Re: [PATCH v2 0/3] worktree: teach add to accept --reason with --lock

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On Thu, Jul 08, 2021 at 03:50:40PM +0000, Stephen Manz via GitGitGadget wrote:
> The default reason stored in the lock file, "added with --lock", is unlikely
> to be what the user would have given in a separate git worktree lock
> command. Allowing --reason to be specified along with --lock when adding a
> working tree gives the user control over the reason for locking without
> needing a second command.
>
> Changes since v1:
>
>  * Split changes into 3 commits. The first commit is removal of git
>    rev-parse in the test above the ones I'm adding. The second is wrapping
>    the "added with --lock" string with _() to mark it for translation. The
>    third commit is the main change.
>  * Reworked the if-else-if-else to if-else if-else
>  * Added test_when_finished ... command to unlock the working tree
>  * Changed test_expect_failure to test_expect_success and embedded
>    test_must_fail and test_path_is_missing commands

Thanks, all these changes make sense. Aside from a missing `_()` in
patch [2/3] mentioned in my review of that patch, everything looks
fine.

> Note: I don't see how to disambiguate --lock with no --reason from no --lock
> at all. I still think that the original keep_locked boolean is needed along
> with the new lock_reason char array. If I don't add lock_reason and change
> keep_locked to a char array, it will start as NULL. But it will remain NULL
> if --lock alone is given or if --lock isn't given at all.

The reason I suggested re-purposing `add_opts.keep_locked` is to avoid
polluting that structure with members having overlapping meaning, thus
reducing the confusion-factor for clients of that structure (assuming
that a tri-state `keep_locked` is indeed less confusing). That doesn't
preclude adding a new variable or two local to the `add()` function to
facilitate keeping `add_opts` pure. For instance, it might be as
simple as the below patch.

Anyhow, it's a minor suggestion and the sort of thing which can be
dealt with later if someone deems it important. Moreover, it's
subjective enough that it should not be a blocker for this patch
series if you don't do it that way. As mentioned above -- missing
`_()` aside -- the entire series looks reasonable as long as people
feel the UI choice is sound. (I, personally, still favor
`--lock[=<reason>]`, but I'm just one reviewer...)

--- >8 ---

diff --git a/builtin/worktree.c b/builtin/worktree.c
index 976bf8ed06..22df2b60f2 100644
--- a/builtin/worktree.c
+++ b/builtin/worktree.c
@@ -30,7 +30,7 @@ struct add_opts {
 	int detach;
 	int quiet;
 	int checkout;
-	int keep_locked;
+	const char *keep_locked;
 };
 
 static int show_only;
@@ -304,6 +304,8 @@ static int add_worktree(const char *path, const char *refname,
 	strbuf_addf(&sb, "%s/locked", sb_repo.buf);
 	if (!opts->keep_locked)
 		write_file(sb.buf, "initializing");
+	else if (*opts->keep_locked)
+		write_file(sb.buf, "%s", opts->keep_locked);
 	else
 		write_file(sb.buf, "added with --lock");
 
@@ -475,6 +477,8 @@ static int add(int ac, const char **av, const char *prefix)
 	const char *branch;
 	const char *new_branch = NULL;
 	const char *opt_track = NULL;
+	int keep_locked = 0;
+	const char *lock_reason = NULL;
 	struct option options[] = {
 		OPT__FORCE(&opts.force,
 			   N_("checkout <branch> even if already checked out in other worktree"),
@@ -485,7 +489,9 @@ static int add(int ac, const char **av, const char *prefix)
 			   N_("create or reset a branch")),
 		OPT_BOOL('d', "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_BOOL(0, "lock", &keep_locked, N_("keep the new working tree locked")),
+		OPT_STRING(0, "reason", &lock_reason, N_("string"),
+			   N_("reason for locking")),
 		OPT__QUIET(&opts.quiet, N_("suppress progress reporting")),
 		OPT_PASSTHRU(0, "track", &opt_track, NULL,
 			     N_("set up tracking mode (see git-branch(1))"),
@@ -500,6 +506,10 @@ static int add(int ac, const char **av, const char *prefix)
 	ac = parse_options(ac, av, prefix, options, worktree_usage, 0);
 	if (!!opts.detach + !!new_branch + !!new_branch_force > 1)
 		die(_("-b, -B, and --detach are mutually exclusive"));
+	if (lock_reason && !keep_locked)
+		die(_("--reason requires --lock"));
+	if (keep_locked)
+		opts.keep_locked = lock_reason ? lock_reason : "";
 	if (ac < 1 || ac > 2)
 		usage_with_options(worktree_usage, options);
 
-- 
2.32.0.372.g085311d9fa



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