--- /dev/null
+var util = require('util')
+
+var INDENT_START = /[\{\[]/
+var INDENT_END = /[\}\]]/
+
+module.exports = function() {
+ var lines = []
+ var indent = 0
+
+ var push = function(str) {
+ var spaces = ''
+ while (spaces.length < indent*2) spaces += ' '
+ lines.push(spaces+str)
+ }
+
+ var line = function(fmt) {
+ if (!fmt) return line
+
+ if (INDENT_END.test(fmt.trim()[0]) && INDENT_START.test(fmt[fmt.length-1])) {
+ indent--
+ push(util.format.apply(util, arguments))
+ indent++
+ return line
+ }
+ if (INDENT_START.test(fmt[fmt.length-1])) {
+ push(util.format.apply(util, arguments))
+ indent++
+ return line
+ }
+ if (INDENT_END.test(fmt.trim()[0])) {
+ indent--
+ push(util.format.apply(util, arguments))
+ return line
+ }
+
+ push(util.format.apply(util, arguments))
+ return line
+ }
+
+ line.toString = function() {
+ return lines.join('\n')
+ }
+
+ line.toFunction = function(scope) {
+ var src = 'return ('+line.toString()+')'
+
+ var keys = Object.keys(scope || {}).map(function(key) {
+ return key
+ })
+
+ var vals = keys.map(function(key) {
+ return scope[key]
+ })
+
+ return Function.apply(null, keys.concat(src)).apply(null, vals)
+ }
+
+ if (arguments.length) line.apply(null, arguments)
+
+ return line
+}