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From: Duy Nguyen <pclouds@gmail.com>
To: Ramsay Jones <ramsay@ramsayjones.plus.com>
Cc: Git Mailing List <git@vger.kernel.org>,
	Konstantin Kharlamov <hi-angel@yandex.ru>,
	Eric Sunshine <sunshine@sunshineco.com>
Subject: Re: [PATCH v2 1/1] worktree add: sanitize worktree names
Date: Fri, 22 Feb 2019 16:21:16 +0700	[thread overview]
Message-ID: <CACsJy8Dw0y7qX7jgNH4j_e4YOg-vv0OVDQv99AzT-koZ=Fq-TQ@mail.gmail.com> (raw)
In-Reply-To: <6fe399f0-98ad-37e6-f4b1-3a3f6e4bce03@ramsayjones.plus.com>

On Fri, Feb 22, 2019 at 12:42 AM Ramsay Jones
<ramsay@ramsayjones.plus.com> wrote:
> > +static void sanitize_worktree_name(struct strbuf *name)
> > +{
> > +     char *orig_name = xstrdup(name->buf);
> > +     int i;
> > +
> > +     /*
> > +      * All special chars replaced with dashes. See
> > +      * check_refname_component() for reference.
> > +      * Note that .lock is also turned to -lock, removing its
> > +      * special status.
> > +      */
> > +     for (i = 0; i < name->len; i++) {
> > +             if (strchr(":?[]\\~ \t@{}*/.", name->buf[i]))
> > +                     name->buf[i] = '-';
> > +     }
> > +
> > +     /* remove consecutive dashes, leading or trailing dashes */
>
> Why? So, '[fred]' will be 'sanitized' to 'fred' (rather than '-fred-'),
> which would increase the chance of a 'collision' with the 'fred'
> worktree (not very likely, but still). Is that useful? How about
> 'x86_64-*-gnu' which now becomes 'x86_64-gnu'?

It is useful when you want to specify HEAD of [fred] for example.
Writing worktrees/fred/HEAD is a bit better than
worktrees/-fred-/HEAD. I haven't done it yet, but these names will be
shown in "git worktree list" too and lots of dashes does not improve
readability. Collision is not a problem because if fred is taken, the
final name would be fred1 or fred<some other number>.

If you're really bothered with this, you will be able to specify the
name you want (you can't, yet). You still have to pass the valid
refname check, but you have a lot more flexibility.

So this code only needs to work mostly ok for the common case and I
could go either way, clean up consecutive dashes or not. I suppose
simpler code would be the tie breaker.
-- 
Duy

  reply	other threads:[~2019-02-22  9:21 UTC|newest]

Thread overview: 41+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-02-18 14:36 git gc fails with "unable to resolve reference" for worktree hi-angel
2019-02-18 15:02 ` Duy Nguyen
2019-02-18 15:09   ` hi-angel
2019-02-18 15:18     ` Duy Nguyen
2019-02-20 14:34       ` hi-angel
2019-02-21 11:00 ` [PATCH] worktree add: sanitize worktree names Nguyễn Thái Ngọc Duy
2019-02-21 11:28   ` Konstantin Kharlamov
2019-02-21 11:38     ` Duy Nguyen
2019-02-21 11:44       ` Konstantin Kharlamov
2019-02-21 11:52         ` Duy Nguyen
2019-02-21 13:23           ` Jeff King
2019-02-21 12:19   ` [PATCH v2 0/1] " Nguyễn Thái Ngọc Duy
2019-02-21 12:19     ` [PATCH v2 1/1] " Nguyễn Thái Ngọc Duy
2019-02-21 13:22       ` Jeff King
2019-02-21 17:41       ` Ramsay Jones
2019-02-22  9:21         ` Duy Nguyen [this message]
2019-02-26 10:58     ` [PATCH v3 0/1] " Nguyễn Thái Ngọc Duy
2019-02-26 10:58       ` [PATCH v3 1/1] " Nguyễn Thái Ngọc Duy
2019-02-27 12:08         ` Jeff King
2019-02-27 14:23           ` Eric Sunshine
2019-02-27 16:04             ` Jeff King
2019-03-03  1:22               ` Junio C Hamano
2019-03-04 11:19               ` Duy Nguyen
2019-03-04 12:04                 ` Duy Nguyen
2019-03-04 15:06         ` Johannes Schindelin
2019-03-05 12:08       ` [PATCH v4 0/2] " Nguyễn Thái Ngọc Duy
2019-03-05 12:08         ` [PATCH v4 1/2] refs.c: refactor check_refname_component() Nguyễn Thái Ngọc Duy
2019-03-06 21:49           ` Jeff King
2019-03-07 23:24             ` Eric Sunshine
2019-03-05 12:08         ` [PATCH v4 2/2] worktree add: sanitize worktree names Nguyễn Thái Ngọc Duy
2019-03-08  9:28         ` [PATCH v5 0/1] " Nguyễn Thái Ngọc Duy
2019-03-08  9:28           ` [PATCH v5 1/1] " Nguyễn Thái Ngọc Duy
2019-03-10  2:02             ` Eric Sunshine
2019-03-11  6:20               ` Junio C Hamano
2019-03-11  9:24                 ` Duy Nguyen
2019-03-11 22:39                   ` Jeff King
2019-03-12  6:32                     ` Junio C Hamano
2019-03-11  6:36             ` Junio C Hamano
2019-03-11  9:27               ` Duy Nguyen
2019-03-11 13:05             ` Johannes Schindelin
2019-03-12  6:45               ` Junio C Hamano

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