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annotate piecrust/sources/fs.py @ 852:4850f8c21b6e

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core: Start of the big refactor for PieCrust 3.0. * Everything is a `ContentSource`, including assets directories. * Most content sources are subclasses of the base file-system source. * A source is processed by a "pipeline", and there are 2 built-in pipelines, one for assets and one for pages. The asset pipeline is vaguely functional, but the page pipeline is completely broken right now. * Rewrite the baking process as just running appropriate pipelines on each content item. This should allow for better parallelization.
author Ludovic Chabant <ludovic@chabant.com>
date Wed, 17 May 2017 00:11:48 -0700
parents
children f070a4fc033c
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rev   line source
852
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
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1 import os.path
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2 import logging
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3 from piecrust import osutil
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4 from piecrust.routing import RouteParameter
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5 from piecrust.sources.base import ContentItem, ContentGroup, ContentSource
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6
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7
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8 logger = logging.getLogger(__name__)
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10
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11 class InvalidFileSystemEndpointError(Exception):
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12 def __init__(self, source_name, fs_endpoint):
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13 super(InvalidFileSystemEndpointError, self).__init__(
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14 "Invalid file-system endpoint for source '%s': %s" %
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15 (source_name, fs_endpoint))
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16
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17
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18 def _filter_crap_files(f):
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19 return (f[-1] != '~' and # Vim temp files and what-not
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20 f not in ['.DS_Store', 'Thumbs.db']) # OSX and Windows bullshit
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21
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22
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23 class FSContentSourceBase(ContentSource):
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24 """ Implements some basic stuff for a `ContentSource` that stores its
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25 items as files on disk.
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26 """
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27 def __init__(self, app, name, config):
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28 super().__init__(app, name, config)
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29 self.fs_endpoint = config.get('fs_endpoint', name)
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30 self.fs_endpoint_path = os.path.join(self.root_dir, self.fs_endpoint)
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31 self._fs_filter = None
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32
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33 def _checkFSEndpoint(self):
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34 if not os.path.isdir(self.fs_endpoint_path):
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35 if self.config.get('ignore_missing_dir'):
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36 return False
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37 raise InvalidFileSystemEndpointError(self.name,
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38 self.fs_endpoint_path)
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39 return True
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40
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41 def openItem(self, item, mode='r'):
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42 for m in 'wxa+':
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43 if m in mode:
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44 # If opening the file for writing, let's make sure the
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45 # directory exists.
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46 dirname = os.path.dirname(item.spec)
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47 if not os.path.exists(dirname):
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48 os.makedirs(dirname, 0o755)
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49 break
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50 return open(item.spec, mode)
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51
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52 def getItemMtime(self, item):
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53 return os.path.getmtime(item.spec)
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54
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55
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56 class FSContentSource(FSContentSourceBase):
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57 """ Implements a `ContentSource` that simply returns files on disk
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58 under a given root directory.
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59 """
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60 SOURCE_NAME = 'fs'
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61
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62 def getContents(self, group):
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63 logger.debug("Scanning for content in: %s" % self.fs_endpoint_path)
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64 if not self._checkFSEndpoint():
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65 return None
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66
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67 parent_path = self.fs_endpoint_path
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68 if group is not None:
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69 parent_path = group.spec
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70
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71 names = filter(_filter_crap_files, osutil.listdir(parent_path))
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72 if self._fs_filter is not None:
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73 names = filter(self._fs_filter, names)
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74
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75 items = []
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76 groups = []
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77 for name in names:
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78 path = os.path.join(parent_path, name)
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79 if os.path.isdir(path):
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80 metadata = self._createGroupMetadata(path)
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81 groups.append(ContentGroup(path, metadata))
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82 else:
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83 metadata = self._createItemMetadata(path)
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84 items.append(ContentItem(path, metadata))
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85 self._finalizeContent(group, items, groups)
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86 return items + groups
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87
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88 def _createGroupMetadata(self, path):
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89 return {}
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90
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91 def _createItemMetadata(self, path):
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92 return {}
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93
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94 def _finalizeContent(self, parent_group, items, groups):
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95 pass
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96
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97 def getRelatedContents(self, item, relationship):
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98 return None
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99
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100 def findContent(self, route_params):
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101 rel_path = route_params['path']
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102 path = os.path.join(self.fs_endpoint_path, rel_path)
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103 metadata = self._createItemMetadata(path)
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104 return ContentItem(path, metadata)
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105
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106 def getSupportedRouteParameters(self):
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107 return [
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108 RouteParameter('path', RouteParameter.TYPE_PATH)]
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109
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110 def describe(self):
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111 return {'endpoint_path': self.fs_endpoint_path}