Install global npm dependencies from package.json

npm-global-install.js

#!/usr/bin/node

const fs = require('fs');
const path = require('path');
const shell = require('shelljs');
const cp = require('child_process');

const c_Usage = "USAGE: ./npm-global-install.js <path-to-package.json>";
const c_start_time = new Date().getTime() / 1000;

function Log()
{
    let t = new Date().getTime() / 1000;
    console.log(`[${(t-c_start_time).toFixed(3)}]`, ...arguments);
}

function npmInstall(deps)
{
    if (!deps)
    {
        Log("No dependencies");
        return false;
    }

    Log('Installing : ', deps.join(', '));

    // Install dependencies
    let sub = cp.spawn('npm', ['install', '--global'].concat(deps),
                        {
                            stdio: ['ignore', process.stdio, process.stderr]
                        });

    sub.on('exit', (code) =>
        {   Log(`npm exited with code: ${code}`);
            if (code)
                process.exit(code);
        });

    return true;
}

function getDeps(pf)
{
    let data = JSON.parse(fs.readFileSync(pf, 'utf8'));

    let deps = [];
    for (let k in data['dependencies'])
        deps.push(`${k}@${data['dependencies'][k]}`);

    for (let k in data['devDependencies'])
        deps.push(`${k}@${data['devDependencies'][k]}`);

    return deps;
}

function main()
{
    // Ensure parameters
    if (process.argv.length <= 2)
    {
        Log(c_Usage);
        process.exit(-1);
    }

    let pf = process.argv[2];
    if (!fs.existsSync(pf))
    {
        Log(`File not found : ${pf}`);
        process.exit(-1);
    }

    Log(`Installing dependencies from ${pf}`);

    let deps = getDeps(pf);
    npmInstall(deps);

    return 0;
}

// Exit handling
process.on('cleanup',function() { Log('~ cleanup ~');});
process.on('exit',function() { Log('~ exit ~');});
process.on('SIGINT',function() { Log('~ ctrl+c ~'); process.exit(-1); });
process.on('uncaughtException',function(e) { Log('~ uncaught ~', e); process.exit(-1); });

return main();