findPolicyUsage.js

"use strict"

const shell = require("shelljs")
const args = process.argv

if (args[2] == undefined) {
	console.log(`You must enter your policy name`)
	return false
}
const policyName = args[2]

let listRole = shell.exec(`aws iam list-roles | grep RoleName`, { silent: true }).stdout.split("\n")
console.log(`Searching for policy in ${listRole.length - 1} role(s)`)
for (let i = 0; i < listRole.length - 1; i++) {
	let t = listRole[i].split(":")
	let current_role = t[1].replace('"', "").replace('"', "").replace(",", "").trim()
	let policiesList = JSON.parse(shell.exec(`aws iam list-attached-role-policies --role-name ${current_role}`, { silent: true }))
	Object.entries(policiesList.AttachedPolicies).forEach(([key, value]) => {
		if (value.PolicyName == policyName) {
			console.log(`Policy (${value.PolicyName}) found for role : "${current_role}"`)
		}
	})
}