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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2015 David Thompson <davet@gnu.org>
;;; Copyright © 2015 Pjotr Prins <pjotr.public01@thebird.nl>
;;;
;;; 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 build ruby-build-system)
#:use-module ((guix build gnu-build-system) #:prefix gnu:)
#:use-module (guix build utils)
#:use-module (ice-9 match)
#:use-module (ice-9 popen)
#:use-module (ice-9 regex)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-26)
#:export (%standard-phases
ruby-build
gem-home))
;; Commentary:
;;
;; Builder-side code of the standard Ruby package build procedure.
;;
;; Code:
(define (first-matching-file pattern)
"Return the first file name that matches PATTERN in the current working
directory."
(match (find-files "." pattern)
((file-name . _) file-name)
(() (error "No files matching pattern: " pattern))))
(define gnu:unpack (assq-ref gnu:%standard-phases 'unpack))
(define (gem-archive? file-name)
(string-match "^.*\\.gem$" file-name))
(define* (unpack #:key source #:allow-other-keys)
"Unpack the gem SOURCE and enter the resulting directory."
(if (gem-archive? source)
(and (zero? (system* "gem" "unpack" source))
;; The unpacked gem directory is named the same as the archive,
;; sans the ".gem" extension. It is renamed to simply "gem" in an
;; effort to keep file names shorter to avoid UNIX-domain socket
;; file names and shebangs that exceed the system's fixed maximum
;; length when running test suites.
(let ((dir (match:substring (string-match "^(.*)\\.gem$"
(basename source))
1)))
(rename-file dir "gem")
(chdir "gem")
#t))
;; Use GNU unpack strategy for things that aren't gem archives.
(gnu:unpack #:source source)))
(define* (build #:key source #:allow-other-keys)
"Build a new gem using the gemspec from the SOURCE gem."
(define (first-gemspec)
(first-matching-file "\\.gemspec$"))
;; Remove the original gemspec, if present, and replace it with a new one.
;; This avoids issues with upstream gemspecs requiring tools such as git to
;; generate the files list.
(when (gem-archive? source)
(let ((gemspec (or (false-if-exception (first-gemspec))
;; Make new gemspec if one wasn't shipped.
".gemspec")))
(when (file-exists? gemspec) (delete-file gemspec))
;; Extract gemspec from source gem.
(let ((pipe (open-pipe* OPEN_READ "gem" "spec" "--ruby" source)))
(dynamic-wind
(const #t)
(lambda ()
(call-with-output-file gemspec
(lambda (out)
;; 'gem spec' writes to stdout, but 'gem build' only reads
;; gemspecs from a file, so we redirect the output to a file.
(while (not (eof-object? (peek-char pipe)))
(write-char (read-char pipe) out))))
#t)
(lambda ()
(close-pipe pipe))))))
;; Build a new gem from the current working directory. This also allows any
;; dynamic patching done in previous phases to be present in the installed
;; gem.
(zero? (system* "gem" "build" (first-gemspec))))
(define* (check #:key tests? test-target #:allow-other-keys)
"Run the gem's test suite rake task TEST-TARGET. Skip the tests if TESTS?
is #f."
(if tests?
(zero? (system* "rake" test-target))
#t))
(define* (install #:key inputs outputs (gem-flags '())
#:allow-other-keys)
"Install the gem archive SOURCE to the output store item. Additional
GEM-FLAGS are passed to the 'gem' invokation, if present."
(let* ((ruby-version
(match:substring (string-match "ruby-(.*)\\.[0-9]$"
(assoc-ref inputs "ruby"))
1))
(out (assoc-ref outputs "out"))
(gem-home (string-append out "/lib/ruby/gems/" ruby-version ".0")))
(setenv "GEM_HOME" gem-home)
(mkdir-p gem-home)
(zero? (apply system* "gem" "install" (first-matching-file "\\.gem$")
"--local" "--ignore-dependencies"
;; Executables should go into /bin, not /lib/ruby/gems.
"--bindir" (string-append out "/bin")
gem-flags))))
(define %standard-phases
(modify-phases gnu:%standard-phases
(delete 'configure)
(replace 'build build)
(replace 'unpack unpack)
(replace 'install install)
(replace 'check check)))
(define* (ruby-build #:key inputs (phases %standard-phases)
#:allow-other-keys #:rest args)
(apply gnu:gnu-build #:inputs inputs #:phases phases args))
(define (gem-home store-path ruby-version)
"Return a string to the gem home directory in the store given a STORE-PATH
and the RUBY-VERSION used to build that ruby package"
(string-append
store-path
"/lib/ruby/gems/"
(regexp-substitute #f
(string-match "^[0-9]+\\.[0-9]+" ruby-version)
0 ".0")))
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