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guix hash: Interpret '-' as standard input.

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* guix/scripts/hash.scm (guix-hash)[file-hash]: Special-case "-".
* tests/guix-hash.sh: Add test.
* doc/guix.texi (Invoking guix hash): Document it.
This commit is contained in:
Ludovic Courtès 2016-10-28 21:28:18 +02:00
parent 12b6c951cf
commit 343dc11702
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3 changed files with 8 additions and 3 deletions
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4
doc/guix.texi
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@ -4791,7 +4791,9 @@ The general syntax is:
guix hash @var{option} @var{file}
@end example
@command{guix hash} has the following options:
When @var{file} is @code{-} (a hyphen), @command{guix hash} computes the
hash of data read from standard input. @command{guix hash} has the
following options:
@table @code

4
guix/scripts/hash.scm
View file

@ -139,7 +139,9 @@ and 'hexadecimal' can be used as well).\n"))
(write-file file port #:select? select?)
(force-output port)
(get-hash))
(call-with-input-file file port-sha256))))
(match file
("-" (port-sha256 (current-input-port)))
(_ (call-with-input-file file port-sha256))))))
(match args
((file)

3
tests/guix-hash.sh
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@ -1,5 +1,5 @@
# GNU Guix --- Functional package management for GNU
# Copyright © 2013, 2014 Ludovic Courtès <ludo@gnu.org>
# Copyright © 2013, 2014, 2016 Ludovic Courtès <ludo@gnu.org>
# Copyright © 2016 Jan Nieuwenhuizen <janneke@gnu.org>
#
# This file is part of GNU Guix.
@ -27,6 +27,7 @@ tmpdir="guix-hash-$$"
trap 'rm -rf "$tmpdir"' EXIT
test `guix hash /dev/null` = 0mdqa9w1p6cmli6976v4wi0sw9r4p5prkj7lzfd1877wk11c9c73
test `echo -n | guix hash -` = 0mdqa9w1p6cmli6976v4wi0sw9r4p5prkj7lzfd1877wk11c9c73
test `guix hash -f nix-base32 /dev/null` = 0mdqa9w1p6cmli6976v4wi0sw9r4p5prkj7lzfd1877wk11c9c73
test `guix hash -f hex /dev/null` = e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
test `guix hash -f base32 /dev/null` = 4oymiquy7qobjgx36tejs35zeqt24qpemsnzgtfeswmrw6csxbkq