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From: Stephane Chazelas <stephane.chazelas@HIDDEN>
Subject: Re: bug#37753: wish for glob(7)-like matcher
Date: Wed, 13 Nov 2019 18:00:50 +0000
Message-ID: <20191113180050.zunrwsfjmcxmg4pf@HIDDEN>
References: <20160201071906.8528.29704.reportbug@frey>
<20160201071906.8528.29704.reportbug@frey>
<20190926150716.GA30404@bartik> <20191015014312.GA2797@HIDDEN>
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2019-10-15 12:43:14 +1100, Trent W. Buck:
[...]
> > GNU grep already has options for fixed strings (-F),
> > and BRE, ERE and PCRE. Can we have one for glob(7)?
> >
> > AFAICT nobody has asked for this before; this surprises me,
> > because it "feels" like it should be easy to implement.
> >
> > Am I wrong?
[...]
For the record, ast-open's "grep" has
-K, --ksh-regexp
ksh(1) extended file match patterns.
That's ksh93 wildcards, a superset of bash -O extglob ones
(themselves shaped after ksh88's globs) with same feature level
as regexps.
$ echo abcde | ast-grep -Ko '?c?'
bcd
You can always define a POSIX shell function like:
fnmatch() (
pattern=${1?}; shift
cat -- "$@" | while IFS= read -r line || [ -n "$line" ]; do
case $line in ($pattern) printf '%s\n' "$line"
done
)
(though that will be very slow, especially with shells that
don't have "printf" or "[" builtin; and except in zsh, it won't
work properly with input containing NUL bytes).
Note that there is some variation in wildcard syntax from one
shell to the next and one or from one fnmatch() to the next
(though they generally support the minimum POSIX set at least).
There's also the question of whether you'd want to consider \ as
an escape operator (again YMMV depending on the shell for that
fnmatch() function above).
--
Stephane
bug-grep@HIDDEN:bug#37753; Package grep.
Full text available.Received: (at 37753) by debbugs.gnu.org; 13 Nov 2019 04:23:44 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Tue Nov 12 23:23:44 2019 Received: from localhost ([127.0.0.1]:58718 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1iUkBz-0008Ts-7A for submit <at> debbugs.gnu.org; Tue, 12 Nov 2019 23:23:44 -0500 Received: from youngberry.canonical.com ([91.189.89.112]:60640) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <seth.arnold@HIDDEN>) id 1iUjA1-0006kW-Da for 37753 <at> debbugs.gnu.org; Tue, 12 Nov 2019 22:17:37 -0500 Received: from 97-120-111-46.ptld.qwest.net ([97.120.111.46] helo=localhost) by youngberry.canonical.com with esmtpsa (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.86_2) (envelope-from <seth.arnold@HIDDEN>) id 1iUj9v-0004Ly-Bi for 37753 <at> debbugs.gnu.org; Wed, 13 Nov 2019 03:17:31 +0000 Date: Wed, 13 Nov 2019 03:17:29 +0000 From: Seth Arnold <seth.arnold@HIDDEN> To: 37753 <at> debbugs.gnu.org Subject: glob in grep Message-ID: <20191113031729.GB17080@millbarge> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.10.1 (2018-07-13) X-Spam-Score: -5.0 (-----) X-Debbugs-Envelope-To: 37753 X-Mailman-Approved-At: Tue, 12 Nov 2019 23:23:42 -0500 X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -6.0 (------) Hello, I know I've wanted this feature before, if for nothing else an easy way to test various glob patterns against various inputs without having to create a bunch of files in the filesystem. Thanks
bug-grep@HIDDEN:bug#37753; Package grep.
Full text available.Received: (at submit) by debbugs.gnu.org; 15 Oct 2019 01:43:26 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Mon Oct 14 21:43:26 2019 Received: from localhost ([127.0.0.1]:42488 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1iKBry-0003HV-Cc for submit <at> debbugs.gnu.org; Mon, 14 Oct 2019 21:43:26 -0400 Received: from mail-pf1-f182.google.com ([209.85.210.182]:38859) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <trentbuck@HIDDEN>) id 1iKBrw-0003HH-IW for submit <at> debbugs.gnu.org; Mon, 14 Oct 2019 21:43:24 -0400 Received: by mail-pf1-f182.google.com with SMTP id h195so11390805pfe.5 for <submit <at> debbugs.gnu.org>; Mon, 14 Oct 2019 18:43:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=4FX3HHGei5mywpYiP76R7u64rEt3Lp/quqyl8mcOnpI=; b=apxEg8o0gDgha5vi8zndD3JmLvmFkPMtVXp8TCoWoJvSIdaJk0yT9V9jrMRSDTOf9G KASeLeHwulD3L7d/QEdTHLlSc7B3louE+6vTH+Ce04TmWWSCaBGoFr1tAZoPnOn8Kq5K pismdU0V1dnXje0BqAJ4E4E8xKBCO/aweESNGgTchH1AZNxvOQrM2GP5bV90fgKa8+NV nU4Mb67659bZfJ5M8A0QL+MzrtZvKdj5qUf8d8ozrce2cyHsV7hHlNcfnuJfK70bgBBd WB6XzUoWEztck6XhPPdxqPBtNJQNquBRbM1Po+ZJNKh/bqNxjIunAIIC3qrOUwxB4Jh8 R+OQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=4FX3HHGei5mywpYiP76R7u64rEt3Lp/quqyl8mcOnpI=; b=Cw9CXBOrf1TqYsVtp6vrQtLVEDka7SWyKrYuvUccjeAplIksMLwDVxfK05rnfDh8Jj J1x7CFDtDbkoLjNq66/jCfJpFkPkHg5mY+jm4UUHTOaUbFSzTO3Y7eYq3VX3kw8RIB7I zC1wCnqlygoXGFM7C9l0ita91yItXBTCpKjFbRiUcildGYEeEzKsBnet+8QahDFnFYu/ O/cmE5tWyQRqi42yi9FVClCfmL06tILR7XK2/EIZmAU5l//eB+cIVvCQLsp61GedNhaP nf6hPyMToAYWHPLYVyT/AS712liK7pUsZ7vhqgfUe5+VQnH4N1/8n01TQ4fY9wmRSH+I ZpPw== X-Gm-Message-State: APjAAAUw3M8Ggl/jWedAcjs2Xkpga/H0/xoTH3EU3oXHbcmoVGq+FKMB pDsDGclElEjMnRZ3LukJI1gWPZvX X-Google-Smtp-Source: APXvYqy0MDVtvVDHd0sdyfEUrjNviS5GCG9pQgzyguyGwBXy1v6LCKYj+9OMOhpnH90FHDyEd29AYg== X-Received: by 2002:a62:e40d:: with SMTP id r13mr35640718pfh.154.1571103798115; Mon, 14 Oct 2019 18:43:18 -0700 (PDT) Received: from localhost ([203.7.155.117]) by smtp.gmail.com with ESMTPSA id m12sm23121691pff.66.2019.10.14.18.43.16 for <submit <at> debbugs.gnu.org> (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 14 Oct 2019 18:43:17 -0700 (PDT) Date: Tue, 15 Oct 2019 12:43:14 +1100 From: "Trent W. Buck" <trentbuck@HIDDEN> To: submit <at> debbugs.gnu.org Subject: wish for glob(7)-like matcher Message-ID: <20191015014312.GA2797@HIDDEN> References: <20160201071906.8528.29704.reportbug@frey> <20160201071906.8528.29704.reportbug@frey> <20190926150716.GA30404@bartik> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190926150716.GA30404@bartik> User-Agent: Mutt/1.10.1 (2018-07-13) X-Spam-Score: 0.0 (/) X-Debbugs-Envelope-To: submit X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.0 (-) Package: grep Version: 2.20-4 Severity: wishlist Tags: upstream This bug was originally reported as https://bugs.debian.org/813356 I am attempting to upstream it into bugs.gnu.org. PS: nowadays I also know to mention fnmatch(3). On Mon, 01 Feb 2016 18:19:06 +1100 "Trent W. Buck" <trentbuck@HIDDEN> wrote: > Sometimes I want to match globs instead of regexps. > glob(7) explicitly says: > "they match filenames, rather than text" > I don't see why globs shouldn't be used for text. > > > In bash this is ugly and *SLOW*, e.g. > > # Print log lines that match no "whitelisted" patterns. > while read -r line > do > if ! [[ line = glob1 || line = glob2 || ... ]] > then echo "$line" > fi > done <log > > instead of > > grep --basic-glob -vf whitelist log > > > GNU grep already has options for fixed strings (-F), > and BRE, ERE and PCRE. Can we have one for glob(7)? > > AFAICT nobody has asked for this before; this surprises me, > because it "feels" like it should be easy to implement. > > Am I wrong? > > Is there a good reason to WONTFIX this? > > > > I asked my peers and the only real counterargument I got was > "just learn regexps, you'll need them eventually". > > For my use case, I think globs would be more readable (esp. not having > to escape dots and parens), and easier to teach to non-technical staff. > (I haven't trialled it yet, because I don't have a globber that's as > fast as GNU grep is for regexps.) > > > PS: I'd have directly reported this upstream, > but https://sv.gnu.org/bugs/?group=grep says I must be a "project member", > and I'm not.
"Trent W. Buck" <trentbuck@HIDDEN>:bug-grep@HIDDEN.
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