actually extract .html.erb files

Author: erik-krogh

javascript/extractor/src/com/semmle/js/extractor/FileExtractor.java

@@ -104,7 +104,7 @@ private static int skipBOM(byte[] bytes, int length) {
 
   /** Information about supported file types. */
   public static enum FileType {
-    HTML(".htm", ".html", ".xhtm", ".xhtml", ".vue", ".hbs", ".ejs", ".njk", ".html.erb") {
+    HTML(".htm", ".html", ".xhtm", ".xhtml", ".vue", ".hbs", ".ejs", ".njk", ".erb") {
       @Override
       public IExtractor mkExtractor(ExtractorConfig config, ExtractorState state) {
         return new HTMLExtractor(config, state);
@@ -120,6 +120,12 @@ protected boolean contains(File f, String lcExt, ExtractorConfig config) {
         if (isBinaryFile(f, lcExt, config)) {
           return false;
         }
+        // for ERB files we are only interrested in `.html.erb` files
+        if (FileUtil.extension(f).equalsIgnoreCase(".erb")) {
+          if (!f.getName().endsWith(".html.erb")) {
+            return false;
+          }
+        }
         return super.contains(f, lcExt, config);
       }
     },
@@ -350,7 +356,7 @@ public static FileType forFile(File f, ExtractorConfig config) {
 
     /** Determine the {@link FileType} for a given file based on its extension only. */
     public static FileType forFileExtension(File f) {
-      String lcExt = StringUtil.lc(FileUtil.extension(f));
+      String lcExt = StringUtil.lc(FileUtil.extension(f)); // TODO: Here, it doesn't recognize .html.erb files
       for (FileType tp : values())
         if (tp.getExtensions().contains(lcExt)) {
           return tp;