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  <section id="git-commits-change-management">
<span id="create-commit"></span><h1>Git Commits &amp; Change Management<a class="headerlink" href="#git-commits-change-management" title="Link to this heading">¶</a></h1>
<aside class="sidebar">
<p class="sidebar-title">Create good commits!</p>
<ul class="simple">
<li><p><a class="reference external" href="https://www.conventionalcommits.org/">Conventional Commits</a></p></li>
<li><p><a class="reference external" href="https://wiki.openstack.org/wiki/GitCommitMessages#Structural_split_of_changes">Structural split of changes</a></p></li>
<li><p><a class="reference external" href="https://wiki.openstack.org/wiki/GitCommitMessages">Git Commit Good Practice</a></p></li>
</ul>
</aside>
<p>A commit and its commit message are among the most important information
available to a developer for bug fixing and further development.  A commit is a
change and changes have a context (a change request).</p>
<p>In a SCM system (git), the change history is derived from the commit history. A
commit message is therefore part of the documentation for change management and
thus elementary for the traceability of changes.</p>
<p><strong>What a commit is not</strong>: <em>A commit to an SCM system is not used to save files!</em></p>
<p>A commit should always have a context and the commit message describes what is
to be changed in that context, just as a function description should describe
what the intention and the goal of the function is, a commit message should
describe what the intention and the goal of that commit is.</p>
<p>The commit messages form the history and are the first and therefore most
important information a developer has when he has to research when and why a
change had to be made and how it was made (what the goal was).</p>
<p>Like any text, a commit message should be written for the reader and not from
the perspective of the author.</p>
<p>When scrolling through the history, the first thing one see is the title of the
commit message. Therefore the title should describe the change as briefly and
precisely as possible … followed by a blank line and then a somewhat detailed
description of the change.</p>
<hr class="docutils" />
<p>The follwing rules should be in mind, when creating a commit:</p>
<ul class="simple">
<li><p><strong>Commit history should be read like a history book.</strong></p></li>
<li><p><strong>Commit messages are for the reader not for the author of the commit.</strong></p></li>
<li><p><strong>A commit is the atomic code-modification of a change in change management.</strong></p></li>
<li><p><strong>Think about which descriptions from your PR might belong in the commit message.</strong></p></li>
<li><p><strong>The maximum line length in a commit message is 80 characters.</strong></p></li>
</ul>
<hr class="docutils" />
<p>Choose meaningful commit messages:</p>
<blockquote>
<div><div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="p">[</span><span class="nb">type</span><span class="p">]</span> <span class="n">optional</span> <span class="n">scope</span><span class="p">:</span> <span class="n">description</span>

<span class="p">[</span><span class="n">body</span><span class="p">]</span>

<span class="p">[</span><span class="n">optional</span> <span class="n">trailers</span><span class="p">]</span>
</pre></div>
</div>
</div></blockquote>
<dl class="simple">
<dt><code class="docutils literal notranslate"><span class="pre">[type]</span></code>:</dt><dd><p>Commits MUST be prefixed with a type .. <code class="docutils literal notranslate"><span class="pre">feat</span></code>, <code class="docutils literal notranslate"><span class="pre">fix</span></code>, <code class="docutils literal notranslate"><span class="pre">refactor</span></code>,
<code class="docutils literal notranslate"><span class="pre">mod</span></code>, <code class="docutils literal notranslate"><span class="pre">upd</span></code>, <code class="docutils literal notranslate"><span class="pre">doc</span></code>, <code class="docutils literal notranslate"><span class="pre">l10n</span></code>, <code class="docutils literal notranslate"><span class="pre">build</span></code> ..</p>
</dd>
<dt><code class="docutils literal notranslate"><span class="pre">[body]</span></code></dt><dd><p><a class="reference external" href="https://wiki.openstack.org/wiki/GitCommitMessages#Information_in_commit_messages">Information in commit messages</a></p>
</dd>
<dt><code class="docutils literal notranslate"><span class="pre">[optional</span> <span class="pre">trailers]</span></code>:</dt><dd><ul class="simple">
<li><p><a class="reference external" href="https://git-scm.com/docs/git-commit#Documentation/git-commit.txt-code--signoffcode">Signed-off-by</a>: certify that the committer has the rights to submit the
work under the project’s license.  That the developer has this right is a
prerequisite for a merge.  If the <a class="reference external" href="https://git-scm.com/docs/git-commit#Documentation/git-commit.txt-code--signoffcode">Signed-off-by</a> is not set in the
commit, the contributor enters his <cite>Developer’s Certificate of Origin</cite> at
the latest when creating a PR!</p></li>
<li><p>Closes: Link to the bug report or the bug number (e.g. <code class="docutils literal notranslate"><span class="pre">Closes:</span> <span class="pre">#10</span></code>)</p></li>
<li><p><a class="reference external" href="https://docs.github.com/en/pull-requests/committing-changes-to-your-project/creating-and-editing-commits/creating-a-commit-with-multiple-authors">Co-authored-by</a>: email address of the co-author</p></li>
<li><p>Reported-by: email address (if there is no bug report)</p></li>
<li><p>Suggested-by: email address (if there is no bug report)</p></li>
</ul>
</dd>
</dl>
<hr class="docutils" />
<p>To give examples at hand, here are a few commits.  Follow the links to see the
full commit messages:</p>
<dl class="simple">
<dt><a class="extlink-patch reference external" href="https://github.com/searxng/searxng/commit/44d941c93">#44d941c93</a></dt><dd><p><code class="docutils literal notranslate"><span class="pre">[fix]</span> <span class="pre">mojeek</span> <span class="pre">web</span> <span class="pre">engine:</span> <span class="pre">don't</span> <span class="pre">add</span> <span class="pre">empty</span> <span class="pre">fmt</span> <span class="pre">argument</span> <span class="pre">for</span> <span class="pre">web</span> <span class="pre">searches</span></code></p>
</dd>
<dt><a class="extlink-patch reference external" href="https://github.com/searxng/searxng/commit/feb15e387">#feb15e387</a></dt><dd><p><code class="docutils literal notranslate"><span class="pre">[fix]</span> <span class="pre">brave.news</span> <span class="pre">engine:</span> <span class="pre">response</span> <span class="pre">is</span> <span class="pre">HTML</span> <span class="pre">and</span> <span class="pre">no</span> <span class="pre">longer</span> <span class="pre">JSON</span></code></p>
</dd>
<dt><a class="extlink-patch reference external" href="https://github.com/searxng/searxng/commit/bdfe1c2a1">#bdfe1c2a1</a></dt><dd><p><code class="docutils literal notranslate"><span class="pre">[mod]</span> <span class="pre">engines:</span> <span class="pre">migration</span> <span class="pre">of</span> <span class="pre">the</span> <span class="pre">individual</span> <span class="pre">cache</span> <span class="pre">solutions</span> <span class="pre">to</span> <span class="pre">EngineCache</span></code></p>
</dd>
</dl>
</section>


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