Mercurial > kallithea
annotate pylons_app/lib/indexers/__init__.py @ 496:47f4c7ff245b celery
added mimetypes to annotate
author | Marcin Kuzminski <marcin@python-works.com> |
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date | Wed, 22 Sep 2010 16:26:49 +0200 |
parents | 149940ba96d9 |
children | fb0c3af6031b |
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1 from os.path import dirname as dn, join as jn |
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2 from pidlock import LockHeld, DaemonLock |
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3 from pylons_app.config.environment import load_environment |
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4 from pylons_app.model.hg_model import HgModel |
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5 from shutil import rmtree |
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6 from webhelpers.html.builder import escape |
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7 from vcs.utils.lazy import LazyProperty |
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8 |
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9 from whoosh.analysis import RegexTokenizer, LowercaseFilter, StopFilter |
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10 from whoosh.fields import TEXT, ID, STORED, Schema, FieldType |
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11 from whoosh.index import create_in, open_dir |
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12 from whoosh.formats import Characters |
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13 from whoosh.highlight import highlight, SimpleFragmenter, HtmlFormatter |
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14 |
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15 import os |
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16 import sys |
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17 import traceback |
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18 |
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19 #to get the pylons_app import |
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20 sys.path.append(dn(dn(dn(os.path.realpath(__file__))))) |
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21 |
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22 |
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23 #LOCATION WE KEEP THE INDEX |
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24 IDX_LOCATION = jn(dn(dn(dn(dn(os.path.abspath(__file__))))), 'data', 'index') |
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25 |
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26 #EXTENSIONS WE WANT TO INDEX CONTENT OFF |
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27 INDEX_EXTENSIONS = ['action', 'adp', 'ashx', 'asmx', 'aspx', 'asx', 'axd', 'c', |
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28 'cfg', 'cfm', 'cpp', 'cs', 'css', 'diff', 'do', 'el', 'erl', |
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29 'h', 'htm', 'html', 'ini', 'java', 'js', 'jsp', 'jspx', 'lisp', |
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30 'lua', 'm', 'mako', 'ml', 'pas', 'patch', 'php', 'php3', |
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31 'php4', 'phtml', 'pm', 'py', 'rb', 'rst', 's', 'sh', 'sql', |
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32 'tpl', 'txt', 'vim', 'wss', 'xhtml', 'xml', 'xsl', 'xslt', |
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33 'yaws'] |
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34 |
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35 #CUSTOM ANALYZER wordsplit + lowercase filter |
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36 ANALYZER = RegexTokenizer(expression=r"\w+") | LowercaseFilter() |
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37 |
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38 |
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39 #INDEX SCHEMA DEFINITION |
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40 SCHEMA = Schema(owner=TEXT(), |
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41 repository=TEXT(stored=True), |
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42 path=ID(stored=True, unique=True), |
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43 content=FieldType(format=Characters(ANALYZER), |
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44 scorable=True, stored=True), |
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45 modtime=STORED(), extension=TEXT(stored=True)) |
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46 |
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47 |
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48 IDX_NAME = 'HG_INDEX' |
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49 FORMATTER = HtmlFormatter('span', between='\n<span class="break">...</span>\n') |
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50 FRAGMENTER = SimpleFragmenter(200) |
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51 |
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52 class ResultWrapper(object): |
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53 def __init__(self, searcher, matcher, highlight_items): |
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54 self.searcher = searcher |
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55 self.matcher = matcher |
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56 self.highlight_items = highlight_items |
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57 self.fragment_size = 200 / 2 |
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58 |
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59 @LazyProperty |
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60 def doc_ids(self): |
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61 docs_id = [] |
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62 while self.matcher.is_active(): |
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63 docnum = self.matcher.id() |
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64 chunks = [offsets for offsets in self.get_chunks()] |
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65 docs_id.append([docnum, chunks]) |
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66 self.matcher.next() |
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67 return docs_id |
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68 |
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69 def __str__(self): |
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70 return '<%s at %s>' % (self.__class__.__name__, len(self.doc_ids)) |
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71 |
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72 def __repr__(self): |
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73 return self.__str__() |
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74 |
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75 def __len__(self): |
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76 return len(self.doc_ids) |
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77 |
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78 def __iter__(self): |
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79 """ |
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80 Allows Iteration over results,and lazy generate content |
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81 |
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82 *Requires* implementation of ``__getitem__`` method. |
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83 """ |
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84 for docid in self.doc_ids: |
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85 yield self.get_full_content(docid) |
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86 |
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87 def __getslice__(self, i, j): |
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88 """ |
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89 Slicing of resultWrapper |
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90 """ |
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91 slice = [] |
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92 for docid in self.doc_ids[i:j]: |
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93 slice.append(self.get_full_content(docid)) |
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94 return slice |
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95 |
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96 |
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97 def get_full_content(self, docid): |
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98 res = self.searcher.stored_fields(docid[0]) |
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99 f_path = res['path'][res['path'].find(res['repository']) \ |
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100 + len(res['repository']):].lstrip('/') |
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101 |
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102 content_short = self.get_short_content(res, docid[1]) |
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103 res.update({'content_short':content_short, |
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104 'content_short_hl':self.highlight(content_short), |
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105 'f_path':f_path}) |
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106 |
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107 return res |
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108 |
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109 def get_short_content(self, res, chunks): |
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110 |
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111 return ''.join([res['content'][chunk[0]:chunk[1]] for chunk in chunks]) |
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112 |
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113 def get_chunks(self): |
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114 """ |
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115 Smart function that implements chunking the content |
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116 but not overlap chunks so it doesn't highlight the same |
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117 close occurences twice. |
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118 @param matcher: |
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119 @param size: |
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120 """ |
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121 memory = [(0, 0)] |
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122 for span in self.matcher.spans(): |
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123 start = span.startchar or 0 |
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124 end = span.endchar or 0 |
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125 start_offseted = max(0, start - self.fragment_size) |
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126 end_offseted = end + self.fragment_size |
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127 |
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128 if start_offseted < memory[-1][1]: |
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129 start_offseted = memory[-1][1] |
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130 memory.append((start_offseted, end_offseted,)) |
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131 yield (start_offseted, end_offseted,) |
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132 |
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133 def highlight(self, content, top=5): |
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134 hl = highlight(escape(content), |
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135 self.highlight_items, |
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136 analyzer=ANALYZER, |
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137 fragmenter=FRAGMENTER, |
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138 formatter=FORMATTER, |
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139 top=top) |
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140 return hl |