walk an AST, quickly
npm install dash-ast
var dashAst = require('dash-ast')
var isIdentifier = require('estree-is-identifier')
var deps = []
dashAst(ast, function (node, parent) {
if (node.type === 'CallExpression' && isIdentifier(node.callee, 'require')) {
deps.push(node.arguments[0])
}
})Call callback(node, parent) on each node in ast. This does a preorder traversal, i.e. callback receives child nodes after the parent node.
Call enter(node, parent) on each node in ast before traversing its children, and call leave(enter, parent) on each node after traversing its children. If a node does not have children, enter() and leave() are called immediately after each other.