How to run a multiline script in truffle console?

Question

I'm following truffle tutorial to interact with a deployed contract and have a naive question. How do I run this block of multiline scripts in truffle(development)> without collapsing it into a single line?

var account_one = "0x1234..."; // an address
var account_two = "0xabcd..."; // another address

var meta;
MetaCoin.deployed().then(function(instance) {
  meta = instance;
  return meta.sendCoin(account_two, 10, {from: account_one});
}).then(function(result) {
  // If this callback is called, the transaction was successfully processed.
  alert("Transaction successful!")
}).catch(function(e) {
  // There was an error! Handle it.
})

Answer 1

You can simply require the file you want to run, just like how you would in a node application:

$ echo "console.log('hello')" > myfile.js
$ truffle console
truffle(development)> require('./myfile.js')
hello

However, the deployed contract won't be available but truffle does offer the exec command which injects a web3 provider. You'd just have to create the contract instance.

Example myfile.js

const artifacts = require('./build/contracts/MyContract.json')
const contract = require('truffle-contract')
const MyContract = contract(artifacts);
MyContract.setProvider(web3.currentProvider);

MyContract.deployed()
.then(function(instance) {
  console.log(instance.address)
})
.catch(function(error) {
  console.error(error)
})

Then run in console:

$ truffle console
truffle(development)> exec ./myfile.js
0x6e153f03845fc132d73cb03c3f1d1b6c13d715fc

Answer 2

Truffle-Contract is now deprecated: https://www.npmjs.com/package/truffle-contract

We should be using now: @truffle/contract https://www.npmjs.com/package/@truffle/contract

Also as of today this works on truffle console:

const CakeToken = artifacts.require("./CakeToken.sol")

module.exports = async function(callback) {
    const cakeToken = await CakeToken.deployed()
    console.log(cakeToken.address)
}