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;;; Guix --- Nix package management from Guile. -*- coding: utf-8 -*-
;;; Copyright (C) 2012 Ludovic Courtès <ludo@gnu.org>
;;;
;;; This file is part of Guix.
;;;
;;; 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.
;;;
;;; 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 Guix. If not, see <http://www.gnu.org/licenses/>.
(define-module (guix packages)
#:use-module (guix utils)
#:use-module (guix store)
#:use-module (guix build-system)
#:use-module (ice-9 match)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-9 gnu)
#:use-module (srfi srfi-34)
#:use-module (srfi srfi-35)
#:export (origin
origin?
origin-uri
origin-method
origin-sha256
origin-file-name
base32
package
package?
package-name
package-version
package-full-name
package-source
package-build-system
package-arguments
package-inputs
package-native-inputs
package-propagated-inputs
package-outputs
package-search-paths
package-description
package-long-description
package-license
package-platforms
package-maintainers
package-properties
package-location
package-transitive-inputs
package-transitive-propagated-inputs
package-source-derivation
package-derivation
package-cross-derivation
&package-error
package-error?
package-error-package
&package-input-error
package-input-error?
package-error-invalid-input))
;;; Commentary:
;;;
;;; This module provides a high-level mechanism to define packages in a
;;; Guix-based distribution.
;;;
;;; Code:
;; The source of a package, such as a tarball URL and fetcher---called
;; "origin" to avoid name clash with `package-source', `source', etc.
(define-record-type* <origin>
origin make-origin
origin?
(uri origin-uri) ; string
(method origin-method) ; symbol
(sha256 origin-sha256) ; bytevector
(file-name origin-file-name (default #f))) ; optional file name
(define-syntax base32
(lambda (s)
"Return the bytevector corresponding to the given Nix-base32
representation."
(syntax-case s ()
((_ str)
(string? (syntax->datum #'str))
(with-syntax ((bv (nix-base32-string->bytevector
(syntax->datum #'str))))
#''bv)))))
;; A package.
(define-record-type* <package>
package make-package
package?
(name package-name) ; string
(version package-version) ; string
(source package-source) ; <origin> instance
(build-system package-build-system) ; build system
(arguments package-arguments ; arguments for the build method
(default '()))
(inputs package-inputs ; input packages or derivations
(default '()))
(propagated-inputs package-propagated-inputs ; same, but propagated
(default '()))
(native-inputs package-native-inputs ; native input packages/derivations
(default '()))
(self-native-input? package-self-native-input? ; whether to use itself as
; a native input when cross-
(default #f)) ; compiling
(outputs package-outputs ; list of strings
(default '("out")))
(search-paths package-search-paths ; list of (ENV-VAR (DIRS ...))
(default '())) ; tuples; see
; `set-path-environment-variable'
; (aka. "setup-hook")
(description package-description) ; one-line description
(long-description package-long-description) ; one or two paragraphs
(license package-license (default '()))
(home-page package-home-page)
(platforms package-platforms (default '()))
(maintainers package-maintainers (default '()))
(properties package-properties (default '())) ; alist for anything else
(location package-location
(default (and=> (current-source-location)
source-properties->location))))
(set-record-type-printer! <package>
(lambda (package port)
(let ((loc (package-location package))
(format simple-format))
(format port "#<package ~a-~a ~a:~a ~a>"
(package-name package)
(package-version package)
(location-file loc)
(location-line loc)
(number->string (object-address
package)
16)))))
;; Error conditions.
(define-condition-type &package-error &error
package-error?
(package package-error-package))
(define-condition-type &package-input-error &package-error
package-input-error?
(input package-error-invalid-input))
(define (package-full-name package)
"Return the full name of PACKAGE--i.e., `NAME-VERSION'."
(string-append (package-name package) "-" (package-version package)))
(define* (package-source-derivation store source
#:optional (system (%current-system)))
"Return the derivation path for SOURCE, a package source, for SYSTEM."
(match source
(($ <origin> uri method sha256 name)
(method store uri 'sha256 sha256 name
#:system system))))
(define (transitive-inputs inputs)
(let loop ((inputs inputs)
(result '()))
(match inputs
(()
(delete-duplicates (reverse result))) ; XXX: efficiency
(((and i (name (? package? p) sub ...)) rest ...)
(let ((t (map (match-lambda
((dep-name derivation ...)
(cons (string-append name "/" dep-name)
derivation)))
(package-propagated-inputs p))))
(loop (append t rest)
(append t (cons i result)))))
((input rest ...)
(loop rest (cons input result))))))
(define (package-transitive-inputs package)
"Return the transitive inputs of PACKAGE---i.e., its direct inputs along
with their propagated inputs, recursively."
(transitive-inputs (append (package-native-inputs package)
(package-inputs package)
(package-propagated-inputs package))))
(define (package-transitive-propagated-inputs package)
"Return the propagated inputs of PACKAGE, and their propagated inputs,
recursively."
(transitive-inputs (package-propagated-inputs package)))
;;;
;;; Package derivations.
;;;
(define %derivation-cache
;; Package to derivation-path mapping.
(make-weak-key-hash-table 100))
(define (cache package system drv)
"Memoize DRV as the derivation of PACKAGE on SYSTEM."
;; Use `hashq-set!' instead of `hash-set!' because `hash' returns the
;; same value for all structs (as of Guile 2.0.6), and because pointer
;; equality is sufficient in practice.
(hashq-set! %derivation-cache package `((,system . ,drv)))
drv)
(define (cached-derivation package system)
"Return the cached derivation path of PACKAGE for SYSTEM, or #f."
(match (hashq-ref %derivation-cache package)
((alist ...)
(assoc-ref alist system))
(#f #f)))
(define* (package-derivation store package
#:optional (system (%current-system)))
"Return the derivation of PACKAGE for SYSTEM."
(define (intern file)
;; Add FILE to the store. Set the `recursive?' bit to #t, so that
;; file permissions are preserved.
(add-to-store store (basename file)
#t #t "sha256" file))
(define expand-input
;; Expand the given input tuple such that it contains only
;; references to derivation paths or store paths.
(match-lambda
(((? string? name) (? package? package))
(list name (package-derivation store package system)))
(((? string? name) (? package? package)
(? string? sub-drv))
(list name (package-derivation store package system)
sub-drv))
(((? string? name)
(and (? string?) (? derivation-path?) drv))
(list name drv))
(((? string? name)
(and (? string?) (? file-exists? file)))
;; Add FILE to the store. When FILE is in the sub-directory of a
;; store path, it needs to be added anyway, so it can be used as a
;; source.
(list name (intern file)))
(((? string? name) (? origin? source))
(list name (package-source-derivation store source system)))
((and i ((? string? name) (? procedure? proc) sub-drv ...))
;; This form allows PROC to make a SYSTEM-dependent choice.
;; XXX: Currently PROC must return a .drv, a store path, a local
;; file name, or an <origin>. If it were allowed to return a
;; package, then `transitive-inputs' and co. would need to be
;; adjusted.
(let ((input (proc system)))
(if (or (string? input) (origin? input))
(expand-input (cons* name input sub-drv))
(raise (condition (&package-input-error
(package package)
(input i)))))))
(x
(raise (condition (&package-input-error
(package package)
(input x)))))))
(or (cached-derivation package system)
;; Compute the derivation and cache the result. Caching is
;; important because some derivations, such as the implicit inputs
;; of the GNU build system, will be queried many, many times in a
;; row.
(cache
package system
(match package
(($ <package> name version source (= build-system-builder builder)
args inputs propagated-inputs native-inputs self-native-input?
outputs)
;; TODO: For `search-paths', add a builder prologue that calls
;; `set-path-environment-variable'.
(let ((inputs (map expand-input
(package-transitive-inputs package))))
(apply builder
store (package-full-name package)
(and source
(package-source-derivation store source system))
inputs
#:outputs outputs #:system system
(if (procedure? args)
(args system)
args))))))))
(define* (package-cross-derivation store package)
;; TODO
#f)
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