[gimp] build: workaround python2 crashes in Flatpak.

[Jehan Pagès <jehanp src gnome org>]

commit c8ebd043aa361fbd966cf206130611bdc728e679
Author: Jehan <jehan girinstud io>
Date:   Mon Feb 13 05:09:59 2017 +0100

    build: workaround python2 crashes in Flatpak.
    
    See the upstream issue where python2 would crash on some platforms, yet
    not others: https://github.com/flatpak/flatpak/issues/143
    For this, I disable introspection on GEGL (which is anyway not useful
    in the Flatpak build, I believe), and wrap gdbus-codegen in a temporary
    build script for GIMP to force it to use Python 3 (I can't force
    globally the $PYTHON environment variable like on Webkit because GIMP
    needs Python 2 as dependency).

 build/flatpak/org.gimp.GIMP.json |   16 +++++++++++++++-
 1 files changed, 15 insertions(+), 1 deletions(-)
---
diff --git a/build/flatpak/org.gimp.GIMP.json b/build/flatpak/org.gimp.GIMP.json
index 28b3e45..2c53cd0 100644
--- a/build/flatpak/org.gimp.GIMP.json
+++ b/build/flatpak/org.gimp.GIMP.json
@@ -295,7 +295,7 @@
         },
         {
             "name": "gegl",
-            "config-opts": [ "--disable-docs" ],
+            "config-opts": [ "--disable-docs", "--disable-introspection" ],
             "cleanup": [ "/bin" ],
             "sources": [
                 {
@@ -317,11 +317,25 @@
         },
         {
             "name": "gimp",
+            "build-options" : {
+                "env": {
+                    "PATH": "/run/build/gimp/tmp-bin:/app/bin:/usr/bin"
+                }
+            },
             "config-opts": [ "--disable-docs", "--disable-gtk-doc", "--disable-gtk-doc-html", 
"--enable-vector-icons" ],
             "sources": [
                 {
                     "type": "git",
                     "url": "git://git.gnome.org/gimp"
+                },
+                {
+                    "type": "script",
+                    "commands": [
+                        "#!/bin/sh",
+                        "python3 /usr/bin/gdbus-codegen $@"
+                    ],
+                    "dest-filename": "gdbus-codegen",
+                    "dest": "tmp-bin/"
                 }
             ]
         }