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<h1>Source code for Bcfg2.Server.Plugins.Packages.PackagesSources</h1><div class="highlight"><pre>
<span class="sd">""" PackagesSources handles the</span>
<span class="sd">:ref:`server-plugins-generators-packages` ``sources.xml`` file"""</span>
<span class="kn">import</span> <span class="nn">os</span>
<span class="kn">import</span> <span class="nn">sys</span>
<span class="kn">import</span> <span class="nn">Bcfg2.Server.Plugin</span>
<span class="kn">from</span> <span class="nn">Bcfg2.Server.Plugins.Packages.Source</span> <span class="kn">import</span> <span class="n">SourceInitError</span>
<div class="viewcode-block" id="PackagesSources"><a class="viewcode-back" href="../../../../../development/packages.html#Bcfg2.Server.Plugins.Packages.PackagesSources.PackagesSources">[docs]</a><span class="k">class</span> <span class="nc">PackagesSources</span><span class="p">(</span><span class="n">Bcfg2</span><span class="o">.</span><span class="n">Server</span><span class="o">.</span><span class="n">Plugin</span><span class="o">.</span><span class="n">StructFile</span><span class="p">,</span>
<span class="n">Bcfg2</span><span class="o">.</span><span class="n">Server</span><span class="o">.</span><span class="n">Plugin</span><span class="o">.</span><span class="n">Debuggable</span><span class="p">):</span>
<span class="sd">""" PackagesSources handles parsing of the</span>
<span class="sd"> :mod:`Bcfg2.Server.Plugins.Packages` ``sources.xml`` file, and the</span>
<span class="sd"> creation of the appropriate</span>
<span class="sd"> :class:`Bcfg2.Server.Plugins.Packages.Source.Source` object for</span>
<span class="sd"> each ``Source`` tag. """</span>
<span class="n">__identifier__</span> <span class="o">=</span> <span class="bp">None</span>
<span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">filename</span><span class="p">,</span> <span class="n">cachepath</span><span class="p">,</span> <span class="n">fam</span><span class="p">,</span> <span class="n">packages</span><span class="p">,</span> <span class="n">setup</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> :param filename: The full path to ``sources.xml``</span>
<span class="sd"> :type filename: string</span>
<span class="sd"> :param cachepath: The full path to the directory where</span>
<span class="sd"> :class:`Bcfg2.Server.Plugins.Packages.Source.Source`</span>
<span class="sd"> data will be cached</span>
<span class="sd"> :type cachepath: string</span>
<span class="sd"> :param fam: The file access monitor to use to create watches</span>
<span class="sd"> on ``sources.xml`` and any XIncluded files.</span>
<span class="sd"> :type fam: Bcfg2.Server.FileMonitor.FileMonitor</span>
<span class="sd"> :param packages: The Packages plugin object ``sources.xml`` is</span>
<span class="sd"> being parsed on behalf of (i.e., the calling</span>
<span class="sd"> object)</span>
<span class="sd"> :type packages: Bcfg2.Server.Plugins.Packages.Packages</span>
<span class="sd"> :param setup: A Bcfg2 options dict</span>
<span class="sd"> :type setup: dict</span>
<span class="sd"> :raises: :class:`Bcfg2.Server.Plugin.exceptions.PluginInitError` -</span>
<span class="sd"> If ``sources.xml`` cannot be read</span>
<span class="sd"> """</span>
<span class="n">Bcfg2</span><span class="o">.</span><span class="n">Server</span><span class="o">.</span><span class="n">Plugin</span><span class="o">.</span><span class="n">Debuggable</span><span class="o">.</span><span class="n">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">Bcfg2</span><span class="o">.</span><span class="n">Server</span><span class="o">.</span><span class="n">Plugin</span><span class="o">.</span><span class="n">StructFile</span><span class="o">.</span><span class="n">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">filename</span><span class="p">,</span> <span class="n">fam</span><span class="o">=</span><span class="n">fam</span><span class="p">,</span>
<span class="n">should_monitor</span><span class="o">=</span><span class="bp">True</span><span class="p">)</span>
<span class="k">except</span> <span class="ne">OSError</span><span class="p">:</span>
<span class="n">err</span> <span class="o">=</span> <span class="n">sys</span><span class="o">.</span><span class="n">exc_info</span><span class="p">()[</span><span class="mi">1</span><span class="p">]</span>
<span class="n">msg</span> <span class="o">=</span> <span class="s">"Packages: Failed to read configuration file: </span><span class="si">%s</span><span class="s">"</span> <span class="o">%</span> <span class="n">err</span>
<span class="bp">self</span><span class="o">.</span><span class="n">logger</span><span class="o">.</span><span class="n">error</span><span class="p">(</span><span class="n">msg</span><span class="p">)</span>
<span class="k">raise</span> <span class="n">Bcfg2</span><span class="o">.</span><span class="n">Server</span><span class="o">.</span><span class="n">Plugin</span><span class="o">.</span><span class="n">PluginInitError</span><span class="p">(</span><span class="n">msg</span><span class="p">)</span>
<span class="c">#: The full path to the directory where</span>
<span class="c">#: :class:`Bcfg2.Server.Plugins.Packages.Source.Source` data</span>
<span class="c">#: will be cached</span>
<span class="bp">self</span><span class="o">.</span><span class="n">cachepath</span> <span class="o">=</span> <span class="n">cachepath</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">exists</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">cachepath</span><span class="p">):</span>
<span class="c"># create cache directory if needed</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">os</span><span class="o">.</span><span class="n">makedirs</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">cachepath</span><span class="p">)</span>
<span class="k">except</span> <span class="ne">OSError</span><span class="p">:</span>
<span class="n">err</span> <span class="o">=</span> <span class="n">sys</span><span class="o">.</span><span class="n">exc_info</span><span class="p">()[</span><span class="mi">1</span><span class="p">]</span>
<span class="bp">self</span><span class="o">.</span><span class="n">logger</span><span class="o">.</span><span class="n">error</span><span class="p">(</span><span class="s">"Could not create Packages cache at </span><span class="si">%s</span><span class="s">: </span><span class="si">%s</span><span class="s">"</span> <span class="o">%</span>
<span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">cachepath</span><span class="p">,</span> <span class="n">err</span><span class="p">))</span>
<span class="c">#: The Bcfg2 options dict</span>
<span class="bp">self</span><span class="o">.</span><span class="n">setup</span> <span class="o">=</span> <span class="n">setup</span>
<span class="c">#: The :class:`Bcfg2.Server.Plugins.Packages.Packages` that</span>
<span class="c">#: instantiated this ``PackagesSources`` object</span>
<span class="bp">self</span><span class="o">.</span><span class="n">pkg_obj</span> <span class="o">=</span> <span class="n">packages</span>
<span class="c">#: The set of all XML files that have been successfully</span>
<span class="c">#: parsed. This is used by :attr:`loaded` to determine if the</span>
<span class="c">#: sources have been fully parsed and the</span>
<span class="c">#: :class:`Bcfg2.Server.Plugins.Packages.Packages` plugin</span>
<span class="c">#: should be told to reload its data.</span>
<span class="bp">self</span><span class="o">.</span><span class="n">parsed</span> <span class="o">=</span> <span class="nb">set</span><span class="p">()</span>
<div class="viewcode-block" id="PackagesSources.set_debug"><a class="viewcode-back" href="../../../../../development/packages.html#Bcfg2.Server.Plugins.Packages.PackagesSources.PackagesSources.set_debug">[docs]</a> <span class="k">def</span> <span class="nf">set_debug</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">debug</span><span class="p">):</span>
<span class="n">Bcfg2</span><span class="o">.</span><span class="n">Server</span><span class="o">.</span><span class="n">Plugin</span><span class="o">.</span><span class="n">Debuggable</span><span class="o">.</span><span class="n">set_debug</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">debug</span><span class="p">)</span>
<span class="k">for</span> <span class="n">source</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">entries</span><span class="p">:</span>
<span class="n">source</span><span class="o">.</span><span class="n">set_debug</span><span class="p">(</span><span class="n">debug</span><span class="p">)</span></div>
<span class="n">set_debug</span><span class="o">.</span><span class="n">__doc__</span> <span class="o">=</span> <span class="n">Bcfg2</span><span class="o">.</span><span class="n">Server</span><span class="o">.</span><span class="n">Plugin</span><span class="o">.</span><span class="n">Plugin</span><span class="o">.</span><span class="n">set_debug</span><span class="o">.</span><span class="n">__doc__</span>
<div class="viewcode-block" id="PackagesSources.HandleEvent"><a class="viewcode-back" href="../../../../../development/packages.html#Bcfg2.Server.Plugins.Packages.PackagesSources.PackagesSources.HandleEvent">[docs]</a> <span class="k">def</span> <span class="nf">HandleEvent</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">event</span><span class="o">=</span><span class="bp">None</span><span class="p">):</span>
<span class="sd">""" HandleEvent is called whenever the FAM registers an event.</span>
<span class="sd"> When :attr:`loaded` becomes True,</span>
<span class="sd"> :func:`Bcfg2.Server.Plugins.Packages.Packages.Reload` is</span>
<span class="sd"> called to reload all plugin data from the configured sources.</span>
<span class="sd"> :param event: The event object</span>
<span class="sd"> :type event: Bcfg2.Server.FileMonitor.Event</span>
<span class="sd"> :returns: None</span>
<span class="sd"> """</span>
<span class="n">Bcfg2</span><span class="o">.</span><span class="n">Server</span><span class="o">.</span><span class="n">Plugin</span><span class="o">.</span><span class="n">StructFile</span><span class="o">.</span><span class="n">HandleEvent</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">event</span><span class="o">=</span><span class="n">event</span><span class="p">)</span>
<span class="k">if</span> <span class="n">event</span> <span class="ow">and</span> <span class="n">event</span><span class="o">.</span><span class="n">filename</span> <span class="o">!=</span> <span class="bp">self</span><span class="o">.</span><span class="n">name</span><span class="p">:</span>
<span class="k">for</span> <span class="n">fpath</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">extras</span><span class="p">:</span>
<span class="k">if</span> <span class="n">fpath</span> <span class="o">==</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">abspath</span><span class="p">(</span><span class="n">event</span><span class="o">.</span><span class="n">filename</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">parsed</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="n">fpath</span><span class="p">)</span>
<span class="k">break</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">loaded</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">logger</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="s">"Reloading Packages plugin"</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">pkg_obj</span><span class="o">.</span><span class="n">Reload</span><span class="p">()</span>
</div>
<span class="nd">@property</span>
<div class="viewcode-block" id="PackagesSources.loaded"><a class="viewcode-back" href="../../../../../development/packages.html#Bcfg2.Server.Plugins.Packages.PackagesSources.PackagesSources.loaded">[docs]</a> <span class="k">def</span> <span class="nf">loaded</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">""" Whether or not all XML files (``sources.xml`` and</span>
<span class="sd"> everything XIncluded in it) have been parsed. This flag is</span>
<span class="sd"> used to determine if the Packages plugin should be told to</span>
<span class="sd"> load its data. """</span>
<span class="k">return</span> <span class="nb">sorted</span><span class="p">(</span><span class="nb">list</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">parsed</span><span class="p">))</span> <span class="o">==</span> <span class="nb">sorted</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">extras</span><span class="p">)</span>
</div>
<span class="nd">@Bcfg2.Server.Plugin.track_statistics</span><span class="p">()</span>
<div class="viewcode-block" id="PackagesSources.Index"><a class="viewcode-back" href="../../../../../development/packages.html#Bcfg2.Server.Plugins.Packages.PackagesSources.PackagesSources.Index">[docs]</a> <span class="k">def</span> <span class="nf">Index</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="n">Bcfg2</span><span class="o">.</span><span class="n">Server</span><span class="o">.</span><span class="n">Plugin</span><span class="o">.</span><span class="n">StructFile</span><span class="o">.</span><span class="n">Index</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">entries</span> <span class="o">=</span> <span class="p">[]</span>
<span class="k">for</span> <span class="n">xsource</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">xdata</span><span class="o">.</span><span class="n">findall</span><span class="p">(</span><span class="s">'.//Source'</span><span class="p">):</span>
<span class="n">source</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">source_from_xml</span><span class="p">(</span><span class="n">xsource</span><span class="p">)</span>
<span class="k">if</span> <span class="n">source</span> <span class="ow">is</span> <span class="ow">not</span> <span class="bp">None</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">entries</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">source</span><span class="p">)</span></div>
<span class="n">Index</span><span class="o">.</span><span class="n">__doc__</span> <span class="o">=</span> <span class="n">Bcfg2</span><span class="o">.</span><span class="n">Server</span><span class="o">.</span><span class="n">Plugin</span><span class="o">.</span><span class="n">StructFile</span><span class="o">.</span><span class="n">Index</span><span class="o">.</span><span class="n">__doc__</span> <span class="o">+</span> <span class="s">"""</span>
<span class="s"> ``Index`` is responsible for calling :func:`source_from_xml`</span>
<span class="s"> for each ``Source`` tag in each file. """</span>
<span class="nd">@Bcfg2.Server.Plugin.track_statistics</span><span class="p">()</span>
<div class="viewcode-block" id="PackagesSources.source_from_xml"><a class="viewcode-back" href="../../../../../development/packages.html#Bcfg2.Server.Plugins.Packages.PackagesSources.PackagesSources.source_from_xml">[docs]</a> <span class="k">def</span> <span class="nf">source_from_xml</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">xsource</span><span class="p">):</span>
<span class="sd">""" Create a</span>
<span class="sd"> :class:`Bcfg2.Server.Plugins.Packages.Source.Source` subclass</span>
<span class="sd"> object from XML representation of a source in ``sources.xml``.</span>
<span class="sd"> ``source_from-xml`` determines the appropriate subclass of</span>
<span class="sd"> ``Source`` to instantiate according to the ``type`` attribute</span>
<span class="sd"> of the ``Source`` tag.</span>
<span class="sd"> :param xsource: The XML tag representing the source</span>
<span class="sd"> :type xsource: lxml.etree._Element</span>
<span class="sd"> :returns: :class:`Bcfg2.Server.Plugins.Packages.Source.Source`</span>
<span class="sd"> subclass, or None on error</span>
<span class="sd"> """</span>
<span class="n">stype</span> <span class="o">=</span> <span class="n">xsource</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s">"type"</span><span class="p">)</span>
<span class="k">if</span> <span class="n">stype</span> <span class="ow">is</span> <span class="bp">None</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">logger</span><span class="o">.</span><span class="n">error</span><span class="p">(</span><span class="s">"Packages: No type specified for source at </span><span class="si">%s</span><span class="s">, "</span>
<span class="s">"skipping"</span> <span class="o">%</span> <span class="p">(</span><span class="n">xsource</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s">"rawurl"</span><span class="p">,</span>
<span class="n">xsource</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s">"url"</span><span class="p">))))</span>
<span class="k">return</span> <span class="bp">None</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">module</span> <span class="o">=</span> <span class="nb">getattr</span><span class="p">(</span><span class="nb">__import__</span><span class="p">(</span><span class="s">"Bcfg2.Server.Plugins.Packages.</span><span class="si">%s</span><span class="s">"</span> <span class="o">%</span>
<span class="n">stype</span><span class="o">.</span><span class="n">title</span><span class="p">())</span><span class="o">.</span><span class="n">Server</span><span class="o">.</span><span class="n">Plugins</span><span class="o">.</span><span class="n">Packages</span><span class="p">,</span>
<span class="n">stype</span><span class="o">.</span><span class="n">title</span><span class="p">())</span>
<span class="n">cls</span> <span class="o">=</span> <span class="nb">getattr</span><span class="p">(</span><span class="n">module</span><span class="p">,</span> <span class="s">"</span><span class="si">%s</span><span class="s">Source"</span> <span class="o">%</span> <span class="n">stype</span><span class="o">.</span><span class="n">title</span><span class="p">())</span>
<span class="k">except</span> <span class="p">(</span><span class="ne">ImportError</span><span class="p">,</span> <span class="ne">AttributeError</span><span class="p">):</span>
<span class="n">err</span> <span class="o">=</span> <span class="n">sys</span><span class="o">.</span><span class="n">exc_info</span><span class="p">()[</span><span class="mi">1</span><span class="p">]</span>
<span class="bp">self</span><span class="o">.</span><span class="n">logger</span><span class="o">.</span><span class="n">error</span><span class="p">(</span><span class="s">"Packages: Unknown source type </span><span class="si">%s</span><span class="s"> (</span><span class="si">%s</span><span class="s">)"</span> <span class="o">%</span> <span class="p">(</span><span class="n">stype</span><span class="p">,</span>
<span class="n">err</span><span class="p">))</span>
<span class="k">return</span> <span class="bp">None</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">source</span> <span class="o">=</span> <span class="n">cls</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">cachepath</span><span class="p">,</span> <span class="n">xsource</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">setup</span><span class="p">)</span>
<span class="k">except</span> <span class="n">SourceInitError</span><span class="p">:</span>
<span class="n">err</span> <span class="o">=</span> <span class="n">sys</span><span class="o">.</span><span class="n">exc_info</span><span class="p">()[</span><span class="mi">1</span><span class="p">]</span>
<span class="bp">self</span><span class="o">.</span><span class="n">logger</span><span class="o">.</span><span class="n">error</span><span class="p">(</span><span class="s">"Packages: </span><span class="si">%s</span><span class="s">"</span> <span class="o">%</span> <span class="n">err</span><span class="p">)</span>
<span class="n">source</span> <span class="o">=</span> <span class="bp">None</span>
<span class="k">return</span> <span class="n">source</span>
</div>
<span class="k">def</span> <span class="nf">__getitem__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">key</span><span class="p">):</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">entries</span><span class="p">[</span><span class="n">key</span><span class="p">]</span>
<span class="k">def</span> <span class="nf">__repr__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">return</span> <span class="s">"PackagesSources: </span><span class="si">%s</span><span class="s">"</span> <span class="o">%</span> <span class="nb">repr</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">entries</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">__str__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">return</span> <span class="s">"PackagesSources: </span><span class="si">%s</span><span class="s"> sources"</span> <span class="o">%</span> <span class="nb">len</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">entries</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">__len__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">return</span> <span class="nb">len</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">entries</span><span class="p">)</span></div>
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