--- /dev/null
+;;; 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 download)
+ #:use-module (web uri)
+ #:use-module (web client)
+ #:use-module (web response)
+ #:use-module (guix ftp-client)
+ #:use-module (guix build utils)
+ #:use-module (rnrs io ports)
+ #:use-module (srfi srfi-11)
+ #:use-module (ice-9 match)
+ #:export (url-fetch))
+
+;;; Commentary:
+;;;
+;;; Fetch data such as tarballs over HTTP or FTP (builder-side code).
+;;;
+;;; Code:
+
+(define (ftp-fetch uri file)
+ "Fetch data from URI and write it to FILE. Return FILE on success."
+ (let* ((conn (ftp-open (uri-host uri)))
+ (in (ftp-retr conn (basename (uri-path uri))
+ (dirname (uri-path uri)))))
+ (call-with-output-file file
+ (lambda (out)
+ ;; TODO: Show a progress bar.
+ (dump-port in out)))
+
+ (ftp-close conn))
+ file)
+
+(define (open-connection-for-uri uri)
+ "Return an open input/output port for a connection to URI.
+
+This is the same as Guile's `open-socket-for-uri', except that we always
+use a numeric port argument, to avoid the need to go through libc's NSS,
+which is not available during bootstrap."
+ (define addresses
+ (let ((port (or (uri-port uri)
+ (case (uri-scheme uri)
+ ((http) 80) ; /etc/services, not for me!
+ (else
+ (error "unsupported URI scheme" uri))))))
+ (getaddrinfo (uri-host uri)
+ (number->string port)
+ AI_NUMERICSERV)))
+
+ (let loop ((addresses addresses))
+ (let* ((ai (car addresses))
+ (s (with-fluids ((%default-port-encoding #f))
+ (socket (addrinfo:fam ai) (addrinfo:socktype ai)
+ (addrinfo:protocol ai)))))
+ (catch 'system-error
+ (lambda ()
+ (connect s (addrinfo:addr ai))
+
+ ;; Buffer input and output on this port.
+ (setvbuf s _IOFBF)
+ ;; Enlarge the receive buffer.
+ (setsockopt s SOL_SOCKET SO_RCVBUF (* 12 1024))
+ s)
+ (lambda args
+ ;; Connection failed, so try one of the other addresses.
+ (close s)
+ (if (null? addresses)
+ (apply throw args)
+ (loop (cdr addresses))))))))
+
+;; XXX: This is an awful hack to make sure the (set-port-encoding! p
+;; "ISO-8859-1") call in `read-response' passes, even during bootstrap
+;; where iconv is not available.
+(module-define! (resolve-module '(web response))
+ 'set-port-encoding!
+ (lambda (p e) #f))
+
+(define (http-fetch uri file)
+ "Fetch data from URI 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 (((connection)
+ (open-connection-for-uri uri))
+ ((resp bv)
+ (http-get uri #:port connection #:decode-body? #f))
+ ((code)
+ (response-code resp)))
+ (if (= 200 code)
+ (begin
+ (call-with-output-file file
+ (lambda (p)
+ (put-bytevector p bv)))
+ file)
+ (error "download failed" (uri->string uri)
+ code (response-reason-phrase resp)))))
+
+\f
+(define-syntax-rule (false-if-exception* body ...)
+ "Like `false-if-exception', but print the exception on the error port."
+ (catch #t
+ (lambda ()
+ body ...)
+ (lambda (key . args)
+ #f)
+ (lambda (key . args)
+ (print-exception (current-error-port) #f key args))))
+
+(define (url-fetch url file)
+ "Fetch FILE from URL; URL may be either a single string, or a list of
+string denoting alternate URLs for FILE. Return #f on failure, and FILE
+on success."
+ (define uri
+ (match url
+ ((_ ...) (map string->uri url))
+ (_ (list (string->uri url)))))
+
+ (define (fetch uri file)
+ (format #t "starting download of `~a' from `~a'...~%"
+ file (uri->string uri))
+ (case (uri-scheme uri)
+ ((http) (false-if-exception* (http-fetch uri file)))
+ ((ftp) (false-if-exception* (ftp-fetch uri file)))
+ (else
+ (format #t "skipping URI with unsupported scheme: ~s~%"
+ uri)
+ #f)))
+
+ (setvbuf (current-output-port) _IOLBF)
+ (setvbuf (current-error-port) _IOLBF)
+
+ (let try ((uri uri))
+ (match uri
+ ((uri tail ...)
+ (or (fetch uri file)
+ (try tail)))
+ (()
+ (format (current-error-port) "failed to download ~s from ~s~%"
+ file url)
+ #f))))
+
+;;; download.scm ends here
--- /dev/null
+;;; 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 download)
+ #:use-module (ice-9 match)
+ #:use-module (guix derivations)
+ #:use-module (guix packages)
+ #:use-module ((guix store) #:select (derivation-path?))
+ #:use-module (guix utils)
+ #:export (url-fetch))
+
+;;; Commentary:
+;;;
+;;; Produce fixed-output derivations with data fetched over HTTP or FTP.
+;;;
+;;; Code:
+
+(define* (url-fetch store url hash-algo hash
+ #:optional name
+ #:key (system (%current-system)) guile)
+ "Return the path of a fixed-output derivation in STORE that fetches
+URL (a string, or a list of strings denoting alternate URLs), 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 download))
+ (url-fetch ',url %output)))
+
+ (define guile-for-build
+ (match guile
+ ((? package?)
+ (package-derivation store guile system))
+ ((and (? string?) (? derivation-path?))
+ guile)
+ (#f ; the default
+ (let* ((distro (resolve-interface '(distro packages base)))
+ (guile (module-ref distro 'guile-final)))
+ (package-derivation store guile system)))))
+
+ (define file-name
+ (match url
+ ((head _ ...)
+ (basename head))
+ (_
+ (basename url))))
+
+ (build-expression->derivation store (or name file-name) system
+ builder '()
+ #:hash-algo hash-algo
+ #:hash hash
+ #:modules '((guix build download)
+ (guix build utils)
+ (guix ftp-client))
+ #:guile-for-build guile-for-build))
+
+;;; download.scm ends here
(define-module (test-builders)
#:use-module (guix http)
+ #:use-module (guix download)
#:use-module (guix build-system)
#:use-module (guix build-system gnu)
#:use-module (guix store)
(file-exists? out-path)
(valid-path? %store out-path))))
+(test-assert "url-fetch"
+ (let* ((url '("http://ftp.gnu.org/gnu/hello/hello-2.8.tar.gz"
+ "ftp://ftp.gnu.org/gnu/hello/hello-2.8.tar.gz"))
+ (hash (nix-base32-string->bytevector
+ "0wqd8sjmxfskrflaxywc7gqw7sfawrfvdxd9skxawzfgyy0pzdz6"))
+ (drv-path (url-fetch %store url 'sha256 hash))
+ (out-path (derivation-path->output-path drv-path)))
+ (and (build-derivations %store (list drv-path))
+ (file-exists? out-path)
+ (valid-path? %store out-path))))
+
(test-assert "gnu-build-system"
(and (build-system? gnu-build-system)
(eq? gnu-build (build-system-builder gnu-build-system))))
HCoop / jackhill / guix / guix.git / commitdiff