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annotate piecrust/pipelines/_pagebaker.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 08e02c2a2a1a
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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 queue
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3 import logging
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4 import threading
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5 import urllib.parse
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6 from piecrust.pipelines._pagerecords import SubPagePipelineRecordEntry
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7 from piecrust.rendering import RenderingContext, render_page, PASS_FORMATTING
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8 from piecrust.uriutil import split_uri
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9
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10
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11 logger = logging.getLogger(__name__)
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12
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13
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14 class BakingError(Exception):
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15 pass
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16
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17
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18 class PageBaker(object):
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19 def __init__(self, app, out_dir, force=False, copy_assets=True):
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20 self.app = app
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21 self.out_dir = out_dir
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22 self.force = force
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23 self.copy_assets = copy_assets
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24 self.site_root = app.config.get('site/root')
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25 self.pretty_urls = app.config.get('site/pretty_urls')
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26 self._writer_queue = None
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27 self._writer = None
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28
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29 def startWriterQueue(self):
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30 self._writer_queue = queue.Queue()
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31 self._writer = threading.Thread(
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32 name='PageSerializer',
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33 target=_text_writer,
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34 args=(self._writer_queue,))
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35 self._writer.start()
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36
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37 def stopWriterQueue(self):
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38 self._writer_queue.put_nowait(None)
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39 self._writer.join()
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40
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41 def getOutputPath(self, uri, pretty_urls):
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42 uri_root, uri_path = split_uri(self.app, uri)
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43
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44 bake_path = [self.out_dir]
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45 decoded_uri = urllib.parse.unquote(uri_path)
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46 if pretty_urls:
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47 bake_path.append(decoded_uri)
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48 bake_path.append('index.html')
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49 elif decoded_uri == '':
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50 bake_path.append('index.html')
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51 else:
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52 bake_path.append(decoded_uri)
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53
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54 return os.path.normpath(os.path.join(*bake_path))
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55
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56 def bake(self, qualified_page, prev_entry, dirty_source_names):
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57 # Start baking the sub-pages.
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58 cur_sub = 1
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59 has_more_subs = True
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60 sub_entries = []
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61 pretty_urls = qualified_page.config.get(
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62 'pretty_urls', self.pretty_urls)
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63
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64 while has_more_subs:
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65 sub_page = qualified_page.getSubPage(cur_sub)
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66 sub_uri = sub_page.uri
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67 logger.debug("Baking '%s' [%d]..." % (sub_uri, cur_sub))
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68
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69 out_path = self.getOutputPath(sub_uri, pretty_urls)
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70
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71 # Create the sub-entry for the bake record.
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72 sub_entry = SubPagePipelineRecordEntry(sub_uri, out_path)
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73 sub_entries.append(sub_entry)
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74
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75 # Find a corresponding sub-entry in the previous bake record.
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76 prev_sub_entry = None
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77 if prev_entry is not None:
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78 try:
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79 prev_sub_entry = prev_entry.getSub(cur_sub)
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80 except IndexError:
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81 pass
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82
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83 # Figure out if we need to invalidate or force anything.
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84 force_this_sub, invalidate_formatting = _compute_force_flags(
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85 prev_sub_entry, sub_entry, dirty_source_names)
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86 force_this_sub = force_this_sub or self.force
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87
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88 # Check for up-to-date outputs.
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89 do_bake = True
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90 if not force_this_sub:
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91 try:
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92 in_path_time = qualified_page.path_mtime
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93 out_path_time = os.path.getmtime(out_path)
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94 if out_path_time >= in_path_time:
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95 do_bake = False
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96 except OSError:
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97 # File doesn't exist, we'll need to bake.
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98 pass
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99
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100 # If this page didn't bake because it's already up-to-date.
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101 # Keep trying for as many subs as we know this page has.
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102 if not do_bake:
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103 sub_entry.render_info = prev_sub_entry.copyRenderInfo()
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104 sub_entry.flags = SubPagePipelineRecordEntry.FLAG_NONE
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105
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106 if prev_entry.num_subs >= cur_sub + 1:
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107 cur_sub += 1
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108 has_more_subs = True
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109 logger.debug(" %s is up to date, skipping to next "
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110 "sub-page." % out_path)
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111 continue
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112
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113 logger.debug(" %s is up to date, skipping bake." % out_path)
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114 break
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115
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116 # All good, proceed.
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117 try:
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118 if invalidate_formatting:
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119 cache_key = sub_uri
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parents:
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120 self.app.env.rendered_segments_repository.invalidate(
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
121 cache_key)
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
122 sub_entry.flags |= \
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parents:
diff changeset
123 SubPagePipelineRecordEntry.FLAG_FORMATTING_INVALIDATED
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parents:
diff changeset
124
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
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parents:
diff changeset
125 logger.debug(" p%d -> %s" % (cur_sub, out_path))
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
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parents:
diff changeset
126 rp = self._bakeSingle(qualified_page, cur_sub, out_path)
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
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parents:
diff changeset
127 except Exception as ex:
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
128 logger.exception(ex)
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
129 page_rel_path = os.path.relpath(qualified_page.path,
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
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parents:
diff changeset
130 self.app.root_dir)
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parents:
diff changeset
131 raise BakingError("%s: error baking '%s'." %
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parents:
diff changeset
132 (page_rel_path, sub_uri)) from ex
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parents:
diff changeset
133
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parents:
diff changeset
134 # Record what we did.
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parents:
diff changeset
135 sub_entry.flags |= SubPagePipelineRecordEntry.FLAG_BAKED
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
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parents:
diff changeset
136 sub_entry.render_info = rp.copyRenderInfo()
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
137
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
138 # Copy page assets.
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
139 if (cur_sub == 1 and self.copy_assets and
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
140 sub_entry.anyPass(lambda p: p.used_assets)):
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
141 if pretty_urls:
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
142 out_assets_dir = os.path.dirname(out_path)
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
143 else:
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parents:
diff changeset
144 out_assets_dir, out_name = os.path.split(out_path)
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parents:
diff changeset
145 if sub_uri != self.site_root:
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parents:
diff changeset
146 out_name_noext, _ = os.path.splitext(out_name)
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parents:
diff changeset
147 out_assets_dir = os.path.join(out_assets_dir,
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parents:
diff changeset
148 out_name_noext)
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parents:
diff changeset
149
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parents:
diff changeset
150 logger.debug("Copying page assets to: %s" % out_assets_dir)
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parents:
diff changeset
151 _ensure_dir_exists(out_assets_dir)
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parents:
diff changeset
152
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parents:
diff changeset
153 qualified_page.source.buildAssetor(qualified_page, sub_uri).copyAssets(out_assets_dir)
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
154
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
155 # Figure out if we have more work.
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
156 has_more_subs = False
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parents:
diff changeset
157 if sub_entry.anyPass(lambda p: p.pagination_has_more):
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
158 cur_sub += 1
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
159 has_more_subs = True
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parents:
diff changeset
160
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
161 return sub_entries
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parents:
diff changeset
162
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
163 def _bakeSingle(self, qp, out_path):
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
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parents:
diff changeset
164 ctx = RenderingContext(qp)
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parents:
diff changeset
165 qp.source.prepareRenderContext(ctx)
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parents:
diff changeset
166
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
167 with self.app.env.timerScope("PageRender"):
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
168 rp = render_page(ctx)
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parents:
diff changeset
169
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
170 with self.app.env.timerScope("PageSerialize"):
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
171 if self._writer_queue is not None:
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
172 self._writer_queue.put_nowait((out_path, rp.content))
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
173 else:
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
174 with open(out_path, 'w', encoding='utf8') as fp:
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
175 fp.write(rp.content)
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
176
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
177 return rp
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
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parents:
diff changeset
178
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
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parents:
diff changeset
179
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
180 def _text_writer(q):
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
181 while True:
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
182 item = q.get()
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
183 if item is not None:
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
184 out_path, txt = item
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
185 out_dir = os.path.dirname(out_path)
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
186 _ensure_dir_exists(out_dir)
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
187
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
188 with open(out_path, 'w', encoding='utf8') as fp:
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
189 fp.write(txt)
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
190
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
191 q.task_done()
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
192 else:
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
193 # Sentinel object, terminate the thread.
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
194 q.task_done()
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
195 break
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
196
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
197
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
198 def _compute_force_flags(prev_sub_entry, sub_entry, dirty_source_names):
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
199 # Figure out what to do with this page.
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
200 force_this_sub = False
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
201 invalidate_formatting = False
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
202 sub_uri = sub_entry.out_uri
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
203 if (prev_sub_entry and
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
204 (prev_sub_entry.was_baked_successfully or
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
205 prev_sub_entry.was_clean)):
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
206 # If the current page is known to use pages from other sources,
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
207 # see if any of those got baked, or are going to be baked for
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
208 # some reason. If so, we need to bake this one too.
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
209 # (this happens for instance with the main page of a blog).
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
210 dirty_for_this, invalidated_render_passes = (
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
211 _get_dirty_source_names_and_render_passes(
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
212 prev_sub_entry, dirty_source_names))
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
213 if len(invalidated_render_passes) > 0:
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
214 logger.debug(
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
215 "'%s' is known to use sources %s, which have "
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
216 "items that got (re)baked. Will force bake this "
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
217 "page. " % (sub_uri, dirty_for_this))
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
218 sub_entry.flags |= \
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
219 SubPagePipelineRecordEntry.FLAG_FORCED_BY_SOURCE
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
220 force_this_sub = True
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
221
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
222 if PASS_FORMATTING in invalidated_render_passes:
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
223 logger.debug(
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
224 "Will invalidate cached formatting for '%s' "
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
225 "since sources were using during that pass."
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
226 % sub_uri)
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
227 invalidate_formatting = True
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
228 elif (prev_sub_entry and
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
229 prev_sub_entry.errors):
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
230 # Previous bake failed. We'll have to bake it again.
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
231 logger.debug(
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
232 "Previous record entry indicates baking failed for "
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
233 "'%s'. Will bake it again." % sub_uri)
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
234 sub_entry.flags |= \
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
235 SubPagePipelineRecordEntry.FLAG_FORCED_BY_PREVIOUS_ERRORS
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
236 force_this_sub = True
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
237 elif not prev_sub_entry:
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
238 # No previous record. We'll have to bake it.
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
239 logger.debug("No previous record entry found for '%s'. Will "
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
240 "force bake it." % sub_uri)
4850f8c21b6e core: Start of the big refactor for PieCrust 3.0.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
241 sub_entry.flags |= \
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242 SubPagePipelineRecordEntry.FLAG_FORCED_BY_NO_PREVIOUS
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243 force_this_sub = True
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244
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245 return force_this_sub, invalidate_formatting
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246
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247
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248 def _get_dirty_source_names_and_render_passes(sub_entry, dirty_source_names):
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249 dirty_for_this = set()
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250 invalidated_render_passes = set()
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251 for p, pinfo in enumerate(sub_entry.render_info):
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252 if pinfo:
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253 for src_name in pinfo.used_source_names:
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254 is_dirty = (src_name in dirty_source_names)
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255 if is_dirty:
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256 invalidated_render_passes.add(p)
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257 dirty_for_this.add(src_name)
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258 break
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259 return dirty_for_this, invalidated_render_passes
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260
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261
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262 def _ensure_dir_exists(path):
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263 try:
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264 os.makedirs(path, mode=0o755, exist_ok=True)
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265 except OSError:
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266 # In a multiprocess environment, several process may very
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267 # occasionally try to create the same directory at the same time.
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268 # Let's ignore any error and if something's really wrong (like file
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269 # acces permissions or whatever), then it will more legitimately fail
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270 # just after this when we try to write files.
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271 pass
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272