Mercurial > piecrust2

annotate piecrust/processing/compressors.py @ 206:cba781477bd0

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processing: Add `concat`, `uglifyjs` and `cleancss` processors.
author Ludovic Chabant <ludovic@chabant.com>
date Sun, 18 Jan 2015 12:13:28 -0800
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children d1490028e211
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206
cba781477bd0 processing: Add `concat`, `uglifyjs` and `cleancss` processors.
Ludovic Chabant <ludovic@chabant.com>
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1 import os
cba781477bd0 processing: Add `concat`, `uglifyjs` and `cleancss` processors.
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2 import os.path
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3 import logging
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4 import platform
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5 import subprocess
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6 from piecrust.processing.base import SimpleFileProcessor
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7
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8
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9 logger = logging.getLogger(__name__)
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10
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11
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12 class CleanCssProcessor(SimpleFileProcessor):
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13 PROCESSOR_NAME = 'cleancss'
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14
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15 def __init__(self):
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16 super(CleanCssProcessor, self).__init__({'css': 'css'})
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17 self._conf = None
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18
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19 def _doProcess(self, in_path, out_path):
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20 self._ensureInitialized()
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21
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22 args = [self._conf['bin'], '-o', out_path]
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23 args += self._conf['options']
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24 args.append(in_path)
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25 logger.debug("Cleaning CSS file: %s" % args)
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26
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27 # On Windows, we need to run the process in a shell environment
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28 # otherwise it looks like `PATH` isn't taken into account.
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29 shell = (platform.system() == 'Windows')
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30 try:
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31 retcode = subprocess.call(args, shell=shell)
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32 except FileNotFoundError as ex:
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33 logger.error("Tried running CleanCSS processor with command: %s" %
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34 args)
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35 raise Exception("Error running CleanCSS processor. "
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36 "Did you install it?") from ex
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37 if retcode != 0:
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38 raise Exception("Error occured in CleanCSS. Please check "
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39 "log messages above for more information.")
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40 return True
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41
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42 def _ensureInitialized(self):
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43 if self._conf is not None:
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44 return
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45
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46 self._conf = self.app.config.get('cleancss') or {}
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47 self._conf.setdefault('bin', 'cleancss')
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48 self._conf.setdefault('options', ['--skip-rebase'])
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49 if not isinstance(self._conf['options'], list):
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50 raise Exception("The `cleancss/options` configuration setting "
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51 "must be an array of arguments.")
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52
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53
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54 class UglifyJSProcessor(SimpleFileProcessor):
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55 PROCESSOR_NAME = 'uglifyjs'
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56
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57 def __init__(self):
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58 super(UglifyJSProcessor, self).__init__({'js': 'js'})
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59 self._conf = None
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60
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61 def _doProcess(self, in_path, out_path):
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62 self._ensureInitialized()
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63
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64 args = [self._conf['bin'], in_path, '-o', out_path]
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65 args += self._conf['options']
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66 logger.debug("Uglifying JS file: %s" % args)
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67
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68 # On Windows, we need to run the process in a shell environment
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69 # otherwise it looks like `PATH` isn't taken into account.
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70 shell = (platform.system() == 'Windows')
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71 try:
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72 retcode = subprocess.call(args, shell=shell)
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73 except FileNotFoundError as ex:
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74 logger.error("Tried running UglifyJS processor with command: %s" %
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75 args)
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76 raise Exception("Error running UglifyJS processor. "
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77 "Did you install it?") from ex
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78 if retcode != 0:
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79 raise Exception("Error occured in UglifyJS. Please check "
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80 "log messages above for more information.")
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81 return True
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82
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83 def _ensureInitialized(self):
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84 if self._conf is not None:
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85 return
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86
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87 self._conf = self.app.config.get('uglifyjs') or {}
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88 self._conf.setdefault('bin', 'uglifyjs')
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89 self._conf.setdefault('options', ['--compress'])
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90 if not isinstance(self._conf['options'], list):
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91 raise Exception("The `uglify/options` configuration setting "
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92 "must be an array of arguments.")
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93