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1 | ;;; Guix --- Nix package management from Guile. -*- coding: utf-8 -*- |
2 | ;;; Copyright (C) 2012 Ludovic Courtès <ludo@gnu.org> | |
3 | ;;; | |
4 | ;;; This file is part of Guix. | |
5 | ;;; | |
6 | ;;; Guix is free software; you can redistribute it and/or modify it | |
7 | ;;; under the terms of the GNU General Public License as published by | |
8 | ;;; the Free Software Foundation; either version 3 of the License, or (at | |
9 | ;;; your option) any later version. | |
10 | ;;; | |
11 | ;;; Guix is distributed in the hope that it will be useful, but | |
12 | ;;; WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | ;;; GNU General Public License for more details. | |
15 | ;;; | |
16 | ;;; You should have received a copy of the GNU General Public License | |
17 | ;;; along with Guix. If not, see <http://www.gnu.org/licenses/>. | |
18 | ||
19 | (define-module (guix ui) | |
20 | #:use-module (guix utils) | |
21 | #:use-module (guix store) | |
22 | #:use-module (guix packages) | |
23 | #:use-module (srfi srfi-26) | |
24 | #:use-module (srfi srfi-34) | |
25 | #:export (_ | |
26 | N_ | |
27 | leave | |
28 | call-with-error-handling | |
29 | with-error-handling)) | |
30 | ||
31 | ;;; Commentary: | |
32 | ;;; | |
33 | ;;; User interface facilities for command-line tools. | |
34 | ;;; | |
35 | ;;; Code: | |
36 | ||
37 | (define %gettext-domain | |
38 | "guix") | |
39 | ||
40 | (define _ (cut gettext <> %gettext-domain)) | |
41 | (define N_ (cut ngettext <> <> <> %gettext-domain)) | |
42 | ||
43 | (define-syntax-rule (leave fmt args ...) | |
44 | "Format FMT and ARGS to the error port and exit." | |
45 | (begin | |
46 | (format (current-error-port) fmt args ...) | |
47 | (exit 1))) | |
48 | ||
49 | (define (call-with-error-handling thunk) | |
50 | "Call THUNK within a user-friendly error handler." | |
51 | (guard (c ((package-input-error? c) | |
52 | (let* ((package (package-error-package c)) | |
53 | (input (package-error-invalid-input c)) | |
54 | (location (package-location package)) | |
55 | (file (location-file location)) | |
56 | (line (location-line location)) | |
57 | (column (location-column location))) | |
58 | (leave (_ "~a:~a:~a: error: package `~a' has an invalid input: ~s~%") | |
59 | file line column | |
60 | (package-full-name package) input))) | |
61 | ((nix-protocol-error? c) | |
62 | ;; FIXME: Server-provided error messages aren't i18n'd. | |
63 | (leave (_ "error: build failed: ~a~%") | |
64 | (nix-protocol-error-message c)))) | |
65 | (thunk))) | |
66 | ||
67 | (define-syntax with-error-handling | |
68 | (syntax-rules () | |
69 | "Run BODY within a user-friendly error condition handler." | |
70 | ((_ body ...) | |
71 | (call-with-error-handling | |
72 | (lambda () | |
73 | body ...))))) | |
74 | ||
75 | ;;; ui.scm ends here |