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Re: Unsupported grep options

From: Antonio Diaz Diaz
Subject: Re: Unsupported grep options
Date: Fri, 04 Mar 2022 04:23:38 +0100
User-agent: Mozilla/5.0 (X11; U; Linux i586; en-US; rv: Gecko/20110420 SeaMonkey/2.0.14

Jamboretz, Chris wrote:
First let me say thanks for providing this set of tools.

You are welcome. :-)

I've found some unsupported command line options and the first three are
probably the biggest concern:

-P  --perl-regexp

I can easily implement these, but is --colour really needed? I generally dislike implementing spelling variations, but this one is specially confusing because GNU grep does accept an environment variable named GREP_COLORS but none named GREP_COLOURS.

others are

-G  --basic-regexp
-U  --binary
-u  --unix-byte-offsets

'-u, --unix-byte-offsets' is going to be removed next year from GNU grep:

      case 'u':
        /* Obsolete option; it had no effect; FIXME: remove in 2023  */
        error (0, 0, _("warning: --unix-byte-offsets (-u) is obsolete"));

-T  --initial-tab

I don't see how -NUM can be implemented while respecting the syntax of command line arguments[1] where '-23' would mean '-C2 -C3', not '-C23'. I would recommend to use -C instead of the non-standard grep "option" -NUM.

[1] http://www.nongnu.org/arg-parser/manual/arg_parser_manual.html#Argument-syntax


No problem with these either.

I'll release a new version of zutils with the new options ASAP (in a few days).

Best regards,

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