From: Junio C Hamano <gitster@pobox.com>
To: "Ævar Arnfjörð Bjarmason" <avarab@gmail.com>
Cc: Patrick Steinhardt <ps@pks.im>, git@vger.kernel.org
Subject: Re: [PATCH 2/2] config: allow specifying config entries via envvar pairs
Date: Mon, 16 Nov 2020 11:39:35 -0800 [thread overview]
Message-ID: <xmqqy2j1851k.fsf@gitster.c.googlers.com> (raw)
In-Reply-To: <87mtzlflw7.fsf@evledraar.gmail.com> ("Ævar Arnfjörð Bjarmason"'s message of "Fri, 13 Nov 2020 14:04:40 +0100")
Ævar Arnfjörð Bjarmason <avarab@gmail.com> writes:
> On Fri, Nov 13 2020, Patrick Steinhardt wrote:
>
>> While not document, it is currently possible to specify config entries
>
> "While not documented..."
>
>> + strbuf_addf(&envvar, "GIT_CONFIG_KEY_%d", i);
>> + if ((key = getenv(envvar.buf)) == NULL)
>> + break;
>
> The convention in git.git is to avoid explicit NULL checks. So maybe
> something like this, which also avoids the assignment inside an "if"
>
> key = getenv(envvar.buf);
> if (!key)
> break;
All good suggestions, but...
"While not documented" yes, for sure, but we do not document it for
a good reason---it is a pure implementation detail between Git
process that runs another one as its internal implementation detail.
I especially do not think we want to read from unbounded number of
GIT_CONFIG_KEY_<N> variables like this patch does. How would a
script cleanse its environment to protect itself from stray such
environment variable pair? Count up from 1 to forever? Run "env"
and grep for "GIT_CONFIG_KEY_[0-9]*=" (the answer is No. What if
some environment variables have newline in its values?)
next prev parent reply other threads:[~2020-11-16 19:41 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-13 12:16 [PATCH 0/2] config: allow specifying config entries via envvar pairs Patrick Steinhardt
2020-11-13 12:16 ` [PATCH 1/2] config: extract function to parse config pairs Patrick Steinhardt
2020-11-13 12:16 ` [PATCH 2/2] config: allow specifying config entries via envvar pairs Patrick Steinhardt
2020-11-13 13:04 ` Ævar Arnfjörð Bjarmason
2020-11-16 19:39 ` Junio C Hamano [this message]
2020-11-17 2:34 ` Jeff King
2020-11-17 6:37 ` Patrick Steinhardt
2020-11-17 7:01 ` Jeff King
2020-11-17 14:22 ` Ævar Arnfjörð Bjarmason
2020-11-17 23:57 ` Jeff King
2020-11-18 13:44 ` Ævar Arnfjörð Bjarmason
2020-11-18 0:50 ` brian m. carlson
2020-11-18 1:59 ` Jeff King
2020-11-18 2:25 ` brian m. carlson
2020-11-18 7:04 ` Patrick Steinhardt
2020-11-19 2:11 ` brian m. carlson
2020-11-19 6:37 ` Patrick Steinhardt
2020-11-18 5:44 ` Junio C Hamano
2020-11-17 6:28 ` Patrick Steinhardt
2020-11-17 7:06 ` Junio C Hamano
2020-11-18 13:49 ` Ævar Arnfjörð Bjarmason
2020-11-18 13:56 ` Patrick Steinhardt
2020-11-18 16:01 ` Junio C Hamano
2020-11-17 14:03 ` Ævar Arnfjörð Bjarmason
2020-11-13 16:37 ` Philip Oakley
2020-11-17 6:40 ` Patrick Steinhardt
2020-11-13 13:11 ` [PATCH 0/2] " Ævar Arnfjörð Bjarmason
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=xmqqy2j1851k.fsf@gitster.c.googlers.com \
--to=gitster@pobox.com \
--cc=avarab@gmail.com \
--cc=git@vger.kernel.org \
--cc=ps@pks.im \
/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
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this public inbox
https://80x24.org/mirrors/git.git
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).