Mercurial > kallithea

annotate pylons_app/lib/indexers/__init__.py @ 497:fb0c3af6031b celery

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Implemented locking for task, to prevent for running the same tasks, moved out pidlock library. Added dirsize display
author Marcin Kuzminski <marcin@python-works.com>
date Thu, 23 Sep 2010 01:08:33 +0200
parents 149940ba96d9
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 from os.path import dirname as dn, join as jn
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2 from pylons_app.config.environment import load_environment
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3 from pylons_app.model.hg_model import HgModel
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4 from shutil import rmtree
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5 from webhelpers.html.builder import escape
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6 from vcs.utils.lazy import LazyProperty
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7
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8 from whoosh.analysis import RegexTokenizer, LowercaseFilter, StopFilter
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9 from whoosh.fields import TEXT, ID, STORED, Schema, FieldType
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10 from whoosh.index import create_in, open_dir
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11 from whoosh.formats import Characters
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12 from whoosh.highlight import highlight, SimpleFragmenter, HtmlFormatter
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13
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14 import os
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15 import sys
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16 import traceback
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17
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18 #to get the pylons_app import
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19 sys.path.append(dn(dn(dn(os.path.realpath(__file__)))))
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20
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21
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22 #LOCATION WE KEEP THE INDEX
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23 IDX_LOCATION = jn(dn(dn(dn(dn(os.path.abspath(__file__))))), 'data', 'index')
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24
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25 #EXTENSIONS WE WANT TO INDEX CONTENT OFF
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26 INDEX_EXTENSIONS = ['action', 'adp', 'ashx', 'asmx', 'aspx', 'asx', 'axd', 'c',
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27 'cfg', 'cfm', 'cpp', 'cs', 'css', 'diff', 'do', 'el', 'erl',
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28 'h', 'htm', 'html', 'ini', 'java', 'js', 'jsp', 'jspx', 'lisp',
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29 'lua', 'm', 'mako', 'ml', 'pas', 'patch', 'php', 'php3',
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30 'php4', 'phtml', 'pm', 'py', 'rb', 'rst', 's', 'sh', 'sql',
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31 'tpl', 'txt', 'vim', 'wss', 'xhtml', 'xml', 'xsl', 'xslt',
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32 'yaws']
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33
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34 #CUSTOM ANALYZER wordsplit + lowercase filter
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35 ANALYZER = RegexTokenizer(expression=r"\w+") | LowercaseFilter()
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36
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37
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38 #INDEX SCHEMA DEFINITION
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39 SCHEMA = Schema(owner=TEXT(),
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40 repository=TEXT(stored=True),
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41 path=ID(stored=True, unique=True),
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42 content=FieldType(format=Characters(ANALYZER),
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43 scorable=True, stored=True),
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44 modtime=STORED(), extension=TEXT(stored=True))
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47 IDX_NAME = 'HG_INDEX'
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48 FORMATTER = HtmlFormatter('span', between='\n<span class="break">...</span>\n')
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49 FRAGMENTER = SimpleFragmenter(200)
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50
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51 class ResultWrapper(object):
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52 def __init__(self, searcher, matcher, highlight_items):
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53 self.searcher = searcher
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54 self.matcher = matcher
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55 self.highlight_items = highlight_items
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56 self.fragment_size = 200 / 2
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57
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58 @LazyProperty
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59 def doc_ids(self):
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60 docs_id = []
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61 while self.matcher.is_active():
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62 docnum = self.matcher.id()
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63 chunks = [offsets for offsets in self.get_chunks()]
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64 docs_id.append([docnum, chunks])
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65 self.matcher.next()
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66 return docs_id
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67
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68 def __str__(self):
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69 return '<%s at %s>' % (self.__class__.__name__, len(self.doc_ids))
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70
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71 def __repr__(self):
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72 return self.__str__()
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73
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74 def __len__(self):
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75 return len(self.doc_ids)
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76
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77 def __iter__(self):
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78 """
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79 Allows Iteration over results,and lazy generate content
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80
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81 *Requires* implementation of ``__getitem__`` method.
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82 """
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83 for docid in self.doc_ids:
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84 yield self.get_full_content(docid)
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85
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86 def __getslice__(self, i, j):
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87 """
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88 Slicing of resultWrapper
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89 """
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90 slice = []
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91 for docid in self.doc_ids[i:j]:
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92 slice.append(self.get_full_content(docid))
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93 return slice
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94
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95
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96 def get_full_content(self, docid):
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97 res = self.searcher.stored_fields(docid[0])
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98 f_path = res['path'][res['path'].find(res['repository']) \
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99 + len(res['repository']):].lstrip('/')
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100
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101 content_short = self.get_short_content(res, docid[1])
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102 res.update({'content_short':content_short,
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103 'content_short_hl':self.highlight(content_short),
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104 'f_path':f_path})
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105
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106 return res
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107
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108 def get_short_content(self, res, chunks):
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109
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110 return ''.join([res['content'][chunk[0]:chunk[1]] for chunk in chunks])
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111
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112 def get_chunks(self):
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113 """
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114 Smart function that implements chunking the content
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115 but not overlap chunks so it doesn't highlight the same
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116 close occurences twice.
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117 @param matcher:
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118 @param size:
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119 """
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120 memory = [(0, 0)]
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121 for span in self.matcher.spans():
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122 start = span.startchar or 0
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123 end = span.endchar or 0
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124 start_offseted = max(0, start - self.fragment_size)
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125 end_offseted = end + self.fragment_size
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126
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127 if start_offseted < memory[-1][1]:
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128 start_offseted = memory[-1][1]
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129 memory.append((start_offseted, end_offseted,))
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130 yield (start_offseted, end_offseted,)
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131
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132 def highlight(self, content, top=5):
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133 hl = highlight(escape(content),
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134 self.highlight_items,
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135 analyzer=ANALYZER,
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136 fragmenter=FRAGMENTER,
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137 formatter=FORMATTER,
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138 top=top)
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139 return hl