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// CodeMirror, copyright (c) by Marijn Haverbeke and others
// Distributed under an MIT license: http://codemirror.net/LICENSE

(function(mod) {
  if (typeof exports == "object" && typeof module == "object") // CommonJS
    mod(require("../../lib/codemirror"));
  else if (typeof define == "function" && define.amd) // AMD
    define(["../../lib/codemirror"], mod);
  else // Plain browser env
    mod(CodeMirror);
})(function(CodeMirror) {
"use strict";

CodeMirror.defineMode('shell', function() {

  var words = {};
  function define(style, string) {
    var split = string.split(' ');
    for(var i = 0; i < split.length; i++) {
      words[split[i]] = style;
    }
  };

  // Atoms
  define('atom', 'true false');

  // Keywords
  define('keyword', 'if then do else elif while until for in esac fi fin ' +
    'fil done exit set unset export function');

  // Commands
  define('builtin', 'ab awk bash beep cat cc cd chown chmod chroot clear cp ' +
    'curl cut diff echo find gawk gcc get git grep hg kill killall ln ls make ' +
    'mkdir openssl mv nc node npm ping ps restart rm rmdir sed service sh ' +
    'shopt shred source sort sleep ssh start stop su sudo svn tee telnet top ' +
    'touch vi vim wall wc wget who write yes zsh');

  function tokenBase(stream, state) {
    if (stream.eatSpace()) return null;

    var sol = stream.sol();
    var ch = stream.next();

    if (ch === '\\') {
      stream.next();
      return null;
    }
    if (ch === '\'' || ch === '"' || ch === '`') {
      state.tokens.unshift(tokenString(ch, ch === "`" ? "quote" : "string"));
      return tokenize(stream, state);
    }
    if (ch === '#') {
      if (sol && stream.eat('!')) {
        stream.skipToEnd();
        return 'meta'; // 'comment'?
      }
      stream.skipToEnd();
      return 'comment';
    }
    if (ch === '$') {
      state.tokens.unshift(tokenDollar);
      return tokenize(stream, state);
    }
    if (ch === '+' || ch === '=') {
      return 'operator';
    }
    if (ch === '-') {
      stream.eat('-');
      stream.eatWhile(/\w/);
      return 'attribute';
    }
    if (/\d/.test(ch)) {
      stream.eatWhile(/\d/);
      if(stream.eol() || !/\w/.test(stream.peek())) {
        return 'number';
      }
    }
    stream.eatWhile(/[\w-]/);
    var cur = stream.current();
    if (stream.peek() === '=' && /\w+/.test(cur)) return 'def';
    return words.hasOwnProperty(cur) ? words[cur] : null;
  }

  function tokenString(quote, style) {
    var close = quote == "(" ? ")" : quote == "{" ? "}" : quote
    return function(stream, state) {
      var next, escaped = false;
      while ((next = stream.next()) != null) {
        if (next === close && !escaped) {
          state.tokens.shift();
          break;
        } else if (next === '$' && !escaped && quote !== "'" && stream.peek() != close) {