As per the following, the (currently non-existent) "ig" flavor of
pipe-filter would enable a simple implementation of a useful grep patch.
Perhaps it would be worth recording this fact in pipe-filter.h as a
motivator?
---------- Forwarded message ----------
From: Reuben Thomas <invalid.nore...@gnu.org>
Date: 22 August 2012 18:43
Subject: [patch #6107] Patch to add transparent decompression
To: Reuben Thomas <r...@sc3d.org>, bug-g...@gnu.org, ka...@ucw.cz
Follow-up Comment #3, patch #6107 (project grep):
After discussion on bug-grep, it seems that a generalized filter is
preferred.
I have a design for this, but I have not implemented it, as it would be easy
to implement given an implementation in gnulib of the "ig" flavour of
pipe-filter, which currently does not exist. That would enable a simple and
non-invasive patch.
If pipe-filter-ig is forthcoming, I'll happily produce the patch, which
would
add a --filter=PROGRAM flag which pipes all input through the given filter.
Transparent decompression is achieved by making the filter "zcat".
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