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<div role="main" class="document" itemscope="itemscope" itemtype="http://schema.org/Article">
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<h1>Source code for pylorax.dnfhelper</h1><div class="highlight"><pre>
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<span></span><span class="c1">#</span>
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<span class="c1"># dnfhelper.py</span>
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<span class="c1">#</span>
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<span class="c1"># Copyright (C) 2010-2015 Red Hat, Inc.</span>
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<span class="c1">#</span>
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<span class="c1"># This program is free software; you can redistribute it and/or modify</span>
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<span class="c1"># it under the terms of the GNU General Public License as published by</span>
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<span class="c1"># the Free Software Foundation; either version 2 of the License, or</span>
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<span class="c1"># (at your option) any later version.</span>
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<span class="c1">#</span>
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<span class="c1"># This program is distributed in the hope that it will be useful,</span>
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<span class="c1"># but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
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<span class="c1"># MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span>
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<span class="c1"># GNU General Public License for more details.</span>
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<span class="c1">#</span>
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<span class="c1"># You should have received a copy of the GNU General Public License</span>
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<span class="c1"># along with this program. If not, see <http://www.gnu.org/licenses/>.</span>
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<span class="c1">#</span>
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<span class="c1"># Red Hat Author(s): Martin Gracik <mgracik@redhat.com></span>
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<span class="c1"># Brian C. Lane <bcl@redhat.com></span>
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<span class="c1">#</span>
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<span class="kn">import</span> <span class="nn">logging</span>
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<span class="n">logger</span> <span class="o">=</span> <span class="n">logging</span><span class="o">.</span><span class="n">getLogger</span><span class="p">(</span><span class="s2">"pylorax.dnfhelper"</span><span class="p">)</span>
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<span class="kn">import</span> <span class="nn">dnf</span>
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<span class="kn">import</span> <span class="nn">dnf.transaction</span>
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<span class="kn">import</span> <span class="nn">collections</span>
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<span class="kn">import</span> <span class="nn">time</span>
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<span class="kn">import</span> <span class="nn">pylorax.output</span> <span class="k">as</span> <span class="nn">output</span>
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<span class="n">__all__</span> <span class="o">=</span> <span class="p">[</span><span class="s1">'LoraxDownloadCallback'</span><span class="p">,</span> <span class="s1">'LoraxRpmCallback'</span><span class="p">]</span>
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<span class="k">def</span> <span class="nf">_paced</span><span class="p">(</span><span class="n">fn</span><span class="p">):</span>
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<span class="sd">"""Execute `fn` no more often then every 2 seconds."""</span>
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<span class="k">def</span> <span class="nf">paced_fn</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">):</span>
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<span class="n">now</span> <span class="o">=</span> <span class="n">time</span><span class="o">.</span><span class="n">time</span><span class="p">()</span>
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<span class="k">if</span> <span class="n">now</span> <span class="o">-</span> <span class="bp">self</span><span class="o">.</span><span class="n">last_time</span> <span class="o"><</span> <span class="mi">2</span><span class="p">:</span>
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<span class="k">return</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">last_time</span> <span class="o">=</span> <span class="n">now</span>
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<span class="k">return</span> <span class="n">fn</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">)</span>
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<span class="k">return</span> <span class="n">paced_fn</span>
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<div class="viewcode-block" id="LoraxDownloadCallback"><a class="viewcode-back" href="../../pylorax.html#pylorax.dnfhelper.LoraxDownloadCallback">[docs]</a><span class="k">class</span> <span class="nc">LoraxDownloadCallback</span><span class="p">(</span><span class="n">dnf</span><span class="o">.</span><span class="n">callback</span><span class="o">.</span><span class="n">DownloadProgress</span><span class="p">):</span>
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<span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">downloads</span> <span class="o">=</span> <span class="n">collections</span><span class="o">.</span><span class="n">defaultdict</span><span class="p">(</span><span class="nb">int</span><span class="p">)</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">last_time</span> <span class="o">=</span> <span class="n">time</span><span class="o">.</span><span class="n">time</span><span class="p">()</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">total_files</span> <span class="o">=</span> <span class="mi">0</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">total_size</span> <span class="o">=</span> <span class="mi">0</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">pkgno</span> <span class="o">=</span> <span class="mi">0</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">total</span> <span class="o">=</span> <span class="mi">0</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">output</span> <span class="o">=</span> <span class="n">output</span><span class="o">.</span><span class="n">LoraxOutput</span><span class="p">()</span>
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<span class="nd">@_paced</span>
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<span class="k">def</span> <span class="nf">_update</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
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<span class="n">msg</span> <span class="o">=</span> <span class="s2">"Downloading </span><span class="si">%(pkgno)s</span><span class="s2"> / </span><span class="si">%(total_files)s</span><span class="s2"> RPMs, "</span> \
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<span class="s2">"</span><span class="si">%(downloaded)s</span><span class="s2"> / </span><span class="si">%(total_size)s</span><span class="s2"> (</span><span class="si">%(percent)d%%</span><span class="s2">) done.</span><span class="se">\n</span><span class="s2">"</span>
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<span class="n">downloaded</span> <span class="o">=</span> <span class="nb">sum</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">downloads</span><span class="o">.</span><span class="n">values</span><span class="p">())</span>
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<span class="n">vals</span> <span class="o">=</span> <span class="p">{</span>
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<span class="s1">'downloaded'</span> <span class="p">:</span> <span class="n">downloaded</span><span class="p">,</span>
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<span class="s1">'percent'</span> <span class="p">:</span> <span class="nb">int</span><span class="p">(</span><span class="mi">100</span> <span class="o">*</span> <span class="n">downloaded</span><span class="o">/</span><span class="bp">self</span><span class="o">.</span><span class="n">total_size</span><span class="p">),</span>
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<span class="s1">'pkgno'</span> <span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">pkgno</span><span class="p">,</span>
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<span class="s1">'total_files'</span> <span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">total_files</span><span class="p">,</span>
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<span class="s1">'total_size'</span> <span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">total_size</span>
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<span class="p">}</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">output</span><span class="o">.</span><span class="n">write</span><span class="p">(</span><span class="n">msg</span> <span class="o">%</span> <span class="n">vals</span><span class="p">)</span>
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<div class="viewcode-block" id="LoraxDownloadCallback.end"><a class="viewcode-back" href="../../pylorax.html#pylorax.dnfhelper.LoraxDownloadCallback.end">[docs]</a> <span class="k">def</span> <span class="nf">end</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">payload</span><span class="p">,</span> <span class="n">status</span><span class="p">,</span> <span class="n">msg</span><span class="p">):</span>
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<span class="n">nevra</span> <span class="o">=</span> <span class="nb">str</span><span class="p">(</span><span class="n">payload</span><span class="p">)</span>
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<span class="k">if</span> <span class="n">status</span> <span class="ow">is</span> <span class="n">dnf</span><span class="o">.</span><span class="n">callback</span><span class="o">.</span><span class="n">STATUS_OK</span><span class="p">:</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">downloads</span><span class="p">[</span><span class="n">nevra</span><span class="p">]</span> <span class="o">=</span> <span class="n">payload</span><span class="o">.</span><span class="n">download_size</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">pkgno</span> <span class="o">+=</span> <span class="mi">1</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">_update</span><span class="p">()</span>
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<span class="k">return</span>
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<span class="n">logger</span><span class="o">.</span><span class="n">critical</span><span class="p">(</span><span class="s2">"Failed to download '</span><span class="si">%s</span><span class="s2">': </span><span class="si">%d</span><span class="s2"> - </span><span class="si">%s</span><span class="s2">"</span><span class="p">,</span> <span class="n">nevra</span><span class="p">,</span> <span class="n">status</span><span class="p">,</span> <span class="n">msg</span><span class="p">)</span></div>
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<div class="viewcode-block" id="LoraxDownloadCallback.progress"><a class="viewcode-back" href="../../pylorax.html#pylorax.dnfhelper.LoraxDownloadCallback.progress">[docs]</a> <span class="k">def</span> <span class="nf">progress</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">payload</span><span class="p">,</span> <span class="n">done</span><span class="p">):</span>
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<span class="n">nevra</span> <span class="o">=</span> <span class="nb">str</span><span class="p">(</span><span class="n">payload</span><span class="p">)</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">downloads</span><span class="p">[</span><span class="n">nevra</span><span class="p">]</span> <span class="o">=</span> <span class="n">done</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">_update</span><span class="p">()</span></div>
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<span class="c1"># dnf 2.5.0 adds a new argument, accept it if it is passed</span>
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<span class="c1"># pylint: disable=arguments-differ</span>
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<div class="viewcode-block" id="LoraxDownloadCallback.start"><a class="viewcode-back" href="../../pylorax.html#pylorax.dnfhelper.LoraxDownloadCallback.start">[docs]</a> <span class="k">def</span> <span class="nf">start</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">total_files</span><span class="p">,</span> <span class="n">total_size</span><span class="p">,</span> <span class="n">total_drpms</span><span class="o">=</span><span class="mi">0</span><span class="p">):</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">total_files</span> <span class="o">=</span> <span class="n">total_files</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">total_size</span> <span class="o">=</span> <span class="n">total_size</span></div></div>
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<div class="viewcode-block" id="LoraxRpmCallback"><a class="viewcode-back" href="../../pylorax.html#pylorax.dnfhelper.LoraxRpmCallback">[docs]</a><span class="k">class</span> <span class="nc">LoraxRpmCallback</span><span class="p">(</span><span class="n">dnf</span><span class="o">.</span><span class="n">callback</span><span class="o">.</span><span class="n">TransactionProgress</span><span class="p">):</span>
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<span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
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<span class="nb">super</span><span class="p">(</span><span class="n">LoraxRpmCallback</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="fm">__init__</span><span class="p">()</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">_last_ts</span> <span class="o">=</span> <span class="kc">None</span>
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<div class="viewcode-block" id="LoraxRpmCallback.progress"><a class="viewcode-back" href="../../pylorax.html#pylorax.dnfhelper.LoraxRpmCallback.progress">[docs]</a> <span class="k">def</span> <span class="nf">progress</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">package</span><span class="p">,</span> <span class="n">action</span><span class="p">,</span> <span class="n">ti_done</span><span class="p">,</span> <span class="n">ti_total</span><span class="p">,</span> <span class="n">ts_done</span><span class="p">,</span> <span class="n">ts_total</span><span class="p">):</span>
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<span class="k">if</span> <span class="n">action</span> <span class="o">==</span> <span class="n">dnf</span><span class="o">.</span><span class="n">transaction</span><span class="o">.</span><span class="n">PKG_INSTALL</span><span class="p">:</span> <span class="c1"># pylint: disable=no-member</span>
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<span class="c1"># do not report same package twice</span>
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<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_last_ts</span> <span class="o">==</span> <span class="n">ts_done</span><span class="p">:</span>
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<span class="k">return</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">_last_ts</span> <span class="o">=</span> <span class="n">ts_done</span>
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<span class="n">msg</span> <span class="o">=</span> <span class="s1">'(</span><span class="si">%d</span><span class="s1">/</span><span class="si">%d</span><span class="s1">) </span><span class="si">%s</span><span class="s1">'</span> <span class="o">%</span> <span class="p">(</span><span class="n">ts_done</span><span class="p">,</span> <span class="n">ts_total</span><span class="p">,</span> <span class="n">package</span><span class="p">)</span>
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<span class="n">logger</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="n">msg</span><span class="p">)</span>
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<span class="k">elif</span> <span class="n">action</span> <span class="o">==</span> <span class="n">dnf</span><span class="o">.</span><span class="n">transaction</span><span class="o">.</span><span class="n">TRANS_POST</span><span class="p">:</span> <span class="c1"># pylint: disable=no-member</span>
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<span class="n">msg</span> <span class="o">=</span> <span class="s2">"Performing post-installation setup tasks"</span>
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<span class="n">logger</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="n">msg</span><span class="p">)</span></div>
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<div class="viewcode-block" id="LoraxRpmCallback.error"><a class="viewcode-back" href="../../pylorax.html#pylorax.dnfhelper.LoraxRpmCallback.error">[docs]</a> <span class="k">def</span> <span class="nf">error</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">message</span><span class="p">):</span>
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<span class="n">logger</span><span class="o">.</span><span class="n">warning</span><span class="p">(</span><span class="n">message</span><span class="p">)</span></div></div>
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