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f2bf0407de
This is a followup to e2a903c807.
* gnu/packages.scm (find-newest-available-packages): New procedure.
556 lines
22 KiB
Scheme
556 lines
22 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019 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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mkdir-p))
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#:autoload (guix profiles) (packages->manifest)
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#:use-module (guix describe)
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#:use-module (guix deprecation)
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#:use-module (ice-9 vlist)
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#:use-module (ice-9 match)
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#:autoload (ice-9 binary-ports) (put-bytevector)
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#:autoload (system base compile) (compile)
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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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%default-package-module-path
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fold-packages
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fold-available-packages
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find-newest-available-packages
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find-packages-by-name
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find-package-locations
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find-best-packages-by-name
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specification->package
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specification->package+output
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specification->location
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specifications->manifest
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generate-package-cache))
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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. Since (gnu packages …) might
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;; live in a directory different from (guix), try to get the best match.
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(letrec-syntax ((dirname* (syntax-rules ()
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((_ file)
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(dirname file))
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((_ file head tail ...)
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(dirname (dirname* file tail ...)))))
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(try (syntax-rules ()
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((_ (file things ...) rest ...)
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(match (search-path %load-path file)
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(#f
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(try rest ...))
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(absolute
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(dirname* absolute things ...))))
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((_)
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#f))))
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(try ("gnu/packages/base.scm" gnu/ packages/)
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("gnu/packages.scm" gnu/)
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("guix.scm"))))
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(define %default-package-module-path
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;; Default search path for package modules.
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`((,%distro-root-directory . "gnu/packages")))
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(define (cache-is-authoritative?)
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"Return true if the pre-computed package cache is authoritative. It is not
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authoritative when entries have been added via GUIX_PACKAGE_PATH or '-L'
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flags."
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(equal? (%package-module-path)
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(append %default-package-module-path
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(package-path-entries))))
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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*-values (((not-colon)
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(char-set-complement (char-set #\:)))
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((environment)
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(string-tokenize (or (getenv "GUIX_PACKAGE_PATH") "")
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not-colon))
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((channels-scm channels-go)
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(package-path-entries)))
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;; Automatically add channels and items from $GUIX_PACKAGE_PATH to Guile's
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;; search path. For historical reasons, $GUIX_PACKAGE_PATH goes to the
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;; front; channels go to the back so that they don't override Guix' own
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;; modules.
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(set! %load-path
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(append environment %load-path channels-scm))
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(set! %load-compiled-path
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(append environment %load-compiled-path channels-go))
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(make-parameter
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(append environment
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%default-package-module-path
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channels-scm))))
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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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;; This procedure is used by Emacs-Guix up to 0.5.1.1, so keep it for now.
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;; See <https://github.com/alezost/guix.el/issues/30>.
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(define-deprecated find-newest-available-packages
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find-packages-by-name
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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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(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 (fold-available-packages proc init)
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"Fold PROC over the list of available packages. For each available package,
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PROC is called along these lines:
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(PROC NAME VERSION RESULT
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#:outputs OUTPUTS
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#:location LOCATION
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…)
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PROC can use #:allow-other-keys to ignore the bits it's not interested in.
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When a package cache is available, this procedure does not actually load any
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package module."
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(define cache
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(load-package-cache (current-profile)))
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(if (and cache (cache-is-authoritative?))
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(vhash-fold (lambda (name vector result)
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(match vector
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(#(name version module symbol outputs
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supported? deprecated?
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file line column)
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(proc name version result
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#:outputs outputs
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#:location (and file
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(location file line column))
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#:supported? supported?
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#:deprecated? deprecated?))))
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init
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cache)
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(fold-packages (lambda (package result)
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(proc (package-name package)
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(package-version package)
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result
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#:outputs (package-outputs package)
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#:location (package-location package)
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#:supported?
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(->bool
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(member (%current-system)
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(package-supported-systems package)))
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#:deprecated?
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(->bool
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(package-superseded package))))
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init)))
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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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#:warn
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warn-about-load-error))
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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 %package-cache-file
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;; Location of the package cache.
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"/lib/guix/package.cache")
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(define load-package-cache
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(mlambda (profile)
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"Attempt to load the package cache. On success return a vhash keyed by
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package names. Return #f on failure."
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(match profile
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(#f #f)
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(profile
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(catch 'system-error
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(lambda ()
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(define lst
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(load-compiled (string-append profile %package-cache-file)))
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(fold (lambda (item vhash)
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(match item
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(#(name version module symbol outputs
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supported? deprecated?
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file line column)
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(vhash-cons name item vhash))))
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vlist-null
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lst))
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(lambda args
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(if (= ENOENT (system-error-errno args))
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#f
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(apply throw args))))))))
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(define find-packages-by-name/direct ;bypass the cache
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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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(version-prefix? version (package-version package)))
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matching)
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matching)))))
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(define (cache-lookup cache name)
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"Lookup package NAME in CACHE. Return a list sorted in increasing version
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order."
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(define (package-version<? v1 v2)
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(version>? (vector-ref v2 1) (vector-ref v1 1)))
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(sort (vhash-fold* cons '() name cache)
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package-version<?))
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(define* (find-packages-by-name 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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(define cache
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(load-package-cache (current-profile)))
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(if (and (cache-is-authoritative?) cache)
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(match (cache-lookup cache name)
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(#f #f)
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((#(_ versions modules symbols _ _ _ _ _ _) ...)
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(fold (lambda (version* module symbol result)
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(if (or (not version)
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(version-prefix? version version*))
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(cons (module-ref (resolve-interface module)
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symbol)
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result)
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result))
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'()
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versions modules symbols)))
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(find-packages-by-name/direct name version)))
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(define* (find-package-locations name #:optional version)
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"Return a list of version/location pairs corresponding to each package
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matching NAME and VERSION."
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(define cache
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(load-package-cache (current-profile)))
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(if (and cache (cache-is-authoritative?))
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(match (cache-lookup cache name)
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(#f '())
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((#(name versions modules symbols outputs
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supported? deprecated?
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files lines columns) ...)
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(fold (lambda (version* file line column result)
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(if (and file
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(or (not version)
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(version-prefix? version version*)))
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(alist-cons version* (location file line column)
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result)
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result))
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'()
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versions files lines columns)))
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(map (lambda (package)
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(cons (package-version package) (package-location package)))
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(find-packages-by-name/direct name version))))
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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 (find-packages-by-name name)
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(()
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'())
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((matches ...)
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;; Return the subset of MATCHES with the higher version number.
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(let ((highest (package-version (first matches))))
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(take-while (lambda (p)
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(string=? (package-version p) highest))
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matches))))))
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(define (generate-package-cache directory)
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"Generate under DIRECTORY a cache of all the available packages.
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The primary purpose of the cache is to speed up package lookup by name such
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that we don't have to traverse and load all the package modules, thereby also
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reducing the memory footprint."
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(define cache-file
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(string-append directory %package-cache-file))
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(define (expand-cache module symbol variable result+seen)
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(match (false-if-exception (variable-ref variable))
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((? package? package)
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(match result+seen
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((result . seen)
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(if (or (vhash-assq package seen)
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(hidden-package? package))
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(cons result seen)
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(cons (cons `#(,(package-name package)
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,(package-version package)
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,(module-name module)
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,symbol
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,(package-outputs package)
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,(->bool
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(member (%current-system)
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(package-supported-systems package)))
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,(->bool (package-superseded package))
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,@(let ((loc (package-location package)))
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(if loc
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`(,(location-file loc)
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,(location-line loc)
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,(location-column loc))
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'(#f #f #f))))
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result)
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(vhash-consq package #t seen))))))
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(_
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result+seen)))
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(define exp
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(first
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(fold-module-public-variables* expand-cache
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(cons '() vlist-null)
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(all-modules (%package-module-path)
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#:warn
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warn-about-load-error))))
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(mkdir-p (dirname cache-file))
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(call-with-output-file cache-file
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(lambda (port)
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;; Store the cache as a '.go' file. This makes loading fast and reduces
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;; heap usage since some of the static data is directly mmapped.
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(put-bytevector port
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(compile `'(,@exp)
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#:to 'bytecode
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#:opts '(#:to-file? #t)))))
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cache-file)
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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->location spec)
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"Return the location of the highest-numbered package matching SPEC, a
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specification such as \"guile@2\" or \"emacs\"."
|
||
(let-values (((name version) (package-name->name+version spec)))
|
||
(match (find-package-locations name version)
|
||
(()
|
||
(if version
|
||
(leave (G_ "~A: package not found for version ~a~%") name version)
|
||
(leave (G_ "~A: unknown package~%") name)))
|
||
(lst
|
||
(let* ((highest (match lst (((version . _) _ ...) version)))
|
||
(locations (take-while (match-lambda
|
||
((version . location)
|
||
(string=? version highest)))
|
||
lst)))
|
||
(match locations
|
||
(((version . location) . rest)
|
||
(unless (null? rest)
|
||
(warning (G_ "ambiguous package specification `~a'~%") spec)
|
||
(warning (G_ "choosing ~a@~a from ~a~%")
|
||
name version
|
||
(location->string location)))
|
||
location)))))))
|
||
|
||
(define* (specification->package+output spec #:optional (output "out"))
|
||
"Return the package and output specified by SPEC, or #f and #f; SPEC may
|
||
optionally contain a version number and an output name, as in these examples:
|
||
|
||
guile
|
||
guile@2.0.9
|
||
guile:debug
|
||
guile@2.0.9:debug
|
||
|
||
If SPEC does not specify a version number, return the preferred newest
|
||
version; if SPEC does not specify an output, return OUTPUT."
|
||
(let-values (((name version sub-drv)
|
||
(package-specification->name+version+output spec output)))
|
||
(match (%find-package spec name version)
|
||
(#f
|
||
(values #f #f))
|
||
(package
|
||
(if (member sub-drv (package-outputs package))
|
||
(values package sub-drv)
|
||
(leave (G_ "package `~a' lacks output `~a'~%")
|
||
(package-full-name package)
|
||
sub-drv))))))
|
||
|
||
(define (specifications->manifest specs)
|
||
"Given SPECS, a list of specifications such as \"emacs@25.2\" or
|
||
\"guile:debug\", return a profile manifest."
|
||
;; This procedure exists mostly so users of 'guix package -m' don't have to
|
||
;; fiddle with multiple-value returns.
|
||
(packages->manifest
|
||
(map (compose list specification->package+output) specs)))
|