Mercurial > piecrust2

annotate piecrust/processing/browserify.py @ 1067:c3b15ad24a93

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cm: Include Bootstrap dependencies in `package.json`.
author Ludovic Chabant <ludovic@chabant.com>
date Tue, 13 Feb 2018 21:53:11 -0800
parents c2bfa1869f0d
children a3dec0fbd9ce
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Ludovic Chabant <ludovic@chabant.com>
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1 import os
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2 import os.path
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3 import hashlib
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4 import logging
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5 import platform
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6 import subprocess
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7 from piecrust.processing.base import Processor, PRIORITY_FIRST, FORCE_BUILD
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8
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9
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10 logger = logging.getLogger(__name__)
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11
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12
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13 class BrowserifyProcessor(Processor):
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14 PROCESSOR_NAME = 'browserify'
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15
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16 def __init__(self):
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17 super(BrowserifyProcessor, self).__init__()
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18 self.priority = PRIORITY_FIRST
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19 self._tmp_dir = None
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20 self._conf = None
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21
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22 def initialize(self, app):
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23 super(BrowserifyProcessor, self).initialize(app)
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24
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25 self._conf = app.config.get('browserify')
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26 if self._conf is None:
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27 return
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28
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29 if self._conf is True:
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30 self._conf = {}
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31
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32 self._conf.setdefault('bin', 'browserify')
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33
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34 def onPipelineStart(self, ctx):
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35 self._tmp_dir = ctx.tmp_dir
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36
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37 def matches(self, path):
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38 return self._conf is not None and os.path.splitext(path)[1] == '.js'
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39
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40 def getDependencies(self, path):
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41 deps_path = self._getDepListPath(path)
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42 try:
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43 with open(deps_path, 'r', encoding='utf8') as f:
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44 deps_list = f.read()
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45 except OSError:
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46 logger.debug("No dependency list found for Browserify target '%s' "
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47 "at '%s'. Rebuilding" % (path, deps_path))
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48 return FORCE_BUILD
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49
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50 deps_list = [d.strip() for d in deps_list.split('\n')]
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51 return filter(lambda d: d, deps_list)
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52
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53 def getOutputFilenames(self, filename):
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54 return [filename]
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55
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56 def process(self, path, out_dir):
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57 # Update the dependency list file.
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58 # Sadly there doesn't seem to be a way to get the list at the same
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59 # time as compiling the bundle so we need to run the process twice :(
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60 deps_list = self._runBrowserify([path, '--list'])
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61 deps_list = deps_list.decode('utf8')
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62 deps_path = self._getDepListPath(path)
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63 with open(deps_path, 'w', encoding='utf8') as f:
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64 f.write(deps_list)
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65
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66 # Actually compile the JS bundle.
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67 out_path = os.path.join(out_dir, os.path.basename(path))
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68 self._runBrowserify([path, '-o', out_path])
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69
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70 return True
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71
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72 def _runBrowserify(self, args):
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73 args = [self._conf['bin']] + args
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74 cwd = self.app.root_dir
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75 logger.debug("Running Browserify: %s" % ' '.join(args))
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76 try:
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77 return subprocess.check_output(
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78 args,
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79 cwd=cwd,
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80 stderr=subprocess.STDOUT)
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81 except FileNotFoundError as ex:
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82 logger.error("Tried running Browserify with command: %s" % args)
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83 raise Exception("Error running Browserify. "
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84 "Did you install it?") from ex
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85 except subprocess.CalledProcessError as ex:
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86 logger.error("Error occured while running Browserify:")
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87 logger.info(ex.stdout)
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88 logger.error(ex.stderr)
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89 raise Exception("Error occured while running Browserify. "
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90 "Please check log messages above for "
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91 "more information.")
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92
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93 def _getDepListPath(self, path):
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94 deps_name = "%s_%s.deps" % (
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95 os.path.basename(path),
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96 hashlib.md5(path.encode('utf8')).hexdigest())
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97 deps_path = os.path.join(self._tmp_dir, deps_name)
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98 return deps_path
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99