// TODO: unload src libs when not used anymore,
// especially: old versions
static Map<File, hotwire_srcLibsMap_Cached> hotwire_srcLibsMap = syncMap();

srecord hotwire_srcLibsMap_Cached(ClassLoader classLoader, S jname) {}

sbool hotwire_verboseLinking;

static JavaXClassLoader hotwire_makeClassLoader_stickyAndSrcLibs(L<File> files) {
  new L<File> files2;
  new Map<S, ClassLoader> parents; // key = package/class name
  for (File f : files) {
    S libID = DiskSnippetCache_fileToLibID(f);
    if (libID != null && isStickyLibrary(libID)) {
      if (addLibrary(libID))
        print("Retaining sticky library " + libID);
    } else if (f != first(files) && isMarkedAsSrcLib(libID = isFile(f) ? loadTextFileFromZip(f, "progID") : null)) {
      hotwire_srcLibsMap_Cached cached = hotwire_srcLibsMap.get(f);
      if (cached == null) {
        print("Hotwiring src lib " + libID + " / " + f);
        S jname = dropSuffix(".java", getJavaSrcNameOfSrcLib(libID));
        assertNempty(libID, jname);
        Class cc = hotwireSpecialMainClass(libID, jname.replace("/", ".");
        setCreatorTo(cc, mc());
        cached = hotwire_srcLibsMap_Cached(cc.getClassLoader(), jname);
        hotwire_srcLibsMap.put(f, cached);
      }
      S pkg = beforeSlash(cached.jname);
      if (hotwire_verboseLinking)
        print("Linking src lib " + libID + " as " + pkg);
      parents.put(pkg, cached.classLoader);
    } else
      files2.add(f);
  }

  JavaXClassLoaderWithParents cl = new(null, files2, myClassLoader()); // progID is set later
  putAll(cl.parentMap, parents);
  ret cl;
}

Began life as a copy of #1016216