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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.api.dnfbase</h1><div class="highlight"><pre>
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<span></span><span class="c1">#</span>
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<span class="c1"># Copyright (C) 2017-2018 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"># pylint: disable=bad-preconf-access</span>
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<span class="kn">import</span> <span class="nn">logging</span>
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<span class="n">log</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">"lorax-composer"</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.logging</span>
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<span class="kn">from</span> <span class="nn">glob</span> <span class="k">import</span> <span class="n">glob</span>
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<span class="kn">import</span> <span class="nn">os</span>
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<span class="kn">import</span> <span class="nn">shutil</span>
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<span class="kn">from</span> <span class="nn">threading</span> <span class="k">import</span> <span class="n">Lock</span>
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<span class="kn">import</span> <span class="nn">time</span>
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<span class="kn">from</span> <span class="nn">pylorax</span> <span class="k">import</span> <span class="n">DEFAULT_PLATFORM_ID</span>
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<span class="kn">from</span> <span class="nn">pylorax.sysutils</span> <span class="k">import</span> <span class="n">flatconfig</span>
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<div class="viewcode-block" id="DNFLock"><a class="viewcode-back" href="../../../pylorax.api.html#pylorax.api.dnfbase.DNFLock">[docs]</a><span class="k">class</span> <span class="nc">DNFLock</span><span class="p">(</span><span class="nb">object</span><span class="p">):</span>
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<span class="sd">"""Hold the dnf.Base object and a Lock to control access to it.</span>
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<span class="sd"> self.dbo is a property that returns the dnf.Base object, but it *may* change</span>
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<span class="sd"> from one call to the next if the upstream repositories have changed.</span>
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<span class="sd"> """</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> <span class="n">conf</span><span class="p">,</span> <span class="n">expire_secs</span><span class="o">=</span><span class="mi">6</span><span class="o">*</span><span class="mi">60</span><span class="o">*</span><span class="mi">60</span><span class="p">):</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">_conf</span> <span class="o">=</span> <span class="n">conf</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">_lock</span> <span class="o">=</span> <span class="n">Lock</span><span class="p">()</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">dbo</span> <span class="o">=</span> <span class="n">get_base_object</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_conf</span><span class="p">)</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">_expire_secs</span> <span class="o">=</span> <span class="n">expire_secs</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">_expire_time</span> <span class="o">=</span> <span class="n">time</span><span class="o">.</span><span class="n">time</span><span class="p">()</span> <span class="o">+</span> <span class="bp">self</span><span class="o">.</span><span class="n">_expire_secs</span>
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<span class="nd">@property</span>
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<span class="k">def</span> <span class="nf">lock</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
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<span class="sd">"""Check for repo updates (using expiration time) and return the lock</span>
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<span class="sd"> If the repository has been updated, tear down the old dnf.Base and</span>
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<span class="sd"> create a new one. This is the only way to force dnf to use the new</span>
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<span class="sd"> metadata.</span>
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<span class="sd"> """</span>
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<span class="k">if</span> <span class="n">time</span><span class="o">.</span><span class="n">time</span><span class="p">()</span> <span class="o">></span> <span class="bp">self</span><span class="o">.</span><span class="n">_expire_time</span><span class="p">:</span>
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<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">lock_check</span>
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<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_lock</span>
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<span class="nd">@property</span>
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<span class="k">def</span> <span class="nf">lock_check</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
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<span class="sd">"""Force a check for repo updates and return the lock</span>
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<span class="sd"> Use this method sparingly, it removes the repodata and downloads a new copy every time.</span>
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<span class="sd"> """</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">_expire_time</span> <span class="o">=</span> <span class="n">time</span><span class="o">.</span><span class="n">time</span><span class="p">()</span> <span class="o">+</span> <span class="bp">self</span><span class="o">.</span><span class="n">_expire_secs</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">dbo</span><span class="o">.</span><span class="n">update_cache</span><span class="p">()</span>
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<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_lock</span></div>
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<div class="viewcode-block" id="get_base_object"><a class="viewcode-back" href="../../../pylorax.api.html#pylorax.api.dnfbase.get_base_object">[docs]</a><span class="k">def</span> <span class="nf">get_base_object</span><span class="p">(</span><span class="n">conf</span><span class="p">):</span>
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<span class="sd">"""Get the DNF object with settings from the config file</span>
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<span class="sd"> :param conf: configuration object</span>
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<span class="sd"> :type conf: ComposerParser</span>
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<span class="sd"> :returns: A DNF Base object</span>
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<span class="sd"> :rtype: dnf.Base</span>
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<span class="sd"> """</span>
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<span class="n">cachedir</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">conf</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"composer"</span><span class="p">,</span> <span class="s2">"cache_dir"</span><span class="p">))</span>
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<span class="n">dnfconf</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">conf</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"composer"</span><span class="p">,</span> <span class="s2">"dnf_conf"</span><span class="p">))</span>
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<span class="n">dnfroot</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">conf</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"composer"</span><span class="p">,</span> <span class="s2">"dnf_root"</span><span class="p">))</span>
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<span class="n">repodir</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">conf</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"composer"</span><span class="p">,</span> <span class="s2">"repo_dir"</span><span class="p">))</span>
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<span class="c1"># Setup the config for the DNF Base object</span>
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<span class="n">dbo</span> <span class="o">=</span> <span class="n">dnf</span><span class="o">.</span><span class="n">Base</span><span class="p">()</span>
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<span class="n">dbc</span> <span class="o">=</span> <span class="n">dbo</span><span class="o">.</span><span class="n">conf</span>
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<span class="c1"># TODO - Handle this</span>
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<span class="c1"># dbc.logdir = logdir</span>
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<span class="n">dbc</span><span class="o">.</span><span class="n">installroot</span> <span class="o">=</span> <span class="n">dnfroot</span>
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<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">isdir</span><span class="p">(</span><span class="n">dnfroot</span><span class="p">):</span>
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<span class="n">os</span><span class="o">.</span><span class="n">makedirs</span><span class="p">(</span><span class="n">dnfroot</span><span class="p">)</span>
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<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">isdir</span><span class="p">(</span><span class="n">repodir</span><span class="p">):</span>
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<span class="n">os</span><span class="o">.</span><span class="n">makedirs</span><span class="p">(</span><span class="n">repodir</span><span class="p">)</span>
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<span class="n">dbc</span><span class="o">.</span><span class="n">cachedir</span> <span class="o">=</span> <span class="n">cachedir</span>
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<span class="n">dbc</span><span class="o">.</span><span class="n">reposdir</span> <span class="o">=</span> <span class="p">[</span><span class="n">repodir</span><span class="p">]</span>
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<span class="n">dbc</span><span class="o">.</span><span class="n">install_weak_deps</span> <span class="o">=</span> <span class="kc">False</span>
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<span class="n">dbc</span><span class="o">.</span><span class="n">prepend_installroot</span><span class="p">(</span><span class="s1">'persistdir'</span><span class="p">)</span>
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<span class="c1"># this is a weird 'AppendOption' thing that, when you set it,</span>
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<span class="c1"># actually appends. Doing this adds 'nodocs' to the existing list</span>
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<span class="c1"># of values, over in libdnf, it does not replace the existing values.</span>
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<span class="n">dbc</span><span class="o">.</span><span class="n">tsflags</span> <span class="o">=</span> <span class="p">[</span><span class="s1">'nodocs'</span><span class="p">]</span>
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<span class="k">if</span> <span class="n">conf</span><span class="o">.</span><span class="n">get_default</span><span class="p">(</span><span class="s2">"dnf"</span><span class="p">,</span> <span class="s2">"proxy"</span><span class="p">,</span> <span class="kc">None</span><span class="p">):</span>
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<span class="n">dbc</span><span class="o">.</span><span class="n">proxy</span> <span class="o">=</span> <span class="n">conf</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"dnf"</span><span class="p">,</span> <span class="s2">"proxy"</span><span class="p">)</span>
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<span class="k">if</span> <span class="n">conf</span><span class="o">.</span><span class="n">has_option</span><span class="p">(</span><span class="s2">"dnf"</span><span class="p">,</span> <span class="s2">"sslverify"</span><span class="p">)</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">conf</span><span class="o">.</span><span class="n">getboolean</span><span class="p">(</span><span class="s2">"dnf"</span><span class="p">,</span> <span class="s2">"sslverify"</span><span class="p">):</span>
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<span class="n">dbc</span><span class="o">.</span><span class="n">sslverify</span> <span class="o">=</span> <span class="kc">False</span>
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<span class="n">_releasever</span> <span class="o">=</span> <span class="n">conf</span><span class="o">.</span><span class="n">get_default</span><span class="p">(</span><span class="s2">"composer"</span><span class="p">,</span> <span class="s2">"releasever"</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span>
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<span class="k">if</span> <span class="ow">not</span> <span class="n">_releasever</span><span class="p">:</span>
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<span class="c1"># Use the releasever of the host system</span>
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<span class="n">_releasever</span> <span class="o">=</span> <span class="n">dnf</span><span class="o">.</span><span class="n">rpm</span><span class="o">.</span><span class="n">detect_releasever</span><span class="p">(</span><span class="s2">"/"</span><span class="p">)</span>
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<span class="n">log</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="s2">"releasever = </span><span class="si">%s</span><span class="s2">"</span><span class="p">,</span> <span class="n">_releasever</span><span class="p">)</span>
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<span class="n">dbc</span><span class="o">.</span><span class="n">releasever</span> <span class="o">=</span> <span class="n">_releasever</span>
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<span class="c1"># DNF 3.2 needs to have module_platform_id set, otherwise depsolve won't work correctly</span>
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<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="s2">"/etc/os-release"</span><span class="p">):</span>
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<span class="n">log</span><span class="o">.</span><span class="n">warning</span><span class="p">(</span><span class="s2">"/etc/os-release is missing, cannot determine platform id, falling back to </span><span class="si">%s</span><span class="s2">"</span><span class="p">,</span> <span class="n">DEFAULT_PLATFORM_ID</span><span class="p">)</span>
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<span class="n">platform_id</span> <span class="o">=</span> <span class="n">DEFAULT_PLATFORM_ID</span>
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<span class="k">else</span><span class="p">:</span>
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<span class="n">os_release</span> <span class="o">=</span> <span class="n">flatconfig</span><span class="p">(</span><span class="s2">"/etc/os-release"</span><span class="p">)</span>
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<span class="n">platform_id</span> <span class="o">=</span> <span class="n">os_release</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">"PLATFORM_ID"</span><span class="p">,</span> <span class="n">DEFAULT_PLATFORM_ID</span><span class="p">)</span>
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<span class="n">log</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="s2">"Using </span><span class="si">%s</span><span class="s2"> for module_platform_id"</span><span class="p">,</span> <span class="n">platform_id</span><span class="p">)</span>
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<span class="n">dbc</span><span class="o">.</span><span class="n">module_platform_id</span> <span class="o">=</span> <span class="n">platform_id</span>
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<span class="c1"># Make sure metadata is always current</span>
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<span class="n">dbc</span><span class="o">.</span><span class="n">metadata_expire</span> <span class="o">=</span> <span class="mi">0</span>
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<span class="n">dbc</span><span class="o">.</span><span class="n">metadata_expire_filter</span> <span class="o">=</span> <span class="s2">"never"</span>
|
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<span class="c1"># write the dnf configuration file</span>
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<span class="k">with</span> <span class="nb">open</span><span class="p">(</span><span class="n">dnfconf</span><span class="p">,</span> <span class="s2">"w"</span><span class="p">)</span> <span class="k">as</span> <span class="n">f</span><span class="p">:</span>
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<span class="n">f</span><span class="o">.</span><span class="n">write</span><span class="p">(</span><span class="n">dbc</span><span class="o">.</span><span class="n">dump</span><span class="p">())</span>
|
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<span class="c1"># dnf needs the repos all in one directory, composer uses repodir for this</span>
|
|
<span class="c1"># if system repos are supposed to be used, copy them into repodir, overwriting any previous copies</span>
|
|
<span class="k">if</span> <span class="ow">not</span> <span class="n">conf</span><span class="o">.</span><span class="n">has_option</span><span class="p">(</span><span class="s2">"repos"</span><span class="p">,</span> <span class="s2">"use_system_repos"</span><span class="p">)</span> <span class="ow">or</span> <span class="n">conf</span><span class="o">.</span><span class="n">getboolean</span><span class="p">(</span><span class="s2">"repos"</span><span class="p">,</span> <span class="s2">"use_system_repos"</span><span class="p">):</span>
|
|
<span class="k">for</span> <span class="n">repo_file</span> <span class="ow">in</span> <span class="n">glob</span><span class="p">(</span><span class="s2">"/etc/yum.repos.d/*.repo"</span><span class="p">):</span>
|
|
<span class="n">shutil</span><span class="o">.</span><span class="n">copy2</span><span class="p">(</span><span class="n">repo_file</span><span class="p">,</span> <span class="n">repodir</span><span class="p">)</span>
|
|
<span class="n">dbo</span><span class="o">.</span><span class="n">read_all_repos</span><span class="p">()</span>
|
|
|
|
<span class="c1"># Update the metadata from the enabled repos to speed up later operations</span>
|
|
<span class="n">log</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="s2">"Updating repository metadata"</span><span class="p">)</span>
|
|
<span class="k">try</span><span class="p">:</span>
|
|
<span class="n">dbo</span><span class="o">.</span><span class="n">fill_sack</span><span class="p">(</span><span class="n">load_system_repo</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span>
|
|
<span class="n">dbo</span><span class="o">.</span><span class="n">read_comps</span><span class="p">()</span>
|
|
<span class="n">dbo</span><span class="o">.</span><span class="n">update_cache</span><span class="p">()</span>
|
|
<span class="k">except</span> <span class="n">dnf</span><span class="o">.</span><span class="n">exceptions</span><span class="o">.</span><span class="n">Error</span> <span class="k">as</span> <span class="n">e</span><span class="p">:</span>
|
|
<span class="n">log</span><span class="o">.</span><span class="n">error</span><span class="p">(</span><span class="s2">"Failed to update metadata: </span><span class="si">%s</span><span class="s2">"</span><span class="p">,</span> <span class="nb">str</span><span class="p">(</span><span class="n">e</span><span class="p">))</span>
|
|
<span class="k">raise</span> <span class="ne">RuntimeError</span><span class="p">(</span><span class="s2">"Fetching metadata failed: </span><span class="si">%s</span><span class="s2">"</span> <span class="o">%</span> <span class="nb">str</span><span class="p">(</span><span class="n">e</span><span class="p">))</span>
|
|
|
|
<span class="k">return</span> <span class="n">dbo</span></div>
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|
</pre></div>
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