This enables submodule_from_{name, path} to handle arbitrary repositories.
All callers just pass in the_repository, a later patch will pass in other
repos.

Signed-off-by: Stefan Beller <sbel...@google.com>
---
 builtin/submodule--helper.c      | 14 +++++++-------
 submodule-config.c               | 14 ++++++++------
 submodule-config.h               |  4 ++--
 submodule.c                      | 30 ++++++++++++++++--------------
 t/helper/test-submodule-config.c |  6 ++++--
 5 files changed, 37 insertions(+), 31 deletions(-)

diff --git a/builtin/submodule--helper.c b/builtin/submodule--helper.c
index ee020d4749..a921fbbf56 100644
--- a/builtin/submodule--helper.c
+++ b/builtin/submodule--helper.c
@@ -454,7 +454,7 @@ 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"),
@@ -621,7 +621,7 @@ 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);
 
@@ -741,7 +741,7 @@ 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 +772,7 @@ 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 +925,7 @@ 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;
@@ -1367,7 +1367,7 @@ 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,
@@ -1650,7 +1650,7 @@ 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;
 
diff --git a/submodule-config.c b/submodule-config.c
index a3efff1a34..4b7803e6ed 100644
--- a/submodule-config.c
+++ b/submodule-config.c
@@ -619,18 +619,20 @@ static void gitmodules_read_check(struct repository *repo)
                repo_read_gitmodules(repo);
 }
 
-const struct submodule *submodule_from_name(const struct object_id 
*treeish_name,
+const struct submodule *submodule_from_name(struct repository *r,
+                                           const struct object_id 
*treeish_name,
                const char *name)
 {
-       gitmodules_read_check(the_repository);
-       return config_from(the_repository->submodule_cache, treeish_name, name, 
lookup_name);
+       gitmodules_read_check(r);
+       return config_from(r->submodule_cache, treeish_name, name, lookup_name);
 }
 
-const struct submodule *submodule_from_path(const struct object_id 
*treeish_name,
+const struct submodule *submodule_from_path(struct repository *r,
+                                           const struct object_id 
*treeish_name,
                const char *path)
 {
-       gitmodules_read_check(the_repository);
-       return config_from(the_repository->submodule_cache, treeish_name, path, 
lookup_path);
+       gitmodules_read_check(r);
+       return config_from(r->submodule_cache, treeish_name, path, lookup_path);
 }
 
 const struct submodule *submodule_from_cache(struct repository *repo,
diff --git a/submodule-config.h b/submodule-config.h
index df6bd6e6db..ff3c9e0b5c 100644
--- a/submodule-config.h
+++ b/submodule-config.h
@@ -39,9 +39,9 @@ extern int parse_update_recurse_submodules_arg(const char 
*opt, const char *arg)
 extern int parse_push_recurse_submodules_arg(const char *opt, const char *arg);
 extern void repo_read_gitmodules(struct repository *repo);
 extern void gitmodules_config_oid(const struct object_id *commit_oid);
-extern const struct submodule *submodule_from_name(
+extern const struct submodule *submodule_from_name(struct repository *r,
                const struct object_id *commit_or_tree, const char *name);
-extern const struct submodule *submodule_from_path(
+extern const struct submodule *submodule_from_path(struct repository *r,
                const struct object_id *commit_or_tree, const char *path);
 extern const struct submodule *submodule_from_cache(struct repository *repo,
                                                    const struct object_id 
*treeish_name,
diff --git a/submodule.c b/submodule.c
index 12a2503fda..e94b7f9acd 100644
--- a/submodule.c
+++ b/submodule.c
@@ -95,7 +95,7 @@ int update_path_in_gitmodules(const char *oldpath, const char 
*newpath)
        if (is_gitmodules_unmerged(&the_index))
                die(_("Cannot change unmerged .gitmodules, resolve merge 
conflicts first"));
 
-       submodule = submodule_from_path(&null_oid, oldpath);
+       submodule = submodule_from_path(the_repository, &null_oid, oldpath);
        if (!submodule || !submodule->name) {
                warning(_("Could not find section in .gitmodules where 
path=%s"), oldpath);
                return -1;
@@ -129,7 +129,7 @@ int remove_path_from_gitmodules(const char *path)
        if (is_gitmodules_unmerged(&the_index))
                die(_("Cannot change unmerged .gitmodules, resolve merge 
conflicts first"));
 
-       submodule = submodule_from_path(&null_oid, path);
+       submodule = submodule_from_path(the_repository, &null_oid, path);
        if (!submodule || !submodule->name) {
                warning(_("Could not find section in .gitmodules where 
path=%s"), path);
                return -1;
@@ -173,7 +173,8 @@ static int add_submodule_odb(const char *path)
 void set_diffopt_flags_from_submodule_config(struct diff_options *diffopt,
                                             const char *path)
 {
-       const struct submodule *submodule = submodule_from_path(&null_oid, 
path);
+       const struct submodule *submodule = submodule_from_path(the_repository,
+                                                               &null_oid, 
path);
        if (submodule) {
                const char *ignore;
                char *key;
@@ -673,7 +674,7 @@ const struct submodule *submodule_from_ce(const struct 
cache_entry *ce)
        if (!should_update_submodules())
                return NULL;
 
-       return submodule_from_path(&null_oid, ce->name);
+       return submodule_from_path(the_repository, &null_oid, ce->name);
 }
 
 static struct oid_array *submodule_commits(struct string_list *submodules,
@@ -730,13 +731,14 @@ static void collect_changed_submodules_cb(struct 
diff_queue_struct *q,
                if (!S_ISGITLINK(p->two->mode))
                        continue;
 
-               submodule = submodule_from_path(commit_oid, p->two->path);
+               submodule = submodule_from_path(the_repository,
+                                               commit_oid, p->two->path);
                if (submodule)
                        name = submodule->name;
                else {
                        name = default_name_or_path(p->two->path);
                        /* make sure name does not collide with existing one */
-                       submodule = submodule_from_name(commit_oid, name);
+                       submodule = submodule_from_name(the_repository, 
commit_oid, name);
                        if (submodule) {
                                warning("Submodule in commit %s at path: "
                                        "'%s' collides with a submodule named "
@@ -944,7 +946,7 @@ int find_unpushed_submodules(struct oid_array *commits,
                const struct submodule *submodule;
                const char *path = NULL;
 
-               submodule = submodule_from_name(&null_oid, name->string);
+               submodule = submodule_from_name(the_repository, &null_oid, 
name->string);
                if (submodule)
                        path = submodule->path;
                else
@@ -1112,7 +1114,7 @@ static void calculate_changed_submodule_paths(void)
        const struct string_list_item *name;
 
        /* No need to check if there are no submodules configured */
-       if (!submodule_from_path(NULL, NULL))
+       if (!submodule_from_path(the_repository, NULL, NULL))
                return;
 
        argv_array_push(&argv, "--"); /* argv[0] program name */
@@ -1133,7 +1135,7 @@ static void calculate_changed_submodule_paths(void)
                const struct submodule *submodule;
                const char *path = NULL;
 
-               submodule = submodule_from_name(&null_oid, name->string);
+               submodule = submodule_from_name(the_repository, &null_oid, 
name->string);
                if (submodule)
                        path = submodule->path;
                else
@@ -1161,7 +1163,7 @@ int submodule_touches_in_range(struct object_id *excl_oid,
        int ret;
 
        /* No need to check if there are no submodules configured */
-       if (!submodule_from_path(NULL, NULL))
+       if (!submodule_from_path(the_repository, NULL, NULL))
                return 0;
 
        argv_array_push(&args, "--"); /* args[0] program name */
@@ -1603,7 +1605,7 @@ int submodule_move_head(const char *path,
        if (old_head && !is_submodule_populated_gently(path, error_code_ptr))
                return 0;
 
-       sub = submodule_from_path(&null_oid, path);
+       sub = submodule_from_path(the_repository, &null_oid, path);
 
        if (!sub)
                die("BUG: could not get submodule information for '%s'", path);
@@ -1885,7 +1887,7 @@ static void 
relocate_single_git_dir_into_superproject(const char *prefix,
 
        real_old_git_dir = real_pathdup(old_git_dir, 1);
 
-       sub = submodule_from_path(&null_oid, path);
+       sub = submodule_from_path(the_repository, &null_oid, path);
        if (!sub)
                die(_("could not lookup name for submodule '%s'"), path);
 
@@ -1941,7 +1943,7 @@ void absorb_git_dir_into_superproject(const char *prefix,
                * superproject did not rewrite the git file links yet,
                * fix it now.
                */
-               sub = submodule_from_path(&null_oid, path);
+               sub = submodule_from_path(the_repository, &null_oid, path);
                if (!sub)
                        die(_("could not lookup name for submodule '%s'"), 
path);
                connect_work_tree_and_git_dir(path,
@@ -2087,7 +2089,7 @@ int submodule_to_gitdir(struct strbuf *buf, const char 
*submodule)
                strbuf_addstr(buf, git_dir);
        }
        if (!is_git_directory(buf->buf)) {
-               sub = submodule_from_path(&null_oid, submodule);
+               sub = submodule_from_path(the_repository, &null_oid, submodule);
                if (!sub) {
                        ret = -1;
                        goto cleanup;
diff --git a/t/helper/test-submodule-config.c b/t/helper/test-submodule-config.c
index 9971c5e9dd..e044871cee 100644
--- a/t/helper/test-submodule-config.c
+++ b/t/helper/test-submodule-config.c
@@ -48,9 +48,11 @@ int cmd_main(int argc, const char **argv)
                        die_usage(argc, argv, "Commit not found.");
 
                if (lookup_name) {
-                       submodule = submodule_from_name(&commit_oid, 
path_or_name);
+                       submodule = submodule_from_name(the_repository,
+                                                       &commit_oid, 
path_or_name);
                } else
-                       submodule = submodule_from_path(&commit_oid, 
path_or_name);
+                       submodule = submodule_from_path(the_repository,
+                                                       &commit_oid, 
path_or_name);
                if (!submodule)
                        die_usage(argc, argv, "Submodule not found.");
 
-- 
2.17.0.rc1.321.gba9d0f2565-goog

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