author | Denis Laxalde <denis.laxalde@logilab.fr> |
Fri, 12 Jun 2015 09:18:02 +0200 | |
changeset 10375 | 28ec01db78b3 |
parent 9368 | 10694dd136f3 |
child 10589 | 7c23b7de2b8d |
permissions | -rw-r--r-- |
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# copyright 2013 LOGILAB S.A. (Paris, FRANCE), all rights reserved. |
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# contact http://www.logilab.fr -- mailto:contact@logilab.fr |
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# |
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# This program is free software: you can redistribute it and/or modify it under |
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# the terms of the GNU Lesser General Public License as published by the Free |
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# Software Foundation, either version 2.1 of the License, or (at your option) |
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# any later version. |
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# |
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# This program is distributed in the hope that it will be useful, but WITHOUT |
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS |
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# FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more |
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# details. |
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# |
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# You should have received a copy of the GNU Lesser General Public License along |
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# with this program. If not, see <http://www.gnu.org/licenses/>. |
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"""Instrumentation utilities""" |
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|
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import os |
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|
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try: |
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import pygraphviz |
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except ImportError: |
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pygraphviz = None |
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|
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from cubicweb.cwvreg import CWRegistryStore |
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from cubicweb.devtools.devctl import DevConfiguration |
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|
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|
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ALL_COLORS = [ |
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"00FF00", "0000FF", "FFFF00", "FF00FF", "00FFFF", "000000", |
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"800000", "008000", "000080", "808000", "800080", "008080", "808080", |
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"C00000", "00C000", "0000C0", "C0C000", "C000C0", "00C0C0", "C0C0C0", |
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"400000", "004000", "000040", "404000", "400040", "004040", "404040", |
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"200000", "002000", "000020", "202000", "200020", "002020", "202020", |
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"600000", "006000", "000060", "606000", "600060", "006060", "606060", |
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"A00000", "00A000", "0000A0", "A0A000", "A000A0", "00A0A0", "A0A0A0", |
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"E00000", "00E000", "0000E0", "E0E000", "E000E0", "00E0E0", "E0E0E0", |
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] |
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_COLORS = {} |
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def get_color(key): |
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try: |
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return _COLORS[key] |
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except KeyError: |
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_COLORS[key] = '#'+ALL_COLORS[len(_COLORS) % len(ALL_COLORS)] |
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return _COLORS[key] |
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def warn(msg, *args): |
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print 'WARNING: %s' % (msg % args) |
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def info(msg): |
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print 'INFO: ' + msg |
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class PropagationAnalyzer(object): |
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"""Abstract propagation analyzer, providing utility function to extract |
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entities involved in propagation from a schema, as well as propagation |
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rules from hooks (provided they use intrumentalized sets, see |
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:class:`CubeTracerSet`). |
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Concrete classes should at least define `prop_rel` class attribute and |
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implements the `is_root` method. |
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See `localperms` or `nosylist` cubes for example usage (`ccplugin` module). |
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""" |
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prop_rel = None # name of the propagation relation |
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def init(self, cube): |
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"""Initialize analyze for the given cube, returning the (already loaded) |
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vregistry and a set of entities which we're interested in. |
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""" |
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config = DevConfiguration(cube) |
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schema = config.load_schema() |
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vreg = CWRegistryStore(config) |
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vreg.set_schema(schema) # set_schema triggers objects registrations |
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eschemas = set(eschema for eschema in schema.entities() |
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if self.should_include(eschema)) |
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return vreg, eschemas |
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def is_root(self, eschema): |
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"""Return `True` if given entity schema is a root of the graph""" |
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raise NotImplementedError() |
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def should_include(self, eschema): |
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"""Return `True` if given entity schema should be included by the graph. |
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""" |
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if self.prop_rel in eschema.subjrels or self.is_root(eschema): |
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return True |
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return False |
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def prop_edges(self, s_rels, o_rels, eschemas): |
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"""Return a set of edges where propagation has been detected. |
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Each edge is defined by a 4-uple (from node, to node, rtype, package) |
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where `rtype` is the relation type bringing from <from node> to <to |
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node> and `package` is the cube adding the rule to the propagation |
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control set (see see :class:`CubeTracerSet`). |
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""" |
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schema = iter(eschemas).next().schema |
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prop_edges = set() |
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for rtype in s_rels: |
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found = False |
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for subj, obj in schema.rschema(rtype).rdefs: |
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104 |
if subj in eschemas and obj in eschemas: |
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105 |
found = True |
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106 |
prop_edges.add( (subj, obj, rtype, s_rels.value_cube[rtype]) ) |
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107 |
if not found: |
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108 |
warn('no rdef match for %s', rtype) |
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109 |
for rtype in o_rels: |
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110 |
found = False |
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111 |
for subj, obj in schema.rschema(rtype).rdefs: |
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112 |
if subj in eschemas and obj in eschemas: |
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113 |
found = True |
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114 |
prop_edges.add( (obj, subj, rtype, o_rels.value_cube[rtype]) ) |
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115 |
if not found: |
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116 |
warn('no rdef match for %s', rtype) |
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117 |
return prop_edges |
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118 |
|
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119 |
def detect_problems(self, eschemas, edges): |
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120 |
"""Given the set of analyzed entity schemas and edges between them, |
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121 |
return a set of entity schemas where a problem has been detected. |
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122 |
""" |
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123 |
problematic = set() |
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124 |
for eschema in eschemas: |
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125 |
if self.has_problem(eschema, edges): |
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126 |
problematic.add(eschema) |
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127 |
not_problematic = set(eschemas).difference(problematic) |
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128 |
if not_problematic: |
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129 |
info('nothing problematic in: %s' % |
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130 |
', '.join(e.type for e in not_problematic)) |
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131 |
return problematic |
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132 |
|
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133 |
def has_problem(self, eschema, edges): |
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134 |
"""Return `True` if the given schema is considered problematic, |
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135 |
considering base propagation rules. |
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136 |
""" |
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137 |
root = self.is_root(eschema) |
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138 |
has_prop_rel = self.prop_rel in eschema.subjrels |
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139 |
# root but no propagation relation |
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140 |
if root and not has_prop_rel: |
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141 |
warn('%s is root but miss %s', eschema, self.prop_rel) |
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142 |
return True |
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143 |
# propagated but without propagation relation / not propagated but |
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144 |
# with propagation relation |
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145 |
if not has_prop_rel and \ |
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146 |
any(edge for edge in edges if edge[1] == eschema): |
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147 |
warn("%s miss %s but is reached by propagation", |
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148 |
eschema, self.prop_rel) |
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149 |
return True |
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150 |
elif has_prop_rel and not root: |
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151 |
rdef = eschema.rdef(self.prop_rel, takefirst=True) |
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152 |
edges = [edge for edge in edges if edge[1] == eschema] |
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153 |
if not edges: |
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154 |
warn("%s has %s but isn't reached by " |
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155 |
"propagation", eschema, self.prop_rel) |
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156 |
return True |
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157 |
# require_permission relation / propagation rule not added by |
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158 |
# the same cube |
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159 |
elif not any(edge for edge in edges if edge[-1] == rdef.package): |
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160 |
warn('%s has %s relation / propagation rule' |
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161 |
' not added by the same cube (%s / %s)', eschema, |
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162 |
self.prop_rel, rdef.package, edges[0][-1]) |
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163 |
return True |
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164 |
return False |
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165 |
|
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166 |
def init_graph(self, eschemas, edges, problematic): |
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167 |
"""Initialize and return graph, adding given nodes (entity schemas) and |
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168 |
edges between them. |
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169 |
|
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170 |
Require pygraphviz installed. |
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171 |
""" |
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172 |
if pygraphviz is None: |
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173 |
raise RuntimeError('pygraphviz is not installed') |
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174 |
graph = pygraphviz.AGraph(strict=False, directed=True) |
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175 |
for eschema in eschemas: |
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176 |
if eschema in problematic: |
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177 |
params = {'color': '#ff0000', 'fontcolor': '#ff0000'} |
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178 |
else: |
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179 |
params = {}#'color': get_color(eschema.package)} |
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180 |
graph.add_node(eschema.type, **params) |
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181 |
for subj, obj, rtype, package in edges: |
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182 |
graph.add_edge(str(subj), str(obj), label=rtype, |
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183 |
color=get_color(package)) |
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184 |
return graph |
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185 |
|
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186 |
def add_colors_legend(self, graph): |
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187 |
"""Add a legend of used colors to the graph.""" |
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188 |
for package, color in sorted(_COLORS.iteritems()): |
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189 |
graph.add_node(package, color=color, fontcolor=color, shape='record') |
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190 |
|
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191 |
|
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192 |
class CubeTracerSet(object): |
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193 |
"""Dumb set implementation whose purpose is to keep track of which cube is |
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194 |
being loaded when something is added to the set. |
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195 |
|
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196 |
Results will be found in the `value_cube` attribute dictionary. |
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197 |
|
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198 |
See `localperms` or `nosylist` cubes for example usage (`hooks` module). |
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199 |
""" |
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200 |
def __init__(self, vreg, wrapped): |
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201 |
self.vreg = vreg |
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202 |
self.wrapped = wrapped |
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203 |
self.value_cube = {} |
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204 |
|
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205 |
def add(self, value): |
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206 |
self.wrapped.add(value) |
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207 |
cube = self.vreg.currently_loading_cube |
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208 |
if value in self.value_cube: |
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warn('%s is propagated by cube %s and cube %s', |
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value, self.value_cube[value], cube) |
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else: |
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self.value_cube[value] = cube |
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def __iter__(self): |
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return iter(self.wrapped) |
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def __ior__(self, other): |
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for value in other: |
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self.add(value) |
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return self |
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def __ror__(self, other): |
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other |= self.wrapped |
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return other |