Re: New build system: copy-build-system

[Jesse Gibbons <jgibbons2357@gmail.com>]

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Hi Pierre,
On Fri, 2020-02-14 at 13:54 +0100, Pierre Neidhardt wrote:
> 	Error verifying signature: Failed to execute gpg.
> I've just sent a patch: 39599@debbugs.gnu.org.
> 
> Ideally, it would need a bit more testing with a package that has
> subdirectories.
> Any good suggestion?
> 
Thank you for making this amazing time-saver!

Attached is an early version of a good candidate. It's a wrapper script
for clojure taken from from clojure's brew installer.

src/main/resources/clojure should be moved to bin/
src/main/resources/cl
j should be moved to bin/

doc/clojure.1 should be moved to share/man/

And unless there's a sufficient reason not to,
epl.html could be moved to share/doc/clojure-1.10.1/


Everything else could probably be ignored.

Since I'm patching one of the scripts to play better with guix, the
source will become a tarball. I would rather not worry about extracting
everything, moving some things, and deleting what is not used.

If your patches are pushed before you get this, I will make the package
myself. But it's a complex yet useful example of a package that would
be simpler with the copy-build-system, so you can check how easy it is
to change from trivial-build-system and test how well copy-build-system 
works with subdirectories.

-Jesse

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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2018 Alex Vong <alexvong1995@gmail.com>
;;; Copyright © 2018 Pierre Neidhardt <mail@ambrevar.xyz>
;;; Copyright © 2019 Tobias Geerinckx-Rice <me@tobias.gr>
;;; Copyright © 2020 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 (clojure)
  #:use-module (gnu packages)
  #:use-module ((guix licenses) #:prefix license:)
  #:use-module (guix packages)
  #:use-module (guix download)
  #:use-module (guix git-download)
  #:use-module (guix build-system ant)
  #:use-module (guix build-system clojure)
  #:use-module (guix build-system trivial)
  #:use-module (ice-9 match))

(define-public clojure-wrapper
       (package
        (name "clojure-wrapper")
        (version "1.10.1.507")
        (source
         (origin
          (method git-fetch)
          (uri (git-reference
                (url "https://github.com/clojure/brew-install.git")
                (commit version)))
          (file-name (git-file-name name version))
          (sha256
           (base32 "1zipz22pszv4vls4qhxkia8gm86s1wkahr0jdbqhc46mpd8n54fz"))))
        (build-system trivial-build-system)
        (arguments
         `(#:modules ((guix build utils))
           #:builder (begin
                     (use-modules (guix build utils))
                     (let* ((out (assoc-ref %outputs "out"))
                            (bin-dir (string-append out "/bin/"))
                            (source (assoc-ref %build-inputs "source"))
                            (script-dir
                             (string-append source "/src/main/resources/"))
                                         (scripts '("clojure" "clj")))
		       (mkdir out)
		       (mkdir bin-dir)
                           (map (lambda (script)
				  (copy-file (string-append script-dir script)
					     (string-append bin-dir script)))
                                scripts)))))
		     
        (synopsis "Clojure launch scripts")
        (description "Scripts to launch clojure from the command line.
Without these scripts a user would need to run jar with the clojure jar's
location. Who would want to do that?")
        (home-page "https://clojure.org/")
        (license license:epl1.0)))