cd295fbe17
This reverts commit 5f93d97005.
'guix pull' would fail because (guix self) needs 'scheme-files'
from (guix discovery), which was not exported until now.
293 lines
11 KiB
Scheme
293 lines
11 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2012, 2013, 2014, 2015, 2016, 2017 Ludovic Courtès <ludo@gnu.org>
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;;; Copyright © 2013 Mark H Weaver <mhw@netris.org>
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;;; Copyright © 2014 Eric Bavier <bavier@member.fsf.org>
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;;; Copyright © 2016, 2017 Alex Kost <alezost@gmail.com>
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;;; Copyright © 2016 Mathieu Lirzin <mthl@gnu.org>
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;;;
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;;; This file is part of GNU Guix.
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;;;
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;;; GNU Guix is free software; you can redistribute it and/or modify it
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;;; under the terms of the GNU General Public License as published by
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;;; the Free Software Foundation; either version 3 of the License, or (at
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;;; your option) any later version.
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;;;
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;;; GNU Guix is distributed in the hope that it will be useful, but
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;;; WITHOUT ANY WARRANTY; without even the implied warranty of
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;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;;; GNU General Public License for more details.
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;;;
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;;; You should have received a copy of the GNU General Public License
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;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
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(define-module (gnu packages)
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#:use-module (guix packages)
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#:use-module (guix ui)
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#:use-module (guix utils)
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#:use-module (guix discovery)
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#:use-module (guix memoization)
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#:use-module ((guix build utils)
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#:select ((package-name->name+version
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. hyphen-separated-name->name+version)))
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#:autoload (guix profiles) (packages->manifest)
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#:use-module (ice-9 vlist)
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#:use-module (ice-9 match)
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#:use-module (srfi srfi-1)
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#:use-module (srfi srfi-11)
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#:use-module (srfi srfi-26)
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#:use-module (srfi srfi-34)
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#:use-module (srfi srfi-35)
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#:use-module (srfi srfi-39)
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#:export (search-patch
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search-patches
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search-auxiliary-file
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search-bootstrap-binary
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%patch-path
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%auxiliary-files-path
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%bootstrap-binaries-path
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%package-module-path
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fold-packages
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find-packages-by-name
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find-best-packages-by-name
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find-newest-available-packages
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specification->package
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specification->package+output
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specifications->manifest))
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;;; Commentary:
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;;;
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;;; General utilities for the software distribution---i.e., the modules under
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;;; (gnu packages ...).
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;;;
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;;; Code:
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;; By default, we store patches, auxiliary files and bootstrap binaries
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;; alongside Guile modules. This is so that these extra files can be
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;; found without requiring a special setup, such as a specific
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;; installation directory and an extra environment variable. One
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;; advantage of this setup is that everything just works in an
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;; auto-compilation setting.
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(define %bootstrap-binaries-path
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(make-parameter
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(map (cut string-append <> "/gnu/packages/bootstrap")
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%load-path)))
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(define %auxiliary-files-path
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(make-parameter
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(map (cut string-append <> "/gnu/packages/aux-files")
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%load-path)))
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(define (search-auxiliary-file file-name)
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"Search the auxiliary FILE-NAME. Return #f if not found."
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(search-path (%auxiliary-files-path) file-name))
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(define (search-patch file-name)
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"Search the patch FILE-NAME. Raise an error if not found."
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(or (search-path (%patch-path) file-name)
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(raise (condition
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(&message (message (format #f (G_ "~a: patch not found")
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file-name)))))))
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(define-syntax-rule (search-patches file-name ...)
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"Return the list of absolute file names corresponding to each
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FILE-NAME found in %PATCH-PATH."
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(list (search-patch file-name) ...))
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(define (search-bootstrap-binary file-name system)
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"Search the bootstrap binary FILE-NAME for SYSTEM. Raise an error if not
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found."
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(or (search-path (%bootstrap-binaries-path)
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(string-append system "/" file-name))
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(raise (condition
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(&message
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(message
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(format #f (G_ "could not find bootstrap binary '~a' \
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for system '~a'")
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file-name system)))))))
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(define %distro-root-directory
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;; Absolute file name of the module hierarchy.
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(dirname (search-path %load-path "guix.scm")))
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(define %package-module-path
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;; Search path for package modules. Each item must be either a directory
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;; name or a pair whose car is a directory and whose cdr is a sub-directory
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;; to narrow the search.
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(let* ((not-colon (char-set-complement (char-set #\:)))
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(environment (string-tokenize (or (getenv "GUIX_PACKAGE_PATH") "")
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not-colon)))
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;; Automatically add items from $GUIX_PACKAGE_PATH to Guile's search path.
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(for-each (lambda (directory)
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(set! %load-path (cons directory %load-path))
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(set! %load-compiled-path
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(cons directory %load-compiled-path)))
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environment)
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(make-parameter
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(append environment `((,%distro-root-directory . "gnu/packages"))))))
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(define %patch-path
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;; Define it after '%package-module-path' so that '%load-path' contains user
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;; directories, allowing patches in $GUIX_PACKAGE_PATH to be found.
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(make-parameter
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(map (lambda (directory)
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(if (string=? directory %distro-root-directory)
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(string-append directory "/gnu/packages/patches")
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directory))
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%load-path)))
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(define* (fold-packages proc init
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#:optional
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(modules (all-modules (%package-module-path)))
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#:key (select? (negate hidden-package?)))
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"Call (PROC PACKAGE RESULT) for each available package defined in one of
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MODULES that matches SELECT?, using INIT as the initial value of RESULT. It
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is guaranteed to never traverse the same package twice."
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(fold-module-public-variables (lambda (object result)
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(if (and (package? object) (select? object))
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(proc object result)
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result))
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init
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modules))
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(define find-packages-by-name
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(let ((packages (delay
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(fold-packages (lambda (p r)
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(vhash-cons (package-name p) p r))
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vlist-null)))
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(version>? (lambda (p1 p2)
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(version>? (package-version p1) (package-version p2)))))
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(lambda* (name #:optional version)
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"Return the list of packages with the given NAME. If VERSION is not #f,
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then only return packages whose version is prefixed by VERSION, sorted in
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decreasing version order."
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(let ((matching (sort (vhash-fold* cons '() name (force packages))
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version>?)))
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(if version
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(filter (lambda (package)
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(string-prefix? version (package-version package)))
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matching)
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matching)))))
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(define find-newest-available-packages
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(mlambda ()
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"Return a vhash keyed by package names, and with
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associated values of the form
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(newest-version newest-package ...)
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where the preferred package is listed first."
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;; FIXME: Currently, the preferred package is whichever one
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;; was found last by 'fold-packages'. Find a better solution.
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(fold-packages (lambda (p r)
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(let ((name (package-name p))
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(version (package-version p)))
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(match (vhash-assoc name r)
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((_ newest-so-far . pkgs)
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(case (version-compare version newest-so-far)
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((>) (vhash-cons name `(,version ,p) r))
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((=) (vhash-cons name `(,version ,p ,@pkgs) r))
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((<) r)))
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(#f (vhash-cons name `(,version ,p) r)))))
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vlist-null)))
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(define (find-best-packages-by-name name version)
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"If version is #f, return the list of packages named NAME with the highest
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version numbers; otherwise, return the list of packages named NAME and at
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VERSION."
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(if version
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(find-packages-by-name name version)
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(match (vhash-assoc name (find-newest-available-packages))
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((_ version pkgs ...) pkgs)
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(#f '()))))
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(define %sigint-prompt
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;; The prompt to jump to upon SIGINT.
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(make-prompt-tag "interruptible"))
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(define (call-with-sigint-handler thunk handler)
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"Call THUNK and return its value. Upon SIGINT, call HANDLER with the signal
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number in the context of the continuation of the call to this function, and
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return its return value."
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(call-with-prompt %sigint-prompt
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(lambda ()
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(sigaction SIGINT
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(lambda (signum)
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(sigaction SIGINT SIG_DFL)
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(abort-to-prompt %sigint-prompt signum)))
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(dynamic-wind
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(const #t)
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thunk
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(cut sigaction SIGINT SIG_DFL)))
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(lambda (k signum)
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(handler signum))))
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;;;
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;;; Package specification.
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;;;
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(define* (%find-package spec name version)
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(match (find-best-packages-by-name name version)
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((pkg . pkg*)
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(unless (null? pkg*)
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(warning (G_ "ambiguous package specification `~a'~%") spec)
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(warning (G_ "choosing ~a@~a from ~a~%")
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(package-name pkg) (package-version pkg)
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(location->string (package-location pkg))))
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(match (package-superseded pkg)
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((? package? new)
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(info (G_ "package '~a' has been superseded by '~a'~%")
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(package-name pkg) (package-name new))
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new)
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(#f
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pkg)))
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(x
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(if version
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(leave (G_ "~A: package not found for version ~a~%") name version)
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(leave (G_ "~A: unknown package~%") name)))))
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(define (specification->package spec)
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"Return a package matching SPEC. SPEC may be a package name, or a package
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name followed by an at-sign and a version number. If the version number is not
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present, return the preferred newest version."
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(let-values (((name version) (package-name->name+version spec)))
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(%find-package spec name version)))
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(define* (specification->package+output spec #:optional (output "out"))
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"Return the package and output specified by SPEC, or #f and #f; SPEC may
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optionally contain a version number and an output name, as in these examples:
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guile
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guile@2.0.9
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guile:debug
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guile@2.0.9:debug
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If SPEC does not specify a version number, return the preferred newest
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version; if SPEC does not specify an output, return OUTPUT."
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(let-values (((name version sub-drv)
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(package-specification->name+version+output spec output)))
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(match (%find-package spec name version)
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(#f
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(values #f #f))
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(package
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(if (member sub-drv (package-outputs package))
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(values package sub-drv)
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(leave (G_ "package `~a' lacks output `~a'~%")
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(package-full-name package)
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sub-drv))))))
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(define (specifications->manifest specs)
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"Given SPECS, a list of specifications such as \"emacs@25.2\" or
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\"guile:debug\", return a profile manifest."
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;; This procedure exists mostly so users of 'guix package -m' don't have to
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;; fiddle with multiple-value returns.
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(packages->manifest
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(map (compose list specification->package+output) specs)))
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