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Add 'guix hash'. 

* guix/scripts/hash.scm: New file.
* Makefile.am (MODULES): Add it.
* po/POTFILES.in: Add it.
* doc/guix.texi (Invoking guix hash): New node.
  (Defining Packages): Add a cross-reference to the 'Invoking guix
  hash' node.
master
Nikita Karetnikov 2013-04-21 17:20:00 +00:00
parent bfda2997c8
commit 6c365eca6d
4 changed files with 157 additions and 2 deletions
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1
Makefile.am
View File

@ -30,6 +30,7 @@ MODULES = \
guix/scripts/import.scm \
guix/scripts/package.scm \
guix/scripts/gc.scm \
guix/scripts/hash.scm \
guix/scripts/pull.scm \
guix/scripts/substitute-binary.scm \
guix/base32.scm \

37
doc/guix.texi
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@ -814,8 +814,9 @@ the GNU mirrors defined in @code{(guix download)}.
The @code{sha256} field specifies the expected SHA256 hash of the file
being downloaded. It is mandatory, and allows Guix to check the
integrity of the file. The @code{(base32 @dots{})} form introduces the
base32 representation of the hash. A convenient way to obtain this
information is with the @code{guix download} tool.
base32 representation of the hash. You can obtain this information with
the @code{guix hash} (@pxref{Invoking guix hash}) and @code{guix
download} tools.
@item
@cindex GNU Build System
@ -1094,6 +1095,7 @@ space.
@menu
* Invoking guix build:: Building packages from the command line.
* Invoking guix hash:: Computing the cryptographic hash of a file.
@end menu
@node Invoking guix build
@ -1189,6 +1191,37 @@ the @code{package-derivation} procedure of the @code{(guix packages)}
module, and to the @code{build-derivations} procedure of the @code{(guix
store)} module.
@node Invoking guix hash
@section Invoking @command{guix hash}
The @command{guix hash} command allows to check the integrity of a file.
It is primarily a convenience tool for anyone contributing to the
distribution: it computes the cryptographic hash of a file, which can be
used in the definition of a package (@pxref{Defining Packages}).
The general syntax is:
@example
guix hash @var{option} @var{file}
@end example
@command{guix hash} has the following option:
@table @code
@item --format=@var{fmt}
@itemx -f @var{fmt}
Write the hash in the given format.
Supported formats: @code{nix-base32}, @code{base32}, @code{base16}
(@code{hex} and @code{hexadecimal} can be used as well).
If the @option{--format} option is not specified, @command{guix hash}
will output the hash in @code{nix-base32}. This representation is used
in the definitions of packages.
@end table
@c *********************************************************************
@node GNU Distribution
@chapter GNU Distribution

120
guix/scripts/hash.scm 100644
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@ -0,0 +1,120 @@
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2012, 2013 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2013 Nikita Karetnikov <nikita@karetnikov.org>
;;;
;;; This file is part of GNU Guix.
;;;
;;; GNU Guix is free software; you can redistribute it and/or modify it
;;; under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 3 of the License, or (at
;;; your option) any later version.
;;;
;;; GNU Guix is distributed in the hope that it will be useful, but
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;;; GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
(define-module (guix scripts hash)
#:use-module (guix base32)
#:use-module (guix ui)
#:use-module (guix utils)
#:use-module (rnrs io ports)
#:use-module (rnrs files)
#:use-module (ice-9 match)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-26)
#:use-module (srfi srfi-37)
#:export (guix-hash))
;;;
;;; Command-line options.
;;;
(define %default-options
;; Alist of default option values.
`((format . ,bytevector->nix-base32-string)))
(define (show-help)
(display (_ "Usage: guix hash [OPTION] FILE
Return the cryptographic hash of FILE.
Supported formats: 'nix-base32' (default), 'base32', and 'base16'
('hex' and 'hexadecimal' can be used as well).\n"))
(format #t (_ "
-f, --format=FMT write the hash in the given format"))
(newline)
(display (_ "
-h, --help display this help and exit"))
(display (_ "
-V, --version display version information and exit"))
(newline)
(show-bug-report-information))
(define %options
;; Specification of the command-line options.
(list (option '(#\f "format") #t #f
(lambda (opt name arg result)
(define fmt-proc
(match arg
("nix-base32"
bytevector->nix-base32-string)
("base32"
bytevector->base32-string)
((or "base16" "hex" "hexadecimal")
bytevector->base16-string)
(x
(leave (_ "unsupported hash format: ~a~%")
arg))))
(alist-cons 'format fmt-proc
(alist-delete 'format result))))
(option '(#\h "help") #f #f
(lambda args
(show-help)
(exit 0)))
(option '(#\V "version") #f #f
(lambda args
(show-version-and-exit "guix hash")))))
;;;
;;; Entry point.
;;;
(define (guix-hash . args)
(define (parse-options)
;; Return the alist of option values.
(args-fold args %options
(lambda (opt name arg result)
(leave (_ "unrecognized option: ~a~%")
name))
(lambda (arg result)
(alist-cons 'argument arg result))
%default-options))
(let* ((opts (parse-options))
(args (filter-map (match-lambda
(('argument . value)
value)
(_ #f))
(reverse opts)))
(fmt (assq-ref opts 'format)))
(match args
((file)
(catch 'system-error
(lambda ()
(format #t "~a~%"
(call-with-input-file file
(compose fmt sha256 get-bytevector-all))))
(lambda args
(leave (_ "~a~%")
(strerror (system-error-errno args))))))
(_
(leave (_ "wrong number of arguments~%"))))))

1
po/POTFILES.in
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@ -8,6 +8,7 @@ guix/scripts/build.scm
guix/scripts/download.scm
guix/scripts/package.scm
guix/scripts/gc.scm
guix/scripts/hash.scm
guix/scripts/pull.scm
guix/gnu-maintenance.scm
guix/ui.scm