scala support for ctags

Author: Lubos Kosco

src/org/opensolaris/opengrok/analysis/Ctags.java

@@ -93,6 +93,18 @@ private void initialize() throws IOException {
             command.add("--langmap=sql:+.pls"); // RFE #19208
             command.add("--langmap=sql:+.pld"); // RFE #19208
             command.add("--langmap=sql:+.pks"); // RFE #19208 ?
+            command.add("--langdef=scala"); // below is bug 61 to get full scala support
+            command.add("--langmap=scala:.scala");
+            command.add("--regex-scala=/^[ \t]*((abstract|final|sealed|implicit|lazy)[ \t]*)*(private|protected)?[ \t]*class[ \t]+([a-zA-Z0-9_]+)/\4/c,classes/");
+            command.add("--regex-scala=/^[ \t]*((abstract|final|sealed|implicit|lazy)[ \t]*)*(private|protected)?[ \t]*object[ \t]+([a-zA-Z0-9_]+)/\4/c,objects/");
+            command.add("--regex-scala=/^[ \t]*((abstract|final|sealed|implicit|lazy)[ \t]*)*(private|protected)?[ \t]*case class[ \t]+([a-zA-Z0-9_]+)/\4/c,case classes/");
+            command.add("--regex-scala=/^[ \t]*((abstract|final|sealed|implicit|lazy)[ \t]*)*(private|protected)?[ \t]*case object[ \t]+([a-zA-Z0-9_]+)/\4/c,case objects/");
+            command.add("--regex-scala=/^[ \t]*((abstract|final|sealed|implicit|lazy)[ \t]*)*(private|protected)?[ \t]*trait[ \t]+([a-zA-Z0-9_]+)/\4/t,traits/");
+            command.add("--regex-scala=/^[ \t]*type[ \t]+([a-zA-Z0-9_]+)/\1/T,types/");
+            command.add("--regex-scala=/^[ \t]*((abstract|final|sealed|implicit|lazy)[ \t]*)*def[ \t]+([a-zA-Z0-9_]+)/\3/m,methods/");
+            command.add("--regex-scala=/^[ \t]*((abstract|final|sealed|implicit|lazy)[ \t]*)*val[ \t]+([a-zA-Z0-9_]+)/\3/l,constants/");
+            command.add("--regex-scala=/^[ \t]*((abstract|final|sealed|implicit|lazy)[ \t]*)*var[ \t]+([a-zA-Z0-9_]+)/\3/l,variables/");
+            command.add("--regex-scala=/^[ \t]*package[ \t]+([a-zA-Z0-9_.]+)/\1/p,packages/");
 
             /* Add extra command line options for ctags. */
             if (CTagsExtraOptionsFile != null) {