@cindex @command{guix hash}
The @command{guix hash} command computes the hash 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
+distribution: it computes the cryptographic hash of one or more files, which can be
used in the definition of a package (@pxref{Defining Packages}).
The general syntax is:
@example
-guix hash @var{option} @var{file}
+guix hash @var{option} @var{file} ...
@end example
When @var{file} is @code{-} (a hyphen), @command{guix hash} computes the
;;; Copyright © 2013 Nikita Karetnikov <nikita@karetnikov.org>
;;; Copyright © 2016 Jan Nieuwenhuizen <janneke@gnu.org>
;;; Copyright © 2018 Tim Gesthuizen <tim.gesthuizen@yahoo.de>
+;;; Copyright © 2021 Simon Tournier <zimon.toutoune@gmail.com>
;;;
;;; This file is part of GNU Guix.
;;;
(define (file-hash file)
;; Compute the hash of FILE.
;; Catch and gracefully report possible '&nar-error' conditions.
- (with-error-handling
- (if (assoc-ref opts 'recursive?)
+ (if (assoc-ref opts 'recursive?)
+ (with-error-handling
(let-values (((port get-hash)
(open-hash-port (assoc-ref opts 'hash-algorithm))))
(write-file file port #:select? select?)
(force-output port)
- (get-hash))
- (match file
- ("-" (port-hash (assoc-ref opts 'hash-algorithm)
- (current-input-port)))
- (_ (call-with-input-file file
- (cute port-hash (assoc-ref opts 'hash-algorithm)
- <>)))))))
+ (get-hash)))
+ (catch 'system-error
+ (lambda _
+ (call-with-input-file file
+ (cute port-hash (assoc-ref opts 'hash-algorithm)
+ <>)))
+ (lambda args
+ (leave (G_ "~a ~a~%")
+ file
+ (strerror (system-error-errno args)))))))
+
+ (define (formatted-hash thing)
+ (match thing
+ ("-" (with-error-handling
+ (fmt (port-hash (assoc-ref opts 'hash-algorithm)
+ (current-input-port)))))
+ (_
+ (fmt (file-hash thing)))))
(match args
- ((file)
- (catch 'system-error
- (lambda ()
- (format #t "~a~%" (fmt (file-hash file))))
- (lambda args
- (leave (G_ "~a~%")
- (strerror (system-error-errno args))))))
- (x
- (leave (G_ "wrong number of arguments~%"))))))
+ (()
+ (leave (G_ "no arguments specified~%")))
+ (_
+ (for-each
+ (compose (cute format #t "~a~%" <>) formatted-hash)
+ args)))))
test `guix hash -H sha512 -f hex /dev/null` = cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e
test `guix hash -H sha1 -f base64 /dev/null` = "2jmj7l5rSw0yVb/vlWAYkK/YBwk="
+# Several files.
+test "`guix hash /dev/null "$abs_top_srcdir/README"`" = "`guix hash /dev/null ; guix hash "$abs_top_srcdir/README"`"
+
+# Zero files.
+! guix hash
+
! guix hash -H abcd1234 /dev/null
mkdir "$tmpdir"