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annotate light9/showconfig.py @ 943:3aae87f6777a

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vidref grab images for snapshots even if a song is not playing Ignore-this: 81b9b8c86a6326be3dd5a7d900f16a1b
author drewp@bigasterisk.com
date Thu, 13 Jun 2013 01:44:05 +0000
parents f6c73fafffe9
children 08814a44ae4e
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231a8b3aedc3 showconfig still reads n3 files on its own for legacy code. reads anything in top dir, not just config.n3 and patch.n3
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1 import time, logging, warnings
231a8b3aedc3 showconfig still reads n3 files on its own for legacy code. reads anything in top dir, not just config.n3 and patch.n3
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2 from twisted.python.filepath import FilePath
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3 from os import path, getenv
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4 from rdflib import Graph
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5 from rdflib import URIRef
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6 from namespaces import MUS, L9
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7 log = logging.getLogger('showconfig')
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8
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9 _config = None # graph
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10 def getGraph():
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11 warnings.warn("code that's using showconfig.getGraph should be "
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12 "converted to use the sync graph", stacklevel=2)
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13 global _config
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14 if _config is None:
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15 graph = Graph()
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16 for f in FilePath(root()).globChildren("*.n3") + FilePath(root()).globChildren("build/*.n3"):
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17 log.info("reading %s", f)
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18 graph.parse(location=f.path, format='n3')
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19 _config = graph
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20 return _config
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21
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22 def root():
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23 r = getenv("LIGHT9_SHOW")
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24 if r is None:
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25 raise OSError(
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26 "LIGHT9_SHOW env variable has not been set to the show root")
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27 return r
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28
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29 def showUri():
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30 """Return the show URI associated with $LIGHT9_SHOW."""
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31 return URIRef(file(path.join(root(), 'URI')).read().strip())
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32
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33 def findMpdHome():
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34 """top of the music directory for the mpd on this system,
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35 including trailing slash"""
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36
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37 mpdHome = None
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38 for mpdConfFilename in ["/my/dl/modified/mpd/src/mpdconf-testing",
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39 "~/.mpdconf", "/etc/mpd.conf"]:
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40 try:
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41 mpdConfFile = open(path.expanduser(mpdConfFilename))
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42 except IOError:
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43 continue
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44 for line in mpdConfFile:
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45 if line.startswith("music_directory"):
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46 mpdHome = line.split()[1].strip('"')
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47 return mpdHome.rstrip(path.sep) + path.sep
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48
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49 raise ValueError("can't find music_directory in any mpd config file")
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50
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51 def songOnDisk(song):
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52 """given a song URI, where's the on-disk file that mpd would read?"""
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53 graph = getGraph()
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54 root = graph.value(showUri(), L9['musicRoot'])
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55 if not root:
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56 raise ValueError("%s has no :musicRoot" % showUri())
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57
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58 name = graph.value(song, L9['songFilename'])
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59 if not name:
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60 raise ValueError("Song %r has no :songFilename" % song)
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61
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62 return path.abspath(path.join(root, name))
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63
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64 def songFilenameFromURI(uri):
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65 """
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66 'http://light9.bigasterisk.com/show/dance2007/song8' -> 'song8'
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67
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68 everything that uses this should be deprecated for real URIs
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69 everywhere"""
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70 assert isinstance(uri, URIRef)
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71 return uri.split('/')[-1]
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72
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73 def getSongsFromShow(graph, show):
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74 playList = graph.value(show, L9['playList'])
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75 if not playList:
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76 raise ValueError("%r has no l9:playList" % show)
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77 songs = list(graph.items(playList))
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78
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79 return songs
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80
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81 def curvesDir():
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82 return path.join(root(),"curves")
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83
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84 def songFilename(song):
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85 return path.join(root(), "music", "%s.wav" % song)
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86
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87 def subtermsForSong(song):
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88 return path.join(root(),"subterms",song)
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89
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90 def subFile(subname):
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91 return path.join(root(),"subs",subname)
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92
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93 def subsDir():
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94 return path.join(root(),'subs')
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95
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96 def prePostSong():
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97 graph = getGraph()
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98 return [graph.value(MUS['preSong'], L9['showPath']),
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99 graph.value(MUS['postSong'], L9['showPath'])]