docs: Use requirement files as single source of dependencies

mopidy/audio/mixers/nad.py

@@ -1,11 +1,11 @@
 """Mixer that controls volume using a NAD amplifier.
 
+The NAD amplifier must be connected to the machine running Mopidy using a
+serial cable.
+
 **Dependencies:**
 
-- pyserial (python-serial in Debian/Ubuntu)
-
-- The NAD amplifier must be connected to the machine running Mopidy using a
-  serial cable.
+.. literalinclude:: ../../../../requirements/external_mixers.txt
 
 **Settings:**
 

mopidy/backends/spotify/__init__.py

@@ -20,8 +20,7 @@ https://github.com/mopidy/mopidy/issues?labels=Spotify+backend
 
 **Dependencies:**
 
-- libspotify >= 12, < 13 (libspotify12 package from apt.mopidy.com)
-- pyspotify >= 1.9, < 1.11 (python-spotify package from apt.mopidy.com)
+.. literalinclude:: ../../../requirements/spotify.txt
 
 **Settings:**
 

mopidy/frontends/http/__init__.py

@@ -4,9 +4,7 @@ from a web based client.
 
 **Dependencies**
 
-- ``cherrypy``
-
-- ``ws4py``
+.. literalinclude:: ../../../requirements/http.txt
 
 **Settings**
 

mopidy/frontends/lastfm.py

@@ -8,7 +8,7 @@ Frontend which scrobbles the music you play to your `Last.fm
 
 **Dependencies:**
 
-- `pylast <http://code.google.com/p/pylast/>`_ >= 0.5.7
+.. literalinclude:: ../../../requirements/lastfm.txt
 
 **Settings:**
 

requirements/README.rst

@@ -3,8 +3,8 @@ pip requirement files
 *********************
 
 The files found here are `requirement files
-<http://pip.openplans.org/requirement-format.html>`_ that may be used with `pip
-<http://pip.openplans.org/>`_.
+<http://www.pip-installer.org/en/latest/requirements.html>`_ that may be used
+with `pip <http://www.pip-installer.org/>`_.
 
 To install the dependencies found in one of these files, simply run e.g.::
 

requirements/core.txt

@@ -1 +1,2 @@
 Pykka >= 1.0
+# Available as python-pykka from apt.mopidy.com

requirements/external_mixers.txt

@@ -1 +1,2 @@
 pyserial
+# Available as python-serial in Debian/Ubuntu

requirements/http.txt

@@ -1,2 +1,5 @@
 cherrypy >= 3.2.2
+# Available as python-cherrypy3 in Debian/Ubuntu
+
 ws4py >= 0.2.3
+# Available as python-ws4py from apt.mopidy.com

requirements/lastfm.txt

@@ -1 +1,3 @@
 pylast >= 0.5.7
+# Available as python-pylast in newer Debian/Ubuntu and from apt.mopidy.com for
+# older releases of Debian/Ubuntu

requirements/spotify.txt

@@ -1 +1,8 @@
 pyspotify >= 1.9, < 1.11
+# The libspotify Python wrapper
+# Available as the python-spotify package from apt.mopidy.com
+
+# libspotify >= 12, < 13
+# The libspotify C library from
+# https://developer.spotify.com/technologies/libspotify/
+# Available as the libspotify12 package from apt.mopidy.com