worktree: add: suppress auto-vivication with --detach and no <branch>

diff --git a/builtin/checkout.c b/builtin/checkout.c
index 1992c41d484e0755858bbe0be80618f3322b8349..4ae895ca94dbcd39b6509efa95f311e68e88ff93 100644 (file)
--- a/builtin/checkout.c
+++ b/builtin/checkout.c
@@ -873,71 +873,6 @@ static const char *unique_tracking_name(const char *name, unsigned char *sha1)
        return NULL;
 }
 
-static void check_linked_checkout(struct branch_info *new, const char *id)
-{
-       struct strbuf sb = STRBUF_INIT;
-       struct strbuf path = STRBUF_INIT;
-       struct strbuf gitdir = STRBUF_INIT;
-       const char *start, *end;
-
-       /*
-        * $GIT_COMMON_DIR/HEAD is practically outside
-        * $GIT_DIR so resolve_ref_unsafe() won't work (it
-        * uses git_path). Parse the ref ourselves.
-        */
-       if (id)
-               strbuf_addf(&path, "%s/worktrees/%s/HEAD", get_git_common_dir(), id);
-       else
-               strbuf_addf(&path, "%s/HEAD", get_git_common_dir());
-
-       if (strbuf_read_file(&sb, path.buf, 0) < 0 ||
-           !skip_prefix(sb.buf, "ref:", &start))
-               goto done;
-       while (isspace(*start))
-               start++;
-       end = start;
-       while (*end && !isspace(*end))
-               end++;
-       if (strncmp(start, new->path, end - start) || new->path[end - start] != '\0')
-               goto done;
-       if (id) {
-               strbuf_reset(&path);
-               strbuf_addf(&path, "%s/worktrees/%s/gitdir", get_git_common_dir(), id);
-               if (strbuf_read_file(&gitdir, path.buf, 0) <= 0)
-                       goto done;
-               strbuf_rtrim(&gitdir);
-       } else
-               strbuf_addstr(&gitdir, get_git_common_dir());
-       die(_("'%s' is already checked out at '%s'"), new->name, gitdir.buf);
-done:
-       strbuf_release(&path);
-       strbuf_release(&sb);
-       strbuf_release(&gitdir);
-}
-
-static void die_if_checked_out(struct branch_info *new)
-{
-       struct strbuf path = STRBUF_INIT;
-       DIR *dir;
-       struct dirent *d;
-
-       check_linked_checkout(new, NULL);
-
-       strbuf_addf(&path, "%s/worktrees", get_git_common_dir());
-       if ((dir = opendir(path.buf)) == NULL) {
-               strbuf_release(&path);
-               return;
-       }
-
-       while ((d = readdir(dir)) != NULL) {
-               if (!strcmp(d->d_name, ".") || !strcmp(d->d_name, ".."))
-                       continue;
-               check_linked_checkout(new, d->d_name);
-       }
-       strbuf_release(&path);
-       closedir(dir);
-}
-
 static int parse_branchname_arg(int argc, const char **argv,
                                int dwim_new_local_branch_ok,
                                struct branch_info *new,
@@ -1152,7 +1087,7 @@ static int checkout_branch(struct checkout_opts *opts,
                char *head_ref = resolve_refdup("HEAD", 0, sha1, &flag);
                if (head_ref &&
                    (!(flag & REF_ISSYMREF) || strcmp(head_ref, new->path)))
-                       die_if_checked_out(new);
+                       die_if_checked_out(new->path);
                free(head_ref);
        }