--- /dev/null
+var makeString = require('./helper/makeString');
+
+function getIndent(str) {
+ var matches = str.match(/^[\s\\t]*/gm);
+ var indent = matches[0].length;
+
+ for (var i = 1; i < matches.length; i++) {
+ indent = Math.min(matches[i].length, indent);
+ }
+
+ return indent;
+}
+
+module.exports = function dedent(str, pattern) {
+ str = makeString(str);
+ var indent = getIndent(str);
+ var reg;
+
+ if (indent === 0) return str;
+
+ if (typeof pattern === 'string') {
+ reg = new RegExp('^' + pattern, 'gm');
+ } else {
+ reg = new RegExp('^[ \\t]{' + indent + '}', 'gm');
+ }
+
+ return str.replace(reg, '');
+};