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39bee8a2 | 1 | ;;; GNU Guix --- Functional package management for GNU |
ee8099f5 | 2 | ;;; Copyright © 2015, 2016, 2019 Ludovic Courtès <ludo@gnu.org> |
b16dbd13 | 3 | ;;; Copyright © 2015 Mathieu Lirzin <mthl@gnu.org> |
3c8396b5 | 4 | ;;; Copyright © 2020 Simon Tournier <zimon.toutoune@gmail.com> |
39bee8a2 LC |
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 edit) | |
22 | #:use-module (guix ui) | |
88981dd3 | 23 | #:use-module (guix scripts) |
3c8396b5 | 24 | #:use-module ((guix scripts build) #:select (%standard-build-options)) |
39bee8a2 | 25 | #:use-module (guix utils) |
39bee8a2 LC |
26 | #:use-module (gnu packages) |
27 | #:use-module (srfi srfi-1) | |
28 | #:use-module (srfi srfi-37) | |
29 | #:export (%editor | |
30 | guix-edit)) | |
31 | ||
32 | (define %options | |
3c8396b5 | 33 | (list (find (lambda (option) |
34 | (member "load-path" (option-names option))) | |
35 | %standard-build-options) | |
36 | (option '(#\h "help") #f #f | |
39bee8a2 LC |
37 | (lambda args |
38 | (show-help) | |
39 | (exit 0))) | |
40 | (option '(#\V "version") #f #f | |
41 | (lambda args | |
42 | (show-version-and-exit "guix edit"))))) | |
43 | ||
44 | (define (show-help) | |
69daee23 | 45 | (display (G_ "Usage: guix edit PACKAGE... |
6237b9fa | 46 | Start $VISUAL or $EDITOR to edit the definitions of PACKAGE...\n")) |
3c8396b5 | 47 | (newline) |
48 | (display (G_ " | |
49 | -L, --load-path=DIR prepend DIR to the package module search path")) | |
39bee8a2 | 50 | (newline) |
69daee23 | 51 | (display (G_ " |
39bee8a2 | 52 | -h, --help display this help and exit")) |
69daee23 | 53 | (display (G_ " |
39bee8a2 LC |
54 | -V, --version display version information and exit")) |
55 | (newline) | |
56 | (show-bug-report-information)) | |
57 | ||
58 | (define %editor | |
cd08fe42 ML |
59 | ;; XXX: It would be better to default to something more likely to be |
60 | ;; pre-installed on an average GNU system. Since Nano is not suited for | |
61 | ;; editing Scheme, Emacs is used instead. | |
62 | (make-parameter (or (getenv "VISUAL") (getenv "EDITOR") "emacs"))) | |
39bee8a2 LC |
63 | |
64 | (define (search-path* path file) | |
65 | "Like 'search-path' but exit if FILE is not found." | |
66 | (let ((absolute-file-name (search-path path file))) | |
67 | (unless absolute-file-name | |
68 | ;; Shouldn't happen unless somebody fiddled with the 'location' field. | |
69daee23 | 69 | (leave (G_ "file '~a' not found in search path ~s~%") |
39bee8a2 LC |
70 | file path)) |
71 | absolute-file-name)) | |
72 | ||
ee8099f5 LC |
73 | (define (location->location-specification location) |
74 | "Return the location specification for LOCATION for a typical editor command | |
67c920fa | 75 | line." |
ee8099f5 LC |
76 | (list (string-append "+" |
77 | (number->string | |
78 | (location-line location))) | |
79 | (search-path* %load-path (location-file location)))) | |
67c920fa | 80 | |
39bee8a2 LC |
81 | \f |
82 | (define (guix-edit . args) | |
00677a7e LC |
83 | (define (parse-arguments) |
84 | ;; Return the list of package names. | |
85 | (args-fold* args %options | |
86 | (lambda (opt name arg result) | |
69daee23 | 87 | (leave (G_ "~A: unrecognized option~%") name)) |
00677a7e LC |
88 | cons |
89 | '())) | |
90 | ||
39bee8a2 | 91 | (with-error-handling |
ee8099f5 LC |
92 | (let* ((specs (reverse (parse-arguments))) |
93 | (locations (map specification->location specs))) | |
650f1615 LC |
94 | |
95 | (catch 'system-error | |
96 | (lambda () | |
ee8099f5 LC |
97 | (let ((file-names (append-map location->location-specification |
98 | locations))) | |
b16dbd13 ML |
99 | ;; Use `system' instead of `exec' in order to sanely handle |
100 | ;; possible command line arguments in %EDITOR. | |
101 | (exit (system (string-join (cons (%editor) file-names)))))) | |
650f1615 LC |
102 | (lambda args |
103 | (let ((errno (system-error-errno args))) | |
69daee23 | 104 | (leave (G_ "failed to launch '~a': ~a~%") |
650f1615 | 105 | (%editor) (strerror errno)))))))) |