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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 (distro) | |
20 | #:use-module (guix packages) | |
800cdeef | 21 | #:use-module (guix utils) |
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22 | #:use-module (ice-9 ftw) |
23 | #:use-module (srfi srfi-1) | |
24 | #:use-module (srfi srfi-26) | |
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25 | #:use-module (srfi srfi-39) |
26 | #:export (search-patch | |
27 | %patch-directory | |
28 | find-packages-by-name)) | |
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29 | |
30 | ;;; Commentary: | |
31 | ;;; | |
32 | ;;; General utilities for the software distribution---i.e., the modules under | |
33 | ;;; (distro ...). | |
34 | ;;; | |
35 | ;;; Code: | |
36 | ||
37 | (define _ (cut gettext <> "guix")) | |
38 | ||
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39 | (define %patch-directory |
40 | (make-parameter | |
41 | (or (getenv "DISTRO_PATCH_DIRECTORY") | |
42 | (compile-time-value (getenv "DISTRO_INSTALLED_PATCH_DIRECTORY"))))) | |
43 | ||
44 | (define (search-patch file-name) | |
45 | "Search the patch FILE-NAME." | |
46 | (search-path (list (%patch-directory)) file-name)) | |
47 | ||
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48 | (define %distro-module-directory |
49 | ;; Absolute path of the (distro ...) module root. | |
50 | (string-append (dirname (search-path %load-path "distro.scm")) | |
1f455fdc | 51 | "/distro/packages")) |
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52 | |
53 | (define (package-files) | |
54 | "Return the list of files that implement distro modules." | |
55 | (define prefix-len | |
1722d680 | 56 | (string-length (dirname (search-path %load-path "distro.scm")))) |
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57 | |
58 | (file-system-fold (const #t) ; enter? | |
59 | (lambda (path stat result) ; leaf | |
60 | (if (string-suffix? ".scm" path) | |
61 | (cons (substring path prefix-len) result) | |
62 | result)) | |
63 | (lambda (path stat result) ; down | |
64 | result) | |
65 | (lambda (path stat result) ; up | |
66 | result) | |
67 | (const #f) ; skip | |
68 | (lambda (path stat errno result) | |
69 | (format (current-error-port) | |
49feac7a | 70 | (_ "warning: cannot access `~a': ~a~%") |
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71 | path (strerror errno)) |
72 | result) | |
73 | '() | |
74 | %distro-module-directory | |
75 | stat)) | |
76 | ||
77 | (define (package-modules) | |
78 | "Return the list of modules that provide packages for the distribution." | |
79 | (define not-slash | |
80 | (char-set-complement (char-set #\/))) | |
81 | ||
82 | (filter-map (lambda (path) | |
83 | (let ((name (map string->symbol | |
84 | (string-tokenize (string-drop-right path 4) | |
85 | not-slash)))) | |
86 | (false-if-exception (resolve-interface name)))) | |
87 | (package-files))) | |
88 | ||
89 | (define* (find-packages-by-name name #:optional version) | |
90 | "Return the list of packages with the given NAME. If VERSION is not #f, | |
91 | then only return packages whose version is equal to VERSION." | |
92 | (define right-package? | |
93 | (if version | |
94 | (lambda (p) | |
95 | (and (package? p) | |
96 | (string=? (package-name p) name) | |
97 | (string=? (package-version p) version))) | |
98 | (lambda (p) | |
99 | (and (package? p) | |
100 | (string=? (package-name p) name))))) | |
101 | ||
102 | (append-map (lambda (module) | |
103 | (filter right-package? | |
104 | (module-map (lambda (sym var) | |
105 | (variable-ref var)) | |
106 | module))) | |
107 | (package-modules))) |