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index.js
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index.js
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'use strict';
const {promisify} = require('util');
const path = require('path');
const childProcess = require('child_process');
const fs = require('fs');
const isWsl = require('is-wsl');
const isDocker = require('is-docker');
const pAccess = promisify(fs.access);
const pExecFile = promisify(childProcess.execFile);
// Path to included `xdg-open`.
const localXdgOpenPath = path.join(__dirname, 'xdg-open');
// Convert a path from WSL format to Windows format:
// `/mnt/c/Program Files/Example/MyApp.exe` → `C:\Program Files\Example\MyApp.exe`
const wslToWindowsPath = async path => {
const {stdout} = await pExecFile('wslpath', ['-w', path]);
return stdout.trim();
};
module.exports = async (target, options) => {
if (typeof target !== 'string') {
throw new TypeError('Expected a `target`');
}
options = {
wait: false,
background: false,
url: false,
...options
};
let command;
let appArguments = [];
const cliArguments = [];
const childProcessOptions = {};
if (Array.isArray(options.app)) {
appArguments = options.app.slice(1);
options.app = options.app[0];
}
// Encodes the target as if it were an URL. Especially useful to get
// double-quotes through the “double-quotes on Windows caveat”, but it
// can be used on any platform.
if (options.url) {
target = encodeURI(target);
}
if (process.platform === 'darwin') {
command = 'open';
if (options.wait) {
cliArguments.push('--wait-apps');
}
if (options.background) {
cliArguments.push('--background');
}
if (options.app) {
cliArguments.push('-a', options.app);
}
} else if (process.platform === 'win32' || (isWsl && !isDocker)) {
command = 'cmd' + (isWsl ? '.exe' : '');
cliArguments.push('/s', '/c', 'start', '""', '/b');
if (!isWsl) {
// Always quoting target allows for URLs/paths to have spaces and unmarked characters, as `cmd.exe` will
// interpret them as plain text to be forwarded as one unique argument. Enabling `windowsVerbatimArguments`
// disables Node.js's default quotes and escapes handling (https://git.io/fjdem).
// References:
// - Issues #17, #44, #55, #77, #101, #115
// - Pull requests: #74, #98
//
// As a result, all double-quotes are stripped from the `target` and do not get to your desired destination.
target = `"${target}"`;
childProcessOptions.windowsVerbatimArguments = true;
}
if (options.wait) {
cliArguments.push('/wait');
}
if (options.app) {
if (isWsl && options.app.startsWith('/mnt/')) {
const windowsPath = await wslToWindowsPath(options.app);
options.app = windowsPath;
}
cliArguments.push(options.app);
}
if (appArguments.length > 0) {
cliArguments.push(...appArguments);
}
} else {
if (options.app) {
command = options.app;
} else {
// When bundled by Webpack, there's no actual package file path and no local `xdg-open`.
const isBundled = !__dirname || __dirname === '/';
// Check if local `xdg-open` exists and is executable.
let exeLocalXdgOpen = false;
try {
await pAccess(localXdgOpenPath, fs.constants.X_OK);
exeLocalXdgOpen = true;
} catch (_) {}
const useSystemXdgOpen = process.versions.electron ||
process.platform === 'android' || isBundled || !exeLocalXdgOpen;
command = useSystemXdgOpen ? 'xdg-open' : localXdgOpenPath;
}
if (appArguments.length > 0) {
cliArguments.push(...appArguments);
}
if (!options.wait) {
// `xdg-open` will block the process unless stdio is ignored
// and it's detached from the parent even if it's unref'd.
childProcessOptions.stdio = 'ignore';
childProcessOptions.detached = true;
}
}
cliArguments.push(target);
if (process.platform === 'darwin' && appArguments.length > 0) {
cliArguments.push('--args', ...appArguments);
}
const subprocess = childProcess.spawn(command, cliArguments, childProcessOptions);
if (options.wait) {
return new Promise((resolve, reject) => {
subprocess.once('error', reject);
subprocess.once('close', exitCode => {
if (exitCode > 0) {
reject(new Error(`Exited with code ${exitCode}`));
return;
}
resolve(subprocess);
});
});
}
subprocess.unref();
return subprocess;
};