cli.js

#!/usr/bin/env node

import fs from 'node:fs';
import process from 'node:process';
import path from 'node:path';
import { program } from 'commander';
import picocolors from 'picocolors';
import fusv from './index.js';

const { version } = JSON.parse(fs.readFileSync(new URL('package.json', import.meta.url)));

program
    .arguments('[folders]')
    .version(version, '-v, --version')
    .option('-i, --ignore <ignoredVars>', 'ignore variables, comma separated', '')
    .option('-e, --extension [fileTypes...]', 'file extension to search', ['scss'])
    .parse();

async function main() {
    const directories = program.args;
    const programOptions = program.opts();
    const options = {
        ignore: programOptions.ignore.split(','),
        fileExtensions: programOptions.extension
    };

    console.log('Looking for unused variables');

    const executions = await Promise.allSettled(directories.map(path => executeForPath(path, options)));
    let status = 0;

    for (const result of executions) {
        if (result.status === 'rejected') {
            console.log(picocolors.red(result.reason));
            status = 1;
        }
    }

    process.exit(status);
}

const executeForPath = async(arg, options) => {
    const dir = path.resolve(arg);
    const unusedVars = await fusv.findAsync(dir, options);

    console.log(`\nSearching for unused variables in "${picocolors.cyan(dir)}" folder, ${picocolors.cyan(options.fileExtensions.join(', '))} files...`);
    console.log(`${picocolors.cyan(unusedVars.total)} total variables.`);

    const unusedVarsNumber = unusedVars.unused.length;
    if (unusedVarsNumber > 0) {
        console.log(`${picocolors.yellow(unusedVarsNumber)} ${unusedVarsNumber > 1 ? 'are' : 'is'} not used!`);
        for (const { name, file, line } of unusedVars.unused) {
            console.log(`Variable ${picocolors.red(name)} is not being used! ${picocolors.gray(file)}:${picocolors.yellow(line)}`);
        }

        throw new Error(`Found ${unusedVarsNumber} unused variable${unusedVarsNumber > 1 ? 's' : ''} in "${picocolors.cyan(dir)}" folder`);
    }

    console.log(picocolors.green(`No unused variables found in "${dir}"!`));
};

const args = program.args.filter(arg => typeof arg === 'string');

if (args.length > 0) {
    main();
} else {
    program.help();
}