build-system: Add renpy-build-system.

* guix/build/renpy-build-system.scm: New file.
* guix/build-system/renpy.scm: New file.
* Makefile.am (MODULES): Add them here.
* doc/guix.texi (Build Systems): Document renpy-build-system.

1 files changed, 99 insertions, 0 deletions

diff --git a/guix/build/renpy-build-system.scm b/guix/build/renpy-build-system.scm
new file mode 100644
index 0000000000..464fc97b13
--- /dev/null
+++ b/guix/build/renpy-build-system.scm
@@ -0,0 +1,99 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2021 Leo Prikler <leo.prikler@student.tugraz.at>
+;;;
+;;; 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 renpy-build-system)
+  #:use-module ((guix build gnu-build-system) #:prefix gnu:)
+  #:use-module ((guix build python-build-system) #:prefix python:)
+  #:use-module (guix build json)
+  #:use-module (guix build utils)
+  #:use-module (ice-9 match)
+  #:use-module (ice-9 ftw)
+  #:use-module (srfi srfi-1)
+  #:use-module (srfi srfi-26)
+  #:export (%standard-phases
+            renpy-build))
+
+(define* (build #:key game #:allow-other-keys)
+  (for-each make-file-writable
+            (find-files game (lambda (pred stat)
+                               (eq? (stat:type stat) 'directory))))
+  (invoke "renpy"
+          "--json-dump" (string-append game "/renpy-build.json")
+          game
+          ;; should be "compile", but renpy wants to compile itself really
+          ;; badly if we do
+          "quit")
+  #t)
+
+(define* (install #:key outputs game (output "out") #:allow-other-keys)
+  (let* ((out (assoc-ref outputs output))
+         (json-dump (call-with-input-file (string-append game
+                                                         "/renpy-build.json")
+                      read-json))
+         (build (assoc-ref json-dump "build"))
+         (executable-name (assoc-ref build "executable_name"))
+         (directory-name (assoc-ref build "directory_name")))
+    (let ((launcher (string-append out "/bin/" executable-name))
+          (data (string-append out "/share/renpy/" directory-name)))
+      (mkdir-p (string-append out "/bin"))
+      (copy-recursively game data)
+      ;; We don't actually want the metadata to be dumped in the output
+      ;; directory
+      (delete-file (string-append data "/renpy-build.json"))
+      (call-with-output-file launcher
+        (lambda (port)
+          (format port "#!~a~%~a ~a \"$@\""
+                  (which "bash")
+                  (which "renpy")
+                  data)))
+      (chmod launcher #o755)))
+  #t)
+
+(define* (install-desktop-file #:key outputs game (output "out")
+                               #:allow-other-keys)
+  (let* ((out (assoc-ref outputs output))
+         (json-dump (call-with-input-file (string-append game
+                                                         "/renpy-build.json")
+                      read-json))
+         (build (assoc-ref json-dump "build"))
+         (directory-name (assoc-ref build "directory_name"))
+         (executable-name (assoc-ref build "executable_name")))
+    (make-desktop-entry-file
+     (string-append out "/share/applications/" executable-name ".desktop")
+     #:name (assoc-ref json-dump "name")
+     #:generic-name (assoc-ref build "display_name")
+     #:exec (string-append (which "renpy") " "
+                           out "/share/renpy/" directory-name)
+     #:categories '("Game" "Visual Novel")))
+  #t)
+
+(define %standard-phases
+  (modify-phases gnu:%standard-phases
+    (add-after 'unpack 'enable-bytecode-determinism
+      (assoc-ref python:%standard-phases 'enable-bytecode-determinism))
+    (delete 'bootstrap)
+    (delete 'configure)
+    (replace 'build build)
+    (delete 'check)
+    (replace 'install install)
+    (add-after 'install 'install-desktop-file install-desktop-file)))
+
+(define* (renpy-build #:key inputs (phases %standard-phases)
+                       #:allow-other-keys #:rest args)
+  "Build the given Ren'py package, applying all of PHASES in order."
+  (apply gnu:gnu-build #:inputs inputs #:phases phases args))