title: WiX Bundle with dynamic MsiPackage names
body: <p>I'm converting our current monolithic installer to use a WiX 3.7 Bundle/chain.  We have several components that are now building into their own separately-maintainable MSI installers.  My next task is to add all of these to a bootloader/bootchainer, but I've hit a snag.</p>
  
  <p>A requirement for our individual installers is that they contain the version in the filename (i.e. MyApplication-5.4.22.msi).  I don't see a tool like Heat for collecting MSI packages together, and I don't see a way to add an MsiPackage element with a wildcard to account for varying package names.</p>
  
  <p>As a last resort, I can wrap the bundler inside of another MSBuild script that will 'autocomplete' the filenames and pass the paths in as variables to the bundler.  I'm hoping someone can recommend a solution that works directly in the wxs or wixproj setting.</p>