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annotate piecrust/processing/less.py @ 16:3a13b43e77c1

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Correctly set the current page on a pagination slicer.
author Ludovic Chabant <ludovic@chabant.com>
date Mon, 18 Aug 2014 16:51:38 -0700
parents 343d08ef5668
children de6a296744f7
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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1 import os
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2 import os.path
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3 import json
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4 import hashlib
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5 import logging
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6 import subprocess
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7 from piecrust.processing.base import SimpleFileProcessor
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8 from piecrust.processing.tree import FORCE_BUILD
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9
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11 logger = logging.getLogger(__name__)
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12
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13
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14 class LessProcessor(SimpleFileProcessor):
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15 PROCESSOR_NAME = 'less'
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16
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17 def __init__(self):
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18 super(LessProcessor, self).__init__({'less': 'css'})
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19 self._conf = None
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20 self._map_dir = None
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21
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22 def onPipelineStart(self, pipeline):
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23 self._map_dir = os.path.join(pipeline.tmp_dir, 'less')
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24 if not os.path.isdir(self._map_dir):
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25 os.makedirs(self._map_dir)
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26
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27 def getDependencies(self, path):
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28 map_path = self._getMapPath(path)
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29 try:
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30 with open(map_path, 'r') as f:
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31 dep_map = json.load(f)
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32 source = dep_map.get('sources')
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33 # The last one is always the file itself, so skip that. Also,
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34 # make all paths absolute.
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35 path_dir = os.path.dirname(path)
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36 def _makeAbs(p):
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37 return os.path.join(path_dir, p)
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38 return list(map(_makeAbs, source[:-1]))
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39 except IOError:
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40 # Map file not found... rebuild.
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41 logger.debug("No map file found for LESS file '%s' at '%s'. "
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42 "Rebuilding" % (path, map_path))
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43 return FORCE_BUILD
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44
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45 def _doProcess(self, in_path, out_path):
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46 self._ensureInitialized()
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47
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48 map_path = self._getMapPath(in_path)
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49 map_path = os.path.relpath(map_path)
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50 args = [self._conf['bin'], '--source-map=%s' % map_path]
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51 args += self._conf['options']
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52 args.append(in_path)
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53 args.append(out_path)
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54 logger.debug("Processing LESS file: %s" % args)
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55 retcode = subprocess.call(args)
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56 if retcode != 0:
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57 raise Exception("Error occured in LESS compiler. Please check "
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58 "log messages above for more information.")
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59 return True
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60
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61 def _ensureInitialized(self):
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62 if self._conf is not None:
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63 return
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64
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65 self._conf = self.app.config.get('less') or {}
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66 self._conf.setdefault('bin', 'lessc')
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67 self._conf.setdefault('options',
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68 ['--compress'])
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69 if not isinstance(self._conf['options'], list):
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70 raise Exception("The `less/options` configuration setting "
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71 "must be an array of arguments.")
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72
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73 def _getMapPath(self, path):
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74 map_name = "%s.map" % hashlib.md5(path.encode('utf8')).hexdigest()
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75 map_path = os.path.join(self._map_dir, map_name)
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76 return map_path
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77