Workaround boolean flags not available in TS 2.0

microsoft/TypeScript#11798

Author: jasssonpet

lib/compiler.js

@@ -30,14 +30,12 @@ function runTypeScriptCompiler(logger, projectDir, options) {
 
 		if (!options.release) {
 			// For debugging in Chrome DevTools
-			nodeArgs.push(
-				'--sourceMap', 'false',
-				'--inlineSourceMap', 'true',
-				'--inlineSources', 'true'
-			);
+			nodeArgs.push('--inlineSourceMap', '--inlineSources');
 		}
 
+		logger.trace(process.execPath, nodeArgs.join(' '));
 		var tsc = spawn(process.execPath, nodeArgs);
+
 		var isResolved = false;
 		tsc.stdout.on('data', function(data) {
 			var stringData = data.toString();

postinstall.js

@@ -6,7 +6,12 @@ var path = require('path');
 
 var projectDir = hook.findProjectDir();
 if (projectDir) {
-	createTsconfig();
+	var tsconfigPath = path.join(projectDir, 'tsconfig.json');
+	if (fs.existsSync(tsconfigPath)) {
+		migrateTsconfig(tsconfigPath);
+	} else {
+		createTsconfig(tsconfigPath);
+	}
 	createReferenceFile();
 	installTypescript();
 }
@@ -20,8 +25,27 @@ function createReferenceFile() {
 	}
 }
 
-function createTsconfig() {
-	var tsconfigPath = path.join(projectDir, 'tsconfig.json');
+function migrateTsconfig(tsconfigPath) {
+	try {
+		var existingConfigContents = fs.readFileSync(tsconfigPath);
+		var existingConfig = JSON.parse(existingConfigContents);
+	} catch (e) {
+		console.error("Invalid " + tsconfigPath + ": " + e);
+		return;
+	}
+
+	if (existingConfig["compilerOptions"]) {
+		if ("sourceMap" in existingConfig["compilerOptions"]) {
+			delete existingConfig["compilerOptions"]["sourceMap"];
+			console.warn("> Deleted \"compilerOptions.sourceMap\" setting in \"" + tsconfigPath + "\".");
+			console.warn("> Inline source maps will be used when building in Debug configuration from now on.");
+		}
+	}
+
+	fs.writeFileSync(tsconfigPath, JSON.stringify(existingConfig, null, 4));
+}
+
+function createTsconfig(tsconfigPath) {
 	var tsconfig = {};
 
 	tsconfig.compilerOptions = {
@@ -35,9 +59,7 @@ function createTsconfig() {
 
 	tsconfig.exclude = ['node_modules', 'platforms', "**/*.aot.ts"];
 
-	if (!fs.existsSync(tsconfigPath)) {
-		fs.appendFileSync(tsconfigPath, JSON.stringify(tsconfig, null, 4));
-	}
+	fs.writeFileSync(tsconfigPath, JSON.stringify(tsconfig, null, 4));
 }
 
 function getProjectTypeScriptVersion() {