[pitivi] flatpak: Allow comments in json file

[Thibault Saunier <tsaunier src gnome org>]

commit 82ccf63d62049f81c48ff1e9eeef7135b15bcac2
Author: Thibault Saunier <tsaunier gnome org>
Date:   Sun Apr 30 14:01:11 2017 -0300

    flatpak: Allow comments in json file

 .pre-commit-config.yaml      |    1 -
 build/flatpak/pitivi-flatpak |    5 ++++-
 2 files changed, 4 insertions(+), 2 deletions(-)
---
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index d8e790f..0955605 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -3,7 +3,6 @@
     hooks:
     -   id: trailing-whitespace
     -   id: end-of-file-fixer
-    -   id: check-json
     -   id: autopep8-wrapper
         files: ^git-phab$
     -   id: check-docstring-first
diff --git a/build/flatpak/pitivi-flatpak b/build/flatpak/pitivi-flatpak
index ca5ac30..3918c4d 100755
--- a/build/flatpak/pitivi-flatpak
+++ b/build/flatpak/pitivi-flatpak
@@ -22,6 +22,7 @@ import argparse
 import configparser
 import json
 import os
+import re
 import shutil
 import subprocess
 import sys
@@ -80,7 +81,9 @@ def expand_json_file(json_template, outfile, basedir, gst_version, branchname):
         pass
 
     with open(json_template, "r") as tf:
-        template = json.load(tf)
+        txt = re.sub('/\*[^*]*\*+(?:[^/*][^*]*\*+)*/', '', tf.read())
+
+    template = json.loads(txt)
     if branchname == "stable":
         try:
             del template["desktop-file-name-prefix"]