title: RPM spec variable for (sub)package name?
body: <p>RPM spec files have many special variables available within them. Do any of these variables expose the name of the current package being processed?</p>
  
  <p>For single-package RPMs, the answer would be obvious, but a single spec can also produce multiple RPMs. Is there a variable, such as $RPM_PACKAGE_NAME, that rpmbuild automatically updates to align with the current %files or %pre or %post section?</p>