JarCastingast-transform 
Convenience wrapper for performing AST transformations with browserify transform streams. Note that it doesn't handle source maps nicely, though pull requests are welcome!
Usage
ast(transform[, opts])
Where transform is a function that takes a filename and returns a function, e.g.:
var replace = require('replace-method')
var ast = require('ast-transform')
var path = require('path')
module.exports = ast(function (file) {
if (path.extname(file) !== '.js') return
return function(ast, done) {
// replace require calls with
// strings for some reason
replace(ast)(['require'], function(node) {
return { type: 'Literal', value: 'replaced!' }
})
done()
}
})
Note that you can return a falsey value instead of a function to bail the stream early and avoid the parse/deparse overhead. Here's an example of using the above with browserify:
var browserify = require('browserify')
var example = require('./example')
var fs = require('fs')
browserify('./index.js')
.transform(example)
.bundle()
.pipe(fs.createWriteStream(__filename + '/bundle.js'))
License
MIT. See LICENSE.md for details.