Function getActivePluginPackages

tools/isobuild/compiler.js:866–922

(isopk, {
  uses,
  isopackCache,
  pluginProviderPackageNames,
  pluginProviderWatchSet
})

// takes an isopack and returns a list of packages isopack depends on,
// containing at least one plugin
export function getActivePluginPackages(isopk, {
  uses,
  isopackCache,
  pluginProviderPackageNames,
  pluginProviderWatchSet
}) {
  // XXX we used to include our own plugins only if we were the
  // "use" role. now we include them everywhere because we don't have
  // a special "use" role anymore. it's not totally clear to me what
  // the correct behavior should be -- we need to resolve whether we
  // think about plugins as being global to a package or particular
  // to a unibuild.

  // (there's also some weirdness here with handling implies, because
  // the implies field is on the target unibuild, but we really only care
  // about packages.)
  var activePluginPackages = [isopk];
  if (pluginProviderPackageNames) {
    pluginProviderPackageNames[isopk.name] = true;
  }

  // We don't use plugins from weak dependencies, because the ability
  // to compile a certain type of file shouldn't depend on whether or
  // not some unrelated package in the target has a dependency. And we
  // skip unordered dependencies, because it's not going to work to
  // have circular build-time dependencies.
  //
  // eachUsedUnibuild takes care of pulling in implied dependencies for us (eg,
  // templating from standard-app-packages).
  //
  // We pass archinfo.host here, not self.arch, because it may be more specific,
  // and because plugins always have to run on the host architecture.
  compiler.eachUsedUnibuild({
    dependencies: uses,
    arch: archinfo.host(),
    isopackCache: isopackCache,
    skipUnordered: true
    // implicitly skip weak deps by not specifying acceptableWeakPackages option
  }, function (unibuild) {
    if (unibuild.pkg.name === isopk.name) {
      return;
    }
    if (pluginProviderPackageNames) {
      pluginProviderPackageNames[unibuild.pkg.name] = true;
    }
    if (pluginProviderWatchSet) {
      pluginProviderWatchSet.merge(unibuild.pkg.pluginWatchSet);
    }
    if (_.isEmpty(unibuild.pkg.plugins)) {
      return;
    }
    activePluginPackages.push(unibuild.pkg);
  });

  activePluginPackages = _.uniq(activePluginPackages);
  return activePluginPackages;
}