Merge branch 'nd/worktree-add-lock'
authorJunio C Hamano <gitster@pobox.com>
Wed, 26 Apr 2017 06:39:12 +0000 (15:39 +0900)
committerJunio C Hamano <gitster@pobox.com>
Wed, 26 Apr 2017 06:39:12 +0000 (15:39 +0900)
Allow to lock a worktree immediately after it's created. This helps
prevent a race between "git worktree add; git worktree lock" and
"git worktree prune".

* nd/worktree-add-lock:
  worktree add: add --lock option

Documentation/git-worktree.txt
builtin/worktree.c
t/t2025-worktree-add.sh

index 553cf84..b472acc 100644 (file)
@@ -9,7 +9,7 @@ git-worktree - Manage multiple working trees
 SYNOPSIS
 --------
 [verse]
-'git worktree add' [-f] [--detach] [--checkout] [-b <new-branch>] <path> [<branch>]
+'git worktree add' [-f] [--detach] [--checkout] [--lock] [-b <new-branch>] <path> [<branch>]
 'git worktree list' [--porcelain]
 'git worktree lock' [--reason <string>] <worktree>
 'git worktree prune' [-n] [-v] [--expire <expire>]
@@ -107,6 +107,11 @@ OPTIONS
        such as configuring sparse-checkout. See "Sparse checkout"
        in linkgit:git-read-tree[1].
 
+--lock::
+       Keep the working tree locked after creation. This is the
+       equivalent of `git worktree lock` after `git worktree add`,
+       but without race condition.
+
 -n::
 --dry-run::
        With `prune`, do not remove anything; just report what it would
index 57caa08..1722a9b 100644 (file)
@@ -24,6 +24,7 @@ struct add_opts {
        int force;
        int detach;
        int checkout;
+       int keep_locked;
        const char *new_branch;
        int force_new_branch;
 };
@@ -240,7 +241,10 @@ static int add_worktree(const char *path, const char *refname,
         * after the preparation is over.
         */
        strbuf_addf(&sb, "%s/locked", sb_repo.buf);
-       write_file(sb.buf, "initializing");
+       if (!opts->keep_locked)
+               write_file(sb.buf, "initializing");
+       else
+               write_file(sb.buf, "added with --lock");
 
        strbuf_addf(&sb_git, "%s/.git", path);
        if (safe_create_leading_directories_const(sb_git.buf))
@@ -301,9 +305,11 @@ static int add_worktree(const char *path, const char *refname,
        junk_git_dir = NULL;
 
 done:
-       strbuf_reset(&sb);
-       strbuf_addf(&sb, "%s/locked", sb_repo.buf);
-       unlink_or_warn(sb.buf);
+       if (ret || !opts->keep_locked) {
+               strbuf_reset(&sb);
+               strbuf_addf(&sb, "%s/locked", sb_repo.buf);
+               unlink_or_warn(sb.buf);
+       }
        argv_array_clear(&child_env);
        strbuf_release(&sb);
        strbuf_release(&symref);
@@ -326,6 +332,7 @@ static int add(int ac, const char **av, const char *prefix)
                           N_("create or reset a branch")),
                OPT_BOOL(0, "detach", &opts.detach, N_("detach HEAD at named commit")),
                OPT_BOOL(0, "checkout", &opts.checkout, N_("populate the new working tree")),
+               OPT_BOOL(0, "lock", &opts.keep_locked, N_("keep the new working tree locked")),
                OPT_END()
        };
 
index b618d6b..b5c47ac 100755 (executable)
@@ -63,6 +63,12 @@ test_expect_success '"add" worktree' '
        )
 '
 
+test_expect_success '"add" worktree with lock' '
+       git rev-parse HEAD >expect &&
+       git worktree add --detach --lock here-with-lock master &&
+       test -f .git/worktrees/here-with-lock/locked
+'
+
 test_expect_success '"add" worktree from a subdir' '
        (
                mkdir sub &&