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  <h1>Source code for lwr.grub</h1><div class="highlight"><pre>
<span></span><span class="c1"># live-wrapper - Wrapper for vmdebootstrap for creating live images</span>
<span class="c1"># (C) Iain R. Learmonth 2015 &lt;irl@debian.org&gt;</span>
<span class="c1"># See COPYING for terms of usage, modification and redistribution.</span>
<span class="c1">#</span>
<span class="c1"># lwr/grub.py - Grub 2 helpers</span>

<span class="sd">&quot;&quot;&quot;</span>
<span class="sd">The lwr.grub module contains helpers for GRUB 2 including the installation</span>
<span class="sd">of GRUB files to the cdroot and the generation of the grub.cfg and loopback.cfg</span>
<span class="sd">files.</span>
<span class="sd">&quot;&quot;&quot;</span>

<span class="kn">import</span> <span class="nn">os</span>

<div class="viewcode-block" id="generate_cfg"><a class="viewcode-back" href="../../lwr.html#lwr.grub.generate_cfg">[docs]</a><span class="k">def</span> <span class="nf">generate_cfg</span><span class="p">(</span><span class="n">bootconfig</span><span class="p">,</span> <span class="n">submenu</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span>
    <span class="k">if</span> <span class="ow">not</span> <span class="n">submenu</span><span class="p">:</span>
        <span class="n">ret</span> <span class="o">=</span> <span class="p">(</span><span class="s2">&quot;if [ $</span><span class="si">{iso_path}</span><span class="s2"> ] ; then</span><span class="se">\n</span><span class="s2">set loopback=</span><span class="se">\&quot;</span><span class="s2">&quot;</span> <span class="o">+</span>
               <span class="s2">&quot;findiso=$</span><span class="si">{iso_path}</span><span class="se">\&quot;\n</span><span class="s2">fi</span><span class="se">\n\n</span><span class="s2">&quot;</span><span class="p">)</span>
    <span class="k">else</span><span class="p">:</span>
        <span class="n">ret</span> <span class="o">=</span> <span class="nb">str</span><span class="p">()</span>
    <span class="k">for</span> <span class="n">entry</span> <span class="ow">in</span> <span class="n">bootconfig</span><span class="o">.</span><span class="n">entries</span><span class="p">:</span>
        <span class="k">if</span> <span class="n">entry</span><span class="p">[</span><span class="s1">&#39;type&#39;</span><span class="p">]</span> <span class="o">==</span> <span class="s2">&quot;menu&quot;</span><span class="p">:</span>
            <span class="k">if</span> <span class="n">entry</span><span class="p">[</span><span class="s1">&#39;subentries&#39;</span><span class="p">]</span><span class="o">.</span><span class="n">is_empty</span><span class="p">([</span><span class="s2">&quot;linux&quot;</span><span class="p">,</span> <span class="s2">&quot;menu&quot;</span><span class="p">]):</span>
                <span class="k">continue</span>
            <span class="n">ret</span> <span class="o">+=</span> <span class="s2">&quot;submenu </span><span class="se">\&quot;</span><span class="si">%s</span><span class="se">\&quot;</span><span class="s2"> {</span><span class="se">\n</span><span class="s2">&quot;</span>  <span class="o">%</span> <span class="p">(</span><span class="n">entry</span><span class="p">[</span><span class="s1">&#39;description&#39;</span><span class="p">],)</span>
            <span class="n">ret</span> <span class="o">+=</span> <span class="n">generate_cfg</span><span class="p">(</span><span class="n">entry</span><span class="p">[</span><span class="s1">&#39;subentries&#39;</span><span class="p">],</span> <span class="n">submenu</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span>
            <span class="n">ret</span> <span class="o">+=</span> <span class="s2">&quot;}</span><span class="se">\n</span><span class="s2">&quot;</span>
        <span class="k">if</span> <span class="n">entry</span><span class="p">[</span><span class="s1">&#39;type&#39;</span><span class="p">]</span> <span class="o">==</span> <span class="s2">&quot;linux&quot;</span><span class="p">:</span> 
            <span class="n">ret</span> <span class="o">+=</span> <span class="s2">&quot;menuentry </span><span class="se">\&quot;</span><span class="si">%s</span><span class="se">\&quot;</span><span class="s2"> {</span><span class="se">\n</span><span class="s2">&quot;</span> <span class="o">%</span> <span class="p">(</span><span class="n">entry</span><span class="p">[</span><span class="s1">&#39;description&#39;</span><span class="p">],)</span>
            <span class="n">ret</span> <span class="o">+=</span> <span class="s2">&quot;  linux  </span><span class="si">%s</span><span class="s2"> </span><span class="si">%s</span><span class="s2"> </span><span class="se">\&quot;</span><span class="s2">$</span><span class="si">{loopback}</span><span class="se">\&quot;\n</span><span class="s2">&quot;</span> <span class="o">%</span> <span class="p">(</span><span class="n">entry</span><span class="p">[</span><span class="s1">&#39;kernel&#39;</span><span class="p">],</span> <span class="n">entry</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s1">&#39;cmdline&#39;</span><span class="p">,</span> <span class="s1">&#39;&#39;</span><span class="p">),)</span>
            <span class="k">if</span> <span class="n">entry</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s1">&#39;initrd&#39;</span><span class="p">)</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span>
                <span class="n">ret</span> <span class="o">+=</span> <span class="s2">&quot;  initrd </span><span class="si">%s</span><span class="se">\n</span><span class="s2">&quot;</span> <span class="o">%</span> <span class="p">(</span><span class="n">entry</span><span class="p">[</span><span class="s1">&#39;initrd&#39;</span><span class="p">],)</span>
            <span class="n">ret</span> <span class="o">+=</span> <span class="s2">&quot;}</span><span class="se">\n</span><span class="s2">&quot;</span>
    <span class="k">return</span> <span class="n">ret</span></div>

<div class="viewcode-block" id="install_grub"><a class="viewcode-back" href="../../lwr.html#lwr.grub.install_grub">[docs]</a><span class="k">def</span> <span class="nf">install_grub</span><span class="p">(</span><span class="n">cdroot</span><span class="p">,</span> <span class="n">bootconfig</span><span class="p">):</span>
    <span class="sd">&quot;&quot;&quot;</span>
<span class="sd">    Can use cdroot as a relative path inside the actual cdroot.</span>
<span class="sd">    The d-i/ and live/ directories are used directly.</span>
<span class="sd">    &quot;&quot;&quot;</span>
    <span class="n">cfg</span> <span class="o">=</span> <span class="n">generate_cfg</span><span class="p">(</span><span class="n">bootconfig</span><span class="p">)</span>
    <span class="k">with</span> <span class="nb">open</span><span class="p">(</span><span class="s2">&quot;</span><span class="si">%s</span><span class="s2">/boot/grub/grub.cfg&quot;</span> <span class="o">%</span> <span class="p">(</span><span class="n">cdroot</span><span class="p">,),</span> <span class="s2">&quot;a&quot;</span><span class="p">)</span> <span class="k">as</span> <span class="n">cfgout</span><span class="p">:</span>
        <span class="n">cfgout</span><span class="o">.</span><span class="n">write</span><span class="p">(</span><span class="n">cfg</span><span class="p">)</span>
    <span class="k">with</span> <span class="nb">open</span><span class="p">(</span><span class="s2">&quot;</span><span class="si">%s</span><span class="s2">/boot/grub/loopback.cfg&quot;</span> <span class="o">%</span> <span class="p">(</span><span class="n">cdroot</span><span class="p">,),</span> <span class="s2">&quot;w&quot;</span><span class="p">)</span> <span class="k">as</span> <span class="n">loopout</span><span class="p">:</span>
        <span class="n">loopout</span><span class="o">.</span><span class="n">write</span><span class="p">(</span><span class="s2">&quot;source /grub/grub.cfg&quot;</span><span class="p">)</span></div>
</pre></div>

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