From 5fcc4e67aa12eff00bfa3d56109bbde6f01ff59a Mon Sep 17 00:00:00 2001
From: Stein Magnus Jodal <stein.magnus@jodal.no>
Date: Fri, 31 Aug 2012 21:55:01 +0200
Subject: [PATCH 01/14] Add --list-deps command with Pykka adapter

---
 mopidy/core.py           |  4 ++++
 mopidy/utils/deps.py     | 43 ++++++++++++++++++++++++++++++++++++++++
 tests/utils/deps_test.py | 27 +++++++++++++++++++++++++
 3 files changed, 74 insertions(+)
 create mode 100644 mopidy/utils/deps.py
 create mode 100644 tests/utils/deps_test.py

diff --git a/mopidy/core.py b/mopidy/core.py
index 596e0fe5..9ae461d8 100644
--- a/mopidy/core.py
+++ b/mopidy/core.py
@@ -22,6 +22,7 @@ from mopidy import (get_version, settings, OptionalDependencyError,
     SettingsError, DATA_PATH, SETTINGS_PATH, SETTINGS_FILE)
 from mopidy.gstreamer import GStreamer
 from mopidy.utils import get_class
+from mopidy.utils.deps import list_deps_optparse_callback
 from mopidy.utils.log import setup_logging
 from mopidy.utils.path import get_or_create_folder, get_or_create_file
 from mopidy.utils.process import (exit_handler, stop_remaining_actors,
@@ -77,6 +78,9 @@ def parse_options():
     parser.add_option('--list-settings',
         action='callback', callback=list_settings_optparse_callback,
         help='list current settings')
+    parser.add_option('--list-deps',
+        action='callback', callback=list_deps_optparse_callback,
+        help='list dependencies and their versions')
     return parser.parse_args(args=mopidy_args)[0]
 
 def check_old_folders():
diff --git a/mopidy/utils/deps.py b/mopidy/utils/deps.py
new file mode 100644
index 00000000..7e6bdc11
--- /dev/null
+++ b/mopidy/utils/deps.py
@@ -0,0 +1,43 @@
+import sys
+
+import pykka
+
+
+def list_deps_optparse_callback(*args):
+    """
+    Prints a list of all dependencies.
+
+    Called by optparse when Mopidy is run with the :option:`--list-deps`
+    option.
+    """
+    print format_dependency_list()
+    sys.exit(0)
+
+
+def format_dependency_list(adapters=None):
+    if adapters is None:
+        adapters = [
+            pykka_info,
+        ]
+
+    lines = []
+    for adapter in adapters:
+        dep_info = adapter()
+        lines.append('%(name)s: %(version)s' % dep_info)
+        if 'path' in dep_info:
+            lines.append('  Imported from: %(path)s' % dep_info)
+    return '\n'.join(lines)
+
+
+def pykka_info():
+    if hasattr(pykka, '__version__'):
+        # Pykka >= 0.14
+        version = pykka.__version__
+    else:
+        # Pykka < 0.14
+        version = pykka.get_version()
+    return {
+        'name': 'Pykka',
+        'version': version,
+        'path': pykka.__file__,
+    }
diff --git a/tests/utils/deps_test.py b/tests/utils/deps_test.py
new file mode 100644
index 00000000..f6d8c942
--- /dev/null
+++ b/tests/utils/deps_test.py
@@ -0,0 +1,27 @@
+import pykka
+
+from mopidy.utils import deps
+
+from tests import unittest
+
+
+class DepsTest(unittest.TestCase):
+    def test_format_dependency_list(self):
+        adapters = [
+            lambda: dict(name='Python', version='FooPython 2.7.3'),
+            lambda: dict(name='Platform', version='Loonix 4.0.1'),
+            lambda: dict(name='Pykka', version='0.1337', path='/foo/bar/baz')
+        ]
+
+        result = deps.format_dependency_list(adapters)
+
+        self.assertIn('Python: FooPython 2.7.3', result)
+        self.assertIn('Platform: Loonix 4.0.1', result)
+        self.assertIn('Imported from: /foo/bar/baz', result)
+
+    def test_pykka_info(self):
+        result = deps.pykka_info()
+
+        self.assertEquals('Pykka', result['name'])
+        self.assertEquals(pykka.__version__, result['version'])
+        self.assertIn('pykka', result['path'])

From a25e7d95306a02ab52011cf383a9b28b9c3b39d7 Mon Sep 17 00:00:00 2001
From: Stein Magnus Jodal <stein.magnus@jodal.no>
Date: Fri, 31 Aug 2012 22:14:02 +0200
Subject: [PATCH 02/14] Add pyspotify adapter for --list-deps

---
 mopidy/utils/deps.py     | 27 ++++++++++++++++++++++++++-
 tests/utils/deps_test.py | 14 +++++++++++++-
 2 files changed, 39 insertions(+), 2 deletions(-)

diff --git a/mopidy/utils/deps.py b/mopidy/utils/deps.py
index 7e6bdc11..febca8dc 100644
--- a/mopidy/utils/deps.py
+++ b/mopidy/utils/deps.py
@@ -2,6 +2,8 @@ import sys
 
 import pykka
 
+from mopidy.utils.log import indent
+
 
 def list_deps_optparse_callback(*args):
     """
@@ -18,14 +20,21 @@ def format_dependency_list(adapters=None):
     if adapters is None:
         adapters = [
             pykka_info,
+            pyspotify_info,
         ]
 
     lines = []
     for adapter in adapters:
         dep_info = adapter()
-        lines.append('%(name)s: %(version)s' % dep_info)
+        lines.append('%(name)s: %(version)s' % {
+            'name': dep_info['name'],
+            'version': dep_info.get('version', 'not found'),
+        })
         if 'path' in dep_info:
             lines.append('  Imported from: %(path)s' % dep_info)
+        if 'other' in dep_info:
+            lines.append('  Other: %s' % (
+                indent(dep_info['other'])),)
     return '\n'.join(lines)
 
 
@@ -41,3 +50,19 @@ def pykka_info():
         'version': version,
         'path': pykka.__file__,
     }
+
+
+def pyspotify_info():
+    dep_info = {'name': 'pyspotify'}
+    try:
+        import spotify
+        if hasattr(spotify, '__version__'):
+            dep_info['version'] = spotify.__version__
+        else:
+            dep_info['version'] = '< 1.3'
+        dep_info['path'] = spotify.__file__
+        dep_info['other'] = 'Built for libspotify API version %d' % (
+            spotify.api_version,)
+    except ImportError:
+        pass
+    return dep_info
diff --git a/tests/utils/deps_test.py b/tests/utils/deps_test.py
index f6d8c942..a2d07b18 100644
--- a/tests/utils/deps_test.py
+++ b/tests/utils/deps_test.py
@@ -1,4 +1,5 @@
 import pykka
+import spotify
 
 from mopidy.utils import deps
 
@@ -10,14 +11,16 @@ class DepsTest(unittest.TestCase):
         adapters = [
             lambda: dict(name='Python', version='FooPython 2.7.3'),
             lambda: dict(name='Platform', version='Loonix 4.0.1'),
-            lambda: dict(name='Pykka', version='0.1337', path='/foo/bar/baz')
+            lambda: dict(name='Pykka', path='/foo/bar/baz', other='Quux')
         ]
 
         result = deps.format_dependency_list(adapters)
 
         self.assertIn('Python: FooPython 2.7.3', result)
         self.assertIn('Platform: Loonix 4.0.1', result)
+        self.assertIn('Pykka: not found', result)
         self.assertIn('Imported from: /foo/bar/baz', result)
+        self.assertIn('Quux', result)
 
     def test_pykka_info(self):
         result = deps.pykka_info()
@@ -25,3 +28,12 @@ class DepsTest(unittest.TestCase):
         self.assertEquals('Pykka', result['name'])
         self.assertEquals(pykka.__version__, result['version'])
         self.assertIn('pykka', result['path'])
+
+    def test_pyspotify_info(self):
+        result = deps.pyspotify_info()
+
+        self.assertEquals('pyspotify', result['name'])
+        self.assertEquals(spotify.__version__, result['version'])
+        self.assertIn('spotify', result['path'])
+        self.assertIn('Built for libspotify API version', result['other'])
+        self.assertIn(str(spotify.api_version), result['other'])

From 4c6a6af487c95051be281d2bfc41a758a22acac8 Mon Sep 17 00:00:00 2001
From: Stein Magnus Jodal <stein.magnus@jodal.no>
Date: Fri, 31 Aug 2012 22:40:08 +0200
Subject: [PATCH 03/14] Add Gstreamer adapter for --list-deps

---
 mopidy/utils/deps.py     | 15 +++++++++++++++
 tests/utils/deps_test.py | 13 +++++++++++++
 2 files changed, 28 insertions(+)

diff --git a/mopidy/utils/deps.py b/mopidy/utils/deps.py
index febca8dc..1b4d8be8 100644
--- a/mopidy/utils/deps.py
+++ b/mopidy/utils/deps.py
@@ -1,5 +1,9 @@
 import sys
 
+import pygst
+pygst.require('0.10')
+import gst
+
 import pykka
 
 from mopidy.utils.log import indent
@@ -19,6 +23,7 @@ def list_deps_optparse_callback(*args):
 def format_dependency_list(adapters=None):
     if adapters is None:
         adapters = [
+            gstreamer_info,
             pykka_info,
             pyspotify_info,
         ]
@@ -38,6 +43,16 @@ def format_dependency_list(adapters=None):
     return '\n'.join(lines)
 
 
+def gstreamer_info():
+    return {
+        'name': 'Gstreamer',
+        'version': '.'.join(map(str, gst.get_gst_version())),
+        'path': gst.__file__,
+        'other': 'Python wrapper: gst-python %s' % (
+            '.'.join(map(str, gst.get_pygst_version()))),
+    }
+
+
 def pykka_info():
     if hasattr(pykka, '__version__'):
         # Pykka >= 0.14
diff --git a/tests/utils/deps_test.py b/tests/utils/deps_test.py
index a2d07b18..acf29b29 100644
--- a/tests/utils/deps_test.py
+++ b/tests/utils/deps_test.py
@@ -1,3 +1,7 @@
+import pygst
+pygst.require('0.10')
+import gst
+
 import pykka
 import spotify
 
@@ -22,6 +26,15 @@ class DepsTest(unittest.TestCase):
         self.assertIn('Imported from: /foo/bar/baz', result)
         self.assertIn('Quux', result)
 
+    def test_gstreamer_info(self):
+        result = deps.gstreamer_info()
+
+        self.assertEquals('Gstreamer', result['name'])
+        self.assertEquals('.'.join(map(str, gst.get_gst_version())), result['version'])
+        self.assertIn('gst', result['path'])
+        self.assertIn('Python wrapper: gst-python', result['other'])
+        self.assertIn('.'.join(map(str, gst.get_pygst_version())), result['other'])
+
     def test_pykka_info(self):
         result = deps.pykka_info()
 

From 4284e08d699cdd528d389f56e77d1c37b6bd05cd Mon Sep 17 00:00:00 2001
From: Stein Magnus Jodal <stein.magnus@jodal.no>
Date: Fri, 31 Aug 2012 22:46:18 +0200
Subject: [PATCH 04/14] Strip file name from printed import paths

---
 mopidy/utils/deps.py     | 4 +++-
 tests/utils/deps_test.py | 5 +++--
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/mopidy/utils/deps.py b/mopidy/utils/deps.py
index 1b4d8be8..37f76c27 100644
--- a/mopidy/utils/deps.py
+++ b/mopidy/utils/deps.py
@@ -1,3 +1,4 @@
+import os
 import sys
 
 import pygst
@@ -36,7 +37,8 @@ def format_dependency_list(adapters=None):
             'version': dep_info.get('version', 'not found'),
         })
         if 'path' in dep_info:
-            lines.append('  Imported from: %(path)s' % dep_info)
+            lines.append('  Imported from: %s' % (
+                os.path.dirname(dep_info['path'])))
         if 'other' in dep_info:
             lines.append('  Other: %s' % (
                 indent(dep_info['other'])),)
diff --git a/tests/utils/deps_test.py b/tests/utils/deps_test.py
index acf29b29..67ca11ae 100644
--- a/tests/utils/deps_test.py
+++ b/tests/utils/deps_test.py
@@ -15,7 +15,7 @@ class DepsTest(unittest.TestCase):
         adapters = [
             lambda: dict(name='Python', version='FooPython 2.7.3'),
             lambda: dict(name='Platform', version='Loonix 4.0.1'),
-            lambda: dict(name='Pykka', path='/foo/bar/baz', other='Quux')
+            lambda: dict(name='Pykka', path='/foo/bar/baz.py', other='Quux')
         ]
 
         result = deps.format_dependency_list(adapters)
@@ -23,7 +23,8 @@ class DepsTest(unittest.TestCase):
         self.assertIn('Python: FooPython 2.7.3', result)
         self.assertIn('Platform: Loonix 4.0.1', result)
         self.assertIn('Pykka: not found', result)
-        self.assertIn('Imported from: /foo/bar/baz', result)
+        self.assertIn('Imported from: /foo/bar', result)
+        self.assertNotIn('/baz.py', result)
         self.assertIn('Quux', result)
 
     def test_gstreamer_info(self):

From a661b6d8486d1a6b0ba9e9d7e5b6156bde9f86c2 Mon Sep 17 00:00:00 2001
From: Stein Magnus Jodal <stein.magnus@jodal.no>
Date: Fri, 31 Aug 2012 22:49:59 +0200
Subject: [PATCH 05/14] Add pylast adapter for --list-deps

---
 mopidy/utils/deps.py     | 12 ++++++++++++
 tests/utils/deps_test.py |  8 ++++++++
 2 files changed, 20 insertions(+)

diff --git a/mopidy/utils/deps.py b/mopidy/utils/deps.py
index 37f76c27..f72f9cc1 100644
--- a/mopidy/utils/deps.py
+++ b/mopidy/utils/deps.py
@@ -27,6 +27,7 @@ def format_dependency_list(adapters=None):
             gstreamer_info,
             pykka_info,
             pyspotify_info,
+            pylast_info,
         ]
 
     lines = []
@@ -83,3 +84,14 @@ def pyspotify_info():
     except ImportError:
         pass
     return dep_info
+
+
+def pylast_info():
+    dep_info = {'name': 'pylast'}
+    try:
+        import pylast
+        dep_info['version'] = pylast.__version__
+        dep_info['path'] = pylast.__file__
+    except ImportError:
+        pass
+    return dep_info
diff --git a/tests/utils/deps_test.py b/tests/utils/deps_test.py
index 67ca11ae..4df31eef 100644
--- a/tests/utils/deps_test.py
+++ b/tests/utils/deps_test.py
@@ -3,6 +3,7 @@ pygst.require('0.10')
 import gst
 
 import pykka
+import pylast
 import spotify
 
 from mopidy.utils import deps
@@ -51,3 +52,10 @@ class DepsTest(unittest.TestCase):
         self.assertIn('spotify', result['path'])
         self.assertIn('Built for libspotify API version', result['other'])
         self.assertIn(str(spotify.api_version), result['other'])
+
+    def test_pylast_info(self):
+        result = deps.pylast_info()
+
+        self.assertEquals('pylast', result['name'])
+        self.assertEquals(pylast.__version__, result['version'])
+        self.assertIn('pylast', result['path'])

From 6e01b320d79c07649e0e501039bd4ee3232dd4d6 Mon Sep 17 00:00:00 2001
From: Stein Magnus Jodal <stein.magnus@jodal.no>
Date: Fri, 31 Aug 2012 22:57:29 +0200
Subject: [PATCH 06/14] Skip tests for unavailable optional deps

---
 tests/utils/deps_test.py | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/tests/utils/deps_test.py b/tests/utils/deps_test.py
index 4df31eef..a0b4fe07 100644
--- a/tests/utils/deps_test.py
+++ b/tests/utils/deps_test.py
@@ -1,10 +1,17 @@
 import pygst
 pygst.require('0.10')
 import gst
-
 import pykka
-import pylast
-import spotify
+
+try:
+    import pylast
+except ImportError:
+    pylast = False
+
+try:
+    import spotify
+except ImportError:
+    spotify = False
 
 from mopidy.utils import deps
 
@@ -44,6 +51,7 @@ class DepsTest(unittest.TestCase):
         self.assertEquals(pykka.__version__, result['version'])
         self.assertIn('pykka', result['path'])
 
+    @unittest.skipUnless(spotify, 'pyspotify not found')
     def test_pyspotify_info(self):
         result = deps.pyspotify_info()
 
@@ -53,6 +61,7 @@ class DepsTest(unittest.TestCase):
         self.assertIn('Built for libspotify API version', result['other'])
         self.assertIn(str(spotify.api_version), result['other'])
 
+    @unittest.skipUnless(pylast, 'pylast not found')
     def test_pylast_info(self):
         result = deps.pylast_info()
 

From 240ab0d2269b5aba51e4f2d3f6aff8a9f0e652a1 Mon Sep 17 00:00:00 2001
From: Stein Magnus Jodal <stein.magnus@jodal.no>
Date: Fri, 31 Aug 2012 22:58:26 +0200
Subject: [PATCH 07/14] Add dbus adapter for --list-deps

---
 mopidy/utils/deps.py     | 12 ++++++++++++
 tests/utils/deps_test.py | 13 +++++++++++++
 2 files changed, 25 insertions(+)

diff --git a/mopidy/utils/deps.py b/mopidy/utils/deps.py
index f72f9cc1..ffb69f5b 100644
--- a/mopidy/utils/deps.py
+++ b/mopidy/utils/deps.py
@@ -28,6 +28,7 @@ def format_dependency_list(adapters=None):
             pykka_info,
             pyspotify_info,
             pylast_info,
+            dbus_info,
         ]
 
     lines = []
@@ -95,3 +96,14 @@ def pylast_info():
     except ImportError:
         pass
     return dep_info
+
+
+def dbus_info():
+    dep_info = {'name': 'dbus-python'}
+    try:
+        import dbus
+        dep_info['version'] = dbus.__version__
+        dep_info['path'] = dbus.__file__
+    except ImportError:
+        pass
+    return dep_info
diff --git a/tests/utils/deps_test.py b/tests/utils/deps_test.py
index a0b4fe07..988e2e84 100644
--- a/tests/utils/deps_test.py
+++ b/tests/utils/deps_test.py
@@ -3,6 +3,11 @@ pygst.require('0.10')
 import gst
 import pykka
 
+try:
+    import dbus
+except ImportError:
+    dbus = False
+
 try:
     import pylast
 except ImportError:
@@ -68,3 +73,11 @@ class DepsTest(unittest.TestCase):
         self.assertEquals('pylast', result['name'])
         self.assertEquals(pylast.__version__, result['version'])
         self.assertIn('pylast', result['path'])
+
+    @unittest.skipUnless(dbus, 'dbus not found')
+    def test_dbus_info(self):
+        result = deps.dbus_info()
+
+        self.assertEquals('dbus-python', result['name'])
+        self.assertEquals(dbus.__version__, result['version'])
+        self.assertIn('dbus', result['path'])

From 44b63070468876486834f539a3b85b4bd1280e11 Mon Sep 17 00:00:00 2001
From: Stein Magnus Jodal <stein.magnus@jodal.no>
Date: Fri, 31 Aug 2012 23:13:15 +0200
Subject: [PATCH 08/14] Add pyserial adapter for --list-deps

---
 mopidy/utils/deps.py     | 12 ++++++++++++
 tests/utils/deps_test.py | 13 +++++++++++++
 2 files changed, 25 insertions(+)

diff --git a/mopidy/utils/deps.py b/mopidy/utils/deps.py
index ffb69f5b..8403c400 100644
--- a/mopidy/utils/deps.py
+++ b/mopidy/utils/deps.py
@@ -29,6 +29,7 @@ def format_dependency_list(adapters=None):
             pyspotify_info,
             pylast_info,
             dbus_info,
+            serial_info,
         ]
 
     lines = []
@@ -107,3 +108,14 @@ def dbus_info():
     except ImportError:
         pass
     return dep_info
+
+
+def serial_info():
+    dep_info = {'name': 'pyserial'}
+    try:
+        import serial
+        dep_info['version'] = serial.VERSION
+        dep_info['path'] = serial.__file__
+    except ImportError:
+        pass
+    return dep_info
diff --git a/tests/utils/deps_test.py b/tests/utils/deps_test.py
index 988e2e84..968d23b0 100644
--- a/tests/utils/deps_test.py
+++ b/tests/utils/deps_test.py
@@ -13,6 +13,11 @@ try:
 except ImportError:
     pylast = False
 
+try:
+    import serial
+except ImportError:
+    serial = False
+
 try:
     import spotify
 except ImportError:
@@ -81,3 +86,11 @@ class DepsTest(unittest.TestCase):
         self.assertEquals('dbus-python', result['name'])
         self.assertEquals(dbus.__version__, result['version'])
         self.assertIn('dbus', result['path'])
+
+    @unittest.skipUnless(serial, 'serial not found')
+    def test_serial_info(self):
+        result = deps.serial_info()
+
+        self.assertEquals('pyserial', result['name'])
+        self.assertEquals(serial.VERSION, result['version'])
+        self.assertIn('serial', result['path'])

From 05c935bc4c24fe8ebb8c6002a67dc33a5171312f Mon Sep 17 00:00:00 2001
From: Stein Magnus Jodal <stein.magnus@jodal.no>
Date: Fri, 31 Aug 2012 23:59:53 +0200
Subject: [PATCH 09/14] Add Python impl adapter for --list-deps

---
 mopidy/utils/deps.py     | 11 +++++++++++
 tests/utils/deps_test.py | 10 ++++++++++
 2 files changed, 21 insertions(+)

diff --git a/mopidy/utils/deps.py b/mopidy/utils/deps.py
index 8403c400..f0755202 100644
--- a/mopidy/utils/deps.py
+++ b/mopidy/utils/deps.py
@@ -1,4 +1,5 @@
 import os
+import platform
 import sys
 
 import pygst
@@ -24,6 +25,7 @@ def list_deps_optparse_callback(*args):
 def format_dependency_list(adapters=None):
     if adapters is None:
         adapters = [
+            python_info,
             gstreamer_info,
             pykka_info,
             pyspotify_info,
@@ -48,6 +50,15 @@ def format_dependency_list(adapters=None):
     return '\n'.join(lines)
 
 
+def python_info():
+    return {
+        'name': 'Python',
+        'version': '%s %s' % (platform.python_implementation(),
+            platform.python_version()),
+        'path': platform.__file__,
+    }
+
+
 def gstreamer_info():
     return {
         'name': 'Gstreamer',
diff --git a/tests/utils/deps_test.py b/tests/utils/deps_test.py
index 968d23b0..18ec2fe9 100644
--- a/tests/utils/deps_test.py
+++ b/tests/utils/deps_test.py
@@ -1,3 +1,5 @@
+import platform
+
 import pygst
 pygst.require('0.10')
 import gst
@@ -45,6 +47,14 @@ class DepsTest(unittest.TestCase):
         self.assertNotIn('/baz.py', result)
         self.assertIn('Quux', result)
 
+    def test_python_info(self):
+        result = deps.python_info()
+
+        self.assertEquals('Python', result['name'])
+        self.assertIn(platform.python_implementation(), result['version'])
+        self.assertIn(platform.python_version(), result['version'])
+        self.assertIn('python', result['path'])
+
     def test_gstreamer_info(self):
         result = deps.gstreamer_info()
 

From 41853dd3d878b46a617db03f26180f50a20ad1cc Mon Sep 17 00:00:00 2001
From: Stein Magnus Jodal <stein.magnus@jodal.no>
Date: Sat, 1 Sep 2012 00:00:14 +0200
Subject: [PATCH 10/14] Add platform adapter for --list-deps

---
 mopidy/utils/deps.py     | 8 ++++++++
 tests/utils/deps_test.py | 6 ++++++
 2 files changed, 14 insertions(+)

diff --git a/mopidy/utils/deps.py b/mopidy/utils/deps.py
index f0755202..f2b89840 100644
--- a/mopidy/utils/deps.py
+++ b/mopidy/utils/deps.py
@@ -25,6 +25,7 @@ def list_deps_optparse_callback(*args):
 def format_dependency_list(adapters=None):
     if adapters is None:
         adapters = [
+            platform_info,
             python_info,
             gstreamer_info,
             pykka_info,
@@ -50,6 +51,13 @@ def format_dependency_list(adapters=None):
     return '\n'.join(lines)
 
 
+def platform_info():
+    return {
+        'name': 'Platform',
+        'version': platform.platform(),
+    }
+
+
 def python_info():
     return {
         'name': 'Python',
diff --git a/tests/utils/deps_test.py b/tests/utils/deps_test.py
index 18ec2fe9..26ef7c5c 100644
--- a/tests/utils/deps_test.py
+++ b/tests/utils/deps_test.py
@@ -47,6 +47,12 @@ class DepsTest(unittest.TestCase):
         self.assertNotIn('/baz.py', result)
         self.assertIn('Quux', result)
 
+    def test_platform_info(self):
+        result = deps.platform_info()
+
+        self.assertEquals('Platform', result['name'])
+        self.assertIn(platform.platform(), result['version'])
+
     def test_python_info(self):
         result = deps.python_info()
 

From d712551c3f346eb17b42e0000c6197d3e340a00c Mon Sep 17 00:00:00 2001
From: Stein Magnus Jodal <stein.magnus@jodal.no>
Date: Sat, 1 Sep 2012 00:16:39 +0200
Subject: [PATCH 11/14] Add list of Gstreamer elements to checck in --list-deps

---
 mopidy/utils/deps.py     | 57 ++++++++++++++++++++++++++++++++++++++--
 tests/utils/deps_test.py |  1 +
 2 files changed, 56 insertions(+), 2 deletions(-)

diff --git a/mopidy/utils/deps.py b/mopidy/utils/deps.py
index f2b89840..13b48dc0 100644
--- a/mopidy/utils/deps.py
+++ b/mopidy/utils/deps.py
@@ -68,15 +68,68 @@ def python_info():
 
 
 def gstreamer_info():
+    other = []
+    other.append('Python wrapper: gst-python %s' % (
+        '.'.join(map(str, gst.get_pygst_version()))))
+    other.append('Elements:')
+    for name, status in _gstreamer_check_elements():
+        other.append('  %s: %s' % (name, status))
     return {
         'name': 'Gstreamer',
         'version': '.'.join(map(str, gst.get_gst_version())),
         'path': gst.__file__,
-        'other': 'Python wrapper: gst-python %s' % (
-            '.'.join(map(str, gst.get_pygst_version()))),
+        'other': '\n'.join(other),
     }
 
 
+def _gstreamer_check_elements():
+    elements_to_check = [
+        # Core playback
+        'uridecodebin',
+
+        # External HTTP streams
+        'souphttpsrc',
+
+        # Spotify
+        'appsrc',
+
+        # Mixers and sinks
+        'alsamixer',
+        'alsasink',
+        'ossmixer',
+        'osssink',
+        'oss4mixer',
+        'oss4sink',
+        'pulsemixer',
+        'pulsesink',
+
+        # MP3 encoding and decoding
+        'mp3parse',
+        'mad',
+        'id3demux',
+        'id3v2mux',
+        'lame',
+
+        # Ogg Vorbis encoding and decoding
+        'vorbisdec',
+        'vorbisenc',
+        'vorbisparse',
+        'oggdemux',
+        'oggmux',
+        'oggparse',
+
+        # Flac decoding
+        'flacdec',
+        'flacparse',
+
+        # Shoutcast output
+        'shout2send',
+    ]
+    known_elements = [factory.get_name() for factory in
+        gst.registry_get_default().get_feature_list(gst.TYPE_ELEMENT_FACTORY)]
+    return [(element, element in known_elements) for element in elements_to_check]
+
+
 def pykka_info():
     if hasattr(pykka, '__version__'):
         # Pykka >= 0.14
diff --git a/tests/utils/deps_test.py b/tests/utils/deps_test.py
index 26ef7c5c..9c623da0 100644
--- a/tests/utils/deps_test.py
+++ b/tests/utils/deps_test.py
@@ -69,6 +69,7 @@ class DepsTest(unittest.TestCase):
         self.assertIn('gst', result['path'])
         self.assertIn('Python wrapper: gst-python', result['other'])
         self.assertIn('.'.join(map(str, gst.get_pygst_version())), result['other'])
+        self.assertIn('Elements:', result['other'])
 
     def test_pykka_info(self):
         result = deps.pykka_info()

From 45086fb11dbe37a1c493b2124147b514a3009d0a Mon Sep 17 00:00:00 2001
From: Stein Magnus Jodal <stein.magnus@jodal.no>
Date: Sat, 1 Sep 2012 00:20:53 +0200
Subject: [PATCH 12/14] Update changelog with --list-deps option (fixes #74)

---
 docs/changes.rst | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/docs/changes.rst b/docs/changes.rst
index 4dcc8c57..2c697ca4 100644
--- a/docs/changes.rst
+++ b/docs/changes.rst
@@ -18,6 +18,10 @@ v0.8 (in development)
   Track position and CPID was intermixed, so it would cause a crash if a CPID
   matching the track position didn't exist. (Fixes: :issue:`162`)
 
+- Added :option:`--list-deps` option to :cmd:`mopidy` command that lists
+  required and optional dependencies, their current versions, and some other
+  information useful for debugging. (Fixes: :issue:`74`)
+
 
 v0.7.3 (2012-08-11)
 ===================

From a452c49bd3ed4c55658440dc17d58e8f8b1402ce Mon Sep 17 00:00:00 2001
From: Stein Magnus Jodal <stein.magnus@jodal.no>
Date: Sat, 1 Sep 2012 00:49:12 +0200
Subject: [PATCH 13/14] We're only considering a small subset of the Gstreamer
 elements

---
 mopidy/utils/deps.py     | 2 +-
 tests/utils/deps_test.py | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/mopidy/utils/deps.py b/mopidy/utils/deps.py
index 13b48dc0..40b53174 100644
--- a/mopidy/utils/deps.py
+++ b/mopidy/utils/deps.py
@@ -71,7 +71,7 @@ def gstreamer_info():
     other = []
     other.append('Python wrapper: gst-python %s' % (
         '.'.join(map(str, gst.get_pygst_version()))))
-    other.append('Elements:')
+    other.append('Relevant elements:')
     for name, status in _gstreamer_check_elements():
         other.append('  %s: %s' % (name, status))
     return {
diff --git a/tests/utils/deps_test.py b/tests/utils/deps_test.py
index 9c623da0..9898b59f 100644
--- a/tests/utils/deps_test.py
+++ b/tests/utils/deps_test.py
@@ -69,7 +69,7 @@ class DepsTest(unittest.TestCase):
         self.assertIn('gst', result['path'])
         self.assertIn('Python wrapper: gst-python', result['other'])
         self.assertIn('.'.join(map(str, gst.get_pygst_version())), result['other'])
-        self.assertIn('Elements:', result['other'])
+        self.assertIn('Relevant elements:', result['other'])
 
     def test_pykka_info(self):
         result = deps.pykka_info()

From f6cea72bf713796c274b9e475305c688adb2f86f Mon Sep 17 00:00:00 2001
From: Stein Magnus Jodal <stein.magnus@jodal.no>
Date: Sat, 1 Sep 2012 00:49:47 +0200
Subject: [PATCH 14/14] Print 'OK' or 'not found' instead of True/False

---
 mopidy/utils/deps.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mopidy/utils/deps.py b/mopidy/utils/deps.py
index 40b53174..7fce55db 100644
--- a/mopidy/utils/deps.py
+++ b/mopidy/utils/deps.py
@@ -73,7 +73,7 @@ def gstreamer_info():
         '.'.join(map(str, gst.get_pygst_version()))))
     other.append('Relevant elements:')
     for name, status in _gstreamer_check_elements():
-        other.append('  %s: %s' % (name, status))
+        other.append('  %s: %s' % (name, 'OK' if status else 'not found'))
     return {
         'name': 'Gstreamer',
         'version': '.'.join(map(str, gst.get_gst_version())),