From fbe9747d0043dec8a9a012bf1aff2a54391a7ebb Mon Sep 17 00:00:00 2001
From: Jan Nieuwenhuizen <janneke@gnu.org>
Date: Fri, 29 Jun 2018 20:06:22 +0200
Subject: [PATCH] guix: Add guix package build.

* guix.scm: New file.
---
 guix.scm | 122 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 122 insertions(+)
 create mode 100644 guix.scm

diff --git a/guix.scm b/guix.scm
new file mode 100644
index 0000000..ef6e48f
--- /dev/null
+++ b/guix.scm
@@ -0,0 +1,122 @@
+;;; guix.scm -- Guix package definition
+
+;;; Mes --- Maxwell Equations of Software
+;;; Copyright © 2016,2017,2018 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
+
+;;; Also borrowing code from:
+;;; guile-sdl2 --- FFI bindings for SDL2
+;;; Copyright © 2015 David Thompson <davet@gnu.org>
+
+;;;
+;;; guix.scm: This file is part of Mes.
+;;;
+;;; Mes 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.
+;;;
+;;; Mes 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 Mes.  If not, see <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+;;
+;; GNU Guix development package.  To build and install, run:
+;;
+;;   guix package -f guix.scm
+;;
+;; To build it, but not install it, run:
+;;
+;;   guix build -f guix.scm
+;;
+;; To use as the basis for a development environment, run:
+;;
+;;   guix environment -l guix.scm
+;;
+;;; Code:
+
+(use-modules (srfi srfi-1)
+             (srfi srfi-26)
+             (ice-9 match)
+             (ice-9 popen)
+             (ice-9 rdelim)
+             (gnu packages)
+             (gnu packages base)
+             (gnu packages commencement)
+             (gnu packages cross-base)
+             (gnu packages gcc)
+             (gnu packages guile)
+             (gnu packages mes)
+             (gnu packages package-management)
+             (gnu packages perl)
+             ((guix build utils) #:select (with-directory-excursion))
+             (guix build-system gnu)
+             (guix build-system trivial)
+             (guix gexp)
+             (guix download)
+             (guix git-download)
+             (guix licenses)
+             (guix packages))
+
+(define %source-dir (dirname (current-filename)))
+
+(define git-file?
+  (let* ((pipe (with-directory-excursion %source-dir
+                 (open-pipe* OPEN_READ "git" "ls-files")))
+         (files (let loop ((lines '()))
+                  (match (read-line pipe)
+                    ((? eof-object?)
+                     (reverse lines))
+                    (line
+                     (loop (cons line lines))))))
+         (status (close-pipe pipe)))
+    (lambda (file stat)
+      (match (stat:type stat)
+        ('directory #t)
+        ((or 'regular 'symlink)
+         (any (cut string-suffix? <> file) files))
+        (_ #f)))))
+
+(define-public gash
+  (let ((commit "7b9871478b573e14fa94a84f3585c2cbed6f02a3")
+        (revision "0")
+        (version "0.1"))
+    (package
+      (name "gash")
+      (version (string-append version "-" revision "." (string-take commit 7)))
+      (source (origin
+                (method git-fetch)
+                (uri (git-reference
+                      (url "https://gitlab.com/janneke/gash")
+                      (commit commit)))
+                (file-name (string-append name "-" version))
+                (sha256
+                 (base32 "11708vl2f04xpgs57mac4z7illx6wf4ybb32mh9ajfwimlkvwl4f"))))
+      (build-system gnu-build-system)
+      (inputs
+       `(("guile" ,guile-2.2)
+         ("guile-readline" ,guile-readline)))
+      (synopsis "A POSIX compliant sh replacement for Guile.")
+      (description
+       "Gash [Guile As Shell] aims to produce at least a POSIX compliant sh replacement
+or even implement GNU bash.  On top of that it also intends to make
+scheme available for interactive and scripting application.")
+      (home-page "https://gitlab.com/rutger.van.beusekom/gash")
+      (license gpl3+))))
+
+(define-public gash.git
+ (let ((version "0.1")
+        (revision "0")
+        (commit (read-string (open-pipe "git show HEAD | head -1 | cut -d ' ' -f 2" OPEN_READ))))
+    (package
+      (inherit gash)
+      (name "gash.git")
+      (version (string-append version "-" revision "." (string-take commit 7)))
+      (source (local-file %source-dir #:recursive? #t #:select? git-file?)))))
+
+;; Return it here so `guix build/environment/package' can consume it directly.
+gash.git