Added Support for Apache PIG Scripts

Author: Krishna Bhushan Koneru

js/background.js

@@ -50,6 +50,7 @@
     ocaml:       ['ml'],
     perl:        ['pl', 'pm', 'perl'],
     php:         ['php', 'phtml', 'phps'],
+    pig:         ['pig'],
     powershell:  ['ps1', 'psm1'],
     python:      ['py', 'pyc'],
     r:           ['r'],

js/languages/pig.js

@@ -0,0 +1,39 @@
+/*
+Language: pig
+Author: Krishna Koneru <[email protected]>
+Category: common
+*/
+
+hljs.registerLanguage('pig', function(hljs) {
+  var APOS_STRING = {
+    className: 'string',
+    begin: /'/, end: /'/
+  };
+  var PIG_KEYWORDS = {
+    keyword: 'SPLIT BY LOAD STORE DUMP UNION PARALLEL FILTER FOREACH FLATTEN ' +
+    'GENERATE ILLUSTRATE DESCRIBE GROUP COGROUP JOIN LIMIT SAMPLE STREAM DEFINE DISTINCT ' +
+    'AND OR NOT COUNT BY AS SUM ALL BY USING INNER LEFT RIGHT FULL OUTER ASC DESC INTO IF ' +
+    'THROUGH ORDER INPUT OUTPUT CACHE AVG CONCAT COUNT_STAR DIFF TOKENIZE REPLACE TRIM OTHERWISE ' +
+    'MAX MIN SIZE is IS not matches group TOBAG using as %declare %default DIFF describe define double dump',
+    constant: 'null NULL',
+    typename: 'int float double chararray bytearray tuple bag map',
+    built_in: 'BinStorage PigStorage PigDump TextLoader IsEmpty ls cd cat pwd help ' +
+    'copyFromLocal copyToLocal cp mkdir mv rm rmf exec run kill quit Register declare ' +
+    'default REGISTER SET set ToDate AddDuration du'
+  };
+  return {
+    aliases: ['pig'],
+    keywords: PIG_KEYWORDS,
+    contains: [
+      hljs.C_LINE_COMMENT_MODE,
+      hljs.C_BLOCK_COMMENT_MODE,
+      hljs.COMMENT('--', '$'),
+      hljs.NUMBER_MODE,
+      {
+        className: 'decorator',
+        begin: /%/
+      },
+      APOS_STRING
+    ]
+  };
+})