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From: Andreas Schwab <schwab@linux-m68k.org>
To: "brian m. carlson" <sandals@crustytoothpaste.net>
Cc: Taylor Blau <me@ttaylorr.com>, Denton Liu <liu.denton@gmail.com>,
	Git Mailing List <git@vger.kernel.org>
Subject: Re: [PATCH 2/4] builtin/rev-parse: learn --null-oid
Date: Sun, 20 Sep 2020 18:03:24 +0200	[thread overview]
Message-ID: <87h7rsl9kj.fsf@igel.home> (raw)
In-Reply-To: <20200918212609.GC67496@camp.crustytoothpaste.net> (brian m. carlson's message of "Fri, 18 Sep 2020 21:26:09 +0000")

On Sep 18 2020, brian m. carlson wrote:

> What I typically do when I write shell scripts, and which may obviate
> the need for this patch is turn this:
>
>   [ "$oid" = 0000000000000000000000000000000000000000 ]
>
> into this:
>
>   echo "$oid" | grep -qsE '^0+$'
>
> This is slightly less efficient, but it's also backwards compatible
> with older Git version assuming you have a POSIX grep.

You can also use

  case $oid in *[1-9a-f]*) ... ;; *) ... ;; esac

which doesn't need an external process.

Andreas.

-- 
Andreas Schwab, schwab@linux-m68k.org
GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510  2552 DF73 E780 A9DA AEC1
"And now for something completely different."

  parent reply	other threads:[~2020-09-20 16:03 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-18 11:19 [PATCH 0/4] sample hooks: become hash agnostic Denton Liu
2020-09-18 11:19 ` [PATCH 1/4] hooks--pre-push.sample: prefer $() for command substitution Denton Liu
2020-09-18 16:57   ` Eric Sunshine
2020-09-18 11:19 ` [PATCH 2/4] builtin/rev-parse: learn --null-oid Denton Liu
2020-09-18 14:11   ` Taylor Blau
2020-09-18 14:16     ` Taylor Blau
2020-09-18 18:16       ` Junio C Hamano
2020-09-18 18:21         ` Taylor Blau
2020-09-18 21:26     ` brian m. carlson
2020-09-20  4:25       ` Chris Torek
2020-09-20 18:58         ` brian m. carlson
2020-09-20 15:35       ` Taylor Blau
2020-09-20 16:03       ` Andreas Schwab [this message]
2020-09-18 11:19 ` [PATCH 3/4] hooks--pre-push.sample: use hash-agnostic null OID Denton Liu
2020-09-18 17:06   ` Eric Sunshine
2020-09-18 11:19 ` [PATCH 4/4] hooks--update.sample: " Denton Liu
2020-09-18 17:08   ` Eric Sunshine
2020-09-18 21:35 ` [PATCH 0/4] sample hooks: become hash agnostic brian m. carlson
2020-09-23  9:38 ` [PATCH v2 0/3] " Denton Liu
2020-09-23  9:38   ` [PATCH v2 1/3] hooks--pre-push.sample: modernize script Denton Liu
2020-09-23  9:38   ` [PATCH v2 2/3] hooks--pre-push.sample: use hash-agnostic zero OID Denton Liu
2020-09-23  9:38   ` [PATCH v2 3/3] hooks--update.sample: " Denton Liu
2020-09-23 16:34   ` [PATCH v2 0/3] sample hooks: become hash agnostic Junio C Hamano

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