From f63c79bf7674df012517f8e9148f94c611e35f32 Mon Sep 17 00:00:00 2001 From: Hartmut Goebel Date: Sun, 21 Jun 2020 22:25:30 +0200 Subject: [PATCH] Add (guix extracting-download). * guix/extracting-download.scm: New file * Makefile.am (MODULES): Add it. --- Makefile.am | 1 + guix/extracting-download.scm | 179 +++++++++++++++++++++++++++++++++++ 2 files changed, 180 insertions(+) create mode 100644 guix/extracting-download.scm diff --git a/Makefile.am b/Makefile.am index b66789fa0b..f2b6c8e8da 100644 --- a/Makefile.am +++ b/Makefile.am @@ -96,6 +96,7 @@ MODULES = \ guix/discovery.scm \ guix/android-repo-download.scm \ guix/bzr-download.scm \ + guix/extracting-download.scm \ guix/git-download.scm \ guix/hg-download.scm \ guix/swh.scm \ diff --git a/guix/extracting-download.scm b/guix/extracting-download.scm new file mode 100644 index 0000000000..4b7dcc7e83 --- /dev/null +++ b/guix/extracting-download.scm @@ -0,0 +1,179 @@ +;;; GNU Guix --- Functional package management for GNU +;;; Copyright © 2014, 2015, 2016, 2017, 2018, 2019 Ludovic Courtès +;;; Copyright © 2017 Mathieu Lirzin +;;; Copyright © 2017 Christopher Baines +;;; Copyright © 2020 Jakub Kądziołka +;;; Copyright © 2020 Hartmut Goebel +;;; +;;; 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 . + +(define-module (guix extracting-download) + #:use-module (ice-9 match) + #:use-module (ice-9 popen) + #:use-module ((guix build download) #:prefix build:) + #:use-module ((guix build utils) #:hide (delete)) + #:use-module (guix gexp) + #:use-module (guix modules) + #:use-module (guix monads) + #:use-module (guix packages) ;; for %current-system + #:use-module (guix store) + #:use-module (guix utils) + #:use-module (srfi srfi-26) + #:export (http-fetch/extract + download-to-store/extract)) + +;;; +;;; Produce fixed-output derivations with data extracted from n archive +;;; fetched over HTTP or FTP. +;;; +;;; This is meant to be used for package repositories where the actual source +;;; archive is packed into another archive, eventually carrying meta-data. +;;; Using this derivation saves both storing the outer archive and extracting +;;; the actual one at build time. The hash is calculated on the actual +;;; archive to ease validating the stored file. +;;; + +(define* (http-fetch/extract url filename-to-extract hash-algo hash + #:optional name + #:key (system (%current-system)) (guile (default-guile))) + "Return a fixed-output derivation that fetches an archive at URL, and +extracts FILE_TO_EXTRACT from the archive. The FILE_TO_EXTRACT 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 file-name + (match url + ((head _ ...) + (basename head)) + (_ + (basename url)))) + + (define guile-zlib + (module-ref (resolve-interface '(gnu packages guile)) 'guile-zlib)) + + (define guile-json + (module-ref (resolve-interface '(gnu packages guile)) 'guile-json-4)) + + (define gnutls + (module-ref (resolve-interface '(gnu packages tls)) 'gnutls)) + + (define inputs + `(("tar" ,(module-ref (resolve-interface '(gnu packages base)) + 'tar)))) + + (define config.scm + (scheme-file "config.scm" + #~(begin + (define-module (guix config) + #:export (%system)) + + (define %system + #$(%current-system))))) + + (define modules + (cons `((guix config) => ,config.scm) + (delete '(guix config) + (source-module-closure '((guix build download) + (guix build utils) + (guix utils) + (web uri)))))) + + (define build + (with-imported-modules modules + (with-extensions (list guile-json gnutls ;for (guix swh) + guile-zlib) + #~(begin + (use-modules (guix build download) + (guix build utils) + (guix utils) + (web uri) + (ice-9 match) + (ice-9 popen)) + ;; The code below expects tar to be in $PATH. + (set-path-environment-variable "PATH" '("bin") + (match '#+inputs + (((names dirs outputs ...) ...) + dirs))) + + (setvbuf (current-output-port) 'line) + (setvbuf (current-error-port) 'line) + + (call-with-temporary-directory + (lambda (directory) + ;; TODO: Support different archive types, based on content-type + ;; or archive name extention. + (let* ((file-to-extract (getenv "extract filename")) + (port (http-fetch (string->uri (getenv "download url")) + #:verify-certificate? #f)) + (tar (open-pipe* OPEN_WRITE "tar" "-C" directory + "-xf" "-" file-to-extract))) + (dump-port port tar) + (close-port port) + (let ((status (close-pipe tar))) + (unless (zero? status) + (error "tar extraction failure" status))) + (copy-file (string-append directory "/" + (getenv "extract filename")) + #$output)))))))) + + (mlet %store-monad ((guile (package->derivation guile system))) + (gexp->derivation (or name file-name) build + + ;; Use environment variables and a fixed script name so + ;; there's only one script in store for all the + ;; downloads. + #:script-name "extract-download" + #:env-vars + `(("download url" . ,url) + ("extract filename" . ,filename-to-extract)) + #:leaked-env-vars '("http_proxy" "https_proxy" + "LC_ALL" "LC_MESSAGES" "LANG" + "COLUMNS") + #:system system + #:local-build? #t ; don't offload download + #:hash-algo hash-algo + #:hash hash + #:guile-for-build guile))) + + +(define* (download-to-store/extract store url filename-to-extract + #:optional (name (basename url)) + #:key (log (current-error-port)) + (verify-certificate? #t)) + "Download an archive from URL, and extracts FILE_TO_EXTRACT from the archive +to STORE, either under NAME or URL's basename if omitted. Write progress +reports to LOG. VERIFY-CERTIFICATE? determines whether or not to validate +HTTPS server certificates." + (call-with-temporary-output-file + (lambda (temp port) + (let ((result + (parameterize ((current-output-port log)) + (build:url-fetch url temp + ;;#:mirrors %mirrors + #:verify-certificate? + verify-certificate?)))) + (close port) + (and result + (call-with-temporary-output-file + (lambda (contents port) + (let ((tar (open-pipe* OPEN_READ + "tar" ;"--auto-compress" + "-xf" temp "--to-stdout" filename-to-extract))) + (dump-port tar port) + (close-port port) + (let ((status (close-pipe tar))) + (unless (zero? status) + (error "tar extraction failure" status))) + (add-to-store store name #f "sha256" contents)))))))))