add node_modules to address #4364

1 files changed, 3586 insertions, 0 deletions

diff --git a/node_modules/jade/jade.js b/node_modules/jade/jade.js
new file mode 100644
index 000000000..1983a2039
--- /dev/null
+++ b/node_modules/jade/jade.js
@@ -0,0 +1,3586 @@
+(function() {
+
+// CommonJS require()
+
+function require(p){
+    var path = require.resolve(p)
+      , mod = require.modules[path];
+    if (!mod) throw new Error('failed to require "' + p + '"');
+    if (!mod.exports) {
+      mod.exports = {};
+      mod.call(mod.exports, mod, mod.exports, require.relative(path));
+    }
+    return mod.exports;
+  }
+
+require.modules = {};
+
+require.resolve = function (path){
+    var orig = path
+      , reg = path + '.js'
+      , index = path + '/index.js';
+    return require.modules[reg] && reg
+      || require.modules[index] && index
+      || orig;
+  };
+
+require.register = function (path, fn){
+    require.modules[path] = fn;
+  };
+
+require.relative = function (parent) {
+    return function(p){
+      if ('.' != p.charAt(0)) return require(p);
+      
+      var path = parent.split('/')
+        , segs = p.split('/');
+      path.pop();
+      
+      for (var i = 0; i < segs.length; i++) {
+        var seg = segs[i];
+        if ('..' == seg) path.pop();
+        else if ('.' != seg) path.push(seg);
+      }
+
+      return require(path.join('/'));
+    };
+  };
+
+
+require.register("compiler.js", function(module, exports, require){
+
+/*!
+ * Jade - Compiler
+ * Copyright(c) 2010 TJ Holowaychuk <tj@vision-media.ca>
+ * MIT Licensed
+ */
+
+/**
+ * Module dependencies.
+ */
+
+var nodes = require('./nodes')
+  , filters = require('./filters')
+  , doctypes = require('./doctypes')
+  , selfClosing = require('./self-closing')
+  , runtime = require('./runtime')
+  , utils = require('./utils');
+
+
+ if (!Object.keys) {
+   Object.keys = function(obj){
+     var arr = [];
+     for (var key in obj) {
+       if (obj.hasOwnProperty(key)) {
+         arr.push(key);
+       }
+     }
+     return arr;
+   }
+ }
+
+ if (!String.prototype.trimLeft) {
+   String.prototype.trimLeft = function(){
+     return this.replace(/^\s+/, '');
+   }
+ }
+
+
+
+/**
+ * Initialize `Compiler` with the given `node`.
+ *
+ * @param {Node} node
+ * @param {Object} options
+ * @api public
+ */
+
+var Compiler = module.exports = function Compiler(node, options) {
+  this.options = options = options || {};
+  this.node = node;
+  this.hasCompiledDoctype = false;
+  this.hasCompiledTag = false;
+  this.pp = options.pretty || false;
+  this.debug = false !== options.compileDebug;
+  this.indents = 0;
+  this.parentIndents = 0;
+  if (options.doctype) this.setDoctype(options.doctype);
+};
+
+/**
+ * Compiler prototype.
+ */
+
+Compiler.prototype = {
+
+  /**
+   * Compile parse tree to JavaScript.
+   *
+   * @api public
+   */
+
+  compile: function(){
+    this.buf = ['var interp;'];
+    if (this.pp) this.buf.push("var __indent = [];");
+    this.lastBufferedIdx = -1;
+    this.visit(this.node);
+    return this.buf.join('\n');
+  },
+
+  /**
+   * Sets the default doctype `name`. Sets terse mode to `true` when
+   * html 5 is used, causing self-closing tags to end with ">" vs "/>",
+   * and boolean attributes are not mirrored.
+   *
+   * @param {string} name
+   * @api public
+   */
+
+  setDoctype: function(name){
+    var doctype = doctypes[(name || 'default').toLowerCase()];
+    doctype = doctype || '<!DOCTYPE ' + name + '>';
+    this.doctype = doctype;
+    this.terse = '5' == name || 'html' == name;
+    this.xml = 0 == this.doctype.indexOf('<?xml');
+  },
+
+  /**
+   * Buffer the given `str` optionally escaped.
+   *
+   * @param {String} str
+   * @param {Boolean} esc
+   * @api public
+   */
+
+  buffer: function(str, esc){
+    if (esc) str = utils.escape(str);
+
+    if (this.lastBufferedIdx == this.buf.length) {
+      this.lastBuffered += str;
+      this.buf[this.lastBufferedIdx - 1] = "buf.push('" + this.lastBuffered + "');"
+    } else {
+      this.buf.push("buf.push('" + str + "');");
+      this.lastBuffered = str;
+      this.lastBufferedIdx = this.buf.length;
+    }
+  },
+
+  /**
+   * Buffer an indent based on the current `indent`
+   * property and an additional `offset`.
+   *
+   * @param {Number} offset
+   * @param {Boolean} newline
+   * @api public
+   */
+  
+  prettyIndent: function(offset, newline){
+    offset = offset || 0;
+    newline = newline ? '\\n' : '';
+    this.buffer(newline + Array(this.indents + offset).join('  '));
+    if (this.parentIndents)
+      this.buf.push("buf.push.apply(buf, __indent);");
+  },
+
+  /**
+   * Visit `node`.
+   *
+   * @param {Node} node
+   * @api public
+   */
+
+  visit: function(node){
+    var debug = this.debug;
+
+    if (debug) {
+      this.buf.push('__jade.unshift({ lineno: ' + node.line
+        + ', filename: ' + (node.filename
+          ? JSON.stringify(node.filename)
+          : '__jade[0].filename')
+        + ' });');
+    }
+
+    // Massive hack to fix our context
+    // stack for - else[ if] etc
+    if (false === node.debug && this.debug) {
+      this.buf.pop();
+      this.buf.pop();
+    }
+
+    this.visitNode(node);
+
+    if (debug) this.buf.push('__jade.shift();');
+  },
+
+  /**
+   * Visit `node`.
+   *
+   * @param {Node} node
+   * @api public
+   */
+
+  visitNode: function(node){
+    var name = node.constructor.name
+      || node.constructor.toString().match(/function ([^(\s]+)()/)[1];
+    return this['visit' + name](node);
+  },
+
+  /**
+   * Visit case `node`.
+   *
+   * @param {Literal} node
+   * @api public
+   */
+
+  visitCase: function(node){
+    var _ = this.withinCase;
+    this.withinCase = true;
+    this.buf.push('switch (' + node.expr + '){');
+    this.visit(node.block);
+    this.buf.push('}');
+    this.withinCase = _;
+  },
+
+  /**
+   * Visit when `node`.
+   *
+   * @param {Literal} node
+   * @api public
+   */
+
+  visitWhen: function(node){
+    if ('default' == node.expr) {
+      this.buf.push('default:');
+    } else {
+      this.buf.push('case ' + node.expr + ':');
+    }
+    this.visit(node.block);
+    this.buf.push('  break;');
+  },
+
+  /**
+   * Visit literal `node`.
+   *
+   * @param {Literal} node
+   * @api public
+   */
+
+  visitLiteral: function(node){
+    var str = node.str.replace(/\n/g, '\\\\n');
+    this.buffer(str);
+  },
+
+  /**
+   * Visit all nodes in `block`.
+   *
+   * @param {Block} block
+   * @api public
+   */
+
+  visitBlock: function(block){
+    var len = block.nodes.length
+      , escape = this.escape
+      , pp = this.pp
+    
+    // Block keyword has a special meaning in mixins
+    if (this.parentIndents && block.mode) {
+      if (pp) this.buf.push("__indent.push('" + Array(this.indents + 1).join('  ') + "');")
+      this.buf.push('block && block();');
+      if (pp) this.buf.push("__indent.pop();")
+      return;
+    }
+    
+    // Pretty print multi-line text
+    if (pp && len > 1 && !escape && block.nodes[0].isText && block.nodes[1].isText)
+      this.prettyIndent(1, true);
+    
+    for (var i = 0; i < len; ++i) {
+      // Pretty print text
+      if (pp && i > 0 && !escape && block.nodes[i].isText && block.nodes[i-1].isText)
+        this.prettyIndent(1, false);
+      
+      this.visit(block.nodes[i]);
+      // Multiple text nodes are separated by newlines
+      if (block.nodes[i+1] && block.nodes[i].isText && block.nodes[i+1].isText)
+        this.buffer('\\n');
+    }
+  },
+
+  /**
+   * Visit `doctype`. Sets terse mode to `true` when html 5
+   * is used, causing self-closing tags to end with ">" vs "/>",
+   * and boolean attributes are not mirrored.
+   *
+   * @param {Doctype} doctype
+   * @api public
+   */
+
+  visitDoctype: function(doctype){
+    if (doctype && (doctype.val || !this.doctype)) {
+      this.setDoctype(doctype.val || 'default');
+    }
+
+    if (this.doctype) this.buffer(this.doctype);
+    this.hasCompiledDoctype = true;
+  },
+
+  /**
+   * Visit `mixin`, generating a function that
+   * may be called within the template.
+   *
+   * @param {Mixin} mixin
+   * @api public
+   */
+
+  visitMixin: function(mixin){
+    var name = mixin.name.replace(/-/g, '_') + '_mixin'
+      , args = mixin.args || ''
+      , block = mixin.block
+      , attrs = mixin.attrs
+      , pp = this.pp;
+
+    if (mixin.call) {
+      if (pp) this.buf.push("__indent.push('" + Array(this.indents + 1).join('  ') + "');")
+      if (block || attrs.length) {
+        
+        this.buf.push(name + '.call({');
+        
+        if (block) {
+          this.buf.push('block: function(){');
+          
+          // Render block with no indents, dynamically added when rendered
+          this.parentIndents++;
+          var _indents = this.indents;
+          this.indents = 0;
+          this.visit(mixin.block);
+          this.indents = _indents;
+          this.parentIndents--;
+          
+          if (attrs.length) {
+            this.buf.push('},');
+          } else {
+            this.buf.push('}');
+          }
+        }
+        
+        if (attrs.length) {
+          var val = this.attrs(attrs);
+          if (val.inherits) {
+            this.buf.push('attributes: merge({' + val.buf
+                + '}, attributes), escaped: merge(' + val.escaped + ', escaped, true)');
+          } else {
+            this.buf.push('attributes: {' + val.buf + '}, escaped: ' + val.escaped);
+          }
+        }
+        
+        if (args) {
+          this.buf.push('}, ' + args + ');');
+        } else {
+          this.buf.push('});');
+        }
+        
+      } else {
+        this.buf.push(name + '(' + args + ');');
+      }
+      if (pp) this.buf.push("__indent.pop();")
+    } else {
+      this.buf.push('var ' + name + ' = function(' + args + '){');
+      this.buf.push('var block = this.block, attributes = this.attributes || {}, escaped = this.escaped || {};');
+      this.parentIndents++;
+      this.visit(block);
+      this.parentIndents--;
+      this.buf.push('};');
+    }
+  },
+
+  /**
+   * Visit `tag` buffering tag markup, generating
+   * attributes, visiting the `tag`'s code and block.
+   *
+   * @param {Tag} tag
+   * @api public
+   */
+
+  visitTag: function(tag){
+    this.indents++;
+    var name = tag.name
+      , pp = this.pp;
+
+    if (tag.buffer) name = "' + (" + name + ") + '";
+
+    if (!this.hasCompiledTag) {
+      if (!this.hasCompiledDoctype && 'html' == name) {
+        this.visitDoctype();
+      }
+      this.hasCompiledTag = true;
+    }
+
+    // pretty print
+    if (pp && !tag.isInline())
+      this.prettyIndent(0, true);
+
+    if ((~selfClosing.indexOf(name) || tag.selfClosing) && !this.xml) {
+      this.buffer('<' + name);
+      this.visitAttributes(tag.attrs);
+      this.terse
+        ? this.buffer('>')
+        : this.buffer('/>');
+    } else {
+      // Optimize attributes buffering
+      if (tag.attrs.length) {
+        this.buffer('<' + name);
+        if (tag.attrs.length) this.visitAttributes(tag.attrs);
+        this.buffer('>');
+      } else {
+        this.buffer('<' + name + '>');
+      }
+      if (tag.code) this.visitCode(tag.code);
+      this.escape = 'pre' == tag.name;
+      this.visit(tag.block);
+
+      // pretty print
+      if (pp && !tag.isInline() && 'pre' != tag.name && !tag.canInline())
+        this.prettyIndent(0, true);
+
+      this.buffer('</' + name + '>');
+    }
+    this.indents--;
+  },
+
+  /**
+   * Visit `filter`, throwing when the filter does not exist.
+   *
+   * @param {Filter} filter
+   * @api public
+   */
+
+  visitFilter: function(filter){
+    var fn = filters[filter.name];
+
+    // unknown filter
+    if (!fn) {
+      if (filter.isASTFilter) {
+        throw new Error('unknown ast filter "' + filter.name + ':"');
+      } else {
+        throw new Error('unknown filter ":' + filter.name + '"');
+      }
+    }
+
+    if (filter.isASTFilter) {
+      this.buf.push(fn(filter.block, this, filter.attrs));
+    } else {
+      var text = filter.block.nodes.map(function(node){ return node.val }).join('\n');
+      filter.attrs = filter.attrs || {};
+      filter.attrs.filename = this.options.filename;
+      this.buffer(utils.text(fn(text, filter.attrs)));
+    }
+  },
+
+  /**
+   * Visit `text` node.
+   *
+   * @param {Text} text
+   * @api public
+   */
+
+  visitText: function(text){
+    text = utils.text(text.val.replace(/\\/g, '\\\\'));
+    if (this.escape) text = escape(text);
+    this.buffer(text);
+  },
+
+  /**
+   * Visit a `comment`, only buffering when the buffer flag is set.
+   *
+   * @param {Comment} comment
+   * @api public
+   */
+
+  visitComment: function(comment){
+    if (!comment.buffer) return;
+    if (this.pp) this.prettyIndent(1, true);
+    this.buffer('<!--' + utils.escape(comment.val) + '-->');
+  },
+
+  /**
+   * Visit a `BlockComment`.
+   *
+   * @param {Comment} comment
+   * @api public
+   */
+
+  visitBlockComment: function(comment){
+    if (!comment.buffer) return;
+    if (0 == comment.val.trim().indexOf('if')) {
+      this.buffer('<!--[' + comment.val.trim() + ']>');
+      this.visit(comment.block);
+      this.buffer('<![endif]-->');
+    } else {
+      this.buffer('<!--' + comment.val);
+      this.visit(comment.block);
+      this.buffer('-->');
+    }
+  },
+
+  /**
+   * Visit `code`, respecting buffer / escape flags.
+   * If the code is followed by a block, wrap it in
+   * a self-calling function.
+   *
+   * @param {Code} code
+   * @api public
+   */
+
+  visitCode: function(code){
+    // Wrap code blocks with {}.
+    // we only wrap unbuffered code blocks ATM
+    // since they are usually flow control
+
+    // Buffer code
+    if (code.buffer) {
+      var val = code.val.trimLeft();
+      this.buf.push('var __val__ = ' + val);
+      val = 'null == __val__ ? "" : __val__';
+      if (code.escape) val = 'escape(' + val + ')';
+      this.buf.push("buf.push(" + val + ");");
+    } else {
+      this.buf.push(code.val);
+    }
+
+    // Block support
+    if (code.block) {
+      if (!code.buffer) this.buf.push('{');
+      this.visit(code.block);
+      if (!code.buffer) this.buf.push('}');
+    }
+  },
+
+  /**
+   * Visit `each` block.
+   *
+   * @param {Each} each
+   * @api public
+   */
+
+  visitEach: function(each){
+    this.buf.push(''
+      + '// iterate ' + each.obj + '\n'
+      + ';(function(){\n'
+      + '  if (\'number\' == typeof ' + each.obj + '.length) {\n'
+      + '    for (var ' + each.key + ' = 0, $$l = ' + each.obj + '.length; ' + each.key + ' < $$l; ' + each.key + '++) {\n'
+      + '      var ' + each.val + ' = ' + each.obj + '[' + each.key + '];\n');
+
+    this.visit(each.block);
+
+    this.buf.push(''
+      + '    }\n'
+      + '  } else {\n'
+      + '    for (var ' + each.key + ' in ' + each.obj + ') {\n'
+       + '      if (' + each.obj + '.hasOwnProperty(' + each.key + ')){'
+      + '      var ' + each.val + ' = ' + each.obj + '[' + each.key + '];\n');
+
+    this.visit(each.block);
+
+     this.buf.push('      }\n');
+
+    this.buf.push('   }\n  }\n}).call(this);\n');
+  },
+
+  /**
+   * Visit `attrs`.
+   *
+   * @param {Array} attrs
+   * @api public
+   */
+
+  visitAttributes: function(attrs){
+    var val = this.attrs(attrs);
+    if (val.inherits) {
+      this.buf.push("buf.push(attrs(merge({ " + val.buf +
+          " }, attributes), merge(" + val.escaped + ", escaped, true)));");
+    } else if (val.constant) {
+      eval('var buf={' + val.buf + '};');
+      this.buffer(runtime.attrs(buf, JSON.parse(val.escaped)), true);
+    } else {
+      this.buf.push("buf.push(attrs({ " + val.buf + " }, " + val.escaped + "));");
+    }
+  },
+
+  /**
+   * Compile attributes.
+   */
+
+  attrs: function(attrs){
+    var buf = []
+      , classes = []
+      , escaped = {}
+      , constant = attrs.every(function(attr){ return isConstant(attr.val) })
+      , inherits = false;
+
+    if (this.terse) buf.push('terse: true');
+
+    attrs.forEach(function(attr){
+      if (attr.name == 'attributes') return inherits = true;
+      escaped[attr.name] = attr.escaped;
+      if (attr.name == 'class') {
+        classes.push('(' + attr.val + ')');
+      } else {
+        var pair = "'" + attr.name + "':(" + attr.val + ')';
+        buf.push(pair);
+      }
+    });
+
+    if (classes.length) {
+      classes = classes.join(" + ' ' + ");
+      buf.push("class: " + classes);
+    }
+
+    return {
+      buf: buf.join(', ').replace('class:', '"class":'),
+      escaped: JSON.stringify(escaped),
+      inherits: inherits,
+      constant: constant
+    };
+  }
+};
+
+/**
+ * Check if expression can be evaluated to a constant
+ *
+ * @param {String} expression
+ * @return {Boolean}
+ * @api private
+ */
+
+function isConstant(val){
+  // Check strings/literals
+  if (/^ *("([^"\\]*(\\.[^"\\]*)*)"|'([^'\\]*(\\.[^'\\]*)*)'|true|false|null|undefined) *$/i.test(val))
+    return true;
+  
+  // Check numbers
+  if (!isNaN(Number(val)))
+    return true;
+  
+  // Check arrays
+  var matches;
+  if (matches = /^ *\[(.*)\] *$/.exec(val))
+    return matches[1].split(',').every(isConstant);
+  
+  return false;
+}
+
+/**
+ * Escape the given string of `html`.
+ *
+ * @param {String} html
+ * @return {String}
+ * @api private
+ */
+
+function escape(html){
+  return String(html)
+    .replace(/&(?!\w+;)/g, '&amp;')
+    .replace(/</g, '&lt;')
+    .replace(/>/g, '&gt;')
+    .replace(/"/g, '&quot;');
+}
+}); // module: compiler.js
+
+require.register("doctypes.js", function(module, exports, require){
+
+/*!
+ * Jade - doctypes
+ * Copyright(c) 2010 TJ Holowaychuk <tj@vision-media.ca>
+ * MIT Licensed
+ */
+
+module.exports = {
+    '5': '<!DOCTYPE html>'
+  , 'default': '<!DOCTYPE html>'
+  , 'xml': '<?xml version="1.0" encoding="utf-8" ?>'
+  , 'transitional': '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">'
+  , 'strict': '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">'
+  , 'frameset': '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Frameset//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-frameset.dtd">'
+  , '1.1': '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">'
+  , 'basic': '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML Basic 1.1//EN" "http://www.w3.org/TR/xhtml-basic/xhtml-basic11.dtd">'
+  , 'mobile': '<!DOCTYPE html PUBLIC "-//WAPFORUM//DTD XHTML Mobile 1.2//EN" "http://www.openmobilealliance.org/tech/DTD/xhtml-mobile12.dtd">'
+};
+}); // module: doctypes.js
+
+require.register("filters.js", function(module, exports, require){
+
+/*!
+ * Jade - filters
+ * Copyright(c) 2010 TJ Holowaychuk <tj@vision-media.ca>
+ * MIT Licensed
+ */
+
+module.exports = {
+  
+  /**
+   * Wrap text with CDATA block.
+   */
+  
+  cdata: function(str){
+    return '<![CDATA[\\n' + str + '\\n]]>';
+  },
+  
+  /**
+   * Transform sass to css, wrapped in style tags.
+   */
+  
+  sass: function(str){
+    str = str.replace(/\\n/g, '\n');
+    var sass = require('sass').render(str).replace(/\n/g, '\\n');
+    return '<style type="text/css">' + sass + '</style>'; 
+  },
+  
+  /**
+   * Transform stylus to css, wrapped in style tags.
+   */
+  
+  stylus: function(str, options){
+    var ret;
+    str = str.replace(/\\n/g, '\n');
+    var stylus = require('stylus');
+    stylus(str, options).render(function(err, css){
+      if (err) throw err;
+      ret = css.replace(/\n/g, '\\n');
+    });
+    return '<style type="text/css">' + ret + '</style>'; 
+  },
+  
+  /**
+   * Transform less to css, wrapped in style tags.
+   */
+  
+  less: function(str){
+    var ret;
+    str = str.replace(/\\n/g, '\n');
+    require('less').render(str, function(err, css){
+      if (err) throw err;
+      ret = '<style type="text/css">' + css.replace(/\n/g, '\\n') + '</style>';  
+    });
+    return ret;
+  },
+  
+  /**
+   * Transform markdown to html.
+   */
+  
+  markdown: function(str){
+    var md;
+
+    // support markdown / discount
+    try {
+      md = require('markdown');
+    } catch (err){
+      try {
+        md = require('discount');
+      } catch (err) {
+        try {
+          md = require('markdown-js');
+        } catch (err) {
+          try {
+            md = require('marked');
+          } catch (err) {
+            throw new
+              Error('Cannot find markdown library, install markdown, discount, or marked.');
+          }
+        }
+      }
+    }
+
+    str = str.replace(/\\n/g, '\n');
+    return md.parse(str).replace(/\n/g, '\\n').replace(/'/g,'&#39;');
+  },
+  
+  /**
+   * Transform coffeescript to javascript.
+   */
+
+  coffeescript: function(str){
+    str = str.replace(/\\n/g, '\n');
+    var js = require('coffee-script').compile(str).replace(/\\/g, '\\\\').replace(/\n/g, '\\n');
+    return '<script type="text/javascript">\\n' + js + '</script>';
+  }
+};
+
+}); // module: filters.js
+
+require.register("inline-tags.js", function(module, exports, require){
+
+/*!
+ * Jade - inline tags
+ * Copyright(c) 2010 TJ Holowaychuk <tj@vision-media.ca>
+ * MIT Licensed
+ */
+
+module.exports = [
+    'a'
+  , 'abbr'
+  , 'acronym'
+  , 'b'
+  , 'br'
+  , 'code'
+  , 'em'
+  , 'font'
+  , 'i'
+  , 'img'
+  , 'ins'
+  , 'kbd'
+  , 'map'
+  , 'samp'
+  , 'small'
+  , 'span'
+  , 'strong'
+  , 'sub'
+  , 'sup'
+];
+}); // module: inline-tags.js
+
+require.register("jade.js", function(module, exports, require){
+/*!
+ * Jade
+ * Copyright(c) 2010 TJ Holowaychuk <tj@vision-media.ca>
+ * MIT Licensed
+ */
+
+/**
+ * Module dependencies.
+ */
+
+var Parser = require('./parser')
+  , Lexer = require('./lexer')
+  , Compiler = require('./compiler')
+  , runtime = require('./runtime')
+
+/**
+ * Library version.
+ */
+
+exports.version = '0.26.1';
+
+/**
+ * Expose self closing tags.
+ */
+
+exports.selfClosing = require('./self-closing');
+
+/**
+ * Default supported doctypes.
+ */
+
+exports.doctypes = require('./doctypes');
+
+/**
+ * Text filters.
+ */
+
+exports.filters = require('./filters');
+
+/**
+ * Utilities.
+ */
+
+exports.utils = require('./utils');
+
+/**
+ * Expose `Compiler`.
+ */
+
+exports.Compiler = Compiler;
+
+/**
+ * Expose `Parser`.
+ */
+
+exports.Parser = Parser;
+
+/**
+ * Expose `Lexer`.
+ */
+
+exports.Lexer = Lexer;
+
+/**
+ * Nodes.
+ */
+
+exports.nodes = require('./nodes');
+
+/**
+ * Jade runtime helpers.
+ */
+
+exports.runtime = runtime;
+
+/**
+ * Template function cache.
+ */
+
+exports.cache = {};
+
+/**
+ * Parse the given `str` of jade and return a function body.
+ *
+ * @param {String} str
+ * @param {Object} options
+ * @return {String}
+ * @api private
+ */
+
+function parse(str, options){
+  try {
+    // Parse
+    var parser = new Parser(str, options.filename, options);
+
+    // Compile
+    var compiler = new (options.compiler || Compiler)(parser.parse(), options)
+      , js = compiler.compile();
+
+    // Debug compiler
+    if (options.debug) {
+      console.error('\nCompiled Function:\n\n\033[90m%s\033[0m', js.replace(/^/gm, '  '));
+    }
+
+    return ''
+      + 'var buf = [];\n'
+      + (options.self
+        ? 'var self = locals || {};\n' + js
+        : 'with (locals || {}) {\n' + js + '\n}\n')
+      + 'return buf.join("");';
+  } catch (err) {
+    parser = parser.context();
+    runtime.rethrow(err, parser.filename, parser.lexer.lineno);
+  }
+}
+
+/**
+ * Compile a `Function` representation of the given jade `str`.
+ *
+ * Options:
+ *
+ *   - `compileDebug` when `false` debugging code is stripped from the compiled template
+ *   - `client` when `true` the helper functions `escape()` etc will reference `jade.escape()`
+ *      for use with the Jade client-side runtime.js
+ *
+ * @param {String} str
+ * @param {Options} options
+ * @return {Function}
+ * @api public
+ */
+
+exports.compile = function(str, options){
+  var options = options || {}
+    , client = options.client
+    , filename = options.filename
+      ? JSON.stringify(options.filename)
+      : 'undefined'
+    , fn;
+
+  if (options.compileDebug !== false) {
+    fn = [
+        'var __jade = [{ lineno: 1, filename: ' + filename + ' }];'
+      , 'try {'
+      , parse(String(str), options)
+      , '} catch (err) {'
+      , '  rethrow(err, __jade[0].filename, __jade[0].lineno);'
+      , '}'
+    ].join('\n');
+  } else {
+    fn = parse(String(str), options);
+  }
+
+  if (client) {
+    fn = 'attrs = attrs || jade.attrs; escape = escape || jade.escape; rethrow = rethrow || jade.rethrow; merge = merge || jade.merge;\n' + fn;
+  }
+
+  fn = new Function('locals, attrs, escape, rethrow, merge', fn);
+
+  if (client) return fn;
+
+  return function(locals){
+    return fn(locals, runtime.attrs, runtime.escape, runtime.rethrow, runtime.merge);
+  };
+};
+
+/**
+ * Render the given `str` of jade and invoke
+ * the callback `fn(err, str)`.
+ *
+ * Options:
+ *
+ *   - `cache` enable template caching
+ *   - `filename` filename required for `include` / `extends` and caching
+ *
+ * @param {String} str
+ * @param {Object|Function} options or fn
+ * @param {Function} fn
+ * @api public
+ */
+
+exports.render = function(str, options, fn){
+  // swap args
+  if ('function' == typeof options) {
+    fn = options, options = {};
+  }
+
+  // cache requires .filename
+  if (options.cache && !options.filename) {
+    return fn(new Error('the "filename" option is required for caching'));
+  }
+
+  try {
+    var path = options.filename;
+    var tmpl = options.cache
+      ? exports.cache[path] || (exports.cache[path] = exports.compile(str, options))
+      : exports.compile(str, options);
+    fn(null, tmpl(options));
+  } catch (err) {
+    fn(err);
+  }
+};
+
+/**
+ * Render a Jade file at the given `path` and callback `fn(err, str)`.
+ *
+ * @param {String} path
+ * @param {Object|Function} options or callback
+ * @param {Function} fn
+ * @api public
+ */
+
+exports.renderFile = function(path, options, fn){
+  var key = path + ':string';
+
+  if ('function' == typeof options) {
+    fn = options, options = {};
+  }
+
+  try {
+    options.filename = path;
+    var str = options.cache
+      ? exports.cache[key] || (exports.cache[key] = fs.readFileSync(path, 'utf8'))
+      : fs.readFileSync(path, 'utf8');
+    exports.render(str, options, fn);
+  } catch (err) {
+    fn(err);
+  }
+};
+
+/**
+ * Express support.
+ */
+
+exports.__express = exports.renderFile;
+
+}); // module: jade.js
+
+require.register("lexer.js", function(module, exports, require){
+
+/*!
+ * Jade - Lexer
+ * Copyright(c) 2010 TJ Holowaychuk <tj@vision-media.ca>
+ * MIT Licensed
+ */
+
+/**
+ * Initialize `Lexer` with the given `str`.
+ *
+ * Options:
+ *
+ *   - `colons` allow colons for attr delimiters
+ *
+ * @param {String} str
+ * @param {Object} options
+ * @api private
+ */
+
+var Lexer = module.exports = function Lexer(str, options) {
+  options = options || {};
+  this.input = str.replace(/\r\n|\r/g, '\n');
+  this.colons = options.colons;
+  this.deferredTokens = [];
+  this.lastIndents = 0;
+  this.lineno = 1;
+  this.stash = [];
+  this.indentStack = [];
+  this.indentRe = null;
+  this.pipeless = false;
+};
+
+/**
+ * Lexer prototype.
+ */
+
+Lexer.prototype = {
+  
+  /**
+   * Construct a token with the given `type` and `val`.
+   *
+   * @param {String} type
+   * @param {String} val
+   * @return {Object}
+   * @api private
+   */
+  
+  tok: function(type, val){
+    return {
+        type: type
+      , line: this.lineno
+      , val: val
+    }
+  },
+  
+  /**
+   * Consume the given `len` of input.
+   *
+   * @param {Number} len
+   * @api private
+   */
+  
+  consume: function(len){
+    this.input = this.input.substr(len);
+  },
+  
+  /**
+   * Scan for `type` with the given `regexp`.
+   *
+   * @param {String} type
+   * @param {RegExp} regexp
+   * @return {Object}
+   * @api private
+   */
+  
+  scan: function(regexp, type){
+    var captures;
+    if (captures = regexp.exec(this.input)) {
+      this.consume(captures[0].length);
+      return this.tok(type, captures[1]);
+    }
+  },
+  
+  /**
+   * Defer the given `tok`.
+   *
+   * @param {Object} tok
+   * @api private
+   */
+  
+  defer: function(tok){
+    this.deferredTokens.push(tok);
+  },
+  
+  /**
+   * Lookahead `n` tokens.
+   *
+   * @param {Number} n
+   * @return {Object}
+   * @api private
+   */
+  
+  lookahead: function(n){
+    var fetch = n - this.stash.length;
+    while (fetch-- > 0) this.stash.push(this.next());
+    return this.stash[--n];
+  },
+  
+  /**
+   * Return the indexOf `start` / `end` delimiters.
+   *
+   * @param {String} start
+   * @param {String} end
+   * @return {Number}
+   * @api private
+   */
+  
+  indexOfDelimiters: function(start, end){
+    var str = this.input
+      , nstart = 0
+      , nend = 0
+      , pos = 0;
+    for (var i = 0, len = str.length; i < len; ++i) {
+      if (start == str.charAt(i)) {
+        ++nstart;
+      } else if (end == str.charAt(i)) {
+        if (++nend == nstart) {
+          pos = i;
+          break;
+        }
+      }
+    }
+    return pos;
+  },
+  
+  /**
+   * Stashed token.
+   */
+  
+  stashed: function() {
+    return this.stash.length
+      && this.stash.shift();
+  },
+  
+  /**
+   * Deferred token.
+   */
+  
+  deferred: function() {
+    return this.deferredTokens.length 
+      && this.deferredTokens.shift();
+  },
+  
+  /**
+   * end-of-source.
+   */
+  
+  eos: function() {
+    if (this.input.length) return;
+    if (this.indentStack.length) {
+      this.indentStack.shift();
+      return this.tok('outdent');
+    } else {
+      return this.tok('eos');
+    }
+  },
+
+  /**
+   * Blank line.
+   */
+  
+  blank: function() {
+    var captures;
+    if (captures = /^\n *\n/.exec(this.input)) {
+      this.consume(captures[0].length - 1);
+      if (this.pipeless) return this.tok('text', '');
+      return this.next();
+    }
+  },
+
+  /**
+   * Comment.
+   */
+  
+  comment: function() {
+    var captures;
+    if (captures = /^ *\/\/(-)?([^\n]*)/.exec(this.input)) {
+      this.consume(captures[0].length);
+      var tok = this.tok('comment', captures[2]);
+      tok.buffer = '-' != captures[1];
+      return tok;
+    }
+  },
+
+  /**
+   * Interpolated tag.
+   */
+
+  interpolation: function() {
+    var captures;
+    if (captures = /^#\{(.*?)\}/.exec(this.input)) {
+      this.consume(captures[0].length);
+      return this.tok('interpolation', captures[1]);
+    }
+  },
+
+  /**
+   * Tag.
+   */
+  
+  tag: function() {
+    var captures;
+    if (captures = /^(\w[-:\w]*)(\/?)/.exec(this.input)) {
+      this.consume(captures[0].length);
+      var tok, name = captures[1];
+      if (':' == name[name.length - 1]) {
+        name = name.slice(0, -1);
+        tok = this.tok('tag', name);
+        this.defer(this.tok(':'));
+        while (' ' == this.input[0]) this.input = this.input.substr(1);
+      } else {
+        tok = this.tok('tag', name);
+      }
+      tok.selfClosing = !! captures[2];
+      return tok;
+    }
+  },
+  
+  /**
+   * Filter.
+   */
+  
+  filter: function() {
+    return this.scan(/^:(\w+)/, 'filter');
+  },
+  
+  /**
+   * Doctype.
+   */
+  
+  doctype: function() {
+    return this.scan(/^(?:!!!|doctype) *([^\n]+)?/, 'doctype');
+  },
+
+  /**
+   * Id.
+   */
+  
+  id: function() {
+    return this.scan(/^#([\w-]+)/, 'id');
+  },
+  
+  /**
+   * Class.
+   */
+  
+  className: function() {
+    return this.scan(/^\.([\w-]+)/, 'class');
+  },
+  
+  /**
+   * Text.
+   */
+  
+  text: function() {
+    return this.scan(/^(?:\| ?| ?)?([^\n]+)/, 'text');
+  },
+
+  /**
+   * Extends.
+   */
+  
+  "extends": function() {
+    return this.scan(/^extends? +([^\n]+)/, 'extends');
+  },
+
+  /**
+   * Block prepend.
+   */
+  
+  prepend: function() {
+    var captures;
+    if (captures = /^prepend +([^\n]+)/.exec(this.input)) {
+      this.consume(captures[0].length);
+      var mode = 'prepend'
+        , name = captures[1]
+        , tok = this.tok('block', name);
+      tok.mode = mode;
+      return tok;
+    }
+  },
+  
+  /**
+   * Block append.
+   */
+  
+  append: function() {
+    var captures;
+    if (captures = /^append +([^\n]+)/.exec(this.input)) {
+      this.consume(captures[0].length);
+      var mode = 'append'
+        , name = captures[1]
+        , tok = this.tok('block', name);
+      tok.mode = mode;
+      return tok;
+    }
+  },
+
+  /**
+   * Block.
+   */
+  
+  block: function() {
+    var captures;
+    if (captures = /^block\b *(?:(prepend|append) +)?([^\n]*)/.exec(this.input)) {
+      this.consume(captures[0].length);
+      var mode = captures[1] || 'replace'
+        , name = captures[2]
+        , tok = this.tok('block', name);
+
+      tok.mode = mode;
+      return tok;
+    }
+  },
+
+  /**
+   * Yield.
+   */
+  
+  yield: function() {
+    return this.scan(/^yield */, 'yield');
+  },
+
+  /**
+   * Include.
+   */
+  
+  include: function() {
+    return this.scan(/^include +([^\n]+)/, 'include');
+  },
+
+  /**
+   * Case.
+   */
+  
+  "case": function() {
+    return this.scan(/^case +([^\n]+)/, 'case');
+  },
+
+  /**
+   * When.
+   */
+  
+  when: function() {
+    return this.scan(/^when +([^:\n]+)/, 'when');
+  },
+
+  /**
+   * Default.
+   */
+  
+  "default": function() {
+    return this.scan(/^default */, 'default');
+  },
+
+  /**
+   * Assignment.
+   */
+  
+  assignment: function() {
+    var captures;
+    if (captures = /^(\w+) += *([^;\n]+)( *;? *)/.exec(this.input)) {
+      this.consume(captures[0].length);
+      var name = captures[1]
+        , val = captures[2];
+      return this.tok('code', 'var ' + name + ' = (' + val + ');');
+    }
+  },
+
+  /**
+   * Call mixin.
+   */
+  
+  call: function(){
+    var captures;
+    if (captures = /^\+([-\w]+)/.exec(this.input)) {
+      this.consume(captures[0].length);
+      var tok = this.tok('call', captures[1]);
+      
+      // Check for args (not attributes)
+      if (captures = /^ *\((.*?)\)/.exec(this.input)) {
+        if (!/^ *[-\w]+ *=/.test(captures[1])) {
+          this.consume(captures[0].length);
+          tok.args = captures[1];
+        }
+      }
+      
+      return tok;
+    }
+  },
+
+  /**
+   * Mixin.
+   */
+
+  mixin: function(){
+    var captures;
+    if (captures = /^mixin +([-\w]+)(?: *\((.*)\))?/.exec(this.input)) {
+      this.consume(captures[0].length);
+      var tok = this.tok('mixin', captures[1]);
+      tok.args = captures[2];
+      return tok;
+    }
+  },
+
+  /**
+   * Conditional.
+   */
+  
+  conditional: function() {
+    var captures;
+    if (captures = /^(if|unless|else if|else)\b([^\n]*)/.exec(this.input)) {
+      this.consume(captures[0].length);
+      var type = captures[1]
+        , js = captures[2];
+
+      switch (type) {
+        case 'if': js = 'if (' + js + ')'; break;
+        case 'unless': js = 'if (!(' + js + '))'; break;
+        case 'else if': js = 'else if (' + js + ')'; break;
+        case 'else': js = 'else'; break;
+      }
+
+      return this.tok('code', js);
+    }
+  },
+
+  /**
+   * While.
+   */
+  
+  "while": function() {
+    var captures;
+    if (captures = /^while +([^\n]+)/.exec(this.input)) {
+      this.consume(captures[0].length);
+      return this.tok('code', 'while (' + captures[1] + ')');
+    }
+  },
+
+  /**
+   * Each.
+   */
+  
+  each: function() {
+    var captures;
+    if (captures = /^(?:- *)?(?:each|for) +(\w+)(?: *, *(\w+))? * in *([^\n]+)/.exec(this.input)) {
+      this.consume(captures[0].length);
+      var tok = this.tok('each', captures[1]);
+      tok.key = captures[2] || '$index';
+      tok.code = captures[3];
+      return tok;
+    }
+  },
+  
+  /**
+   * Code.
+   */
+  
+  code: function() {
+    var captures;
+    if (captures = /^(!?=|-)([^\n]+)/.exec(this.input)) {
+      this.consume(captures[0].length);
+      var flags = captures[1];
+      captures[1] = captures[2];
+      var tok = this.tok('code', captures[1]);
+      tok.escape = flags[0] === '=';
+      tok.buffer = flags[0] === '=' || flags[1] === '=';
+      return tok;
+    }
+  },
+  
+  /**
+   * Attributes.
+   */
+  
+  attrs: function() {
+    if ('(' == this.input.charAt(0)) {
+      var index = this.indexOfDelimiters('(', ')')
+        , str = this.input.substr(1, index-1)
+        , tok = this.tok('attrs')
+        , len = str.length
+        , colons = this.colons
+        , states = ['key']
+        , escapedAttr
+        , key = ''
+        , val = ''
+        , quote
+        , c
+        , p;
+
+      function state(){
+        return states[states.length - 1];
+      }
+
+      function interpolate(attr) {
+        return attr.replace(/#\{([^}]+)\}/g, function(_, expr){
+          return quote + " + (" + expr + ") + " + quote;
+        });
+      }
+
+      this.consume(index + 1);
+      tok.attrs = {};
+      tok.escaped = {};
+
+      function parse(c) {
+        var real = c;
+        // TODO: remove when people fix ":"
+        if (colons && ':' == c) c = '=';
+        switch (c) {
+          case ',':
+          case '\n':
+            switch (state()) {
+              case 'expr':
+              case 'array':
+              case 'string':
+              case 'object':
+                val += c;
+                break;
+              default:
+                states.push('key');
+                val = val.trim();
+                key = key.trim();
+                if ('' == key) return;
+                key = key.replace(/^['"]|['"]$/g, '').replace('!', '');
+                tok.escaped[key] = escapedAttr;
+                tok.attrs[key] = '' == val
+                  ? true
+                  : interpolate(val);
+                key = val = '';
+            }
+            break;
+          case '=':
+            switch (state()) {
+              case 'key char':
+                key += real;
+                break;
+              case 'val':
+              case 'expr':
+              case 'array':
+              case 'string':
+              case 'object':
+                val += real;
+                break;
+              default:
+                escapedAttr = '!' != p;
+                states.push('val');
+            }
+            break;
+          case '(':
+            if ('val' == state()
+              || 'expr' == state()) states.push('expr');
+            val += c;
+            break;
+          case ')':
+            if ('expr' == state()
+              || 'val' == state()) states.pop();
+            val += c;
+            break;
+          case '{':
+            if ('val' == state()) states.push('object');
+            val += c;
+            break;
+          case '}':
+            if ('object' == state()) states.pop();
+            val += c;
+            break;
+          case '[':
+            if ('val' == state()) states.push('array');
+            val += c;
+            break;
+          case ']':
+            if ('array' == state()) states.pop();
+            val += c;
+            break;
+          case '"':
+          case "'":
+            switch (state()) {
+              case 'key':
+                states.push('key char');
+                break;
+              case 'key char':
+                states.pop();
+                break;
+              case 'string':
+                if (c == quote) states.pop();
+                val += c;
+                break;
+              default:
+                states.push('string');
+                val += c;
+                quote = c;
+            }
+            break;
+          case '':
+            break;
+          default:
+            switch (state()) {
+              case 'key':
+              case 'key char':
+                key += c;
+                break;
+              default:
+                val += c;
+            }
+        }
+        p = c;
+      }
+
+      for (var i = 0; i < len; ++i) {
+        parse(str.charAt(i));
+      }
+
+      parse(',');
+
+      if ('/' == this.input.charAt(0)) {
+        this.consume(1);
+        tok.selfClosing = true;
+      }
+
+      return tok;
+    }
+  },
+  
+  /**
+   * Indent | Outdent | Newline.
+   */
+  
+  indent: function() {
+    var captures, re;
+
+    // established regexp
+    if (this.indentRe) {
+      captures = this.indentRe.exec(this.input);
+    // determine regexp
+    } else {
+      // tabs
+      re = /^\n(\t*) */;
+      captures = re.exec(this.input);
+
+      // spaces
+      if (captures && !captures[1].length) {
+        re = /^\n( *)/;
+        captures = re.exec(this.input);
+      }
+
+      // established
+      if (captures && captures[1].length) this.indentRe = re;
+    }
+
+    if (captures) {
+      var tok
+        , indents = captures[1].length;
+
+      ++this.lineno;
+      this.consume(indents + 1);
+
+      if (' ' == this.input[0] || '\t' == this.input[0]) {
+        throw new Error('Invalid indentation, you can use tabs or spaces but not both');
+      }
+
+      // blank line
+      if ('\n' == this.input[0]) return this.tok('newline');
+
+      // outdent
+      if (this.indentStack.length && indents < this.indentStack[0]) {
+        while (this.indentStack.length && this.indentStack[0] > indents) {
+          this.stash.push(this.tok('outdent'));
+          this.indentStack.shift();
+        }
+        tok = this.stash.pop();
+      // indent
+      } else if (indents && indents != this.indentStack[0]) {
+        this.indentStack.unshift(indents);
+        tok = this.tok('indent', indents);
+      // newline
+      } else {
+        tok = this.tok('newline');
+      }
+
+      return tok;
+    }
+  },
+
+  /**
+   * Pipe-less text consumed only when 
+   * pipeless is true;
+   */
+
+  pipelessText: function() {
+    if (this.pipeless) {
+      if ('\n' == this.input[0]) return;
+      var i = this.input.indexOf('\n');
+      if (-1 == i) i = this.input.length;
+      var str = this.input.substr(0, i);
+      this.consume(str.length);
+      return this.tok('text', str);
+    }
+  },
+
+  /**
+   * ':'
+   */
+
+  colon: function() {
+    return this.scan(/^: */, ':');
+  },
+
+  /**
+   * Return the next token object, or those
+   * previously stashed by lookahead.
+   *
+   * @return {Object}
+   * @api private
+   */
+  
+  advance: function(){
+    return this.stashed()
+      || this.next();
+  },
+  
+  /**
+   * Return the next token object.
+   *
+   * @return {Object}
+   * @api private
+   */
+  
+  next: function() {
+    return this.deferred()
+      || this.blank()
+      || this.eos()
+      || this.pipelessText()
+      || this.yield()
+      || this.doctype()
+      || this.interpolation()
+      || this["case"]()
+      || this.when()
+      || this["default"]()
+      || this["extends"]()
+      || this.append()
+      || this.prepend()
+      || this.block()
+      || this.include()
+      || this.mixin()
+      || this.call()
+      || this.conditional()
+      || this.each()
+      || this["while"]()
+      || this.assignment()
+      || this.tag()
+      || this.filter()
+      || this.code()
+      || this.id()
+      || this.className()
+      || this.attrs()
+      || this.indent()
+      || this.comment()
+      || this.colon()
+      || this.text();
+  }
+};
+
+}); // module: lexer.js
+
+require.register("nodes/attrs.js", function(module, exports, require){
+
+/*!
+ * Jade - nodes - Attrs
+ * Copyright(c) 2010 TJ Holowaychuk <tj@vision-media.ca>
+ * MIT Licensed
+ */
+
+/**
+ * Module dependencies.
+ */
+
+var Node = require('./node'),
+    Block = require('./block');
+
+/**
+ * Initialize a `Attrs` node.
+ *
+ * @api public
+ */
+
+var Attrs = module.exports = function Attrs() {
+  this.attrs = [];
+};
+
+/**
+ * Inherit from `Node`.
+ */
+
+Attrs.prototype = new Node;
+Attrs.prototype.constructor = Attrs;
+
+
+/**
+ * Set attribute `name` to `val`, keep in mind these become
+ * part of a raw js object literal, so to quote a value you must
+ * '"quote me"', otherwise or example 'user.name' is literal JavaScript.
+ *
+ * @param {String} name
+ * @param {String} val
+ * @param {Boolean} escaped
+ * @return {Tag} for chaining
+ * @api public
+ */
+
+Attrs.prototype.setAttribute = function(name, val, escaped){
+  this.attrs.push({ name: name, val: val, escaped: escaped });
+  return this;
+};
+
+/**
+ * Remove attribute `name` when present.
+ *
+ * @param {String} name
+ * @api public
+ */
+
+Attrs.prototype.removeAttribute = function(name){
+  for (var i = 0, len = this.attrs.length; i < len; ++i) {
+    if (this.attrs[i] && this.attrs[i].name == name) {
+      delete this.attrs[i];
+    }
+  }
+};
+
+/**
+ * Get attribute value by `name`.
+ *
+ * @param {String} name
+ * @return {String}
+ * @api public
+ */
+
+Attrs.prototype.getAttribute = function(name){
+  for (var i = 0, len = this.attrs.length; i < len; ++i) {
+    if (this.attrs[i] && this.attrs[i].name == name) {
+      return this.attrs[i].val;
+    }
+  }
+};
+
+}); // module: nodes/attrs.js
+
+require.register("nodes/block-comment.js", function(module, exports, require){
+
+/*!
+ * Jade - nodes - BlockComment
+ * Copyright(c) 2010 TJ Holowaychuk <tj@vision-media.ca>
+ * MIT Licensed
+ */
+
+/**
+ * Module dependencies.
+ */
+
+var Node = require('./node');
+
+/**
+ * Initialize a `BlockComment` with the given `block`.
+ *
+ * @param {String} val
+ * @param {Block} block
+ * @param {Boolean} buffer
+ * @api public
+ */
+
+var BlockComment = module.exports = function BlockComment(val, block, buffer) {
+  this.block = block;
+  this.val = val;
+  this.buffer = buffer;
+};
+
+/**
+ * Inherit from `Node`.
+ */
+
+BlockComment.prototype = new Node;
+BlockComment.prototype.constructor = BlockComment;
+
+}); // module: nodes/block-comment.js
+
+require.register("nodes/block.js", function(module, exports, require){
+
+/*!
+ * Jade - nodes - Block
+ * Copyright(c) 2010 TJ Holowaychuk <tj@vision-media.ca>
+ * MIT Licensed
+ */
+
+/**
+ * Module dependencies.
+ */
+
+var Node = require('./node');
+
+/**
+ * Initialize a new `Block` with an optional `node`.
+ *
+ * @param {Node} node
+ * @api public
+ */
+
+var Block = module.exports = function Block(node){
+  this.nodes = [];
+  if (node) this.push(node);
+};
+
+/**
+ * Inherit from `Node`.
+ */
+
+Block.prototype = new Node;
+Block.prototype.constructor = Block;
+
+
+/**
+ * Block flag.
+ */
+
+Block.prototype.isBlock = true;
+
+/**
+ * Replace the nodes in `other` with the nodes
+ * in `this` block.
+ *
+ * @param {Block} other
+ * @api private
+ */
+
+Block.prototype.replace = function(other){
+  other.nodes = this.nodes;
+};
+
+/**
+ * Pust the given `node`.
+ *
+ * @param {Node} node
+ * @return {Number}
+ * @api public
+ */
+
+Block.prototype.push = function(node){
+  return this.nodes.push(node);
+};
+
+/**
+ * Check if this block is empty.
+ *
+ * @return {Boolean}
+ * @api public
+ */
+
+Block.prototype.isEmpty = function(){
+  return 0 == this.nodes.length;
+};
+
+/**
+ * Unshift the given `node`.
+ *
+ * @param {Node} node
+ * @return {Number}
+ * @api public
+ */
+
+Block.prototype.unshift = function(node){
+  return this.nodes.unshift(node);
+};
+
+/**
+ * Return the "last" block, or the first `yield` node.
+ *
+ * @return {Block}
+ * @api private
+ */
+
+Block.prototype.includeBlock = function(){
+  var ret = this
+    , node;
+
+  for (var i = 0, len = this.nodes.length; i < len; ++i) {
+    node = this.nodes[i];
+    if (node.yield) return node;
+    else if (node.textOnly) continue;
+    else if (node.includeBlock) ret = node.includeBlock();
+    else if (node.block && !node.block.isEmpty()) ret = node.block.includeBlock();
+  }
+
+  return ret;
+};
+
+/**
+ * Return a clone of this block.
+ *
+ * @return {Block}
+ * @api private
+ */
+
+Block.prototype.clone = function(){
+  var clone = new Block;
+  for (var i = 0, len = this.nodes.length; i < len; ++i) {
+    clone.push(this.nodes[i].clone());
+  }
+  return clone;
+};
+
+
+}); // module: nodes/block.js
+
+require.register("nodes/case.js", function(module, exports, require){
+
+/*!
+ * Jade - nodes - Case
+ * Copyright(c) 2010 TJ Holowaychuk <tj@vision-media.ca>
+ * MIT Licensed
+ */
+
+/**
+ * Module dependencies.
+ */
+
+var Node = require('./node');
+
+/**
+ * Initialize a new `Case` with `expr`.
+ *
+ * @param {String} expr
+ * @api public
+ */
+
+var Case = exports = module.exports = function Case(expr, block){
+  this.expr = expr;
+  this.block = block;
+};
+
+/**
+ * Inherit from `Node`.
+ */
+
+Case.prototype = new Node;
+Case.prototype.constructor = Case;
+
+
+var When = exports.When = function When(expr, block){
+  this.expr = expr;
+  this.block = block;
+  this.debug = false;
+};
+
+/**
+ * Inherit from `Node`.
+ */
+
+When.prototype = new Node;
+When.prototype.constructor = When;
+
+
+
+}); // module: nodes/case.js
+
+require.register("nodes/code.js", function(module, exports, require){
+
+/*!
+ * Jade - nodes - Code
+ * Copyright(c) 2010 TJ Holowaychuk <tj@vision-media.ca>
+ * MIT Licensed
+ */
+
+/**
+ * Module dependencies.
+ */
+
+var Node = require('./node');
+
+/**
+ * Initialize a `Code` node with the given code `val`.
+ * Code may also be optionally buffered and escaped.
+ *
+ * @param {String} val
+ * @param {Boolean} buffer
+ * @param {Boolean} escape
+ * @api public
+ */
+
+var Code = module.exports = function Code(val, buffer, escape) {
+  this.val = val;
+  this.buffer = buffer;
+  this.escape = escape;
+  if (val.match(/^ *else/)) this.debug = false;
+};
+
+/**
+ * Inherit from `Node`.
+ */
+
+Code.prototype = new Node;
+Code.prototype.constructor = Code;
+
+}); // module: nodes/code.js
+
+require.register("nodes/comment.js", function(module, exports, require){
+
+/*!
+ * Jade - nodes - Comment
+ * Copyright(c) 2010 TJ Holowaychuk <tj@vision-media.ca>
+ * MIT Licensed
+ */
+
+/**
+ * Module dependencies.
+ */
+
+var Node = require('./node');
+
+/**
+ * Initialize a `Comment` with the given `val`, optionally `buffer`,
+ * otherwise the comment may render in the output.
+ *
+ * @param {String} val
+ * @param {Boolean} buffer
+ * @api public
+ */
+
+var Comment = module.exports = function Comment(val, buffer) {
+  this.val = val;
+  this.buffer = buffer;
+};
+
+/**
+ * Inherit from `Node`.
+ */
+
+Comment.prototype = new Node;
+Comment.prototype.constructor = Comment;
+
+}); // module: nodes/comment.js
+
+require.register("nodes/doctype.js", function(module, exports, require){
+
+/*!
+ * Jade - nodes - Doctype
+ * Copyright(c) 2010 TJ Holowaychuk <tj@vision-media.ca>
+ * MIT Licensed
+ */
+
+/**
+ * Module dependencies.
+ */
+
+var Node = require('./node');
+
+/**
+ * Initialize a `Doctype` with the given `val`. 
+ *
+ * @param {String} val
+ * @api public
+ */
+
+var Doctype = module.exports = function Doctype(val) {
+  this.val = val;
+};
+
+/**
+ * Inherit from `Node`.
+ */
+
+Doctype.prototype = new Node;
+Doctype.prototype.constructor = Doctype;
+
+}); // module: nodes/doctype.js
+
+require.register("nodes/each.js", function(module, exports, require){
+
+/*!
+ * Jade - nodes - Each
+ * Copyright(c) 2010 TJ Holowaychuk <tj@vision-media.ca>
+ * MIT Licensed
+ */
+
+/**
+ * Module dependencies.
+ */
+
+var Node = require('./node');
+
+/**
+ * Initialize an `Each` node, representing iteration
+ *
+ * @param {String} obj
+ * @param {String} val
+ * @param {String} key
+ * @param {Block} block
+ * @api public
+ */
+
+var Each = module.exports = function Each(obj, val, key, block) {
+  this.obj = obj;
+  this.val = val;
+  this.key = key;
+  this.block = block;
+};
+
+/**
+ * Inherit from `Node`.
+ */
+
+Each.prototype = new Node;
+Each.prototype.constructor = Each;
+
+}); // module: nodes/each.js
+
+require.register("nodes/filter.js", function(module, exports, require){
+
+/*!
+ * Jade - nodes - Filter
+ * Copyright(c) 2010 TJ Holowaychuk <tj@vision-media.ca>
+ * MIT Licensed
+ */
+
+/**
+ * Module dependencies.
+ */
+
+var Node = require('./node')
+  , Block = require('./block');
+
+/**
+ * Initialize a `Filter` node with the given 
+ * filter `name` and `block`.
+ *
+ * @param {String} name
+ * @param {Block|Node} block
+ * @api public
+ */
+
+var Filter = module.exports = function Filter(name, block, attrs) {
+  this.name = name;
+  this.block = block;
+  this.attrs = attrs;
+  this.isASTFilter = !block.nodes.every(function(node){ return node.isText });
+};
+
+/**
+ * Inherit from `Node`.
+ */
+
+Filter.prototype = new Node;
+Filter.prototype.constructor = Filter;
+
+}); // module: nodes/filter.js
+
+require.register("nodes/index.js", function(module, exports, require){
+
+/*!
+ * Jade - nodes
+ * Copyright(c) 2010 TJ Holowaychuk <tj@vision-media.ca>
+ * MIT Licensed
+ */
+
+exports.Node = require('./node');
+exports.Tag = require('./tag');
+exports.Code = require('./code');
+exports.Each = require('./each');
+exports.Case = require('./case');
+exports.Text = require('./text');
+exports.Block = require('./block');
+exports.Mixin = require('./mixin');
+exports.Filter = require('./filter');
+exports.Comment = require('./comment');
+exports.Literal = require('./literal');
+exports.BlockComment = require('./block-comment');
+exports.Doctype = require('./doctype');
+
+}); // module: nodes/index.js
+
+require.register("nodes/literal.js", function(module, exports, require){
+
+/*!
+ * Jade - nodes - Literal
+ * Copyright(c) 2010 TJ Holowaychuk <tj@vision-media.ca>
+ * MIT Licensed
+ */
+
+/**
+ * Module dependencies.
+ */
+
+var Node = require('./node');
+
+/**
+ * Initialize a `Literal` node with the given `str.
+ *
+ * @param {String} str
+ * @api public
+ */
+
+var Literal = module.exports = function Literal(str) {
+  this.str = str
+    .replace(/\\/g, "\\\\")
+    .replace(/\n|\r\n/g, "\\n")
+    .replace(/'/g, "\\'");
+};
+
+/**
+ * Inherit from `Node`.
+ */
+
+Literal.prototype = new Node;
+Literal.prototype.constructor = Literal;
+
+
+}); // module: nodes/literal.js
+
+require.register("nodes/mixin.js", function(module, exports, require){
+
+/*!
+ * Jade - nodes - Mixin
+ * Copyright(c) 2010 TJ Holowaychuk <tj@vision-media.ca>
+ * MIT Licensed
+ */
+
+/**
+ * Module dependencies.
+ */
+
+var Attrs = require('./attrs');
+
+/**
+ * Initialize a new `Mixin` with `name` and `block`.
+ *
+ * @param {String} name
+ * @param {String} args
+ * @param {Block} block
+ * @api public
+ */
+
+var Mixin = module.exports = function Mixin(name, args, block, call){
+  this.name = name;
+  this.args = args;
+  this.block = block;
+  this.attrs = [];
+  this.call = call;
+};
+
+/**
+ * Inherit from `Attrs`.
+ */
+
+Mixin.prototype = new Attrs;
+Mixin.prototype.constructor = Mixin;
+
+
+
+}); // module: nodes/mixin.js
+
+require.register("nodes/node.js", function(module, exports, require){
+
+/*!
+ * Jade - nodes - Node
+ * Copyright(c) 2010 TJ Holowaychuk <tj@vision-media.ca>
+ * MIT Licensed
+ */
+
+/**
+ * Initialize a `Node`.
+ *
+ * @api public
+ */
+
+var Node = module.exports = function Node(){};
+
+/**
+ * Clone this node (return itself)
+ *
+ * @return {Node}
+ * @api private
+ */
+
+Node.prototype.clone = function(){
+  return this;
+};
+
+}); // module: nodes/node.js
+
+require.register("nodes/tag.js", function(module, exports, require){
+
+/*!
+ * Jade - nodes - Tag
+ * Copyright(c) 2010 TJ Holowaychuk <tj@vision-media.ca>
+ * MIT Licensed
+ */
+
+/**
+ * Module dependencies.
+ */
+
+var Attrs = require('./attrs'),
+    Block = require('./block'),
+    inlineTags = require('../inline-tags');
+
+/**
+ * Initialize a `Tag` node with the given tag `name` and optional `block`.
+ *
+ * @param {String} name
+ * @param {Block} block
+ * @api public
+ */
+
+var Tag = module.exports = function Tag(name, block) {
+  this.name = name;
+  this.attrs = [];
+  this.block = block || new Block;
+};
+
+/**
+ * Inherit from `Attrs`.
+ */
+
+Tag.prototype = new Attrs;
+Tag.prototype.constructor = Tag;
+
+
+/**
+ * Clone this tag.
+ *
+ * @return {Tag}
+ * @api private
+ */
+
+Tag.prototype.clone = function(){
+  var clone = new Tag(this.name, this.block.clone());
+  clone.line = this.line;
+  clone.attrs = this.attrs;
+  clone.textOnly = this.textOnly;
+  return clone;
+};
+
+/**
+ * Check if this tag is an inline tag.
+ *
+ * @return {Boolean}
+ * @api private
+ */
+
+Tag.prototype.isInline = function(){
+  return ~inlineTags.indexOf(this.name);
+};
+
+/**
+ * Check if this tag's contents can be inlined.  Used for pretty printing.
+ *
+ * @return {Boolean}
+ * @api private
+ */
+
+Tag.prototype.canInline = function(){
+  var nodes = this.block.nodes;
+
+  function isInline(node){
+    // Recurse if the node is a block
+    if (node.isBlock) return node.nodes.every(isInline);
+    return node.isText || (node.isInline && node.isInline());
+  }
+  
+  // Empty tag
+  if (!nodes.length) return true;
+  
+  // Text-only or inline-only tag
+  if (1 == nodes.length) return isInline(nodes[0]);
+  
+  // Multi-line inline-only tag
+  if (this.block.nodes.every(isInline)) {
+    for (var i = 1, len = nodes.length; i < len; ++i) {
+      if (nodes[i-1].isText && nodes[i].isText)
+        return false;
+    }
+    return true;
+  }
+  
+  // Mixed tag
+  return false;
+};
+}); // module: nodes/tag.js
+
+require.register("nodes/text.js", function(module, exports, require){
+
+/*!
+ * Jade - nodes - Text
+ * Copyright(c) 2010 TJ Holowaychuk <tj@vision-media.ca>
+ * MIT Licensed
+ */
+
+/**
+ * Module dependencies.
+ */
+
+var Node = require('./node');
+
+/**
+ * Initialize a `Text` node with optional `line`.
+ *
+ * @param {String} line
+ * @api public
+ */
+
+var Text = module.exports = function Text(line) {
+  this.val = '';
+  if ('string' == typeof line) this.val = line;
+};
+
+/**
+ * Inherit from `Node`.
+ */
+
+Text.prototype = new Node;
+Text.prototype.constructor = Text;
+
+
+/**
+ * Flag as text.
+ */
+
+Text.prototype.isText = true;
+}); // module: nodes/text.js
+
+require.register("parser.js", function(module, exports, require){
+
+/*!
+ * Jade - Parser
+ * Copyright(c) 2010 TJ Holowaychuk <tj@vision-media.ca>
+ * MIT Licensed
+ */
+
+/**
+ * Module dependencies.
+ */
+
+var Lexer = require('./lexer')
+  , nodes = require('./nodes');
+
+/**
+ * Initialize `Parser` with the given input `str` and `filename`.
+ *
+ * @param {String} str
+ * @param {String} filename
+ * @param {Object} options
+ * @api public
+ */
+
+var Parser = exports = module.exports = function Parser(str, filename, options){
+  this.input = str;
+  this.lexer = new Lexer(str, options);
+  this.filename = filename;
+  this.blocks = {};
+  this.mixins = {};
+  this.options = options;
+  this.contexts = [this];
+};
+
+/**
+ * Tags that may not contain tags.
+ */
+
+var textOnly = exports.textOnly = ['script', 'style'];
+
+/**
+ * Parser prototype.
+ */
+
+Parser.prototype = {
+
+  /**
+   * Push `parser` onto the context stack,
+   * or pop and return a `Parser`.
+   */
+
+  context: function(parser){
+    if (parser) {
+      this.contexts.push(parser);
+    } else {
+      return this.contexts.pop();
+    }
+  },
+
+  /**
+   * Return the next token object.
+   *
+   * @return {Object}
+   * @api private
+   */
+
+  advance: function(){
+    return this.lexer.advance();
+  },
+
+  /**
+   * Skip `n` tokens.
+   *
+   * @param {Number} n
+   * @api private
+   */
+
+  skip: function(n){
+    while (n--) this.advance();
+  },
+  
+  /**
+   * Single token lookahead.
+   *
+   * @return {Object}
+   * @api private
+   */
+  
+  peek: function() {
+    return this.lookahead(1);
+  },
+  
+  /**
+   * Return lexer lineno.
+   *
+   * @return {Number}
+   * @api private
+   */
+  
+  line: function() {
+    return this.lexer.lineno;
+  },
+  
+  /**
+   * `n` token lookahead.
+   *
+   * @param {Number} n
+   * @return {Object}
+   * @api private
+   */
+  
+  lookahead: function(n){
+    return this.lexer.lookahead(n);
+  },
+  
+  /**
+   * Parse input returning a string of js for evaluation.
+   *
+   * @return {String}
+   * @api public
+   */
+  
+  parse: function(){
+    var block = new nodes.Block, parser;
+    block.line = this.line();
+
+    while ('eos' != this.peek().type) {
+      if ('newline' == this.peek().type) {
+        this.advance();
+      } else {
+        block.push(this.parseExpr());
+      }
+    }
+
+    if (parser = this.extending) {
+      this.context(parser);
+      var ast = parser.parse();
+      this.context();
+      // hoist mixins
+      for (var name in this.mixins)
+        ast.unshift(this.mixins[name]);
+      return ast;
+    }
+
+    return block;
+  },
+  
+  /**
+   * Expect the given type, or throw an exception.
+   *
+   * @param {String} type
+   * @api private
+   */
+  
+  expect: function(type){
+    if (this.peek().type === type) {
+      return this.advance();
+    } else {
+      throw new Error('expected "' + type + '", but got "' + this.peek().type + '"');
+    }
+  },
+  
+  /**
+   * Accept the given `type`.
+   *
+   * @param {String} type
+   * @api private
+   */
+  
+  accept: function(type){
+    if (this.peek().type === type) {
+      return this.advance();
+    }
+  },
+  
+  /**
+   *   tag
+   * | doctype
+   * | mixin
+   * | include
+   * | filter
+   * | comment
+   * | text
+   * | each
+   * | code
+   * | yield
+   * | id
+   * | class
+   * | interpolation
+   */
+  
+  parseExpr: function(){
+    switch (this.peek().type) {
+      case 'tag':
+        return this.parseTag();
+      case 'mixin':
+        return this.parseMixin();
+      case 'block':
+        return this.parseBlock();
+      case 'case':
+        return this.parseCase();
+      case 'when':
+        return this.parseWhen();
+      case 'default':
+        return this.parseDefault();
+      case 'extends':
+        return this.parseExtends();
+      case 'include':
+        return this.parseInclude();
+      case 'doctype':
+        return this.parseDoctype();
+      case 'filter':
+        return this.parseFilter();
+      case 'comment':
+        return this.parseComment();
+      case 'text':
+        return this.parseText();
+      case 'each':
+        return this.parseEach();
+      case 'code':
+        return this.parseCode();
+      case 'call':
+        return this.parseCall();
+      case 'interpolation':
+        return this.parseInterpolation();
+      case 'yield':
+        this.advance();
+        var block = new nodes.Block;
+        block.yield = true;
+        return block;
+      case 'id':
+      case 'class':
+        var tok = this.advance();
+        this.lexer.defer(this.lexer.tok('tag', 'div'));
+        this.lexer.defer(tok);
+        return this.parseExpr();
+      default:
+        throw new Error('unexpected token "' + this.peek().type + '"');
+    }
+  },
+  
+  /**
+   * Text
+   */
+  
+  parseText: function(){
+    var tok = this.expect('text')
+      , node = new nodes.Text(tok.val);
+    node.line = this.line();
+    return node;
+  },
+
+  /**
+   *   ':' expr
+   * | block
+   */
+
+  parseBlockExpansion: function(){
+    if (':' == this.peek().type) {
+      this.advance();
+      return new nodes.Block(this.parseExpr());
+    } else {
+      return this.block();
+    }
+  },
+
+  /**
+   * case
+   */
+
+  parseCase: function(){
+    var val = this.expect('case').val
+      , node = new nodes.Case(val);
+    node.line = this.line();
+    node.block = this.block();
+    return node;
+  },
+
+  /**
+   * when
+   */
+
+  parseWhen: function(){
+    var val = this.expect('when').val
+    return new nodes.Case.When(val, this.parseBlockExpansion());
+  },
+  
+  /**
+   * default
+   */
+
+  parseDefault: function(){
+    this.expect('default');
+    return new nodes.Case.When('default', this.parseBlockExpansion());
+  },
+
+  /**
+   * code
+   */
+  
+  parseCode: function(){
+    var tok = this.expect('code')
+      , node = new nodes.Code(tok.val, tok.buffer, tok.escape)
+      , block
+      , i = 1;
+    node.line = this.line();
+    while (this.lookahead(i) && 'newline' == this.lookahead(i).type) ++i;
+    block = 'indent' == this.lookahead(i).type;
+    if (block) {
+      this.skip(i-1);
+      node.block = this.block();
+    }
+    return node;
+  },
+  
+  /**
+   * comment
+   */
+  
+  parseComment: function(){
+    var tok = this.expect('comment')
+      , node;
+
+    if ('indent' == this.peek().type) {
+      node = new nodes.BlockComment(tok.val, this.block(), tok.buffer);
+    } else {
+      node = new nodes.Comment(tok.val, tok.buffer);
+    }
+
+    node.line = this.line();
+    return node;
+  },
+  
+  /**
+   * doctype
+   */
+  
+  parseDoctype: function(){
+    var tok = this.expect('doctype')
+      , node = new nodes.Doctype(tok.val);
+    node.line = this.line();
+    return node;
+  },
+  
+  /**
+   * filter attrs? text-block
+   */
+  
+  parseFilter: function(){
+    var block
+      , tok = this.expect('filter')
+      , attrs = this.accept('attrs');
+
+    this.lexer.pipeless = true;
+    block = this.parseTextBlock();
+    this.lexer.pipeless = false;
+
+    var node = new nodes.Filter(tok.val, block, attrs && attrs.attrs);
+    node.line = this.line();
+    return node;
+  },
+  
+  /**
+   * tag ':' attrs? block
+   */
+  
+  parseASTFilter: function(){
+    var block
+      , tok = this.expect('tag')
+      , attrs = this.accept('attrs');
+
+    this.expect(':');
+    block = this.block();
+
+    var node = new nodes.Filter(tok.val, block, attrs && attrs.attrs);
+    node.line = this.line();
+    return node;
+  },
+  
+  /**
+   * each block
+   */
+  
+  parseEach: function(){
+    var tok = this.expect('each')
+      , node = new nodes.Each(tok.code, tok.val, tok.key);
+    node.line = this.line();
+    node.block = this.block();
+    return node;
+  },
+
+  /**
+   * 'extends' name
+   */
+
+  parseExtends: function(){
+    var path = require('path')
+      , fs = require('fs')
+      , dirname = path.dirname
+      , basename = path.basename
+      , join = path.join;
+
+    if (!this.filename)
+      throw new Error('the "filename" option is required to extend templates');
+
+    var path = this.expect('extends').val.trim()
+      , dir = dirname(this.filename);
+
+    var path = join(dir, path + '.jade')
+      , str = fs.readFileSync(path, 'utf8')
+      , parser = new Parser(str, path, this.options);
+
+    parser.blocks = this.blocks;
+    parser.contexts = this.contexts;
+    this.extending = parser;
+
+    // TODO: null node
+    return new nodes.Literal('');
+  },
+
+  /**
+   * 'block' name block
+   */
+
+  parseBlock: function(){
+    var block = this.expect('block')
+      , mode = block.mode
+      , name = block.val.trim();
+
+    block = 'indent' == this.peek().type
+      ? this.block()
+      : new nodes.Block(new nodes.Literal(''));
+
+    var prev = this.blocks[name];
+
+    if (prev) {
+      switch (prev.mode) {
+        case 'append':
+          block.nodes = block.nodes.concat(prev.nodes);
+          prev = block;
+          break;
+        case 'prepend':
+          block.nodes = prev.nodes.concat(block.nodes);
+          prev = block;
+          break;
+      }
+    }
+
+    block.mode = mode;
+    return this.blocks[name] = prev || block;
+  },
+
+  /**
+   * include block?
+   */
+
+  parseInclude: function(){
+    var path = require('path')
+      , fs = require('fs')
+      , dirname = path.dirname
+      , basename = path.basename
+      , join = path.join;
+
+    var path = this.expect('include').val.trim()
+      , dir = dirname(this.filename);
+
+    if (!this.filename)
+      throw new Error('the "filename" option is required to use includes');
+
+    // no extension
+    if (!~basename(path).indexOf('.')) {
+      path += '.jade';
+    }
+
+    // non-jade
+    if ('.jade' != path.substr(-5)) {
+      var path = join(dir, path)
+        , str = fs.readFileSync(path, 'utf8');
+      return new nodes.Literal(str);
+    }
+
+    var path = join(dir, path)
+      , str = fs.readFileSync(path, 'utf8')
+     , parser = new Parser(str, path, this.options);
+    parser.blocks = this.blocks;
+    parser.mixins = this.mixins;
+
+    this.context(parser);
+    var ast = parser.parse();
+    this.context();
+    ast.filename = path;
+
+    if ('indent' == this.peek().type) {
+      ast.includeBlock().push(this.block());
+    }
+
+    return ast;
+  },
+
+  /**
+   * call ident block
+   */
+
+  parseCall: function(){
+    var tok = this.expect('call')
+      , name = tok.val
+      , args = tok.args
+      , mixin = new nodes.Mixin(name, args, new nodes.Block, true);
+
+    this.tag(mixin);
+    if (mixin.block.isEmpty()) mixin.block = null;
+    return mixin;
+  },
+
+  /**
+   * mixin block
+   */
+
+  parseMixin: function(){
+    var tok = this.expect('mixin')
+      , name = tok.val
+      , args = tok.args
+      , mixin;
+
+    // definition
+    if ('indent' == this.peek().type) {
+      mixin = new nodes.Mixin(name, args, this.block(), false);
+      this.mixins[name] = mixin;
+      return mixin;
+    // call
+    } else {
+      return new nodes.Mixin(name, args, null, true);
+    }
+  },
+
+  /**
+   * indent (text | newline)* outdent
+   */
+
+  parseTextBlock: function(){
+    var block = new nodes.Block;
+    block.line = this.line();
+    var spaces = this.expect('indent').val;
+    if (null == this._spaces) this._spaces = spaces;
+    var indent = Array(spaces - this._spaces + 1).join(' ');
+    while ('outdent' != this.peek().type) {
+      switch (this.peek().type) {
+        case 'newline':
+          this.advance();
+          break;
+        case 'indent':
+          this.parseTextBlock().nodes.forEach(function(node){
+            block.push(node);
+          });
+          break;
+        default:
+          var text = new nodes.Text(indent + this.advance().val);
+          text.line = this.line();
+          block.push(text);
+      }
+    }
+
+    if (spaces == this._spaces) this._spaces = null;
+    this.expect('outdent');
+    return block;
+  },
+
+  /**
+   * indent expr* outdent
+   */
+  
+  block: function(){
+    var block = new nodes.Block;
+    block.line = this.line();
+    this.expect('indent');
+    while ('outdent' != this.peek().type) {
+      if ('newline' == this.peek().type) {
+        this.advance();
+      } else {
+        block.push(this.parseExpr());
+      }
+    }
+    this.expect('outdent');
+    return block;
+  },
+
+  /**
+   * interpolation (attrs | class | id)* (text | code | ':')? newline* block?
+   */
+  
+  parseInterpolation: function(){
+    var tok = this.advance();
+    var tag = new nodes.Tag(tok.val);
+    tag.buffer = true;
+    return this.tag(tag);
+  },
+
+  /**
+   * tag (attrs | class | id)* (text | code | ':')? newline* block?
+   */
+  
+  parseTag: function(){
+    // ast-filter look-ahead
+    var i = 2;
+    if ('attrs' == this.lookahead(i).type) ++i;
+    if (':' == this.lookahead(i).type) {
+      if ('indent' == this.lookahead(++i).type) {
+        return this.parseASTFilter();
+      }
+    }
+
+    var tok = this.advance()
+      , tag = new nodes.Tag(tok.val);
+
+    tag.selfClosing = tok.selfClosing;
+
+    return this.tag(tag);
+  },
+
+  /**
+   * Parse tag.
+   */
+
+  tag: function(tag){
+    var dot;
+
+    tag.line = this.line();
+
+    // (attrs | class | id)*
+    out:
+      while (true) {
+        switch (this.peek().type) {
+          case 'id':
+          case 'class':
+            var tok = this.advance();
+            tag.setAttribute(tok.type, "'" + tok.val + "'");
+            continue;
+          case 'attrs':
+            var tok = this.advance()
+              , obj = tok.attrs
+              , escaped = tok.escaped
+              , names = Object.keys(obj);
+
+            if (tok.selfClosing) tag.selfClosing = true;
+
+            for (var i = 0, len = names.length; i < len; ++i) {
+              var name = names[i]
+                , val = obj[name];
+              tag.setAttribute(name, val, escaped[name]);
+            }
+            continue;
+          default:
+            break out;
+        }
+      }
+
+    // check immediate '.'
+    if ('.' == this.peek().val) {
+      dot = tag.textOnly = true;
+      this.advance();
+    }
+
+    // (text | code | ':')?
+    switch (this.peek().type) {
+      case 'text':
+        tag.block.push(this.parseText());
+        break;
+      case 'code':
+        tag.code = this.parseCode();
+        break;
+      case ':':
+        this.advance();
+        tag.block = new nodes.Block;
+        tag.block.push(this.parseExpr());
+        break;
+    }
+
+    // newline*
+    while ('newline' == this.peek().type) this.advance();
+
+    tag.textOnly = tag.textOnly || ~textOnly.indexOf(tag.name);
+
+    // script special-case
+    if ('script' == tag.name) {
+      var type = tag.getAttribute('type');
+      if (!dot && type && 'text/javascript' != type.replace(/^['"]|['"]$/g, '')) {
+        tag.textOnly = false;
+      }
+    }
+
+    // block?
+    if ('indent' == this.peek().type) {
+      if (tag.textOnly) {
+        this.lexer.pipeless = true;
+        tag.block = this.parseTextBlock();
+        this.lexer.pipeless = false;
+      } else {
+        var block = this.block();
+        if (tag.block) {
+          for (var i = 0, len = block.nodes.length; i < len; ++i) {
+            tag.block.push(block.nodes[i]);
+          }
+        } else {
+          tag.block = block;
+        }
+      }
+    }
+    
+    return tag;
+  }
+};
+
+}); // module: parser.js
+
+require.register("runtime.js", function(module, exports, require){
+
+/*!
+ * Jade - runtime
+ * Copyright(c) 2010 TJ Holowaychuk <tj@vision-media.ca>
+ * MIT Licensed
+ */
+
+/**
+ * Lame Array.isArray() polyfill for now.
+ */
+
+if (!Array.isArray) {
+  Array.isArray = function(arr){
+    return '[object Array]' == Object.prototype.toString.call(arr);
+  };
+}
+
+/**
+ * Lame Object.keys() polyfill for now.
+ */
+
+if (!Object.keys) {
+  Object.keys = function(obj){
+    var arr = [];
+    for (var key in obj) {
+      if (obj.hasOwnProperty(key)) {
+        arr.push(key);
+      }
+    }
+    return arr;
+  }
+}
+
+/**
+ * Merge two attribute objects giving precedence
+ * to values in object `b`. Classes are special-cased
+ * allowing for arrays and merging/joining appropriately
+ * resulting in a string.
+ *
+ * @param {Object} a
+ * @param {Object} b
+ * @return {Object} a
+ * @api private
+ */
+
+exports.merge = function merge(a, b) {
+  var ac = a['class'];
+  var bc = b['class'];
+
+  if (ac || bc) {
+    ac = ac || [];
+    bc = bc || [];
+    if (!Array.isArray(ac)) ac = [ac];
+    if (!Array.isArray(bc)) bc = [bc];
+    ac = ac.filter(nulls);
+    bc = bc.filter(nulls);
+    a['class'] = ac.concat(bc).join(' ');
+  }
+
+  for (var key in b) {
+    if (key != 'class') {
+      a[key] = b[key];
+    }
+  }
+
+  return a;
+};
+
+/**
+ * Filter null `val`s.
+ *
+ * @param {Mixed} val
+ * @return {Mixed}
+ * @api private
+ */
+
+function nulls(val) {
+  return val != null;
+}
+
+/**
+ * Render the given attributes object.
+ *
+ * @param {Object} obj
+ * @param {Object} escaped
+ * @return {String}
+ * @api private
+ */
+
+exports.attrs = function attrs(obj, escaped){
+  var buf = []
+    , terse = obj.terse;
+
+  delete obj.terse;
+  var keys = Object.keys(obj)
+    , len = keys.length;
+
+  if (len) {
+    buf.push('');
+    for (var i = 0; i < len; ++i) {
+      var key = keys[i]
+        , val = obj[key];
+
+      if ('boolean' == typeof val || null == val) {
+        if (val) {
+          terse
+            ? buf.push(key)
+            : buf.push(key + '="' + key + '"');
+        }
+      } else if (0 == key.indexOf('data') && 'string' != typeof val) {
+        buf.push(key + "='" + JSON.stringify(val) + "'");
+      } else if ('class' == key && Array.isArray(val)) {
+        buf.push(key + '="' + exports.escape(val.join(' ')) + '"');
+      } else if (escaped && escaped[key]) {
+        buf.push(key + '="' + exports.escape(val) + '"');
+      } else {
+        buf.push(key + '="' + val + '"');
+      }
+    }
+  }
+
+  return buf.join(' ');
+};
+
+/**
+ * Escape the given string of `html`.
+ *
+ * @param {String} html
+ * @return {String}
+ * @api private
+ */
+
+exports.escape = function escape(html){
+  return String(html)
+    .replace(/&(?!(\w+|\#\d+);)/g, '&amp;')
+    .replace(/</g, '&lt;')
+    .replace(/>/g, '&gt;')
+    .replace(/"/g, '&quot;');
+};
+
+/**
+ * Re-throw the given `err` in context to the
+ * the jade in `filename` at the given `lineno`.
+ *
+ * @param {Error} err
+ * @param {String} filename
+ * @param {String} lineno
+ * @api private
+ */
+
+exports.rethrow = function rethrow(err, filename, lineno){
+  if (!filename) throw err;
+
+  var context = 3
+    , str = require('fs').readFileSync(filename, 'utf8')
+    , lines = str.split('\n')
+    , start = Math.max(lineno - context, 0)
+    , end = Math.min(lines.length, lineno + context);
+
+  // Error context
+  var context = lines.slice(start, end).map(function(line, i){
+    var curr = i + start + 1;
+    return (curr == lineno ? '  > ' : '    ')
+      + curr
+      + '| '
+      + line;
+  }).join('\n');
+
+  // Alter exception message
+  err.path = filename;
+  err.message = (filename || 'Jade') + ':' + lineno
+    + '\n' + context + '\n\n' + err.message;
+  throw err;
+};
+
+}); // module: runtime.js
+
+require.register("self-closing.js", function(module, exports, require){
+
+/*!
+ * Jade - self closing tags
+ * Copyright(c) 2010 TJ Holowaychuk <tj@vision-media.ca>
+ * MIT Licensed
+ */
+
+module.exports = [
+    'meta'
+  , 'img'
+  , 'link'
+  , 'input'
+  , 'source'
+  , 'area'
+  , 'base'
+  , 'col'
+  , 'br'
+  , 'hr'
+];
+}); // module: self-closing.js
+
+require.register("utils.js", function(module, exports, require){
+
+/*!
+ * Jade - utils
+ * Copyright(c) 2010 TJ Holowaychuk <tj@vision-media.ca>
+ * MIT Licensed
+ */
+
+/**
+ * Convert interpolation in the given string to JavaScript.
+ *
+ * @param {String} str
+ * @return {String}
+ * @api private
+ */
+
+var interpolate = exports.interpolate = function(str){
+  return str.replace(/(\\)?([#!]){(.*?)}/g, function(str, escape, flag, code){
+    return escape
+      ? str
+      : "' + "
+        + ('!' == flag ? '' : 'escape')
+        + "((interp = " + code.replace(/\\'/g, "'")
+        + ") == null ? '' : interp) + '";
+  });
+};
+
+/**
+ * Escape single quotes in `str`.
+ *
+ * @param {String} str
+ * @return {String}
+ * @api private
+ */
+
+var escape = exports.escape = function(str) {
+  return str.replace(/'/g, "\\'");
+};
+
+/**
+ * Interpolate, and escape the given `str`.
+ *
+ * @param {String} str
+ * @return {String}
+ * @api private
+ */
+
+exports.text = function(str){
+  return interpolate(escape(str));
+};
+}); // module: utils.js
+
+window.jade = require("jade");
+})();