portable mode

src/cli.js

@@ -3,6 +3,37 @@
  *  Licensed under the MIT License. See License.txt in the project root for license information.
  *--------------------------------------------------------------------------------------------*/
 
+Error.stackTraceLimit = 100; // increase number of stack frames (from 10, https://github.com/v8/v8/wiki/Stack-Trace-API)
+
+const fs = require('fs');
+const path = require('path');
+const product = require('../product.json');
+const appRoot = path.dirname(__dirname);
+
+function getApplicationPath() {
+	if (process.env['VSCODE_DEV']) {
+		return appRoot;
+	} else if (process.platform === 'darwin') {
+		return path.dirname(path.dirname(path.dirname(appRoot)));
+	} else {
+		return path.dirname(path.dirname(appRoot));
+	}
+}
+
+function getPortableDataPath() {
+	return path.join(path.dirname(getApplicationPath()), product.portable);
+}
+
+if (product.portable) {
+	const portablePath = getPortableDataPath();
+	try { fs.mkdirSync(portablePath); } catch (err) { if (err.code !== 'EEXIST') { throw err; } }
+
+	const tmpdir = path.join(portablePath, 'tmp');
+	try { fs.mkdirSync(tmpdir); } catch (err) { if (err.code !== 'EEXIST') { throw err; } }
+
+	process.env[process.platform === 'win32' ? 'TEMP' : 'TMPDIR'] = tmpdir;
+}
+
 //#region Add support for using node_modules.asar
 (function () {
 	const path = require('path');