worktree: introduce "add" command

diff --git a/setup.c b/setup.c
index b99bdd30e65dfa612a432da8cc4121126724b480..fb6186049d1d9af1e84b2468c069b346c5a24a3b 100644 (file)
--- a/setup.c
+++ b/setup.c
@@ -390,6 +390,17 @@ static int check_repository_format_gently(const char *gitdir, int *nongit_ok)
        return ret;
 }
 
+static void update_linked_gitdir(const char *gitfile, const char *gitdir)
+{
+       struct strbuf path = STRBUF_INIT;
+       struct stat st;
+
+       strbuf_addf(&path, "%s/gitfile", gitdir);
+       if (stat(path.buf, &st) || st.st_mtime + 24 * 3600 < time(NULL))
+               write_file(path.buf, 0, "%s\n", gitfile);
+       strbuf_release(&path);
+}
+
 /*
  * Try to read the location of the git directory from the .git file,
  * return path to git directory if found.
@@ -438,6 +449,8 @@ const char *read_gitfile(const char *path)
 
        if (!is_git_directory(dir))
                die("Not a git repository: %s", dir);
+
+       update_linked_gitdir(path, dir);
        path = real_path(dir);
 
        free(buf);