source: trip-planner-front/node_modules/opn/index.js@ 8d391a1

'use strict';
const path = require('path');
const childProcess = require('child_process');
const isWsl = require('is-wsl');

module.exports = (target, opts) => {
        if (typeof target !== 'string') {
                return Promise.reject(new Error('Expected a `target`'));
        }

        opts = Object.assign({wait: true}, opts);

        let cmd;
        let appArgs = [];
        let args = [];
        const cpOpts = {};

        if (Array.isArray(opts.app)) {
                appArgs = opts.app.slice(1);
                opts.app = opts.app[0];
        }

        if (process.platform === 'darwin') {
                cmd = 'open';

                if (opts.wait) {
                        args.push('-W');
                }

                if (opts.app) {
                        args.push('-a', opts.app);
                }
        } else if (process.platform === 'win32' || isWsl) {
                cmd = 'cmd' + (isWsl ? '.exe' : '');
                args.push('/c', 'start', '""', '/b');
                target = target.replace(/&/g, '^&');

                if (opts.wait) {
                        args.push('/wait');
                }

                if (opts.app) {
                        args.push(opts.app);
                }

                if (appArgs.length > 0) {
                        args = args.concat(appArgs);
                }
        } else {
                if (opts.app) {
                        cmd = opts.app;
                } else {
                        const useSystemXdgOpen = process.versions.electron || process.platform === 'android';
                        cmd = useSystemXdgOpen ? 'xdg-open' : path.join(__dirname, 'xdg-open');
                }

                if (appArgs.length > 0) {
                        args = args.concat(appArgs);
                }

                if (!opts.wait) {
                        // `xdg-open` will block the process unless
                        // stdio is ignored and it's detached from the parent
                        // even if it's unref'd
                        cpOpts.stdio = 'ignore';
                        cpOpts.detached = true;
                }
        }

        args.push(target);

        if (process.platform === 'darwin' && appArgs.length > 0) {
                args.push('--args');
                args = args.concat(appArgs);
        }

        const cp = childProcess.spawn(cmd, args, cpOpts);

        if (opts.wait) {
                return new Promise((resolve, reject) => {
                        cp.once('error', reject);

                        cp.once('close', code => {
                                if (code > 0) {
                                        reject(new Error('Exited with code ' + code));
                                        return;
                                }

                                resolve(cp);
                        });
                });
        }

        cp.unref();

        return Promise.resolve(cp);
};