[damned-lies] Pass env variables from get_xgettext_command

[Claude Paroz <claudep src gnome org>]

commit bcb67dfee36993aefe6103d6154d9cb20ed51b5a
Author: Claude Paroz <claude 2xlibre net>
Date:   Mon Mar 26 19:10:13 2018 +0200

    Pass env variables from get_xgettext_command
    
    Fixes bug #794702.

 stats/models.py      |    4 ++--
 stats/tests/tests.py |    6 ++++--
 2 files changed, 6 insertions(+), 4 deletions(-)
---
diff --git a/stats/models.py b/stats/models.py
index a0ae524..494ead8 100644
--- a/stats/models.py
+++ b/stats/models.py
@@ -846,7 +846,7 @@ class Domain(models.Model):
 
         elif self.pot_method == GETTEXT_METHOD or (
                 current_branch.uses_meson and not self.pot_method):
-            pot_command = self.get_xgettext_command(current_branch)
+            pot_command, env = self.get_xgettext_command(current_branch)
 
         elif self.pot_method == INTLTOOL_METHOD or not self.pot_method:
             # fallback is intltool
@@ -935,7 +935,7 @@ class Domain(models.Model):
         bugs_url = self.module.get_bugs_enter_url()
         if bugs_url:
             pot_command.extend(['--msgid-bugs-address', bugs_url])
-        return pot_command
+        return pot_command, env
 
     def get_linguas(self, base_path):
         """ Return a linguas dict like this: {'langs':['lang1', lang2], 'error':"Error"} """
diff --git a/stats/tests/tests.py b/stats/tests/tests.py
index 57bc56c..64282b6 100644
--- a/stats/tests/tests.py
+++ b/stats/tests/tests.py
@@ -122,10 +122,12 @@ class ModuleTestCase(TestCase):
         domain = self.branch.get_domains()['po']
         self.assertEqual(
             domain.get_xgettext_command(self.branch),
-            ['xgettext', '--files-from', 'POTFILES.in', '--directory',
+            (['xgettext', '--files-from', 'POTFILES.in', '--directory',
              '/home/claude/www/damned-lies/cvs/git/gnome-hello', '--from-code', 'utf-8',
              '--add-comments', '--output', 'gnome-hello.pot', '--msgid-bugs-address',
-             'https://bugzilla.gnome.org/enter_bug.cgi?product=test&keywords=I18N+L10N&component=test']
+             'https://bugzilla.gnome.org/enter_bug.cgi?product=test&keywords=I18N+L10N&component=test'],
+             {'GETTEXTDATADIRS': os.path.dirname(utils.ITS_DATA_DIR)}
+            )
         )
 
     @test_scratchdir