Introduce ts language module

pmd-cli/src/test/java/net/sourceforge/pmd/cli/CpdCliTest.java

@@ -206,7 +206,7 @@ class CpdCliTest extends BaseCliTest {
 
     @Test
     void jsShouldFindDuplicatesWithDifferentFileExtensions() throws Exception {
-        runCli(VIOLATIONS_FOUND, "--minimum-tokens", "5", "--language", "ecmascript",
+        runCli(VIOLATIONS_FOUND, "--minimum-tokens", "5", "--language", "ts",
                "-d", BASE_RES_PATH + "tsFiles/File1.ts", BASE_RES_PATH + "tsFiles/File2.ts")
             .checkStdOut(containsString("Found a 9 line (32 tokens) duplication in the following files"));
     }

pmd-javascript/src/main/java/net/sourceforge/pmd/lang/ecmascript/TsLanguageModule.java

@@ -0,0 +1,25 @@
+/**
+ * BSD-style license; for more info see http://pmd.sourceforge.net/license.html
+ */
+
+package net.sourceforge.pmd.lang.ecmascript;
+
+import net.sourceforge.pmd.cpd.Tokenizer;
+import net.sourceforge.pmd.lang.LanguagePropertyBundle;
+import net.sourceforge.pmd.lang.ecmascript.cpd.EcmascriptTokenizer;
+import net.sourceforge.pmd.lang.impl.CpdOnlyLanguageModuleBase;
+
+/**
+ * CPD only language to recognize TypeScript files.
+ */
+public class TsLanguageModule extends CpdOnlyLanguageModuleBase {
+
+    public TsLanguageModule() {
+        super(LanguageMetadata.withId("ts").name("TypeScript").extensions("ts"));
+    }
+
+    @Override
+    public Tokenizer createCpdTokenizer(LanguagePropertyBundle bundle) {
+        return new EcmascriptTokenizer();
+    }
+}

pmd-javascript/src/main/resources/META-INF/services/net.sourceforge.pmd.lang.Language

@@ -1 +1,2 @@
 net.sourceforge.pmd.lang.ecmascript.EcmascriptLanguageModule
+net.sourceforge.pmd.lang.ecmascript.TsLanguageModule