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authorLudovic Courtès <ludo@gnu.org>2013-01-18 01:06:47 +0100
committerLudovic Courtès <ludo@gnu.org>2013-01-18 01:07:53 +0100
commit59a43334a98babd6c776648967e48d7c44723639 (patch)
tree773b1410caede08cab50eb26b2fcf617da419c7c /gnu/packages.scm
parent1ffa7090b99dfd2f54fa883929c5e78d7852657a (diff)
distro: Rename (distro) to (gnu packages).
* distro.scm: Rename to... * gnu/packages.scm: ... this. Update all users accordingly. * Makefile.am (MODULES): Adjust accordingly. * po/POTFILES.in: Likewise.
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+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2012, 2013 Ludovic Courtès <ludo@gnu.org>
+;;;
+;;; This file is part of GNU Guix.
+;;;
+;;; GNU Guix is free software; you can redistribute it and/or modify it
+;;; under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation; either version 3 of the License, or (at
+;;; your option) any later version.
+;;;
+;;; GNU Guix is distributed in the hope that it will be useful, but
+;;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;;; GNU General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (gnu packages)
+ #:use-module (guix packages)
+ #:use-module (guix utils)
+ #:use-module (ice-9 ftw)
+ #:use-module (srfi srfi-1)
+ #:use-module (srfi srfi-26)
+ #:use-module (srfi srfi-39)
+ #:export (search-patch
+ search-bootstrap-binary
+ %patch-directory
+ %bootstrap-binaries-path
+ fold-packages
+ find-packages-by-name))
+
+;;; Commentary:
+;;;
+;;; General utilities for the software distribution---i.e., the modules under
+;;; (gnu packages ...).
+;;;
+;;; Code:
+
+(define _ (cut gettext <> "guix"))
+
+;; By default, we store patches and bootstrap binaries alongside Guile
+;; modules. This is so that these extra files can be found without
+;; requiring a special setup, such as a specific installation directory
+;; and an extra environment variable. One advantage of this setup is
+;; that everything just works in an auto-compilation setting.
+
+(define %patch-path
+ (make-parameter
+ (map (cut string-append <> "/gnu/packages/patches")
+ %load-path)))
+
+(define %bootstrap-binaries-path
+ (make-parameter
+ (map (cut string-append <> "/gnu/packages/bootstrap")
+ %load-path)))
+
+(define (search-patch file-name)
+ "Search the patch FILE-NAME."
+ (search-path (%patch-path) file-name))
+
+(define (search-bootstrap-binary file-name system)
+ "Search the bootstrap binary FILE-NAME for SYSTEM."
+ (search-path (%bootstrap-binaries-path)
+ (string-append system "/" file-name)))
+
+(define %distro-module-directory
+ ;; Absolute path of the (gnu packages ...) module root.
+ (string-append (dirname (search-path %load-path "gnu/packages.scm"))
+ "/packages"))
+
+(define (package-files)
+ "Return the list of files that implement distro modules."
+ (define prefix-len
+ (string-length
+ (dirname (dirname (search-path %load-path "gnu/packages.scm")))))
+
+ (file-system-fold (const #t) ; enter?
+ (lambda (path stat result) ; leaf
+ (if (string-suffix? ".scm" path)
+ (cons (substring path prefix-len) result)
+ result))
+ (lambda (path stat result) ; down
+ result)
+ (lambda (path stat result) ; up
+ result)
+ (const #f) ; skip
+ (lambda (path stat errno result)
+ (format (current-error-port)
+ (_ "warning: cannot access `~a': ~a~%")
+ path (strerror errno))
+ result)
+ '()
+ %distro-module-directory
+ stat))
+
+(define (package-modules)
+ "Return the list of modules that provide packages for the distribution."
+ (define not-slash
+ (char-set-complement (char-set #\/)))
+
+ (filter-map (lambda (path)
+ (let ((name (map string->symbol
+ (string-tokenize (string-drop-right path 4)
+ not-slash))))
+ (false-if-exception (resolve-interface name))))
+ (package-files)))
+
+(define (fold-packages proc init)
+ "Call (PROC PACKAGE RESULT) for each available package, using INIT as
+the initial value of RESULT."
+ (fold (lambda (module result)
+ (fold (lambda (var result)
+ (if (package? var)
+ (proc var result)
+ result))
+ result
+ (module-map (lambda (sym var)
+ (false-if-exception (variable-ref var)))
+ module)))
+ init
+ (package-modules)))
+
+(define* (find-packages-by-name name #:optional version)
+ "Return the list of packages with the given NAME. If VERSION is not #f,
+then only return packages whose version is equal to VERSION."
+ (define right-package?
+ (if version
+ (lambda (p)
+ (and (string=? (package-name p) name)
+ (string=? (package-version p) version)))
+ (lambda (p)
+ (string=? (package-name p) name))))
+
+ (fold-packages (lambda (package result)
+ (if (right-package? package)
+ (cons package result)
+ result))
+ '()))