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6c365eca | 1 | ;;; GNU Guix --- Functional package management for GNU |
eeb05e87 | 2 | ;;; Copyright © 2012, 2013, 2014, 2016, 2017 Ludovic Courtès <ludo@gnu.org> |
6c365eca | 3 | ;;; Copyright © 2013 Nikita Karetnikov <nikita@karetnikov.org> |
392a4e12 | 4 | ;;; Copyright © 2016 Jan Nieuwenhuizen <janneke@gnu.org> |
6c365eca NK |
5 | ;;; |
6 | ;;; This file is part of GNU Guix. | |
7 | ;;; | |
8 | ;;; GNU Guix is free software; you can redistribute it and/or modify it | |
9 | ;;; under the terms of the GNU General Public License as published by | |
10 | ;;; the Free Software Foundation; either version 3 of the License, or (at | |
11 | ;;; your option) any later version. | |
12 | ;;; | |
13 | ;;; GNU Guix is distributed in the hope that it will be useful, but | |
14 | ;;; WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | ;;; GNU General Public License for more details. | |
17 | ;;; | |
18 | ;;; You should have received a copy of the GNU General Public License | |
19 | ;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>. | |
20 | ||
21 | (define-module (guix scripts hash) | |
72626a71 LC |
22 | #:use-module (guix base32) |
23 | #:use-module (guix hash) | |
0363991a | 24 | #:use-module (guix serialization) |
72626a71 | 25 | #:use-module (guix ui) |
88981dd3 | 26 | #:use-module (guix scripts) |
4c0c4db0 | 27 | #:use-module (guix base16) |
2535635f | 28 | #:use-module (ice-9 binary-ports) |
72626a71 LC |
29 | #:use-module (rnrs files) |
30 | #:use-module (ice-9 match) | |
31 | #:use-module (srfi srfi-1) | |
3140f2df | 32 | #:use-module (srfi srfi-11) |
72626a71 LC |
33 | #:use-module (srfi srfi-26) |
34 | #:use-module (srfi srfi-37) | |
35 | #:export (guix-hash)) | |
6c365eca NK |
36 | |
37 | \f | |
38 | ;;; | |
39 | ;;; Command-line options. | |
40 | ;;; | |
41 | ||
42 | (define %default-options | |
43 | ;; Alist of default option values. | |
44 | `((format . ,bytevector->nix-base32-string))) | |
45 | ||
46 | (define (show-help) | |
69daee23 | 47 | (display (G_ "Usage: guix hash [OPTION] FILE |
6c365eca NK |
48 | Return the cryptographic hash of FILE. |
49 | ||
3140f2df LC |
50 | Supported formats: 'nix-base32' (default), 'base32', and 'base16' ('hex' |
51 | and 'hexadecimal' can be used as well).\n")) | |
69daee23 | 52 | (format #t (G_ " |
392a4e12 | 53 | -x, --exclude-vcs exclude version control directories")) |
69daee23 | 54 | (format #t (G_ " |
6c365eca | 55 | -f, --format=FMT write the hash in the given format")) |
69daee23 | 56 | (format #t (G_ " |
3140f2df | 57 | -r, --recursive compute the hash on FILE recursively")) |
6c365eca | 58 | (newline) |
69daee23 | 59 | (display (G_ " |
6c365eca | 60 | -h, --help display this help and exit")) |
69daee23 | 61 | (display (G_ " |
6c365eca NK |
62 | -V, --version display version information and exit")) |
63 | (newline) | |
64 | (show-bug-report-information)) | |
65 | ||
66 | (define %options | |
67 | ;; Specification of the command-line options. | |
392a4e12 JN |
68 | (list (option '(#\x "exclude-vcs") #f #f |
69 | (lambda (opt name arg result) | |
70 | (alist-cons 'exclude-vcs? #t result))) | |
71 | (option '(#\f "format") #t #f | |
6c365eca NK |
72 | (lambda (opt name arg result) |
73 | (define fmt-proc | |
74 | (match arg | |
75 | ("nix-base32" | |
76 | bytevector->nix-base32-string) | |
77 | ("base32" | |
78 | bytevector->base32-string) | |
79 | ((or "base16" "hex" "hexadecimal") | |
80 | bytevector->base16-string) | |
81 | (x | |
69daee23 | 82 | (leave (G_ "unsupported hash format: ~a~%") |
6c365eca NK |
83 | arg)))) |
84 | ||
85 | (alist-cons 'format fmt-proc | |
86 | (alist-delete 'format result)))) | |
3140f2df LC |
87 | (option '(#\r "recursive") #f #f |
88 | (lambda (opt name arg result) | |
89 | (alist-cons 'recursive? #t result))) | |
6c365eca NK |
90 | (option '(#\h "help") #f #f |
91 | (lambda args | |
92 | (show-help) | |
93 | (exit 0))) | |
94 | (option '(#\V "version") #f #f | |
95 | (lambda args | |
96 | (show-version-and-exit "guix hash"))))) | |
97 | ||
98 | ||
99 | \f | |
100 | ;;; | |
101 | ;;; Entry point. | |
102 | ;;; | |
103 | ||
104 | (define (guix-hash . args) | |
105 | (define (parse-options) | |
106 | ;; Return the alist of option values. | |
a5975ced LC |
107 | (args-fold* args %options |
108 | (lambda (opt name arg result) | |
69daee23 | 109 | (leave (G_ "unrecognized option: ~a~%") |
a5975ced LC |
110 | name)) |
111 | (lambda (arg result) | |
112 | (alist-cons 'argument arg result)) | |
113 | %default-options)) | |
6c365eca | 114 | |
392a4e12 JN |
115 | (define (vcs-file? file stat) |
116 | (case (stat:type stat) | |
117 | ((directory) | |
118 | (member (basename file) '(".bzr" ".git" ".hg" ".svn" "CVS"))) | |
eeb05e87 LC |
119 | ((regular) |
120 | ;; Git sub-modules have a '.git' file that is a regular text file. | |
121 | (string=? (basename file) ".git")) | |
392a4e12 JN |
122 | (else |
123 | #f))) | |
124 | ||
ccbce848 LC |
125 | (let* ((opts (parse-options)) |
126 | (args (filter-map (match-lambda | |
127 | (('argument . value) | |
128 | value) | |
129 | (_ #f)) | |
130 | (reverse opts))) | |
392a4e12 JN |
131 | (fmt (assq-ref opts 'format)) |
132 | (select? (if (assq-ref opts 'exclude-vcs?) | |
133 | (negate vcs-file?) | |
134 | (const #t)))) | |
ccbce848 | 135 | |
3140f2df LC |
136 | (define (file-hash file) |
137 | ;; Compute the hash of FILE. | |
138 | ;; Catch and gracefully report possible '&nar-error' conditions. | |
139 | (with-error-handling | |
140 | (if (assoc-ref opts 'recursive?) | |
141 | (let-values (((port get-hash) (open-sha256-port))) | |
392a4e12 | 142 | (write-file file port #:select? select?) |
2535635f | 143 | (force-output port) |
3140f2df | 144 | (get-hash)) |
343dc117 LC |
145 | (match file |
146 | ("-" (port-sha256 (current-input-port))) | |
147 | (_ (call-with-input-file file port-sha256)))))) | |
3140f2df | 148 | |
ccbce848 LC |
149 | (match args |
150 | ((file) | |
151 | (catch 'system-error | |
152 | (lambda () | |
3140f2df | 153 | (format #t "~a~%" (fmt (file-hash file)))) |
ccbce848 | 154 | (lambda args |
69daee23 | 155 | (leave (G_ "~a~%") |
ccbce848 | 156 | (strerror (system-error-errno args)))))) |
e465d9e1 | 157 | (x |
69daee23 | 158 | (leave (G_ "wrong number of arguments~%")))))) |