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annotate light9/showconfig.py @ 2187:ccdfdc8183ad

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remove py2-style 'object' superclass
author drewp@bigasterisk.com
date Fri, 19 May 2023 21:14:01 -0700
parents 17bee25a20cb
children
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1 import logging, warnings
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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, Literal
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6 from .namespaces import L9
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7 from typing import List, cast
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8 log = logging.getLogger('showconfig')
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10 _config = None # graph
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12
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13 def getGraph() -> Graph:
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14 warnings.warn(
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15 "code that's using showconfig.getGraph should be "
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16 "converted to use the sync graph",
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17 stacklevel=2)
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18 global _config
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19 if _config is None:
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20 graph = Graph()
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21 # note that logging is probably not configured the first time
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22 # we're in here
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23 warnings.warn("reading n3 files around %r" % root())
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24 for f in FilePath(root()).globChildren("*.n3") + FilePath(
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25 root()).globChildren("build/*.n3"):
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26 graph.parse(location=f.path, format='n3')
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27 _config = graph
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28 return _config
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31 def root() -> bytes:
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32 r = getenv("LIGHT9_SHOW")
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33 if r is None:
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34 raise OSError(
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35 "LIGHT9_SHOW env variable has not been set to the show root")
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36 return r.encode('ascii')
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38
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39 _showUri = None
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41
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42 def showUri() -> URIRef:
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43 """Return the show URI associated with $LIGHT9_SHOW."""
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44 global _showUri
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45 if _showUri is None:
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46 _showUri = URIRef(open(path.join(root(), b'URI')).read().strip())
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47 return _showUri
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50 def songOnDisk(song: URIRef) -> bytes:
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51 """given a song URI, where's the on-disk file that mpd would read?"""
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52 graph = getGraph()
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53 root = graph.value(showUri(), L9['musicRoot'])
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54 if not root:
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55 raise ValueError("%s has no :musicRoot" % showUri())
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56
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57 name = graph.value(song, L9['songFilename'])
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58 if not name:
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59 raise ValueError("Song %r has no :songFilename" % song)
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60
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61 return path.abspath(
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62 path.join(
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63 cast(Literal, root).toPython(),
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64 cast(Literal, name).toPython()))
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67 def songFilenameFromURI(uri: URIRef) -> bytes:
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68 """
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69 'http://light9.bigasterisk.com/show/dance2007/song8' -> 'song8'
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70
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71 everything that uses this should be deprecated for real URIs
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72 everywhere"""
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73 assert isinstance(uri, URIRef)
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74 return str(uri).split('/')[-1].encode('ascii')
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77 def getSongsFromShow(graph: Graph, show: URIRef) -> List[URIRef]:
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78 playList = graph.value(show, L9['playList'])
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79 if not playList:
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80 raise ValueError("%r has no l9:playList" % show)
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81 # The patch in https://github.com/RDFLib/rdflib/issues/305 fixed a
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82 # serious bug here.
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83 songs = list(graph.items(playList))
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85 return songs
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88 def curvesDir():
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89 return path.join(root(), b"curves")
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92 def subFile(subname):
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93 return path.join(root(), b"subs", subname)
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96 def subsDir():
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97 return path.join(root(), b'subs')