[damned-lies] Allow read of meson.build data_dirs gettext parameter

[Claude Paroz <claudep src gnome org>]

commit e46aba9212a6bd6f6f7a63f6bd1cbfc19e7d9a46
Author: Claude Paroz <claude 2xlibre net>
Date:   Wed Mar 28 13:48:30 2018 +0200

    Allow read of meson.build data_dirs gettext parameter
    
    Fixes bug #794742.

 stats/models.py             |    6 ++++++
 stats/tests/meson-ui2.build |   10 ++++++++++
 stats/tests/tests.py        |    9 +++++++++
 stats/utils.py              |   14 ++++++++++++--
 4 files changed, 37 insertions(+), 2 deletions(-)
---
diff --git a/stats/models.py b/stats/models.py
index 0327be4..77eb135 100644
--- a/stats/models.py
+++ b/stats/models.py
@@ -931,6 +931,12 @@ class Domain(models.Model):
                 extra_args = makefile.read_variable('gettext.args')
                 if extra_args:
                     pot_command.extend(extra_args)
+                datadirs = makefile.read_variable('gettext.data_dirs')
+                if datadirs:
+                    env['GETTEXTDATADIRS'] = ':'.join(
+                        [env['GETTEXTDATADIRS']] +
+                        [str(branch.co_path / path) for path in datadirs]
+                    )
         # Added last as some chars in it may disturb CLI parsing
         bugs_url = self.module.get_bugs_enter_url()
         if bugs_url:
diff --git a/stats/tests/meson-ui2.build b/stats/tests/meson-ui2.build
new file mode 100644
index 0000000..cfac442
--- /dev/null
+++ b/stats/tests/meson-ui2.build
@@ -0,0 +1,10 @@
+i18n.gettext('gnome-builder',
+  preset: 'glib',
+  args: [
+    '--msgid-bugs-address=https://gitlab.gnome.org/GNOME/gnome-builder/issues',
+  ],
+  data_dirs: [
+    join_paths(meson.source_root(), 'src/gstyle/data'),
+    join_paths(meson.source_root(), 'data/style-schemes')
+  ],
+)
diff --git a/stats/tests/tests.py b/stats/tests/tests.py
index 61fa27b..73f4036 100644
--- a/stats/tests/tests.py
+++ b/stats/tests/tests.py
@@ -585,6 +585,15 @@ class UtilsTests(TestCase):
         self.assertEqual(meson_file.read_variable('gettext.preset'), 'glib')
         self.assertEqual(meson_file.read_variable('gettext.args'), ['--keyword=Description'])
 
+        # UI meson file (with data_dirs)
+        path = Path(__file__).parent / "meson-ui2.build"
+        meson_file = utils.MesonfileWrapper(self.branch, path)
+        self.assertEqual(
+            meson_file.read_variable('gettext.data_dirs'),
+            [str(self.branch.co_path / 'src/gstyle/data'),
+             str(self.branch.co_path / 'data/style-schemes')]
+        )
+
     def test_read_cmake_variables(self):
         domain = Domain.objects.create(
             module=self.mod, name='help', dtype='doc', directory='help_mallard'
diff --git a/stats/utils.py b/stats/utils.py
index 97f7758..4ba10ac 100644
--- a/stats/utils.py
+++ b/stats/utils.py
@@ -234,15 +234,25 @@ class MesonfileWrapper(MakefileWrapper):
 
             def gettext(self, *args, **kwargs):
                 catched['gettext.project_id'] = args[0]
-                for var_name in {'languages', 'args', 'preset'}:
+                for var_name in MesonfileWrapper.i18n_gettext_kwargs:
                     if var_name in kwargs:
                         catched['gettext.%s' % var_name] = kwargs[var_name]
 
         catcher = VarCatcher()
+        this_instance = self
+
+        class MesonMock:
+            def __getattr__(self, name):
+                return MagicMock()
+
+            def source_root(self):
+                return str(this_instance.branch.co_path)
+
         meson_locals = {
             'gnome': catcher, 'i18n': catcher,
             'GNOME': catcher, 'I18N': catcher,
-            'install_data': MagicMock(), 'meson': MagicMock(),
+            'install_data': MagicMock(), 'meson': MesonMock(),
+            'join_paths': lambda *args: os.sep.join(args),
         }
         while True:
             try: