321 lines
12 KiB
Scheme
321 lines
12 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2012, 2013 Ludovic Courtès <ludo@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 (guix packages)
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#:use-module (guix utils)
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#:use-module (guix store)
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#:use-module (guix base32)
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#:use-module (guix derivations)
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#:use-module (guix build-system)
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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-9 gnu)
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#:use-module (srfi srfi-11)
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#:use-module (srfi srfi-34)
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#:use-module (srfi srfi-35)
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#:re-export (%current-system)
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#:export (origin
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origin?
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origin-uri
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origin-method
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origin-sha256
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origin-file-name
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base32
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package
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package?
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package-name
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package-version
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package-full-name
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package-source
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package-build-system
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package-arguments
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package-inputs
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package-native-inputs
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package-propagated-inputs
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package-outputs
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package-search-paths
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package-synopsis
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package-description
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package-license
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package-home-page
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package-platforms
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package-maintainers
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package-properties
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package-location
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package-transitive-inputs
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package-transitive-propagated-inputs
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package-source-derivation
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package-derivation
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package-cross-derivation
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package-output
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&package-error
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package-error?
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package-error-package
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&package-input-error
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package-input-error?
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package-error-invalid-input))
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;;; Commentary:
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;;;
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;;; This module provides a high-level mechanism to define packages in a
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;;; Guix-based distribution.
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;;;
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;;; Code:
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;; The source of a package, such as a tarball URL and fetcher---called
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;; "origin" to avoid name clash with `package-source', `source', etc.
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(define-record-type* <origin>
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origin make-origin
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origin?
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(uri origin-uri) ; string
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(method origin-method) ; symbol
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(sha256 origin-sha256) ; bytevector
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(file-name origin-file-name (default #f))) ; optional file name
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(define-syntax base32
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(lambda (s)
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"Return the bytevector corresponding to the given Nix-base32
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representation."
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(syntax-case s ()
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((_ str)
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(string? (syntax->datum #'str))
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;; A literal string: do the conversion at expansion time.
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(with-syntax ((bv (nix-base32-string->bytevector
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(syntax->datum #'str))))
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#''bv))
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((_ str)
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#'(nix-base32-string->bytevector str)))))
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;; A package.
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(define-record-type* <package>
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package make-package
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package?
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(name package-name) ; string
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(version package-version) ; string
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(source package-source) ; <origin> instance
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(build-system package-build-system) ; build system
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(arguments package-arguments ; arguments for the build method
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(default '()) (thunked))
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(inputs package-inputs ; input packages or derivations
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(default '()) (thunked))
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(propagated-inputs package-propagated-inputs ; same, but propagated
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(default '()))
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(native-inputs package-native-inputs ; native input packages/derivations
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(default '()))
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(self-native-input? package-self-native-input? ; whether to use itself as
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; a native input when cross-
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(default #f)) ; compiling
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(outputs package-outputs ; list of strings
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(default '("out")))
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(search-paths package-search-paths ; list of (ENV-VAR (DIRS ...))
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(default '())) ; tuples; see
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; `set-path-environment-variable'
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; (aka. "setup-hook")
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(synopsis package-synopsis) ; one-line description
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(description package-description) ; one or two paragraphs
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(license package-license)
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(home-page package-home-page)
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(platforms package-platforms (default '()))
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(maintainers package-maintainers (default '()))
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(properties package-properties (default '())) ; alist for anything else
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(location package-location
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(default (and=> (current-source-location)
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source-properties->location))))
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(set-record-type-printer! <package>
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(lambda (package port)
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(let ((loc (package-location package))
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(format simple-format))
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(format port "#<package ~a-~a ~a:~a ~a>"
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(package-name package)
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(package-version package)
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(location-file loc)
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(location-line loc)
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(number->string (object-address
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package)
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16)))))
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;; Error conditions.
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(define-condition-type &package-error &error
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package-error?
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(package package-error-package))
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(define-condition-type &package-input-error &package-error
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package-input-error?
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(input package-error-invalid-input))
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(define (package-full-name package)
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"Return the full name of PACKAGE--i.e., `NAME-VERSION'."
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(string-append (package-name package) "-" (package-version package)))
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(define* (package-source-derivation store source
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#:optional (system (%current-system)))
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"Return the derivation path for SOURCE, a package source, for SYSTEM."
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(match source
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(($ <origin> uri method sha256 name)
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(method store uri 'sha256 sha256 name
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#:system system))))
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(define (transitive-inputs inputs)
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(let loop ((inputs inputs)
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(result '()))
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(match inputs
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(()
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(delete-duplicates (reverse result))) ; XXX: efficiency
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(((and i (name (? package? p) sub ...)) rest ...)
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(let ((t (map (match-lambda
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((dep-name derivation ...)
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(cons (string-append name "/" dep-name)
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derivation)))
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(package-propagated-inputs p))))
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(loop (append t rest)
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(append t (cons i result)))))
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((input rest ...)
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(loop rest (cons input result))))))
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(define (package-transitive-inputs package)
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"Return the transitive inputs of PACKAGE---i.e., its direct inputs along
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with their propagated inputs, recursively."
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(transitive-inputs (append (package-native-inputs package)
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(package-inputs package)
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(package-propagated-inputs package))))
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(define (package-transitive-propagated-inputs package)
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"Return the propagated inputs of PACKAGE, and their propagated inputs,
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recursively."
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(transitive-inputs (package-propagated-inputs package)))
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;;;
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;;; Package derivations.
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;;;
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(define %derivation-cache
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;; Package to derivation-path mapping.
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(make-weak-key-hash-table 100))
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(define (cache package system thunk)
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"Memoize the return values of THUNK as the derivation of PACKAGE on
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SYSTEM."
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(let ((vals (call-with-values thunk list)))
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;; Use `hashq-set!' instead of `hash-set!' because `hash' returns the
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;; same value for all structs (as of Guile 2.0.6), and because pointer
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;; equality is sufficient in practice.
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(hashq-set! %derivation-cache package `((,system ,@vals)))
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(apply values vals)))
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(define-syntax-rule (cached package system body ...)
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"Memoize the result of BODY for the arguments PACKAGE and SYSTEM.
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Return the cached result when available."
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(let ((thunk (lambda () body ...)))
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(match (hashq-ref %derivation-cache package)
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((alist (... ...))
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(match (assoc-ref alist system)
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((vals (... ...))
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(apply values vals))
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(#f
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(cache package system thunk))))
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(#f
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(cache package system thunk)))))
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(define* (package-derivation store package
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#:optional (system (%current-system)))
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"Return the derivation path and corresponding <derivation> object of
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PACKAGE for SYSTEM."
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(define (intern file)
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;; Add FILE to the store. Set the `recursive?' bit to #t, so that
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;; file permissions are preserved.
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(add-to-store store (basename file) #t "sha256" file))
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(define expand-input
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;; Expand the given input tuple such that it contains only
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;; references to derivation paths or store paths.
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(match-lambda
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(((? string? name) (? package? package))
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(list name (package-derivation store package system)))
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(((? string? name) (? package? package)
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(? string? sub-drv))
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(list name (package-derivation store package system)
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sub-drv))
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(((? string? name)
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(and (? string?) (? derivation-path?) drv))
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(list name drv))
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(((? string? name)
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(and (? string?) (? file-exists? file)))
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;; Add FILE to the store. When FILE is in the sub-directory of a
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;; store path, it needs to be added anyway, so it can be used as a
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;; source.
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(list name (intern file)))
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(((? string? name) (? origin? source))
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(list name (package-source-derivation store source system)))
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(x
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(raise (condition (&package-input-error
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(package package)
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(input x)))))))
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;; Compute the derivation and cache the result. Caching is important
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;; because some derivations, such as the implicit inputs of the GNU build
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;; system, will be queried many, many times in a row.
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(cached package system
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;; Bind %CURRENT-SYSTEM so that thunked field values can refer
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;; to it.
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(parameterize ((%current-system system))
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(match package
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(($ <package> name version source (= build-system-builder builder)
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args inputs propagated-inputs native-inputs self-native-input?
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outputs)
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;; TODO: For `search-paths', add a builder prologue that calls
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;; `set-path-environment-variable'.
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(let ((inputs (map expand-input
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(package-transitive-inputs package))))
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(apply builder
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store (package-full-name package)
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(and source
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(package-source-derivation store source system))
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inputs
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#:outputs outputs #:system system
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(args))))))))
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(define* (package-cross-derivation store package)
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;; TODO
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#f)
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(define* (package-output store package output
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#:optional (system (%current-system)))
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"Return the output path of PACKAGE's OUTPUT for SYSTEM---where OUTPUT is the
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symbolic output name, such as \"out\". Note that this procedure calls
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`package-derivation', which is costly."
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(let-values (((_ drv)
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(package-derivation store package system)))
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(derivation-output-path
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(assoc-ref (derivation-outputs drv) output))))
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