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<body class="article">
<div id="header">
<h1>merge API</h1>
<span id="revdate"></span>
</div>
<div id="content">
<div id="preamble">
<div class="sectionbody">
<div class="paragraph"><p>The merge API helps a program to reconcile two competing sets of
improvements to some files (e.g., unregistered changes from the work
tree versus changes involved in switching to a new branch), reporting
conflicts if found.  The library called through this API is
responsible for a few things.</p></div>
<div class="ulist"><ul>
<li>
<p>
determining which trees to merge (recursive ancestor consolidation);
</p>
</li>
<li>
<p>
lining up corresponding files in the trees to be merged (rename
   detection, subtree shifting), reporting edge cases like add/add
   and rename/rename conflicts to the user;
</p>
</li>
<li>
<p>
performing a three-way merge of corresponding files, taking
   path-specific merge drivers (specified in <code>.gitattributes</code>)
   into account.
</p>
</li>
</ul></div>
</div>
</div>
<div class="sect1">
<h2 id="_data_structures">Data structures</h2>
<div class="sectionbody">
<div class="ulist"><ul>
<li>
<p>
<code>mmbuffer_t</code>, <code>mmfile_t</code>
</p>
</li>
</ul></div>
<div class="paragraph"><p>These store data usable for use by the xdiff backend, for writing and
for reading, respectively.  See <code>xdiff/xdiff.h</code> for the definitions
and <code>diff.c</code> for examples.</p></div>
<div class="ulist"><ul>
<li>
<p>
<code>struct ll_merge_options</code>
</p>
</li>
</ul></div>
<div class="paragraph"><p>Check merge-ll.h for details.</p></div>
</div>
</div>
<div class="sect1">
<h2 id="_low_level_single_file_merge">Low-level (single file) merge</h2>
<div class="sectionbody">
<div class="paragraph"><p>Check merge-ll.h for details.</p></div>
</div>
</div>
</div>
<div id="footnotes"><hr /></div>
<div id="footer">
<div id="footer-text">
Last updated
 2025-06-13 22:14:31 UTC
</div>
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