git@vger.kernel.org list mirror (unofficial, one of many)
 help / color / mirror / code / Atom feed
From: Junio C Hamano <gitster@pobox.com>
To: Emily Shaffer <emilyshaffer@google.com>
Cc: Derrick Stolee <stolee@gmail.com>, git@vger.kernel.org
Subject: Re: ds/maintenance-part-3 (was Re: What's cooking in git.git (Nov 2020, #02; Mon, 9))
Date: Mon, 16 Nov 2020 16:40:35 -0800
Message-ID: <xmqqh7po7r3w.fsf@gitster.c.googlers.com> (raw)
In-Reply-To: <20201116235642.GA15562@google.com> (Emily Shaffer's message of "Mon, 16 Nov 2020 15:56:42 -0800")

Emily Shaffer <emilyshaffer@google.com> writes:

> Because 'git maintenance unregister' spins a child process to call 'git
> config --unset maintenance.repo <cwd>', it actually fails if "cwd"
> contains a POSIX regular expression special character:
>
>   git config [<file-option>] --unset name [value_regex]

Good find.  And it is even worse that value_regex uses ERE, not BRE,
which means even an otherwise innocuous letter like '+' cannot be
used without quoting.

> You can demo it for yourself like so:
>
>   git init repro+for+maintenance
>   git maintenance register
>   git maintenance unregister
>   echo $?	# returns '5'
>   git config --list --global
>
> I see two paths forward:
>

0. Quote the value_regex properly, instead of blindly using a value
   that comes from the environment.

> 1. Teach 'git config' to learn either which regex parser to use
> (including fixed), or at least to learn "value isn't a regex", or
>
> 2. Don't spin a child process in 'git maintenance [un]register' and
> instead just call the config API.

> I'd suggest #2. The config API is very nice, and seems to have a simple
> way to add or remove configs to your global file in just a couple of
> lines. If there's a reason why it's not simpler to do it that way, it's
> my fault for missing the review :)

My short-to-mid-term preference is to do #1 to allow a value to be
spelled literally (i.e. remove entry with _this_ value, and add this
one instead), and optionally do #2 as an optimization that is not
essential.  I do not offhand know how you can make #2 alone fly
without doing some form of #1, as I think the same value_regex that
ought to be ERE to specify entries to be replaced needs to be used
under the cover even if you use "config API" anyway.

Thanks.






  reply	other threads:[~2020-11-17  0:42 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-09 23:42 What's cooking in git.git (Nov 2020, #02; Mon, 9) Junio C Hamano
2020-11-10  0:44 ` Elijah Newren
2020-11-10  1:03   ` Jeff King
2020-11-10 13:31 ` ds/maintenance-part-3 (was Re: What's cooking in git.git (Nov 2020, #02; Mon, 9)) Derrick Stolee
2020-11-16 23:56   ` Emily Shaffer
2020-11-17  0:40     ` Junio C Hamano [this message]
2020-11-17  1:07       ` Emily Shaffer
2020-11-17 13:56         ` Derrick Stolee
2020-11-17 19:18           ` Emily Shaffer
2020-11-17 19:34           ` Junio C Hamano
2020-11-17 21:12             ` Derrick Stolee
2020-11-19  2:16               ` Junio C Hamano
2020-11-19 13:25                 ` Derrick Stolee
2020-11-19 15:53                   ` Derrick Stolee
2020-11-19 18:06                   ` Junio C Hamano

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

  List information: http://vger.kernel.org/majordomo-info.html

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=xmqqh7po7r3w.fsf@gitster.c.googlers.com \
    --to=gitster@pobox.com \
    --cc=emilyshaffer@google.com \
    --cc=git@vger.kernel.org \
    --cc=stolee@gmail.com \
    --subject='Re: ds/maintenance-part-3 (was Re: What'\''s cooking in git.git (Nov 2020, #02; Mon, 9))' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

git@vger.kernel.org list mirror (unofficial, one of many)

This inbox may be cloned and mirrored by anyone:

	git clone --mirror https://public-inbox.org/git
	git clone --mirror http://ou63pmih66umazou.onion/git
	git clone --mirror http://czquwvybam4bgbro.onion/git
	git clone --mirror http://hjrcffqmbrq6wope.onion/git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V1 git git/ https://public-inbox.org/git \
		git@vger.kernel.org
	public-inbox-index git

Example config snippet for mirrors.
Newsgroups are available over NNTP:
	nntp://news.public-inbox.org/inbox.comp.version-control.git
	nntp://ou63pmih66umazou.onion/inbox.comp.version-control.git
	nntp://czquwvybam4bgbro.onion/inbox.comp.version-control.git
	nntp://hjrcffqmbrq6wope.onion/inbox.comp.version-control.git
	nntp://news.gmane.io/gmane.comp.version-control.git
 note: .onion URLs require Tor: https://www.torproject.org/

code repositories for project(s) associated with this inbox:

	https://80x24.org/mirrors/git.git

AGPL code for this site: git clone https://public-inbox.org/public-inbox.git