Can Yeoman generators update existing files?

Ok, so I found the answer to my question.

Addy Osmani showed me where to look in this thread on twitter, and then I later found this link which shows exactly what I need.

The gist of it boils down to two functions : readFileAsString and write. Usage is as follows:

var path = "/path/to/file.html",
    file = this.readFileAsString(path);

/* make modifications to the file string here */

this.write(path, file);

Edit: I’ve also blogged about this on my blog.

 EDIT 1

As mentionned in comments by Toilal :

The write method doesn’t exists anymore, and must be replaced by writeFileFromString (arguments are also reversed) – Toilal

EDIT 2

And then, as mentionned in comments by ivoba:

this.writeFileFromString & this.readFileAsString are deprecated, github.com/yeoman/html-wiring should be used by now, things change 🙂 – ivoba