How to save configuration settings for my NodeJs CLI app? - node.js

Question

I'm crafting a nodejs application as a cli tool. I'm using yargs to define my commands and I'm using the .config() method to load default configuration settings from a .config or config.json file, like so:
const findUp = require('find-up')
const fs = require('fs')
const yargs = require('yargs');
const configPath = findUp.sync(['.config', 'config.json']);
const config = configPath ? JSON.parse(fs.readFileSync(configPath)) : {};
yargs
.command( require('./command/command-name'))
.option( .... )
.config( config )
.argv
I would like to create a command that I can use to configure my .config file. Something like:
my-tool configure --defaults key1=<value> key2=<value>
Is there an npm package available to do this, or would I have to roll my own?

Answer 1

I rolled my own.
# configure.js
const findUp = require('find-up')
const fs = require('fs')
exports.command = 'configure'
exports.desc = 'Set or view your configuration'
exports.builder = {
'defaults': {
desc: 'set configuration values',
type: 'array',
group: 'Parameters:'
}
}
exports.handler = function (argv) {
const configPath = findUp.sync(['.config', 'config.json']);
const config = configPath ? JSON.parse(fs.readFileSync(configPath)) : {};
if (argv.defaults) {
argv.defaults.map( arg => {
var args = arg.split('=');
if (args[1]) {
config[args[0]] = args[1];
} else {
delete config[args[0]];
}
})
var file = configPath ? configPath : "./.config";
fs.writeFileSync(file, JSON.stringify(config, null, 2));
} else {
console.log( JSON.stringify(config, null, 2));
}
}