Merge branch 'es/worktree-add-cleanup'
[git/git.git] / branch.c
index b002435..c85be07 100644 (file)
--- a/branch.c
+++ b/branch.c
@@ -310,3 +310,70 @@ void remove_branch_state(void)
        unlink(git_path("MERGE_MODE"));
        unlink(git_path("SQUASH_MSG"));
 }
+
+static void check_linked_checkout(const char *branch, const char *id)
+{
+       struct strbuf sb = STRBUF_INIT;
+       struct strbuf path = STRBUF_INIT;
+       struct strbuf gitdir = STRBUF_INIT;
+
+       /*
+        * $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_readlink(&sb, path.buf, 0)) {
+               if (!starts_with(sb.buf, "refs/") ||
+                   check_refname_format(sb.buf, 0))
+                       goto done;
+       } else if (strbuf_read_file(&sb, path.buf, 0) >= 0 &&
+           starts_with(sb.buf, "ref:")) {
+               strbuf_remove(&sb, 0, strlen("ref:"));
+               strbuf_trim(&sb);
+       } else
+               goto done;
+       if (strcmp(sb.buf, branch))
+               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());
+       skip_prefix(branch, "refs/heads/", &branch);
+       strbuf_strip_suffix(&gitdir, ".git");
+       die(_("'%s' is already checked out at '%s'"), branch, gitdir.buf);
+done:
+       strbuf_release(&path);
+       strbuf_release(&sb);
+       strbuf_release(&gitdir);
+}
+
+void die_if_checked_out(const char *branch)
+{
+       struct strbuf path = STRBUF_INIT;
+       DIR *dir;
+       struct dirent *d;
+
+       check_linked_checkout(branch, NULL);
+
+       strbuf_addf(&path, "%s/worktrees", get_git_common_dir());
+       dir = opendir(path.buf);
+       strbuf_release(&path);
+       if (!dir)
+               return;
+
+       while ((d = readdir(dir)) != NULL) {
+               if (!strcmp(d->d_name, ".") || !strcmp(d->d_name, ".."))
+                       continue;
+               check_linked_checkout(branch, d->d_name);
+       }
+       closedir(dir);
+}