository *repo)
 {
 	if (obj->type == OBJ_BLOB)
 		return grep_oid(opt, &obj->oid, name, 0, path);
@@ -828,10 +612,6 @@ static int grep_object(struct grep_opt *opt, const struct pathspec *pathspec,
 		if (!data)
 			die(_("unable to read tree (%s)"), oid_to_hex(&obj->oid));
 
-		/* Use parent's name as base when recursing submodules */
-		if (recurse_submodules && parent_basename)
-			name = parent_basename;
-
 		len = name ? strlen(name) : 0;
 		strbuf_init(&base, PATH_MAX + len + 1);
 		if (len) {
@@ -840,7 +620,7 @@ static int grep_object(struct grep_opt *opt, const struct pathspec *pathspec,
 		}
 		init_tree_desc(&tree, data, size);
 		hit = grep_tree(opt, pathspec, &tree, &base, base.len,
-				obj->type == OBJ_COMMIT);
+				obj->type == OBJ_COMMIT, repo);
 		strbuf_release(&base);
 		free(data);
 		return hit;
@@ -849,6 +629,7 @@ static int grep_object(struct grep_opt *opt, const struct pathspec *pathspec,
 }
 
 static int grep_objects(struct grep_opt *opt, const struct pathspec *pathspec,
+			struct repository *repo,
 			const struct object_array *list)
 {
 	unsigned int i;
@@ -864,7 +645,8 @@ static int grep_objects(struct grep_opt *opt, const struct pathspec *pathspec,
 			submodule_free();
 			gitmodules_config_oid(&real_obj->oid);
 		}
-		if (grep_object(opt, pathspec, real_obj, list->objects[i].name, list->objects[i].path)) {
+		if (grep_object(opt, pathspec, real_obj, list->objects[i].name, list->objects[i].path,
+				repo)) {
 			hit = 1;
 			if (opt->status_only)
 				break;
@@ -1005,9 +787,6 @@ int cmd_grep(int argc, const char **argv, const char *prefix)
 			    N_("ignore files specified via '.gitignore'"), 1),
 		OPT_BOOL(0, "recurse-submodules", &recurse_submodules,
 			 N_("recursively search in each submodule")),
-		OPT_STRING(0, "parent-basename", &parent_basename,
-			   N_("basename"),
-			   N_("prepend parent project's basename to output")),
 		OPT_GROUP(""),
 		OPT_BOOL('v', "invert-match", &opt.invert,
 			N_("show non-matching lines")),
@@ -1112,7 +891,6 @@ int cmd_grep(int argc, const char **argv, const char *prefix)
 	init_grep_defaults();
 	git_config(grep_cmd_config, NULL);
 	grep_init(&opt, prefix);
-	super_prefix = get_super_prefix();
 
 	/*
 	 * If there is no -- then the paths must exist in the working
@@ -1272,9 +1050,6 @@ int cmd_grep(int argc, const char **argv, const char *prefix)
 
 	if (recurse_submodules) {
 		gitmodules_config();
-		compile_submodule_options(&opt, argv + i, cached, untracked,
-					  opt_exclude, use_index,
-					  pattern_type_arg);
 	}
 
 	if (show_in_pager && (cached || list.nr))
@@ -1318,11 +1093,12 @@ int cmd_grep(int argc, const char **argv, const char *prefix)
 		if (!cached)
 			setup_work_tree();
 
-		hit = grep_cache(&opt, &pathspec, cached);
+		hit = grep_cache(&opt, the_repository, &pathspec, cached);
 	} else {
 		if (cached)
 			die(_("both --cached and trees are given."));
-		hit = grep_objects(&opt, &pathspec, &list);
+
+		hit = grep_objects(&opt, &pathspec, the_repository, &list);
 	}
 
 	if (num_threads)
diff --git a/builtin/mv.c b/builtin/mv.c
index dcf6736b5..94fbaaa5d 100644
--- a/builtin/mv.c
+++ b/builtin/mv.c
@@ -81,7 +81,7 @@ static void prepare_move_submodule(const char *src, int first,
 	struct strbuf submodule_dotgit = STRBUF_INIT;
 	if (!S_ISGITLINK(active_cache[first]->ce_mode))
 		die(_("Directory %s is in index and no submodule?"), src);
-	if (!is_staging_gitmodules_ok())
+	if (!is_staging_gitmodules_ok(&the_index))
 		die(_("Please stage your changes to .gitmodules or stash them to proceed"));
 	strbuf_addf(&submodule_dotgit, "%s/.git", src);
 	*submodule_gitfile = read_gitfile(submodule_dotgit.buf);
diff --git a/builtin/rm.c b/builtin/rm.c
index 52826d137..4057e73fa 100644
--- a/builtin/rm.c
+++ b/builtin/rm.c
@@ -286,7 +286,7 @@ int cmd_rm(int argc, const char **argv, const char *prefix)
 		list.entry[list.nr].name = xstrdup(ce->name);
 		list.entry[list.nr].is_submodule = S_ISGITLINK(ce->ce_mode);
 		if (list.entry[list.nr++].is_submodule &&
-		    !is_staging_gitmodules_ok())
+		    !is_staging_gitmodules_ok(&the_index))
 			die (_("Please stage your changes to .gitmodules or stash them to proceed"));
 	}
 
diff --git a/builtin/submodule--helper.c b/builtin/submodule--helper.c
index 353e884d8..0ff9dd0b8 100644
--- a/builtin/submodule--helper.c
+++ b/builtin/submodule--helper.c
@@ -960,10 +960,19 @@ static int update_clone_task_finished(int result,
 	return 0;
 }
 
+static int gitmodules_update_clone_config(const char *var, const char *value,
+					  void *cb)
+{
+	int *max_jobs = cb;
+	if (!strcmp(var, "submodule.fetchjobs"))
+		*max_jobs = parse_submodule_fetchjobs(var, value);
+	return 0;
+}
+
 static int update_clone(int argc, const char **argv, const char *prefix)
 {
 	const char *update = NULL;
-	int max_jobs = -1;
+	int max_jobs = 1;
 	struct string_list_item *item;
 	struct pathspec pathspec;
 	struct submodule_update_clone suc = SUBMODULE_UPDATE_CLONE_INIT;
@@ -1000,6 +1009,9 @@ static int update_clone(int argc, const char **argv, const char *prefix)
 	};
 	suc.prefix = prefix;
 
+	config_from_gitmodules(gitmodules_update_clone_config, &max_jobs);
+	git_config(gitmodules_update_clone_config, &max_jobs);
+
 	argc = parse_options(argc, argv, prefix, module_update_clone_options,
 			     git_submodule_helper_usage, 0);
 
@@ -1017,9 +1029,6 @@ static int update_clone(int argc, const char **argv, const char *prefix)
 	gitmodules_config();
 	git_config(submodule_config, NULL);
 
-	if (max_jobs < 0)
-		max_jobs = parallel_submodules();
-
 	run_processes_parallel(max_jobs,
 			       update_clone_get_next_task,
 			       update_clone_start_failure,
diff --git a/cache.h b/cache.h
index 1c69d2a05..3c44a25ff 100644
--- a/cache.h
+++ b/cache.h
@@ -417,7 +417,6 @@ static inline enum object_type object_type(unsigned int mode)
 #define GIT_WORK_TREE_ENVIRONMENT "GIT_WORK_TREE"
 #define GIT_PREFIX_ENVIRONMENT "GIT_PREFIX"
 #define GIT_SUPER_PREFIX_ENVIRONMENT "GIT_INTERNAL_SUPER_PREFIX"
-#define GIT_TOPLEVEL_PREFIX_ENVIRONMENT "GIT_INTERNAL_TOPLEVEL_PREFIX"
 #define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
 #define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
 #define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
@@ -433,6 +432,7 @@ static inline enum object_type object_type(unsigned int mode)
 #define GITATTRIBUTES_FILE ".gitattributes"
 #define INFOATTRIBUTES_FILE "info/attributes"
 #define ATTRIBUTE_MACRO_PREFIX "[attr]"
+#define GITMODULES_FILE ".gitmodules"
 #define GIT_NOTES_REF_ENVIRONMENT "GIT_NOTES_REF"
 #define GIT_NOTES_DEFAULT_REF "refs/notes/commits"
 #define GIT_NOTES_DISPLAY_REF_ENVIRONMENT "GIT_NOTES_DISPLAY_REF"
diff --git a/config.c b/config.c
index 9ec8c4488..c1450732d 100644
--- a/config.c
+++ b/config.c
@@ -2059,6 +2059,23 @@ int git_config_get_pathname(const char *key, const char **dest)
 	return repo_config_get_pathname(the_repository, key, dest);
 }
 
+/*
+ * Note: This function exists solely to maintain backward compatibility with
+ * 'fetch' and 'update_clone' storing configuration in '.gitmodules' and should
+ * NOT be used anywhere else.
+ *
+ * Runs the provided config function on the '.gitmodules' file found in the
+ * working directory.
+ */
+void config_from_gitmodules(config_fn_t fn, void *data)
+{
+	if (the_repository->worktree) {
+		char *file = repo_worktree_path(the_repository, GITMODULES_FILE);
+		git_config_from_file(fn, file, data);
+		free(file);
+	}
+}
+
 int git_config_get_expiry(const char *key, const char **output)
 {
 	int ret = git_config_get_string_const(key, output);
diff --git a/config.h b/config.h
index 827f2b0e4..18b6f3f72 100644
--- a/config.h
+++ b/config.h
@@ -187,6 +187,16 @@ extern int repo_config_get_maybe_bool(struct repository *repo,
 extern int repo_config_get_pathname(struct repository *repo,
 				    const char *key, const char **dest);
 
+/*
+ * Note: This function exists solely to maintain backward compatibility with
+ * 'fetch' and 'update_clone' storing configuration in '.gitmodules' and should
+ * NOT be used anywhere else.
+ *
+ * Runs the provided config function on the '.gitmodules' file found in the
+ * working directory.
+ */
+extern void config_from_gitmodules(config_fn_t fn, void *data);
+
 extern int git_config_get_value(const char *key, const char **value);
 extern const struct string_list *git_config_get_value_multi(const char *key);
 extern void git_config_clear(void);
diff --git a/git.c b/git.c
index 6b6d9f68e..f31dca696 100644
--- a/git.c
+++ b/git.c
@@ -404,7 +404,7 @@ static struct cmd_struct commands[] = {
 	{ "fsck-objects", cmd_fsck, RUN_SETUP },
 	{ "gc", cmd_gc, RUN_SETUP },
 	{ "get-tar-commit-id", cmd_get_tar_commit_id },
-	{ "grep", cmd_grep, RUN_SETUP_GENTLY | SUPPORT_SUPER_PREFIX },
+	{ "grep", cmd_grep, RUN_SETUP_GENTLY },
 	{ "hash-object", cmd_hash_object },
 	{ "help", cmd_help },
 	{ "index-pack", cmd_index_pack, RUN_SETUP_GENTLY },
diff --git a/grep.c b/grep.c
index 2efec0e18..45acd333b 100644
--- a/grep.c
+++ b/grep.c
@@ -1927,16 +1927,6 @@ void grep_source_init(struct grep_source *gs, enum grep_source_type type,
 	case GREP_SOURCE_FILE:
 		gs->identifier = xstrdup(identifier);
 		break;
-	case GREP_SOURCE_SUBMODULE:
-		if (!identifier) {
-			gs->identifier = NULL;
-			break;
-		}
-		/*
-		 * FALL THROUGH
-		 * If the identifier is non-NULL (in the submodule case) it
-		 * will be a SHA1 that needs to be copied.
-		 */
 	case GREP_SOURCE_OID:
 		gs->identifier = oiddup(identifier);
 		break;
@@ -1959,7 +1949,6 @@ void grep_source_clear_data(struct grep_source *gs)
 	switch (gs->type) {
 	case GREP_SOURCE_FILE:
 	case GREP_SOURCE_OID:
-	case GREP_SOURCE_SUBMODULE:
 		FREE_AND_NULL(gs->buf);
 		gs->size = 0;
 		break;
@@ -2030,8 +2019,6 @@ static int grep_source_load(struct grep_source *gs)
 		return grep_source_load_oid(gs);
 	case GREP_SOURCE_BUF:
 		return gs->buf ? 0 : -1;
-	case GREP_SOURCE_SUBMODULE:
-		break;
 	}
 	die("BUG: invalid grep_source type to load");
 }
diff --git a/grep.h b/grep.h
index 0c091e510..52aecfab6 100644
--- a/grep.h
+++ b/grep.h
@@ -193,7 +193,6 @@ struct grep_source {
 		GREP_SOURCE_OID,
 		GREP_SOURCE_FILE,
 		GREP_SOURCE_BUF,
-		GREP_SOURCE_SUBMODULE,
 	} type;
 	void *identifier;
 
diff --git a/repository.c b/repository.c
index 161746756..f107af7d7 100644
--- a/repository.c
+++ b/repository.c
@@ -4,7 +4,9 @@
 #include "submodule-config.h"
 
 /* The main repository */
-static struct repository the_repo;
+static struct repository the_repo = {
+	NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, &the_index, 0, 0
+};
 struct repository *the_repository = &the_repo;
 
 static char *git_path_from_env(const char *envvar, const char *git_dir,
@@ -235,8 +237,6 @@ int repo_read_index(struct repository *repo)
 {
 	if (!repo->index)
 		repo->index = xcalloc(1, sizeof(*repo->index));
-	else
-		discard_index(repo->index);
 
 	return read_index_from(repo->index, repo->index_file);
 }
diff --git a/repository.h b/repository.h
index 417787f3e..7f5e24a0a 100644
--- a/repository.h
+++ b/repository.h
@@ -92,6 +92,14 @@ extern int repo_submodule_init(struct repository *submodule,
 			       const char *path);
 extern void repo_clear(struct repository *repo);
 
+/*
+ * Populates the repository's index from its index_file, an index struct will
+ * be allocated if needed.
+ *
+ * Return the number of index entries in the populated index or a value less
+ * than zero if an error occured.  If the repository's index has already been
+ * populated then the number of entries will simply be returned.
+ */
 extern int repo_read_index(struct repository *repo);
 
 #endif /* REPOSITORY_H */
diff --git a/setup.c b/setup.c
index 860507e1f..23950173f 100644
--- a/setup.c
+++ b/setup.c
@@ -1027,7 +1027,7 @@ const char *setup_git_directory_gently(int *nongit_ok)
 {
 	static struct strbuf cwd = STRBUF_INIT;
 	struct strbuf dir = STRBUF_INIT, gitdir = STRBUF_INIT;
-	const char *prefix, *env_prefix;
+	const char *prefix;
 
 	/*
 	 * We may have read an incomplete configuration before
@@ -1085,16 +1085,6 @@ const char *setup_git_directory_gently(int *nongit_ok)
 		die("BUG: unhandled setup_git_directory_1() result");
 	}
 
-	/*
-	 * NEEDSWORK: This was a hack in order to get ls-files and grep to have
-	 * properly formated output when recursing submodules.  Once ls-files
-	 * and grep have been changed to perform this recursing in-process this
-	 * needs to be removed.
-	 */
-	env_prefix = getenv(GIT_TOPLEVEL_PREFIX_ENVIRONMENT);
-	if (env_prefix)
-		prefix = env_prefix;
-
 	if (prefix)
 		setenv(GIT_PREFIX_ENVIRONMENT, prefix, 1);
 	else
diff --git a/submodule-config.c b/submodule-config.c
index bede338c8..2b83c2319 100644
--- a/submodule-config.c
+++ b/submodule-config.c
@@ -254,6 +254,14 @@ static int parse_fetch_recurse(const char *opt, const char *arg,
 	}
 }
 
+int parse_submodule_fetchjobs(const char *var, const char *value)
+{
+	int fetchjobs = git_config_int(var, value);
+	if (fetchjobs < 0)
+		die(_("negative values not allowed for submodule.fetchjobs"));
+	return fetchjobs;
+}
+
 int parse_fetch_recurse_submodules_arg(const char *opt, const char *arg)
 {
 	return parse_fetch_recurse(opt, arg, 1);
diff --git a/submodule-config.h b/submodule-config.h
index 4ffa2fa84..cccd34b92 100644
--- a/submodule-config.h
+++ b/submodule-config.h
@@ -27,6 +27,7 @@ struct repository;
 
 extern void submodule_cache_free(struct submodule_cache *cache);
 
+extern int parse_submodule_fetchjobs(const char *var, const char *value);
 extern int parse_fetch_recurse_submodules_arg(const char *opt, const char *arg);
 struct option;
 extern int option_fetch_parse_recurse_submodules(const struct option *opt,
diff --git a/submodule.c b/submodule.c
index 6ba15b413..e072036e7 100644
--- a/submodule.c
+++ b/submodule.c
@@ -20,37 +20,53 @@
 #include "worktree.h"
 #include "parse-options.h"
 
-static int config_fetch_recurse_submodules = RECURSE_SUBMODULES_ON_DEMAND;
 static int config_update_recurse_submodules = RECURSE_SUBMODULES_OFF;
-static int parallel_jobs = 1;
 static struct string_list changed_submodule_paths = STRING_LIST_INIT_DUP;
 static int initialized_fetch_ref_tips;
 static struct oid_array ref_tips_before_fetch;
 static struct oid_array ref_tips_after_fetch;
 
 /*
- * The following flag is set if the .gitmodules file is unmerged. We then
- * disable recursion for all submodules where .git/config doesn't have a
- * matching config entry because we can't guess what might be configured in
- * .gitmodules unless the user resolves the conflict. When a command line
- * option is given (which always overrides configuration) this flag will be
- * ignored.
+ * Check if the .gitmodules file is unmerged. Parsing of the .gitmodules file
+ * will be disabled because we can't guess what might be configured in
+ * .gitmodules unless the user resolves the conflict.
  */
-static int gitmodules_is_unmerged;
+int is_gitmodules_unmerged(const struct index_state *istate)
+{
+	int pos = index_name_pos(istate, GITMODULES_FILE, strlen(GITMODULES_FILE));
+	if (pos < 0) { /* .gitmodules not found or isn't merged */
+		pos = -1 - pos;
+		if (istate->cache_nr > pos) {  /* there is a .gitmodules */
+			const struct cache_entry *ce = istate->cache[pos];
+			if (ce_namelen(ce) == strlen(GITMODULES_FILE) &&
+			    !strcmp(ce->name, GITMODULES_FILE))
+				return 1;
+		}
+	}
+
+	return 0;
+}
 
 /*
- * This flag is set if the .gitmodules file had unstaged modifications on
- * startup. This must be checked before allowing modifications to the
- * .gitmodules file with the intention to stage them later, because when
- * continuing we would stage the modifications the user didn't stage herself
- * too. That might change in a future version when we learn to stage the
- * changes we do ourselves without staging any previous modifications.
+ * Check if the .gitmodules file has unstaged modifications.  This must be
+ * checked before allowing modifications to the .gitmodules file with the
+ * intention to stage them later, because when continuing we would stage the
+ * modifications the user didn't stage herself too. That might change in a
+ * future version when we learn to stage the changes we do ourselves without
+ * staging any previous modifications.
  */
-static int gitmodules_is_modified;
-
-int is_staging_gitmodules_ok(void)
+int is_staging_gitmodules_ok(const struct index_state *istate)
 {
-	return !gitmodules_is_modified;
+	int pos = index_name_pos(istate, GITMODULES_FILE, strlen(GITMODULES_FILE));
+
+	if ((pos >= 0) && (pos < istate->cache_nr)) {
+		struct stat st;
+		if (lstat(GITMODULES_FILE, &st) == 0 &&
+		    ce_match_stat(istate->cache[pos], &st, 0) & DATA_CHANGED)
+			return 0;
+	}
+
+	return 1;
 }
 
 /*
@@ -63,10 +79,10 @@ int update_path_in_gitmodules(const char *oldpath, const char *newpath)
 	struct strbuf entry = STRBUF_INIT;
 	const struct submodule *submodule;
 
-	if (!file_exists(".gitmodules")) /* Do nothing without .gitmodules */
+	if (!file_exists(GITMODULES_FILE)) /* Do nothing without .gitmodules */
 		return -1;
 
-	if (gitmodules_is_unmerged)
+	if (is_gitmodules_unmerged(&the_index))
 		die(_("Cannot change unmerged .gitmodules, resolve merge conflicts first"));
 
 	submodule = submodule_from_path(&null_oid, oldpath);
@@ -77,7 +93,7 @@ int update_path_in_gitmodules(const char *oldpath, const char *newpath)
 	strbuf_addstr(&entry, "submodule.");
 	strbuf_addstr(&entry, submodule->name);
 	strbuf_addstr(&entry, ".path");
-	if (git_config_set_in_file_gently(".gitmodules", entry.buf, newpath) < 0) {
+	if (git_config_set_in_file_gently(GITMODULES_FILE, entry.buf, newpath) < 0) {
 		/* Maybe the user already did that, don't error out here */
 		warning(_("Could not update .gitmodules entry %s"), entry.buf);
 		strbuf_release(&entry);
@@ -97,10 +113,10 @@ int remove_path_from_gitmodules(const char *path)
 	struct strbuf sect = STRBUF_INIT;
 	const struct submodule *submodule;
 
-	if (!file_exists(".gitmodules")) /* Do nothing without .gitmodules */
+	if (!file_exists(GITMODULES_FILE)) /* Do nothing without .gitmodules */
 		return -1;
 
-	if (gitmodules_is_unmerged)
+	if (is_gitmodules_unmerged(&the_index))
 		die(_("Cannot change unmerged .gitmodules, resolve merge conflicts first"));
 
 	submodule = submodule_from_path(&null_oid, path);
@@ -110,7 +126,7 @@ int remove_path_from_gitmodules(const char *path)
 	}
 	strbuf_addstr(&sect, "submodule.");
 	strbuf_addstr(&sect, submodule->name);
-	if (git_config_rename_section_in_file(".gitmodules", sect.buf, NULL) < 0) {
+	if (git_config_rename_section_in_file(GITMODULES_FILE, sect.buf, NULL) < 0) {
 		/* Maybe the user already did that, don't error out here */
 		warning(_("Could not remove .gitmodules entry for %s"), path);
 		strbuf_release(&sect);
@@ -122,7 +138,7 @@ int remove_path_from_gitmodules(const char *path)
 
 void stage_updated_gitmodules(void)
 {
-	if (add_file_to_cache(".gitmodules", 0))
+	if (add_file_to_cache(GITMODULES_FILE, 0))
 		die(_("staging updated .gitmodules failed"));
 }
 
@@ -151,7 +167,7 @@ void set_diffopt_flags_from_submodule_config(struct diff_options *diffopt,
 	if (submodule) {
 		if (submodule->ignore)
 			handle_ignore_submodules_arg(diffopt, submodule->ignore);
-		else if (gitmodules_is_unmerged)
+		else if (is_gitmodules_unmerged(&the_index))
 			DIFF_OPT_SET(diffopt, IGNORE_SUBMODULES);
 	}
 }
@@ -159,17 +175,8 @@ void set_diffopt_flags_from_submodule_config(struct diff_options *diffopt,
 /* For loading from the .gitmodules file. */
 static int git_modules_config(const char *var, const char *value, void *cb)
 {
-	if (!strcmp(var, "submodule.fetchjobs")) {
-		parallel_jobs = git_config_int(var, value);
-		if (parallel_jobs < 0)
-			die(_("negative values not allowed for submodule.fetchJobs"));
-		return 0;
-	} else if (starts_with(var, "submodule."))
+	if (starts_with(var, "submodule."))
 		return parse_submodule_config_option(var, value);
-	else if (!strcmp(var, "fetch.recursesubmodules")) {
-		config_fetch_recurse_submodules = parse_fetch_recurse_submodules_arg(var, value);
-		return 0;
-	}
 	return 0;
 }
 
@@ -223,39 +230,6 @@ void load_submodule_cache(void)
 	git_config(submodule_config, NULL);
 }
 
-void gitmodules_config(void)
-{
-	const char *work_tree = get_git_work_tree();
-	if (work_tree) {
-		struct strbuf gitmodules_path = STRBUF_INIT;
-		int pos;
-		strbuf_addstr(&gitmodules_path, work_tree);
-		strbuf_addstr(&gitmodules_path, "/.gitmodules");
-		if (read_cache() < 0)
-			die("index file corrupt");
-		pos = cache_name_pos(".gitmodules", 11);
-		if (pos < 0) { /* .gitmodules not found or isn't merged */
-			pos = -1 - pos;
-			if (active_nr > pos) {  /* there is a .gitmodules */
-				const struct cache_entry *ce = active_cache[pos];
-				if (ce_namelen(ce) == 11 &&
-				    !memcmp(ce->name, ".gitmodules", 11))
-					gitmodules_is_unmerged = 1;
-			}
-		} else if (pos < active_nr) {
-			struct stat st;
-			if (lstat(".gitmodules", &st) == 0 &&
-			    ce_match_stat(active_cache[pos], &st, 0) & DATA_CHANGED)
-				gitmodules_is_modified = 1;
-		}
-
-		if (!gitmodules_is_unmerged)
-			git_config_from_file(git_modules_config,
-				gitmodules_path.buf, NULL);
-		strbuf_release(&gitmodules_path);
-	}
-}
-
 static int gitmodules_cb(const char *var, const char *value, void *data)
 {
 	struct repository *repo = data;
@@ -264,10 +238,24 @@ static int gitmodules_cb(const char *var, const char *value, void *data)
 
 void repo_read_gitmodules(struct repository *repo)
 {
-	char *gitmodules_path = repo_worktree_path(repo, ".gitmodules");
+	if (repo->worktree) {
+		char *gitmodules;
+
+		if (repo_read_index(repo) < 0)
+			return;
 
-	git_config_from_file(gitmodules_cb, gitmodules_path, repo);
-	free(gitmodules_path);
+		gitmodules = repo_worktree_path(repo, GITMODULES_FILE);
+
+		if (!is_gitmodules_unmerged(repo->index))
+			git_config_from_file(gitmodules_cb, gitmodules, repo);
+
+		free(gitmodules);
+	}
+}
+
+void gitmodules_config(void)
+{
+	repo_read_gitmodules(the_repository);
 }
 
 void gitmodules_config_oid(const struct object_id *commit_oid)
@@ -720,11 +708,6 @@ done:
 		clear_commit_marks(right, ~0);
 }
 
-void set_config_fetch_recurse_submodules(int value)
-{
-	config_fetch_recurse_submodules = value;
-}
-
 int should_update_submodules(void)
 {
 	return config_update_recurse_submodules == RECURSE_SUBMODULES_ON;
@@ -1182,10 +1165,11 @@ struct submodule_parallel_fetch {
 	const char *work_tree;
 	const char *prefix;
 	int command_line_option;
+	int default_option;
 	int quiet;
 	int result;
 };
-#define SPF_INIT {0, ARGV_ARRAY_INIT, NULL, NULL, 0, 0, 0}
+#define SPF_INIT {0, ARGV_ARRAY_INIT, NULL, NULL, 0, 0, 0, 0}
 
 static int get_next_submodule(struct child_process *cp,
 			      struct strbuf *err, void *data, void **task_cb)
@@ -1223,10 +1207,9 @@ static int get_next_submodule(struct child_process *cp,
 					default_argv = "on-demand";
 				}
 			} else {
-				if ((config_fetch_recurse_submodules == RECURSE_SUBMODULES_OFF) ||
-				    gitmodules_is_unmerged)
+				if (spf->default_option == RECURSE_SUBMODULES_OFF)
 					continue;
-				if (config_fetch_recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND) {
+				if (spf->default_option == RECURSE_SUBMODULES_ON_DEMAND) {
 					if (!unsorted_string_list_lookup(&changed_submodule_paths, ce->name))
 						continue;
 					default_argv = "on-demand";
@@ -1293,6 +1276,7 @@ static int fetch_finish(int retvalue, struct strbuf *err,
 
 int fetch_populated_submodules(const struct argv_array *options,
 			       const char *prefix, int command_line_option,
+			       int default_option,
 			       int quiet, int max_parallel_jobs)
 {
 	int i;
@@ -1300,6 +1284,7 @@ int fetch_populated_submodules(const struct argv_array *options,
 
 	spf.work_tree = get_git_work_tree();
 	spf.command_line_option = command_line_option;
+	spf.default_option = default_option;
 	spf.quiet = quiet;
 	spf.prefix = prefix;
 
@@ -1315,9 +1300,6 @@ int fetch_populated_submodules(const struct argv_array *options,
 	argv_array_push(&spf.args, "--recurse-submodules-default");
 	/* default value, "--submodule-prefix" and its value are added later */
 
-	if (max_parallel_jobs < 0)
-		max_parallel_jobs = parallel_jobs;
-
 	calculate_changed_submodule_paths();
 	run_processes_parallel(max_parallel_jobs,
 			       get_next_submodule,
@@ -1837,11 +1819,6 @@ int merge_submodule(struct object_id *result, const char *path,
 	return 0;
 }
 
-int parallel_submodules(void)
-{
-	return parallel_jobs;
-}
-
 /*
  * Embeds a single submodules git directory into the superprojects git dir,
  * non recursively.
diff --git a/submodule.h b/submodule.h
index f1aa3ffeb..e402b004f 100644
--- a/submodule.h
+++ b/submodule.h
@@ -33,7 +33,8 @@ struct submodule_update_strategy {
 };
 #define SUBMODULE_UPDATE_STRATEGY_INIT {SM_UPDATE_UNSPECIFIED, NULL}
 
-extern int is_staging_gitmodules_ok(void);
+extern int is_gitmodules_unmerged(const struct index_state *istate);
+extern int is_staging_gitmodules_ok(const struct index_state *istate);
 extern int update_path_in_gitmodules(const char *oldpath, const char *newpath);
 extern int remove_path_from_gitmodules(const char *path);
 extern void stage_updated_gitmodules(void);
@@ -76,7 +77,6 @@ extern void show_submodule_inline_diff(FILE *f, const char *path,
 		unsigned dirty_submodule, const char *meta,
 		const char *del, const char *add, const char *reset,
 		const struct diff_options *opt);
-extern void set_config_fetch_recurse_submodules(int value);
 /* Check if we want to update any submodule.*/
 extern int should_update_submodules(void);
 /*
@@ -87,6 +87,7 @@ extern const struct submodule *submodule_from_ce(const struct cache_entry *ce);
 extern void check_for_new_submodule_commits(struct object_id *oid);
 extern int fetch_populated_submodules(const struct argv_array *options,
 			       const char *prefix, int command_line_option,
+			       int default_option,
 			       int quiet, int max_parallel_jobs);
 extern unsigned is_submodule_modified(const char *path, int ignore_untracked);
 extern int submodule_uses_gitfile(const char *path);
@@ -112,7 +113,6 @@ extern int push_unpushed_submodules(struct oid_array *commits,
 				    const struct string_list *push_options,
 				    int dry_run);
 extern void connect_work_tree_and_git_dir(const char *work_tree, const char *git_dir);
-extern int parallel_submodules(void);
 /*
  * Given a submodule path (as in the index), return the repository
  * path of that submodule in 'buf'. Return -1 on error or when the
diff --git a/unpack-trees.c b/unpack-trees.c
index 862cfce66..38000ac8f 100644
--- a/unpack-trees.c
+++ b/unpack-trees.c
@@ -286,7 +286,7 @@ static void reload_gitmodules_file(struct index_state *index,
 	for (i = 0; i < index->cache_nr; i++) {
 		struct cache_entry *ce = index->cache[i];
 		if (ce->ce_flags & CE_UPDATE) {
-			int r = strcmp(ce->name, ".gitmodules");
+			int r = strcmp(ce->name, GITMODULES_FILE);
 			if (r < 0)
 				continue;
 			else if (r == 0) {