Cannot exec simple javascript file into Truffle

Question

I have a file x.js which works fine on it's own.

function test() {
    console.log("test");
}

I want to include this into truffle, so I do the following

truffle(development)> exec ./x.js
Using network 'development'.

TypeError: fn is not a function
    at /usr/local/lib/node_modules/truffle/build/webpack:/packages/truffle-require/require.js:128:1

I do not understand the error, how to fix?

Use `truffle exec` https://medium.com/@timothyjcoulter/truffle-tricks-for-ethereum-development-dispelling-8-myths-first-impressions-880f66bf3320#69be — Zulhilmi Zainudin, Feb 06 '19 at 19:06
But I want to import the function - i.e. use it on the console command line. — Peter Prographo, Feb 07 '19 at 10:03

score 5 · Answer 1 · answered Jul 16 '19 at 05:19

Truffle requires your script to export a function. Try something like this:

module.exports = function(callback) {
    console.log("test");
    callback();
}

And check out the docs: https://www.trufflesuite.com/docs/truffle/getting-started/writing-external-scripts

Cannot exec simple javascript file into Truffle

1 Answers1