Merge branch 'js/regexec-buf' into maint

diff --git a/builtin/submodule--helper.c b/builtin/submodule--helper.c
index bd7cce65b951569c3d45ed23124794a099431f1f..e79790f0bdc9f19cb9d9773d1a9bdb10044bbb8d 100644 (file)
--- a/builtin/submodule--helper.c
+++ b/builtin/submodule--helper.c
@@ -444,8 +444,7 @@ static int module_name(int argc, const char **argv, const char *prefix)
 static int clone_submodule(const char *path, const char *gitdir, const char *url,
                           const char *depth, const char *reference, int quiet)
 {
-       struct child_process cp;
-       child_process_init(&cp);
+       struct child_process cp = CHILD_PROCESS_INIT;
 
        argv_array_push(&cp.args, "clone");
        argv_array_push(&cp.args, "--no-checkout");
@@ -896,13 +895,64 @@ static int resolve_relative_path(int argc, const char **argv, const char *prefix
 {
        struct strbuf sb = STRBUF_INIT;
        if (argc != 3)
-               die("submodule--helper relative_path takes exactly 2 arguments, got %d", argc);
+               die("submodule--helper relative-path takes exactly 2 arguments, got %d", argc);
 
        printf("%s", relative_path(argv[1], argv[2], &sb));
        strbuf_release(&sb);
        return 0;
 }
 
+static const char *remote_submodule_branch(const char *path)
+{
+       const struct submodule *sub;
+       gitmodules_config();
+       git_config(submodule_config, NULL);
+
+       sub = submodule_from_path(null_sha1, path);
+       if (!sub)
+               return NULL;
+
+       if (!sub->branch)
+               return "master";
+
+       if (!strcmp(sub->branch, ".")) {
+               unsigned char sha1[20];
+               const char *refname = resolve_ref_unsafe("HEAD", 0, sha1, NULL);
+
+               if (!refname)
+                       die(_("No such ref: %s"), "HEAD");
+
+               /* detached HEAD */
+               if (!strcmp(refname, "HEAD"))
+                       die(_("Submodule (%s) branch configured to inherit "
+                             "branch from superproject, but the superproject "
+                             "is not on any branch"), sub->name);
+
+               if (!skip_prefix(refname, "refs/heads/", &refname))
+                       die(_("Expecting a full ref name, got %s"), refname);
+               return refname;
+       }
+
+       return sub->branch;
+}
+
+static int resolve_remote_submodule_branch(int argc, const char **argv,
+               const char *prefix)
+{
+       const char *ret;
+       struct strbuf sb = STRBUF_INIT;
+       if (argc != 2)
+               die("submodule--helper remote-branch takes exactly one arguments, got %d", argc);
+
+       ret = remote_submodule_branch(argv[1]);
+       if (!ret)
+               die("submodule %s doesn't exist", argv[1]);
+
+       printf("%s", ret);
+       strbuf_release(&sb);
+       return 0;
+}
+
 struct cmd_struct {
        const char *cmd;
        int (*fn)(int, const char **, const char *);
@@ -916,7 +966,8 @@ static struct cmd_struct commands[] = {
        {"relative-path", resolve_relative_path},
        {"resolve-relative-url", resolve_relative_url},
        {"resolve-relative-url-test", resolve_relative_url_test},
-       {"init", module_init}
+       {"init", module_init},
+       {"remote-branch", resolve_remote_submodule_branch}
 };
 
 int cmd_submodule__helper(int argc, const char **argv, const char *prefix)