gst1: Move all gi imports to a helper module

mopidy/__main__.py

@@ -4,26 +4,8 @@ import logging
 import os
 import signal
 import sys
-import textwrap
 
-try:
+from mopidy.internal.gi import Gst  # noqa: Import to initialize
-    import gi
-    gi.require_version('Gst', '1.0')
-    from gi.repository import Gst
-except ImportError:
-    print(textwrap.dedent("""
-        ERROR: The GStreamer Python package was not found.
-
-        Mopidy requires GStreamer to work. GStreamer is a C library with a
-        number of dependencies itself, and cannot be installed with the regular
-        Python tools like pip.
-
-        Please see http://docs.mopidy.com/en/latest/installation/ for
-        instructions on how to install the required dependencies.
-    """))
-    raise
-else:
-    Gst.init()
 
 try:
     # Make GObject's mainloop the event loop for python-dbus

mopidy/audio/actor.py

@@ -4,12 +4,6 @@ import logging
 import os
 import threading
 
-import gi
-gi.require_version('Gst', '1.0')
-gi.require_version('GstPbutils', '1.0')
-from gi.repository import GObject, Gst, GstPbutils
-Gst.is_initialized() or Gst.init()
-
 import pykka
 
 from mopidy import exceptions
@@ -17,6 +11,7 @@ from mopidy.audio import tags as tags_lib, utils
 from mopidy.audio.constants import PlaybackState
 from mopidy.audio.listener import AudioListener
 from mopidy.internal import deprecation, process
+from mopidy.internal.gi import GObject, Gst, GstPbutils
 
 
 logger = logging.getLogger(__name__)

mopidy/audio/scan.py

@@ -4,15 +4,10 @@ from __future__ import (
 import collections
 import time
 
-import gi
-gi.require_version('Gst', '1.0')
-gi.require_version('GstPbutils', '1.0')
-from gi.repository import Gst, GstPbutils
-Gst.is_initialized() or Gst.init()
-
 from mopidy import exceptions
 from mopidy.audio import tags as tags_lib, utils
 from mopidy.internal import encoding
+from mopidy.internal.gi import Gst, GstPbutils
 
 # GST_ELEMENT_FACTORY_LIST:
 _DECODER = 1 << 0

mopidy/audio/tags.py

@@ -5,13 +5,9 @@ import datetime
 import logging
 import numbers
 
-import gi
-gi.require_version('Gst', '1.0')
-from gi.repository import GLib, Gst
-Gst.is_initialized() or Gst.init()
-
 from mopidy import compat
 from mopidy.internal import log
+from mopidy.internal.gi import GLib, Gst
 from mopidy.models import Album, Artist, Track
 
 

mopidy/audio/utils.py

@@ -1,10 +1,7 @@
 from __future__ import absolute_import, unicode_literals
 
-import gi
-gi.require_version('Gst', '1.0')
-from gi.repository import Gst
-
 from mopidy import httpclient
+from mopidy.internal.gi import Gst
 
 
 def calculate_duration(num_samples, sample_rate):

mopidy/internal/deps.py

@@ -5,14 +5,10 @@ import os
 import platform
 import sys
 
-import gi
-gi.require_version('Gst', '1.0')
-from gi.repository import Gst
-Gst.is_initialized() or Gst.init()
-
 import pkg_resources
 
 from mopidy.internal import formatting
+from mopidy.internal.gi import Gst, gi
 
 
 def format_dependency_list(adapters=None):

mopidy/internal/gi.py

@@ -0,0 +1,33 @@
+from __future__ import absolute_import, unicode_literals
+
+import textwrap
+
+
+try:
+    import gi
+    gi.require_version('Gst', '1.0')
+    gi.require_version('GstPbutils', '1.0')
+    from gi.repository import GLib, GObject, Gst, GstPbutils
+except ImportError:
+    print(textwrap.dedent("""
+        ERROR: A GObject Python package was not found.
+
+        Mopidy requires GStreamer to work. GStreamer is a C library with a
+        number of dependencies itself, and cannot be installed with the regular
+        Python tools like pip.
+
+        Please see http://docs.mopidy.com/en/latest/installation/ for
+        instructions on how to install the required dependencies.
+    """))
+    raise
+else:
+    Gst.is_initialized() or Gst.init()
+
+
+__all__ = [
+    'GLib',
+    'GObject',
+    'Gst',
+    'GstPbutils',
+    'gi',
+]

tests/audio/test_actor.py

@@ -3,10 +3,6 @@ from __future__ import absolute_import, unicode_literals
 import threading
 import unittest
 
-import gi
-gi.require_version('Gst', '1.0')
-from gi.repository import Gst
-
 import mock
 
 import pykka
@@ -14,6 +10,7 @@ import pykka
 from mopidy import audio
 from mopidy.audio.constants import PlaybackState
 from mopidy.internal import path
+from mopidy.internal.gi import Gst
 
 from tests import dummy_audio, path_to_data_dir
 

tests/audio/test_tags.py

@@ -4,12 +4,9 @@ from __future__ import absolute_import, unicode_literals
 
 import unittest
 
-import gi
-gi.require_version('Gst', '1.0')
-from gi.repository import GLib, GObject, Gst
-
 from mopidy import compat
 from mopidy.audio import tags
+from mopidy.internal.gi import GLib, GObject, Gst
 from mopidy.models import Album, Artist, Track
 
 

tests/audio/test_utils.py

@@ -1,12 +1,9 @@
 from __future__ import absolute_import, unicode_literals
 
-import gi
-gi.require_version('Gst', '1.0')
-from gi.repository import Gst
-
 import pytest
 
 from mopidy.audio import utils
+from mopidy.internal.gi import Gst
 
 
 class TestCreateBuffer(object):

tests/internal/test_deps.py

@@ -4,15 +4,12 @@ import platform
 import sys
 import unittest
 
-import gi
-gi.require_version('Gst', '1.0')
-from gi.repository import Gst
-
 import mock
 
 import pkg_resources
 
 from mopidy.internal import deps
+from mopidy.internal.gi import Gst, gi
 
 
 class DepsTest(unittest.TestCase):