Script in node to cleanup terraform state file based on terraform file

clean-tf-state.js

# $1 parameter inverse (true|false)
# inverse true remove what is in tf file
# inverse false remove what is not in tf file

# command: node clean-tf-state.js [true|false]

const json = require("./state.json")
const fs = require('fs')
const inverse = process.argv[1]

const parse = (item) => {
    if(item.module) {
        return item.module.replace(/([^\.]+)\.([^\.]+).+/, '\$1 "\$2')
    }
    return `${item.type}" "${item.name}`
}

fs.readFile(`./main.tf`, 'utf8', (err, data) => {
    if (err) {
        return console.log(err);
    }

    console.log('original', json.resources.length)

    const template = {...json}
    const cache = []
    
    json.resources.map((item) => {
        const custom = parse(item)
        return {...item, custom}
    })
    .forEach((item) => {
        if(data.includes(item.custom) && !inverse || !data.includes(item.custom) && inverse) {
            cache.push(item)
        }
    })

    template.resources = cache
    console.log('resources', template.resources.length)
    const file = inverse ? './new-state-inverse.json' : `./new-state.json`
    fs.writeFile(file, JSON.stringify(template, null, 2), () => {});
});