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Augment `build-expression->derivation' with #:modules; add `http-fetch'. 

* guix/derivations.scm (imported-modules): New procedure.
  (build-expression->derivation): New keyword argument `modules'.
  Use `imported-modules' when MODULES is non-empty, and pass it with
  `-L' to GUILE.

* guix/build/http.scm, guix/http.scm, tests/builders.scm: New files.
This commit is contained in:
Ludovic Courtès 2012-06-12 00:18:14 +02:00
parent 99634e3ff4
commit 3eb982377e
4 changed files with 168 additions and 4 deletions
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42
guix/build/http.scm Normal file
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@ -0,0 +1,42 @@
;;; 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 build http)
#:use-module (web client)
#:use-module (web uri)
#:use-module (rnrs io ports)
#:use-module (srfi srfi-11)
#:export (http-fetch))
;;; Commentary:
;;;
;;; Fetch data such as tarballs over HTTP (builder-side code).
;;;
;;; Code:
(define (http-fetch url file)
"Fetch data from URL and write it to FILE. Return FILE on success."
;; FIXME: Use a variant of `http-get' that returns a port instead of
;; loading everything in memory.
(let-values (((resp bv)
(http-get (string->uri url) #:decode-body? #f)))
(call-with-output-file file
(lambda (p)
(put-bytevector p bv))))
file)

35
guix/derivations.scm
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@ -418,9 +418,27 @@ system, imported, and appears under FINAL-PATH in the resulting store path."
(build-expression->derivation store name (%current-system)
builder files)))
(define* (imported-modules store modules
#:key (name "module-import")
(system (%current-system)))
"Return a derivation that contains the source files of MODULES, a list of
module names such as `(ice-9 q)'. All of MODULES must be in the current
search path."
;; TODO: Determine the closure of MODULES, build the `.go' files,
;; canonicalize the source files through read/write, etc.
(let ((files (map (lambda (m)
(let ((f (string-append
(string-join (map symbol->string m) "/")
".scm")))
(cons f (search-path %load-path f))))
modules)))
(imported-files store files #:name name #:system system)))
(define* (build-expression->derivation store name system exp inputs
#:key (outputs '("out"))
hash hash-algo)
hash hash-algo
(modules '()))
"Return a derivation that executes Scheme expression EXP as a builder for
derivation NAME. INPUTS must be a list of string/derivation-path pairs. EXP
is evaluated in an environment where %OUTPUT is bound to the main output
@ -449,10 +467,19 @@ INPUTS."
(string-append name "-guile-builder")
(string-append (object->string prologue)
(object->string exp))
(map cdr inputs))))
(derivation store name system guile `("--no-auto-compile" ,builder)
(map cdr inputs)))
(mod-drv (if (null? modules)
#f
(imported-modules store modules)))
(mod-dir (and mod-drv
(derivation-path->output-path mod-drv))))
(derivation store name system guile
`("--no-auto-compile"
,@(if mod-dir `("-L" ,mod-dir) '())
,builder)
'(("HOME" . "/homeless"))
`((,(%guile-for-build))
(,builder))
(,builder)
,@(if mod-drv `((,mod-drv)) '()))
#:hash hash #:hash-algo hash-algo
#:outputs outputs)))

45
guix/http.scm Normal file
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@ -0,0 +1,45 @@
;;; 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 http)
#:use-module (guix derivations)
#:use-module (guix utils)
#:export (http-fetch))
;;; Commentary:
;;;
;;; Produce fixed-output derivations with data fetched over HTTP.
;;;
;;; Code:
(define* (http-fetch store url hash-algo hash
#:key name (system (%current-system)))
"Return the path of a fixed-output derivation in STORE that fetches URL,
which is expected to have hash HASH of type HASH-ALGO (a symbol). By
default, the file name is the base name of URL; optionally, NAME can specify
a different file name."
(define builder
`(begin
(use-modules (guix build http))
(http-fetch ,url %output)))
(build-expression->derivation store (or name (basename url)) system
builder '()
#:hash-algo hash-algo
#:hash hash
#:modules '((guix build http))))

50
tests/builders.scm Normal file
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@ -0,0 +1,50 @@
;;; 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 (test-builders)
#:use-module (guix http)
#:use-module (guix store)
#:use-module (guix utils)
#:use-module (guix derivations)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-64))
;; Test the higher-level builders.
(define %store
(false-if-exception (open-connection)))
(test-begin "builders")
(test-assert "http-fetch"
(let* ((url "http://ftp.gnu.org/gnu/hello/hello-2.8.tar.gz")
(hash (nix-base32-string->bytevector
"0wqd8sjmxfskrflaxywc7gqw7sfawrfvdxd9skxawzfgyy0pzdz6"))
(drv-path (http-fetch %store url 'sha256 hash)))
(and (build-derivations %store (list drv-path))
(file-exists? (derivation-path->output-path drv-path)))))
(test-end "builders")
(exit (= (test-runner-fail-count (test-runner-current)) 0))
;;; Local Variables:
;;; eval: (put 'test-assert 'scheme-indent-function 1)
;;; End: