461 lines
18 KiB
Scheme
461 lines
18 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
|
||
;;; Copyright © 2010, 2011, 2012, 2013, 2014, 2015 Ludovic Courtès <ludo@gnu.org>
|
||
;;;
|
||
;;; This file is part of GNU Guix.
|
||
;;;
|
||
;;; GNU Guix is free software; you can redistribute it and/or modify it
|
||
;;; under the terms of the GNU General Public License as published by
|
||
;;; the Free Software Foundation; either version 3 of the License, or (at
|
||
;;; your option) any later version.
|
||
;;;
|
||
;;; GNU Guix is distributed in the hope that it will be useful, but
|
||
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
;;; GNU General Public License for more details.
|
||
;;;
|
||
;;; You should have received a copy of the GNU General Public License
|
||
;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
|
||
|
||
(define-module (guix import snix)
|
||
#:use-module (sxml ssax)
|
||
#:use-module (ice-9 popen)
|
||
#:use-module (ice-9 match)
|
||
#:use-module (ice-9 rdelim)
|
||
#:use-module (ice-9 format)
|
||
#:use-module (ice-9 regex)
|
||
#:use-module (ice-9 vlist)
|
||
#:use-module (srfi srfi-1)
|
||
#:use-module (srfi srfi-9)
|
||
#:use-module (srfi srfi-11)
|
||
#:use-module (srfi srfi-26)
|
||
#:use-module (srfi srfi-37)
|
||
#:use-module (system foreign)
|
||
#:use-module (rnrs bytevectors)
|
||
#:use-module (guix utils)
|
||
#:use-module (guix import utils)
|
||
#:use-module (guix base32)
|
||
#:use-module (guix config)
|
||
#:use-module (guix gnu-maintenance)
|
||
#:export (open-nixpkgs
|
||
xml->snix
|
||
nixpkgs->guix-package))
|
||
|
||
;;; Commentary:
|
||
;;;
|
||
;;; Converting Nix code to s-expressions, and then to Guix `package'
|
||
;;; declarations, using the XML output of `nix-instantiate'.
|
||
;;;
|
||
;;; Code:
|
||
|
||
|
||
;;;
|
||
;;; SNix.
|
||
;;;
|
||
|
||
;; Nix object types visible in the XML output of `nix-instantiate' and
|
||
;; mapping to S-expressions (we map to sexps, not records, so that we
|
||
;; can do pattern matching):
|
||
;;
|
||
;; at (at varpat attrspat)
|
||
;; attr (attribute loc name value)
|
||
;; attrs (attribute-set attributes)
|
||
;; attrspat (attribute-set-pattern patterns)
|
||
;; bool #f|#t
|
||
;; derivation (derivation drv-path out-path attributes)
|
||
;; ellipsis '...
|
||
;; expr (snix loc body ...)
|
||
;; function (function loc at|attrspat|varpat)
|
||
;; int int
|
||
;; list list
|
||
;; null 'null
|
||
;; path string
|
||
;; string string
|
||
;; unevaluated 'unevaluated
|
||
;; varpat (varpat name)
|
||
;;
|
||
;; Initially ATTRIBUTES in `derivation' and `attribute-set' was a promise;
|
||
;; however, handling `repeated' nodes makes it impossible to do anything
|
||
;; lazily because the whole SXML tree has to be traversed to maintain the
|
||
;; list of known derivations.
|
||
|
||
(define (xml-element->snix elem attributes body derivations)
|
||
"Return an SNix element corresponding to XML element ELEM."
|
||
|
||
(define (loc)
|
||
(location (assq-ref attributes 'path)
|
||
(assq-ref attributes 'line)
|
||
(assq-ref attributes 'column)))
|
||
|
||
(case elem
|
||
((at)
|
||
(values `(at ,(car body) ,(cadr body)) derivations))
|
||
((attr)
|
||
(let ((name (assq-ref attributes 'name)))
|
||
(cond ((null? body)
|
||
(values `(attribute-pattern ,name) derivations))
|
||
((and (pair? body) (null? (cdr body)))
|
||
(values `(attribute ,(loc) ,name ,(car body))
|
||
derivations))
|
||
(else
|
||
(error "invalid attribute body" name (loc) body)))))
|
||
((attrs)
|
||
(values `(attribute-set ,(reverse body)) derivations))
|
||
((attrspat)
|
||
(values `(attribute-set-pattern ,body) derivations))
|
||
((bool)
|
||
(values (string-ci=? "true" (assq-ref attributes 'value))
|
||
derivations))
|
||
((derivation)
|
||
(let ((drv-path (assq-ref attributes 'drvPath))
|
||
(out-path (assq-ref attributes 'outPath)))
|
||
(if (equal? body '(repeated))
|
||
(let ((body (vhash-assoc drv-path derivations)))
|
||
(if (pair? body)
|
||
(values `(derivation ,drv-path ,out-path ,(cdr body))
|
||
derivations)
|
||
|
||
;; DRV-PATH hasn't been encountered yet but may be later
|
||
;; (see <http://article.gmane.org/gmane.linux.distributions.nixos/5946>.)
|
||
;; Return an `unresolved' node.
|
||
(values `(unresolved
|
||
,(lambda (derivations)
|
||
(let ((body (vhash-assoc drv-path derivations)))
|
||
(if (pair? body)
|
||
`(derivation ,drv-path ,out-path
|
||
,(cdr body))
|
||
(error "no previous occurrence of derivation"
|
||
drv-path)))))
|
||
derivations)))
|
||
(values `(derivation ,drv-path ,out-path ,body)
|
||
(vhash-cons drv-path body derivations)))))
|
||
((ellipsis)
|
||
(values '... derivations))
|
||
((expr)
|
||
(values `(snix ,(loc) ,@body) derivations))
|
||
((function)
|
||
(values `(function ,(loc) ,body) derivations))
|
||
((int)
|
||
(values (string->number (assq-ref attributes 'value))
|
||
derivations))
|
||
((list)
|
||
(values body derivations))
|
||
((null)
|
||
(values 'null derivations))
|
||
((path)
|
||
(values (assq-ref attributes 'value) derivations))
|
||
((repeated)
|
||
(values 'repeated derivations))
|
||
((string)
|
||
(values (assq-ref attributes 'value) derivations))
|
||
((unevaluated)
|
||
(values 'unevaluated derivations))
|
||
((varpat)
|
||
(values `(varpat ,(assq-ref attributes 'name)) derivations))
|
||
(else (error "unhandled Nix XML element" elem))))
|
||
|
||
(define (resolve snix derivations)
|
||
"Return a new SNix tree where `unresolved' nodes from SNIX have been
|
||
replaced by the result of their application to DERIVATIONS, a vhash."
|
||
(let loop ((node snix)
|
||
(seen vlist-null))
|
||
(if (vhash-assq node seen)
|
||
(values node seen)
|
||
(match node
|
||
(('unresolved proc)
|
||
(let ((n (proc derivations)))
|
||
(values n seen)))
|
||
((tag body ...)
|
||
(let ((body+seen (fold (lambda (n body+seen)
|
||
(call-with-values
|
||
(lambda ()
|
||
(loop n (cdr body+seen)))
|
||
(lambda (n* seen)
|
||
(cons (cons n* (car body+seen))
|
||
(vhash-consq n #t seen)))))
|
||
(cons '() (vhash-consq node #t seen))
|
||
body)))
|
||
(values (cons tag (reverse (car body+seen)))
|
||
(vhash-consq node #t (cdr body+seen)))))
|
||
(anything
|
||
(values anything seen))))))
|
||
|
||
(define xml->snix
|
||
(let ((parse
|
||
(ssax:make-parser NEW-LEVEL-SEED
|
||
(lambda (elem-gi attributes namespaces expected-content
|
||
seed)
|
||
(cons '() (cdr seed)))
|
||
|
||
FINISH-ELEMENT
|
||
(lambda (elem-gi attributes namespaces parent-seed
|
||
seed)
|
||
(let ((snix (car seed))
|
||
(derivations (cdr seed)))
|
||
(let-values (((snix derivations)
|
||
(xml-element->snix elem-gi
|
||
attributes
|
||
snix
|
||
derivations)))
|
||
(cons (cons snix (car parent-seed))
|
||
derivations))))
|
||
|
||
CHAR-DATA-HANDLER
|
||
(lambda (string1 string2 seed)
|
||
;; Discard inter-node strings, which are blanks.
|
||
seed))))
|
||
(lambda (port)
|
||
"Return the SNix represention of TREE, an SXML tree as returned by
|
||
parsing the XML output of `nix-instantiate' on Nixpkgs."
|
||
(match (parse port (cons '() vlist-null))
|
||
(((snix) . derivations)
|
||
(resolve snix derivations))))))
|
||
|
||
(define (attribute-value attribute)
|
||
"Return the value of ATTRIBUTE."
|
||
(match attribute
|
||
(('attribute _ _ value) value)))
|
||
|
||
(define (derivation-source derivation)
|
||
"Return the \"src\" attribute of DERIVATION or #f if not found."
|
||
(match derivation
|
||
(('derivation _ _ (attributes ...))
|
||
(find-attribute-by-name "src" attributes))))
|
||
|
||
(define (derivation-output-path derivation)
|
||
"Return the output path of DERIVATION."
|
||
(match derivation
|
||
(('derivation _ out-path _)
|
||
out-path)
|
||
(_ #f)))
|
||
|
||
(define (source-output-path src)
|
||
"Return the output path of SRC, the \"src\" attribute of a derivation."
|
||
(derivation-output-path (attribute-value src)))
|
||
|
||
(define (source-urls src)
|
||
"Return the URLs of SRC, the \"src\" attribute of a derivation."
|
||
(match src
|
||
(('attribute _ _ ('derivation _ _ (attributes ...)))
|
||
(match (find-attribute-by-name "urls" attributes)
|
||
(('attribute _ _ value)
|
||
value)))
|
||
(_ #f)))
|
||
|
||
(define (source-sha256 src)
|
||
"Return the sha256 of SRC, the \"src\" attribute of a derivation, as a
|
||
bytevector."
|
||
(match src
|
||
(('attribute _ _ ('derivation _ _ (attributes ...)))
|
||
(match (find-attribute-by-name "outputHash" attributes)
|
||
(('attribute _ _ value)
|
||
(match value
|
||
((= string-length 52)
|
||
(nix-base32-string->bytevector value))
|
||
((= string-length 64)
|
||
(base16-string->bytevector value))
|
||
(_
|
||
(error "unsupported hash format" value))))))
|
||
(_ #f)))
|
||
|
||
(define (derivation-source-output-path derivation)
|
||
"Return the output path of the \"src\" attribute of DERIVATION or #f
|
||
if DERIVATION lacks an \"src\" attribute."
|
||
(and=> (derivation-source derivation) source-output-path))
|
||
|
||
(define* (open-nixpkgs nixpkgs #:optional attribute)
|
||
"Return an input pipe to the XML representation of Nixpkgs. When
|
||
ATTRIBUTE is true, only that attribute is considered."
|
||
(with-fluids ((%default-port-encoding "UTF-8"))
|
||
(let ((cross-system (format #f "{
|
||
config = \"i686-guix-linux-gnu\";
|
||
libc = \"glibc\";
|
||
arch = \"guix\";
|
||
withTLS = true;
|
||
float = \"hard\";
|
||
openssl.system = \"linux-generic32\";
|
||
platform = (import ~a/pkgs/top-level/platforms.nix).sheevaplug;
|
||
}" nixpkgs)))
|
||
(apply open-pipe* OPEN_READ
|
||
%nix-instantiate "--strict" "--eval-only" "--xml"
|
||
|
||
;; Pass a dummy `crossSystem' argument so that `buildInputs' and
|
||
;; `nativeBuildInputs' are not coalesced.
|
||
;; XXX: This is hacky and has other problems.
|
||
;"--arg" "crossSystem" cross-system
|
||
|
||
`(,@(if attribute
|
||
`("-A" ,attribute)
|
||
'())
|
||
,nixpkgs)))))
|
||
|
||
(define (pipe-failed? pipe)
|
||
"Close pipe and return its status if it failed."
|
||
(let ((status (close-pipe pipe)))
|
||
(if (or (status:term-sig status)
|
||
(not (= (status:exit-val status) 0)))
|
||
status
|
||
#f)))
|
||
|
||
(define (find-attribute-by-name name attributes)
|
||
"Return attribute NAME in ATTRIBUTES, an attribute set or list of SNix
|
||
attributes, or #f if NAME cannot be found."
|
||
(find (lambda (a)
|
||
(match a
|
||
(('attribute _ (? (cut string=? <> name)) _)
|
||
a)
|
||
(_ #f)))
|
||
(match attributes
|
||
(('attribute-set (attributes ...))
|
||
attributes)
|
||
(_
|
||
attributes))))
|
||
|
||
(define (license-variable license)
|
||
"Return the name of the (guix licenses) variable for LICENSE."
|
||
(match license
|
||
("GPLv2+" 'gpl2+)
|
||
("GPLv3+" 'gpl3+)
|
||
("LGPLv2+" 'lgpl2.1+)
|
||
("LGPLv2.1+" 'lgpl2.1+)
|
||
("LGPLv3+" 'lgpl3+)
|
||
(('attribute-set _ ...)
|
||
;; At some point in 2013, Nixpkgs switched to attribute sets to represent
|
||
;; licenses. These are listed in lib/licenses.nix.
|
||
(match (and=> (find-attribute-by-name "shortName" license)
|
||
attribute-value)
|
||
("agpl3Plus" 'agpl3+)
|
||
("gpl2Plus" 'gpl2+)
|
||
("gpl3Plus" 'gpl3+)
|
||
("lgpl2Plus" 'lgpl2.0+)
|
||
("lgpl21Plus" 'lgpl2.1+)
|
||
("lgpl3Plus" 'lgpl3+)
|
||
((? string? x) x)
|
||
(_ license)))
|
||
(_ license)))
|
||
|
||
(define (package-source-output-path package)
|
||
"Return the output path of the \"src\" derivation of PACKAGE."
|
||
(derivation-source-output-path (attribute-value package)))
|
||
|
||
|
||
;;;
|
||
;;; Conversion of "Nix expressions" to "Guix expressions".
|
||
;;;
|
||
|
||
(define (snix-derivation->guix-package derivation)
|
||
"Return the `package' s-expression corresponding to SNix DERIVATION, a
|
||
Nixpkgs `stdenv.mkDerivation'-style derivation, and the original source
|
||
location of DERIVATION."
|
||
(match derivation
|
||
(('derivation _ _ (attributes ...))
|
||
(let*-values (((full-name loc)
|
||
(match (find-attribute-by-name "name" attributes)
|
||
(('attribute loc _ value)
|
||
(values value loc))
|
||
(_
|
||
(values #f #f))))
|
||
((name version)
|
||
(package-name->name+version full-name)))
|
||
(define (convert-inputs type)
|
||
;; Convert the derivation's input from a list of SNix derivations to
|
||
;; a list of name/variable pairs.
|
||
(match (and=> (find-attribute-by-name type attributes)
|
||
attribute-value)
|
||
(#f
|
||
'())
|
||
((inputs ...)
|
||
;; Inputs can be either derivations or the null value.
|
||
(filter-map (match-lambda
|
||
(('derivation _ _ (attributes ...))
|
||
(let* ((full-name
|
||
(attribute-value
|
||
(find-attribute-by-name "name" attributes)))
|
||
(name (package-name->name+version full-name)))
|
||
(list name
|
||
(list 'unquote (string->symbol name)))))
|
||
('null #f))
|
||
inputs))))
|
||
|
||
(define (maybe-inputs guix-name inputs)
|
||
(match inputs
|
||
(()
|
||
'())
|
||
((inputs ...)
|
||
(list (list guix-name
|
||
(list 'quasiquote inputs))))))
|
||
|
||
(define (pretty-uri uri version)
|
||
(if version
|
||
(match (factorize-uri uri version)
|
||
((items ...)
|
||
`(string-append ,@items))
|
||
(x x))
|
||
uri))
|
||
|
||
(let* ((source (find-attribute-by-name "src" attributes))
|
||
(urls (source-urls source))
|
||
(sha256 (source-sha256 source))
|
||
(meta (and=> (find-attribute-by-name "meta" attributes)
|
||
attribute-value)))
|
||
(values
|
||
`(package
|
||
(name ,name)
|
||
(version ,version)
|
||
(source (origin
|
||
(method url-fetch)
|
||
(uri ,(pretty-uri (car urls) version))
|
||
(sha256
|
||
(base32
|
||
,(bytevector->nix-base32-string sha256)))))
|
||
(build-system gnu-build-system)
|
||
|
||
;; When doing a native Nixpkgs build, `buildInputs' is empty and
|
||
;; everything is in `nativeBuildInputs'. So we can't distinguish
|
||
;; between both, here.
|
||
;;
|
||
;; Note that `nativeBuildInputs' was renamed from
|
||
;; `buildNativeInputs' in Nixpkgs sometime around March 2013.
|
||
,@(maybe-inputs 'inputs
|
||
(convert-inputs "nativeBuildInputs"))
|
||
,@(maybe-inputs 'propagated-inputs
|
||
(convert-inputs "propagatedNativeBuildInputs"))
|
||
|
||
(home-page ,(and=> (find-attribute-by-name "homepage" meta)
|
||
attribute-value))
|
||
(synopsis
|
||
;; For GNU packages, prefer the official synopsis.
|
||
,(or (false-if-exception
|
||
(and=> (find (lambda (gnu-package)
|
||
(equal? (gnu-package-name gnu-package)
|
||
name))
|
||
(official-gnu-packages))
|
||
gnu-package-doc-summary))
|
||
(and=> (find-attribute-by-name "description" meta)
|
||
attribute-value)))
|
||
(description
|
||
;; Likewise, prefer the official description of GNU packages.
|
||
,(or (false-if-exception
|
||
(and=> (find (lambda (gnu-package)
|
||
(equal? (gnu-package-name gnu-package)
|
||
name))
|
||
(official-gnu-packages))
|
||
gnu-package-doc-description))
|
||
(and=> (find-attribute-by-name "longDescription" meta)
|
||
attribute-value)))
|
||
(license ,(and=> (find-attribute-by-name "license" meta)
|
||
(compose license-variable attribute-value))))
|
||
loc))))))
|
||
|
||
(define (nixpkgs->guix-package nixpkgs attribute)
|
||
"Evaluate ATTRIBUTE in NIXPKGS, the file name of a Nixpkgs checkout,
|
||
and return the `package' s-expression corresponding to that package."
|
||
(let ((port (open-nixpkgs nixpkgs attribute)))
|
||
(match (xml->snix port)
|
||
(('snix loc (and drv ('derivation _ ...)))
|
||
(and (not (pipe-failed? port))
|
||
(snix-derivation->guix-package drv)))
|
||
(_
|
||
(not (pipe-failed? port))))))
|
||
|
||
;;; snix.scm ends here
|