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<table cellspacing=0 cellpadding=0>
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<th class=docs><h1>fetch.c</h1></th>
<th class=code></th>
</tr>
</thead>
<tbody>
<tr id='section-1'>
<td class=docs>
<div class="pilwrap">
<a class="pilcrow" href="#section-1">¶</a>
</div>
</td>
<td class=code>
<div class='highlight'><pre><span class="cp">#include "common.h"</span>
<span class="cp">#include <git2.h></span>
<span class="cp">#include <stdio.h></span>
<span class="cp">#include <stdlib.h></span>
<span class="cp">#include <string.h></span>
<span class="cp">#ifndef _WIN32</span>
<span class="cp"># include <pthread.h></span>
<span class="cp"># include <unistd.h></span>
<span class="cp">#endif</span>
<span class="k">struct</span> <span class="n">dl_data</span> <span class="p">{</span>
<span class="n">git_remote</span> <span class="o">*</span><span class="n">remote</span><span class="p">;</span>
<span class="kt">int</span> <span class="n">ret</span><span class="p">;</span>
<span class="kt">int</span> <span class="n">finished</span><span class="p">;</span>
<span class="p">};</span>
<span class="k">static</span> <span class="kt">void</span> <span class="nf">progress_cb</span><span class="p">(</span><span class="k">const</span> <span class="kt">char</span> <span class="o">*</span><span class="n">str</span><span class="p">,</span> <span class="kt">int</span> <span class="n">len</span><span class="p">,</span> <span class="kt">void</span> <span class="o">*</span><span class="n">data</span><span class="p">)</span>
<span class="p">{</span>
<span class="p">(</span><span class="kt">void</span><span class="p">)</span><span class="n">data</span><span class="p">;</span>
<span class="n">printf</span><span class="p">(</span><span class="s">"remote: %.*s"</span><span class="p">,</span> <span class="n">len</span><span class="p">,</span> <span class="n">str</span><span class="p">);</span>
<span class="n">fflush</span><span class="p">(</span><span class="n">stdout</span><span class="p">);</span> <span class="cm">/* We don't have the \n to force the flush */</span>
<span class="p">}</span>
<span class="k">static</span> <span class="kt">void</span> <span class="o">*</span><span class="nf">download</span><span class="p">(</span><span class="kt">void</span> <span class="o">*</span><span class="n">ptr</span><span class="p">)</span>
<span class="p">{</span>
<span class="k">struct</span> <span class="n">dl_data</span> <span class="o">*</span><span class="n">data</span> <span class="o">=</span> <span class="p">(</span><span class="k">struct</span> <span class="n">dl_data</span> <span class="o">*</span><span class="p">)</span><span class="n">ptr</span><span class="p">;</span></pre></div>
</td>
</tr>
<tr id='section-2'>
<td class=docs>
<div class="pilwrap">
<a class="pilcrow" href="#section-2">¶</a>
</div>
<p>Connect to the remote end specifying that we want to fetch
information from it.</p>
</td>
<td class=code>
<div class='highlight'><pre> <span class="k">if</span> <span class="p">(</span><span class="n"><a name="git_remote_connect-6" class="fnlink" href="../../#HEAD/group/remote/git_remote_connect">git_remote_connect</a></span><span class="p">(</span><span class="n">data</span><span class="o">-></span><span class="n">remote</span><span class="p">,</span> <span class="n">GIT_DIRECTION_FETCH</span><span class="p">)</span> <span class="o"><</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span>
<span class="n">data</span><span class="o">-></span><span class="n">ret</span> <span class="o">=</span> <span class="o">-</span><span class="mi">1</span><span class="p">;</span>
<span class="k">goto</span> <span class="n">exit</span><span class="p">;</span>
<span class="p">}</span></pre></div>
</td>
</tr>
<tr id='section-3'>
<td class=docs>
<div class="pilwrap">
<a class="pilcrow" href="#section-3">¶</a>
</div>
<p>Download the packfile and index it. This function updates the
amount of received data and the indexer stats which lets you
inform the user about progress.</p>
</td>
<td class=code>
<div class='highlight'><pre> <span class="k">if</span> <span class="p">(</span><span class="n"><a name="git_remote_download-7" class="fnlink" href="../../#HEAD/group/remote/git_remote_download">git_remote_download</a></span><span class="p">(</span><span class="n">data</span><span class="o">-></span><span class="n">remote</span><span class="p">,</span> <span class="nb">NULL</span><span class="p">,</span> <span class="nb">NULL</span><span class="p">)</span> <span class="o"><</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span>
<span class="n">data</span><span class="o">-></span><span class="n">ret</span> <span class="o">=</span> <span class="o">-</span><span class="mi">1</span><span class="p">;</span>
<span class="k">goto</span> <span class="n">exit</span><span class="p">;</span>
<span class="p">}</span>
<span class="n">data</span><span class="o">-></span><span class="n">ret</span> <span class="o">=</span> <span class="mi">0</span><span class="p">;</span>
<span class="nl">exit:</span>
<span class="n">data</span><span class="o">-></span><span class="n">finished</span> <span class="o">=</span> <span class="mi">1</span><span class="p">;</span>
<span class="k">return</span> <span class="o">&</span><span class="n">data</span><span class="o">-></span><span class="n">ret</span><span class="p">;</span>
<span class="p">}</span>
<span class="k">static</span> <span class="kt">int</span> <span class="nf">update_cb</span><span class="p">(</span><span class="k">const</span> <span class="kt">char</span> <span class="o">*</span><span class="n">refname</span><span class="p">,</span> <span class="k">const</span> <span class="n">git_oid</span> <span class="o">*</span><span class="n">a</span><span class="p">,</span> <span class="k">const</span> <span class="n">git_oid</span> <span class="o">*</span><span class="n">b</span><span class="p">,</span> <span class="kt">void</span> <span class="o">*</span><span class="n">data</span><span class="p">)</span>
<span class="p">{</span>
<span class="kt">char</span> <span class="n">a_str</span><span class="p">[</span><span class="n">GIT_OID_HEXSZ</span><span class="o">+</span><span class="mi">1</span><span class="p">],</span> <span class="n">b_str</span><span class="p">[</span><span class="n">GIT_OID_HEXSZ</span><span class="o">+</span><span class="mi">1</span><span class="p">];</span>
<span class="p">(</span><span class="kt">void</span><span class="p">)</span><span class="n">data</span><span class="p">;</span>
<span class="n"><a name="git_oid_fmt-1" class="fnlink" href="../../#HEAD/group/oid/git_oid_fmt">git_oid_fmt</a></span><span class="p">(</span><span class="n">b_str</span><span class="p">,</span> <span class="n">b</span><span class="p">);</span>
<span class="n">b_str</span><span class="p">[</span><span class="n">GIT_OID_HEXSZ</span><span class="p">]</span> <span class="o">=</span> <span class="sc">'\0'</span><span class="p">;</span>
<span class="k">if</span> <span class="p">(</span><span class="n"><a name="git_oid_iszero-3" class="fnlink" href="../../#HEAD/group/oid/git_oid_iszero">git_oid_iszero</a></span><span class="p">(</span><span class="n">a</span><span class="p">))</span> <span class="p">{</span>
<span class="n">printf</span><span class="p">(</span><span class="s">"[new] %.20s %s</span><span class="se">\n</span><span class="s">"</span><span class="p">,</span> <span class="n">b_str</span><span class="p">,</span> <span class="n">refname</span><span class="p">);</span>
<span class="p">}</span> <span class="k">else</span> <span class="p">{</span>
<span class="n"><a name="git_oid_fmt-2" class="fnlink" href="../../#HEAD/group/oid/git_oid_fmt">git_oid_fmt</a></span><span class="p">(</span><span class="n">a_str</span><span class="p">,</span> <span class="n">a</span><span class="p">);</span>
<span class="n">a_str</span><span class="p">[</span><span class="n">GIT_OID_HEXSZ</span><span class="p">]</span> <span class="o">=</span> <span class="sc">'\0'</span><span class="p">;</span>
<span class="n">printf</span><span class="p">(</span><span class="s">"[updated] %.10s..%.10s %s</span><span class="se">\n</span><span class="s">"</span><span class="p">,</span> <span class="n">a_str</span><span class="p">,</span> <span class="n">b_str</span><span class="p">,</span> <span class="n">refname</span><span class="p">);</span>
<span class="p">}</span>
<span class="k">return</span> <span class="mi">0</span><span class="p">;</span>
<span class="p">}</span>
<span class="kt">int</span> <span class="nf">fetch</span><span class="p">(</span><span class="n">git_repository</span> <span class="o">*</span><span class="n">repo</span><span class="p">,</span> <span class="kt">int</span> <span class="n">argc</span><span class="p">,</span> <span class="kt">char</span> <span class="o">**</span><span class="n">argv</span><span class="p">)</span>
<span class="p">{</span>
<span class="n">git_remote</span> <span class="o">*</span><span class="n">remote</span> <span class="o">=</span> <span class="nb">NULL</span><span class="p">;</span>
<span class="k">const</span> <span class="n">git_transfer_progress</span> <span class="o">*</span><span class="n">stats</span><span class="p">;</span>
<span class="k">struct</span> <span class="n">dl_data</span> <span class="n">data</span><span class="p">;</span>
<span class="n">git_remote_callbacks</span> <span class="n">callbacks</span> <span class="o">=</span> <span class="n">GIT_REMOTE_CALLBACKS_INIT</span><span class="p">;</span>
<span class="cp">#ifndef _WIN32</span>
<span class="n">pthread_t</span> <span class="n">worker</span><span class="p">;</span>
<span class="cp">#endif</span>
<span class="k">if</span> <span class="p">(</span><span class="n">argc</span> <span class="o"><</span> <span class="mi">2</span><span class="p">)</span> <span class="p">{</span>
<span class="n">fprintf</span><span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">"usage: %s fetch <repo></span><span class="se">\n</span><span class="s">"</span><span class="p">,</span> <span class="n">argv</span><span class="p">[</span><span class="o">-</span><span class="mi">1</span><span class="p">]);</span>
<span class="k">return</span> <span class="n">EXIT_FAILURE</span><span class="p">;</span>
<span class="p">}</span></pre></div>
</td>
</tr>
<tr id='section-4'>
<td class=docs>
<div class="pilwrap">
<a class="pilcrow" href="#section-4">¶</a>
</div>
<p>Figure out whether it’s a named remote or a URL</p>
</td>
<td class=code>
<div class='highlight'><pre> <span class="n">printf</span><span class="p">(</span><span class="s">"Fetching %s for repo %p</span><span class="se">\n</span><span class="s">"</span><span class="p">,</span> <span class="n">argv</span><span class="p">[</span><span class="mi">1</span><span class="p">],</span> <span class="n">repo</span><span class="p">);</span>
<span class="k">if</span> <span class="p">(</span><span class="n"><a name="git_remote_load-5" class="fnlink" href="../../#HEAD/group/remote/git_remote_load">git_remote_load</a></span><span class="p">(</span><span class="o">&</span><span class="n">remote</span><span class="p">,</span> <span class="n">repo</span><span class="p">,</span> <span class="n">argv</span><span class="p">[</span><span class="mi">1</span><span class="p">])</span> <span class="o"><</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span>
<span class="k">if</span> <span class="p">(</span><span class="n"><a name="git_remote_create_inmemory-4" class="fnlink" href="../../#HEAD/group/remote/git_remote_create_inmemory">git_remote_create_inmemory</a></span><span class="p">(</span><span class="o">&</span><span class="n">remote</span><span class="p">,</span> <span class="n">repo</span><span class="p">,</span> <span class="nb">NULL</span><span class="p">,</span> <span class="n">argv</span><span class="p">[</span><span class="mi">1</span><span class="p">])</span> <span class="o"><</span> <span class="mi">0</span><span class="p">)</span>
<span class="k">return</span> <span class="o">-</span><span class="mi">1</span><span class="p">;</span>
<span class="p">}</span></pre></div>
</td>
</tr>
<tr id='section-5'>
<td class=docs>
<div class="pilwrap">
<a class="pilcrow" href="#section-5">¶</a>
</div>
<p>Set up the callbacks (only update_tips for now)</p>
</td>
<td class=code>
<div class='highlight'><pre> <span class="n">callbacks</span><span class="p">.</span><span class="n">update_tips</span> <span class="o">=</span> <span class="o">&</span><span class="n">update_cb</span><span class="p">;</span>
<span class="n">callbacks</span><span class="p">.</span><span class="n">progress</span> <span class="o">=</span> <span class="o">&</span><span class="n">progress_cb</span><span class="p">;</span>
<span class="n"><a name="git_remote_set_callbacks-13" class="fnlink" href="../../#HEAD/group/remote/git_remote_set_callbacks">git_remote_set_callbacks</a></span><span class="p">(</span><span class="n">remote</span><span class="p">,</span> <span class="o">&</span><span class="n">callbacks</span><span class="p">);</span>
<span class="n"><a name="git_remote_set_cred_acquire_cb-12" class="fnlink" href="../../#HEAD/group/remote/git_remote_set_cred_acquire_cb">git_remote_set_cred_acquire_cb</a></span><span class="p">(</span><span class="n">remote</span><span class="p">,</span> <span class="o">&</span><span class="n">cred_acquire_cb</span><span class="p">,</span> <span class="nb">NULL</span><span class="p">);</span></pre></div>
</td>
</tr>
<tr id='section-6'>
<td class=docs>
<div class="pilwrap">
<a class="pilcrow" href="#section-6">¶</a>
</div>
<p>Set up the information for the background worker thread</p>
</td>
<td class=code>
<div class='highlight'><pre> <span class="n">data</span><span class="p">.</span><span class="n">remote</span> <span class="o">=</span> <span class="n">remote</span><span class="p">;</span>
<span class="n">data</span><span class="p">.</span><span class="n">ret</span> <span class="o">=</span> <span class="mi">0</span><span class="p">;</span>
<span class="n">data</span><span class="p">.</span><span class="n">finished</span> <span class="o">=</span> <span class="mi">0</span><span class="p">;</span>
<span class="n">stats</span> <span class="o">=</span> <span class="n"><a name="git_remote_stats-14" class="fnlink" href="../../#HEAD/group/remote/git_remote_stats">git_remote_stats</a></span><span class="p">(</span><span class="n">remote</span><span class="p">);</span>
<span class="cp">#ifdef _WIN32</span>
<span class="n">download</span><span class="p">(</span><span class="o">&</span><span class="n">data</span><span class="p">);</span>
<span class="cp">#else</span>
<span class="n">pthread_create</span><span class="p">(</span><span class="o">&</span><span class="n">worker</span><span class="p">,</span> <span class="nb">NULL</span><span class="p">,</span> <span class="n">download</span><span class="p">,</span> <span class="o">&</span><span class="n">data</span><span class="p">);</span></pre></div>
</td>
</tr>
<tr id='section-7'>
<td class=docs>
<div class="pilwrap">
<a class="pilcrow" href="#section-7">¶</a>
</div>
<p>Loop while the worker thread is still running. Here we show processed
and total objects in the pack and the amount of received
data. Most frontends will probably want to show a percentage and
the download rate.</p>
</td>
<td class=code>
<div class='highlight'><pre> <span class="k">do</span> <span class="p">{</span>
<span class="n">usleep</span><span class="p">(</span><span class="mi">10000</span><span class="p">);</span>
<span class="k">if</span> <span class="p">(</span><span class="n">stats</span><span class="o">-></span><span class="n">total_objects</span> <span class="o">></span> <span class="mi">0</span><span class="p">)</span>
<span class="n">printf</span><span class="p">(</span><span class="s">"Received %d/%d objects (%d) in %"</span> <span class="n">PRIuZ</span> <span class="s">" bytes</span><span class="se">\r</span><span class="s">"</span><span class="p">,</span>
<span class="n">stats</span><span class="o">-></span><span class="n">received_objects</span><span class="p">,</span> <span class="n">stats</span><span class="o">-></span><span class="n">total_objects</span><span class="p">,</span>
<span class="n">stats</span><span class="o">-></span><span class="n">indexed_objects</span><span class="p">,</span> <span class="n">stats</span><span class="o">-></span><span class="n">received_bytes</span><span class="p">);</span>
<span class="p">}</span> <span class="k">while</span> <span class="p">(</span><span class="o">!</span><span class="n">data</span><span class="p">.</span><span class="n">finished</span><span class="p">);</span>
<span class="k">if</span> <span class="p">(</span><span class="n">data</span><span class="p">.</span><span class="n">ret</span> <span class="o"><</span> <span class="mi">0</span><span class="p">)</span>
<span class="k">goto</span> <span class="n">on_error</span><span class="p">;</span>
<span class="n">pthread_join</span><span class="p">(</span><span class="n">worker</span><span class="p">,</span> <span class="nb">NULL</span><span class="p">);</span>
<span class="cp">#endif</span>
<span class="n">printf</span><span class="p">(</span><span class="s">"</span><span class="se">\r</span><span class="s">Received %d/%d objects in %zu bytes</span><span class="se">\n</span><span class="s">"</span><span class="p">,</span>
<span class="n">stats</span><span class="o">-></span><span class="n">indexed_objects</span><span class="p">,</span> <span class="n">stats</span><span class="o">-></span><span class="n">total_objects</span><span class="p">,</span> <span class="n">stats</span><span class="o">-></span><span class="n">received_bytes</span><span class="p">);</span></pre></div>
</td>
</tr>
<tr id='section-8'>
<td class=docs>
<div class="pilwrap">
<a class="pilcrow" href="#section-8">¶</a>
</div>
<p>Disconnect the underlying connection to prevent from idling.</p>
</td>
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<div class='highlight'><pre> <span class="n"><a name="git_remote_disconnect-8" class="fnlink" href="../../#HEAD/group/remote/git_remote_disconnect">git_remote_disconnect</a></span><span class="p">(</span><span class="n">remote</span><span class="p">);</span></pre></div>
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<p>Update the references in the remote’s namespace to point to the
right commits. This may be needed even if there was no packfile
to download, which can happen e.g. when the branches have been
changed but all the neede objects are available locally.</p>
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<div class='highlight'><pre> <span class="k">if</span> <span class="p">(</span><span class="n"><a name="git_remote_update_tips-11" class="fnlink" href="../../#HEAD/group/remote/git_remote_update_tips">git_remote_update_tips</a></span><span class="p">(</span><span class="n">remote</span><span class="p">)</span> <span class="o"><</span> <span class="mi">0</span><span class="p">)</span>
<span class="k">return</span> <span class="o">-</span><span class="mi">1</span><span class="p">;</span>
<span class="n"><a name="git_remote_free-9" class="fnlink" href="../../#HEAD/group/remote/git_remote_free">git_remote_free</a></span><span class="p">(</span><span class="n">remote</span><span class="p">);</span>
<span class="k">return</span> <span class="mi">0</span><span class="p">;</span>
<span class="nl">on_error:</span>
<span class="n"><a name="git_remote_free-10" class="fnlink" href="../../#HEAD/group/remote/git_remote_free">git_remote_free</a></span><span class="p">(</span><span class="n">remote</span><span class="p">);</span>
<span class="k">return</span> <span class="o">-</span><span class="mi">1</span><span class="p">;</span>
<span class="p">}</span></pre></div>
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