format-patch: track several references

diff --git a/branch.c b/branch.c
index 56e949232cac1fe9dbe23aa93b50fe2f7c55c07d..1f00e44deb28afe74ae4f0b85b23039476032fe5 100644 (file)
--- a/branch.c
+++ b/branch.c
@@ -103,14 +103,22 @@ void create_branch(const char *head,
        struct ref_lock *lock;
        struct commit *commit;
        unsigned char sha1[20];
-       char *real_ref, ref[PATH_MAX], msg[PATH_MAX + 20];
+       char *real_ref, msg[PATH_MAX + 20];
+       struct strbuf ref = STRBUF_INIT;
        int forcing = 0;
+       int len;
 
-       snprintf(ref, sizeof ref, "refs/heads/%s", name);
-       if (check_ref_format(ref))
+       len = strlen(name);
+       if (interpret_nth_last_branch(name, &ref) != len) {
+               strbuf_reset(&ref);
+               strbuf_add(&ref, name, len);
+       }
+       strbuf_splice(&ref, 0, 0, "refs/heads/", 11);
+
+       if (check_ref_format(ref.buf))
                die("'%s' is not a valid branch name.", name);
 
-       if (resolve_ref(ref, sha1, 1, NULL)) {
+       if (resolve_ref(ref.buf, sha1, 1, NULL)) {
                if (!force)
                        die("A branch named '%s' already exists.", name);
                else if (!is_bare_repository() && !strcmp(head, name))
@@ -129,7 +137,9 @@ void create_branch(const char *head,
                        die("Cannot setup tracking information; starting point is not a branch.");
                break;
        case 1:
-               /* Unique completion -- good */
+               /* Unique completion -- good, only if it is a real ref */
+               if (track == BRANCH_TRACK_EXPLICIT && !strcmp(real_ref, "HEAD"))
+                       die("Cannot setup tracking information; starting point is not a branch.");
                break;
        default:
                die("Ambiguous object name: '%s'.", start_name);
@@ -140,7 +150,7 @@ void create_branch(const char *head,
                die("Not a valid branch point: '%s'.", start_name);
        hashcpy(sha1, commit->object.sha1);
 
-       lock = lock_any_ref_for_update(ref, NULL, 0);
+       lock = lock_any_ref_for_update(ref.buf, NULL, 0);
        if (!lock)
                die("Failed to lock ref for update: %s.", strerror(errno));
 
@@ -160,13 +170,15 @@ void create_branch(const char *head,
        if (write_ref_sha1(lock, sha1, msg) < 0)
                die("Failed to write ref: %s.", strerror(errno));
 
+       strbuf_release(&ref);
        free(real_ref);
 }
 
 void remove_branch_state(void)
 {
        unlink(git_path("MERGE_HEAD"));
-       unlink(git_path("rr-cache/MERGE_RR"));
+       unlink(git_path("MERGE_RR"));
        unlink(git_path("MERGE_MSG"));
+       unlink(git_path("MERGE_MODE"));
        unlink(git_path("SQUASH_MSG"));
 }