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comparison 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
parents
children d1490028e211
comparison
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205:e725af1d48fb 206:cba781477bd0
1 import os
2 import os.path
3 import logging
4 import platform
5 import subprocess
6 from piecrust.processing.base import SimpleFileProcessor
7
8
9 logger = logging.getLogger(__name__)
10
11
12 class CleanCssProcessor(SimpleFileProcessor):
13 PROCESSOR_NAME = 'cleancss'
14
15 def __init__(self):
16 super(CleanCssProcessor, self).__init__({'css': 'css'})
17 self._conf = None
18
19 def _doProcess(self, in_path, out_path):
20 self._ensureInitialized()
21
22 args = [self._conf['bin'], '-o', out_path]
23 args += self._conf['options']
24 args.append(in_path)
25 logger.debug("Cleaning CSS file: %s" % args)
26
27 # On Windows, we need to run the process in a shell environment
28 # otherwise it looks like `PATH` isn't taken into account.
29 shell = (platform.system() == 'Windows')
30 try:
31 retcode = subprocess.call(args, shell=shell)
32 except FileNotFoundError as ex:
33 logger.error("Tried running CleanCSS processor with command: %s" %
34 args)
35 raise Exception("Error running CleanCSS processor. "
36 "Did you install it?") from ex
37 if retcode != 0:
38 raise Exception("Error occured in CleanCSS. Please check "
39 "log messages above for more information.")
40 return True
41
42 def _ensureInitialized(self):
43 if self._conf is not None:
44 return
45
46 self._conf = self.app.config.get('cleancss') or {}
47 self._conf.setdefault('bin', 'cleancss')
48 self._conf.setdefault('options', ['--skip-rebase'])
49 if not isinstance(self._conf['options'], list):
50 raise Exception("The `cleancss/options` configuration setting "
51 "must be an array of arguments.")
52
53
54 class UglifyJSProcessor(SimpleFileProcessor):
55 PROCESSOR_NAME = 'uglifyjs'
56
57 def __init__(self):
58 super(UglifyJSProcessor, self).__init__({'js': 'js'})
59 self._conf = None
60
61 def _doProcess(self, in_path, out_path):
62 self._ensureInitialized()
63
64 args = [self._conf['bin'], in_path, '-o', out_path]
65 args += self._conf['options']
66 logger.debug("Uglifying JS file: %s" % args)
67
68 # On Windows, we need to run the process in a shell environment
69 # otherwise it looks like `PATH` isn't taken into account.
70 shell = (platform.system() == 'Windows')
71 try:
72 retcode = subprocess.call(args, shell=shell)
73 except FileNotFoundError as ex:
74 logger.error("Tried running UglifyJS processor with command: %s" %
75 args)
76 raise Exception("Error running UglifyJS processor. "
77 "Did you install it?") from ex
78 if retcode != 0:
79 raise Exception("Error occured in UglifyJS. Please check "
80 "log messages above for more information.")
81 return True
82
83 def _ensureInitialized(self):
84 if self._conf is not None:
85 return
86
87 self._conf = self.app.config.get('uglifyjs') or {}
88 self._conf.setdefault('bin', 'uglifyjs')
89 self._conf.setdefault('options', ['--compress'])
90 if not isinstance(self._conf['options'], list):
91 raise Exception("The `uglify/options` configuration setting "
92 "must be an array of arguments.")
93