NVM list global packages

nvm-list

#!/usr/bin/env node
const { promises: fs } = require('fs');
const path = require('path');

(async () => {
    const nvmPath = process.env.NVM_DIR;

    if (!nvmPath) {
        console.error('Unable to detect nvm path. Exiting.');
        process.exit(1);
    }

    const onlyNpm = {};
    const nothing = {};
    const apps = await fs.readdir(path.resolve(nvmPath, 'versions'));

    for await (const app of apps) {

        const versions = await fs.readdir(path.resolve(nvmPath, 'versions', app));

        for (const version of versions) {

            const packagesPath = [nvmPath, 'versions', app, version, 'lib', 'node_modules'];
            const packages = await fs.readdir(path.resolve(...packagesPath));

            const hasOnlyNpm = packages.length === 1 && packages[0] === 'npm';
            const hasNothing = !packages.length;

            if (hasOnlyNpm) {
                if (!onlyNpm[app]) {
                    onlyNpm[app] = [];
                }
                onlyNpm[app].push(version);
                continue;
            } else if (hasNothing) {
                if (!nothing[app]) {
                    nothing[app] = [];
                }
                nothing[app].push(version);
                continue;
            }

            console.log(version);
            console.log(Array(version.length + 1).join('='))

            for (const p of packages) {
                console.log(p);
                if ('@' === p[0]) {
                    const subpackages = await fs.readdir(path.resolve(...packagesPath, p));
                    for (const s of subpackages) {
                        console.log(`    ${s}`);
                    }
                }
            }

            console.log('');

        }
    }

    if (Object.keys(onlyNpm).length) {
        console.log(`Only npm\n========`);
        for (const app in onlyNpm) {
            console.log(`${app}: ${onlyNpm[app].join(', ')}`);
        }
        console.log('');
    }

    if (Object.keys(nothing).length) {
        console.log(`No package\n==========`);
        for (const app in nothing) {
            console.log(`${app}: ${nothing[app].join(', ')}`);
        }
        console.log('');
    }

    process.exit(0);
})();