Mercurial > piecrust2
annotate piecrust/sources/mixins.py @ 852:4850f8c21b6e
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> |
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date | Wed, 17 May 2017 00:11:48 -0700 |
parents | ab5c6a8ae90a |
children | f070a4fc033c |
rev | line source |
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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.data.paginationdata import PaginationData |
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5 from piecrust.sources.base import ContentItem |
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6 from piecrust.sources.interfaces import IPaginationSource |
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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 assets_suffix = '-assets' |
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12 |
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13 |
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14 class ContentSourceIterator(object): |
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15 def __init__(self, source): |
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16 self.source = source |
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17 |
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18 # This is to permit recursive traversal of the |
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19 # iterator chain. It acts as the end. |
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20 self.it = None |
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21 |
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22 def __iter__(self): |
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23 return self.source.getAllContentItems() |
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24 |
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25 |
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26 class DateSortIterator(object): |
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27 def __init__(self, it, reverse=True): |
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28 self.it = it |
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29 self.reverse = reverse |
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30 |
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31 def __iter__(self): |
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32 return iter(sorted(self.it, |
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33 key=lambda x: x.datetime, reverse=self.reverse)) |
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34 |
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35 |
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36 class PaginationDataBuilderIterator(object): |
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37 def __init__(self, it): |
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38 self.it = it |
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39 |
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40 def __iter__(self): |
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41 for page in self.it: |
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42 if page is not None: |
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43 yield PaginationData(page) |
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44 else: |
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45 yield None |
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46 |
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47 |
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48 class SimplePaginationSourceMixin(IPaginationSource): |
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49 """ Implements the `IPaginationSource` interface in a standard way that |
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50 should fit most page sources. |
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51 """ |
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52 def getItemsPerPage(self): |
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53 return self.config['items_per_page'] |
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54 |
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55 def getSourceIterator(self): |
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56 return ContentSourceIterator(self) |
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57 |
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58 def getSorterIterator(self, it): |
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59 return DateSortIterator(it) |
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60 |
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61 def getTailIterator(self, it): |
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62 return PaginationDataBuilderIterator(it) |
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63 |
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64 |
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65 class SimpleAssetsSubDirMixin: |
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66 def _getRelatedAssetsContents(self, item, relationship): |
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67 if not item.metadata.get('__has_assets', False): |
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68 return None |
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69 |
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70 assets = {} |
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71 assets_dir = item.spec + assets_suffix |
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72 for f in osutil.listdir(assets_dir): |
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73 fpath = os.path.join(assets_dir, f) |
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74 name, _ = os.path.splitext(f) |
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75 if name in assets: |
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76 raise Exception("Multiple assets are named '%s'." % |
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77 name) |
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78 assets[name] = ContentItem(fpath, {'__is_asset': True}) |
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79 return assets |
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80 |
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81 def _onFinalizeContent(self, parent_group, items, groups): |
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82 assetsGroups = [] |
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83 for g in groups: |
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84 if not g.spec.endswith(assets_suffix): |
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85 continue |
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86 match = g.spec[:-len(assets_suffix)] |
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87 item = next(filter(lambda i: i.spec == match), None) |
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88 if item: |
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89 item.metadata['__has_assets'] = True |
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90 assetsGroups.append(g) |
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91 for g in assetsGroups: |
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92 groups.remove(g) |
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93 |