<p>Invoking <code>%__scm_setup_$__scm</code> <em>without</em> looking at option <code>-S</code> in the specfile, but taking the current definition of <code>%__scm</code> into account, permits dynamic selection of the SCM on the commandline</p>

<pre><code>   rpmbuild --define="__scm SCM"
</code></pre>

<p>Default SCM <code>patch</code> already has a convenient <code>%__scm_setup_patch %{nil}</code> definition.</p>

<p>Tested with rpmbuild 4.13, git, svn, ... on Linux Mint 17.2.</p>

<hr>

<h4>You can view, comment on, or merge this pull request online at:</h4>
<p>  <a href='https://github.com/rpm-software-management/rpm/pull/56'>https://github.com/rpm-software-management/rpm/pull/56</a></p>

<h4>Commit Summary</h4>
<ul>
  <li>Permit dynamic selection of SCM.</li>
</ul>

<h4>File Changes</h4>
<ul>
  <li>
    <strong>M</strong>
    <a href="https://github.com/rpm-software-management/rpm/pull/56/files#diff-0">macros.in</a>
    (2)
  </li>
</ul>

<h4>Patch Links:</h4>
<ul>
  <li><a href='https://github.com/rpm-software-management/rpm/pull/56.patch'>https://github.com/rpm-software-management/rpm/pull/56.patch</a></li>
  <li><a href='https://github.com/rpm-software-management/rpm/pull/56.diff'>https://github.com/rpm-software-management/rpm/pull/56.diff</a></li>
</ul>

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