Pass through 'depth' option

Author: Will O'Brien

README.md

@@ -30,6 +30,24 @@ gulp.task('markdown', function(){
 
 ```
 
+By default, doctoc puts the TOC at the top of the file. To place it somewhere else, add:
+
+```
+<!-- START doctoc -->
+<!-- END doctoc -->
+```
+
+Custom `title` and `depth` options are also accepted
+
+```
+    // ...
+    .pipe(toc({
+      title: "Table des matières",
+      depth: 3
+    }))
+    // ...
+```
+
 Thanks
 -------
 

index.js

@@ -6,10 +6,11 @@ var through  = require('through2'),
 
 module.exports = function(opts){
   if(opts == null){opts = {};}
-  var title = opts.title || "";
+  var title = opts.title || "",
+      depth = opts.depth || 4;
 
   var addToc = function (file){
-    var mdWithToc = doctoc(file.contents.toString(), null, null, title).data;
+    var mdWithToc = doctoc(file.contents.toString('utf8'), null, depth, title).data;
     mdWithToc = mdWithToc || file.contents.toString();
     file.contents = new Buffer(mdWithToc, 'utf8');
     return file;

test/fixture/after-w-depth.md

@@ -0,0 +1,19 @@
+
+# Article
+
+<!-- START doctoc generated TOC please keep comment here to allow auto update -->
+<!-- DON'T EDIT THIS SECTION, INSTEAD RE-RUN doctoc TO UPDATE -->
+**Table of Contents**  *generated with [DocToc](https://github.com/thlorenz/doctoc)*
+
+- [Hello](#hello)
+
+<!-- END doctoc generated TOC please keep comment here to allow auto update -->
+
+## Hello
+
+### World
+
+### Hi
+
+
+

test/test.js

@@ -67,3 +67,24 @@ it('should empty files', function (cb) {
 
   stream.end();
 });
+
+it('should allow depth change', function (cb) {
+
+  var stream = gdoctoc({depth: 2});
+
+  stream.on('data', function (file) {
+    assert.equal(file.relative, 'before.md');
+    assert.equal(file.path, 'test/fixture/before.md');
+    assert.equal(file.contents.toString(), fs.readFileSync('./test/fixture/after-w-depth.md', 'utf8'));
+    cb();
+  });
+
+  stream.write(new gutil.File({
+    cwd: 'test',
+    base: 'test/fixture',
+    path: 'test/fixture/before.md',
+    contents: fs.readFileSync('./test/fixture/before.md')
+  }));
+
+  stream.end();
+});