Add after-prepare hook to change the entry-point of application

Add after-prepare hook that will change the entry point of application in case `test` command is executed.
Use `nativescript-hook` dependency in order to install the hook.

Author: rosen-vladimirov

.gitignore

@@ -29,3 +29,5 @@ test-reports.xml
 
 npm-debug.log
 node_modules
+!preuninstall.js
+!postinstall.js

lib/after-prepare.ts

@@ -0,0 +1,15 @@
+import * as path from "path";
+import * as fs from "fs";
+
+module.exports = function ($platformsData, $testExecutionService) {
+	if($testExecutionService && $testExecutionService.platform) {
+		let platformData = $platformsData.getPlatformData($testExecutionService.platform),
+			projectFilesPath = path.join(platformData.appDestinationDirectoryPath, "app"),
+			packageJsonPath = path.join(projectFilesPath, 'package.json'),
+			packageJson = JSON.parse(fs.readFileSync(packageJsonPath).toString());
+
+		// When test command is used in ns-cli, we should change the entry point of the application
+		packageJson.main = "./tns_modules/nativescript-unit-test-runner/app.js";
+		fs.writeFileSync(packageJsonPath, JSON.stringify(packageJson));
+	}
+}

package.json

@@ -4,7 +4,9 @@
   "description": "NativeScript unit test runner component.",
   "main": "app.js",
   "scripts": {
-    "test": "exit 0"
+    "test": "exit 0",
+    "preuninstall": "node preuninstall.js",
+    "postinstall": "node postinstall.js"
   },
   "repository": {
     "type": "git",
@@ -14,12 +16,25 @@
   "license": "Apache-2.0",
   "devDependencies": {
     "grunt": "^0.4.5",
+    "grunt-contrib-clean": "^1.0.0",
+    "grunt-contrib-watch": "^0.6.1",
+    "grunt-shell": "^1.1.2",
     "grunt-ts": "^5.0.1"
   },
   "nativescript": {
     "platforms": {
-        "android": "1.6.0",
-        "ios": "1.6.0"
-    }
+      "android": "1.6.0",
+      "ios": "1.6.0"
+    },
+    "hooks": [
+      {
+        "type": "after-prepare",
+        "script": "lib/after-prepare.js",
+        "inject": true
+      }
+    ]
+  },
+  "dependencies": {
+    "nativescript-hook": "^0.2.1"
   }
 }

postinstall.js

@@ -0,0 +1,87 @@
+var hook = require('nativescript-hook')(__dirname);
+hook.postinstall();
+
+var fs = require('fs');
+var path = require('path');
+
+var projectDir = hook.findProjectDir();
+if (projectDir) {
+	createTsconfig();
+	createReferenceFile();
+	installTypescript();
+}
+
+function createReferenceFile() {
+	var referenceFilePath = path.join(projectDir, 'references.d.ts'),
+		content = '/// <reference path="./node_modules/tns-core-modules/tns-core-modules.d.ts" /> Needed for autocompletion and compilation.';
+
+	if (!fs.existsSync(referenceFilePath)) {
+		fs.appendFileSync(referenceFilePath, content);
+	}
+}
+
+function createTsconfig() {
+	var tsconfigPath = path.join(projectDir, 'tsconfig.json');
+	var tsconfig = {};
+
+	if (fs.existsSync(tsconfigPath)) {
+		try {
+			tsconfig = JSON.parse(fs.readFileSync(tsconfigPath))
+		} catch (err) {
+			console.warn('tsconfig.json: ' + err.toString());
+		}
+	}
+
+	tsconfig.compilerOptions = tsconfig.compilerOptions || {
+		module: "commonjs",
+		target: "es5",
+		sourceMap: true,
+		experimentalDecorators: true,
+		noEmitHelpers: true,
+	};
+
+	tsconfig.exclude = ['node_modules', 'platforms'];
+
+	var coreModulesPath = 'node_modules/tns-core-modules/';
+	var coreModulesTypingsPath = 'node_modules/tns-core-modules/tns-core-modules.d.ts';
+
+	try {
+		var coreModulesPackageJson = JSON.parse(fs.readFileSync(path.join(projectDir, coreModulesPath, 'package.json')));
+		if (coreModulesPackageJson.typings) {
+			coreModulesTypingsPath = coreModulesPath + coreModulesPackageJson.typings;
+		}
+	} catch (err) {
+		console.warn('tns-core-modules/package.json: ' + err.toString());
+	}
+
+	fs.writeFileSync(tsconfigPath, JSON.stringify(tsconfig, null, 4));
+}
+
+function getProjectTypeScriptVersion() {
+	try {
+		var packageJsonPath = path.join(projectDir, "package.json"),
+			packageJsonContent = fs.readFileSync(packageJsonPath, "utf8"),
+			jsonContent = JSON.parse(packageJsonContent);
+
+		return (jsonContent.dependencies && jsonContent.dependencies.typescript)
+			|| (jsonContent.devDependencies && jsonContent.devDependencies.typescript);
+	} catch(err) {
+		console.error(err);
+		return null;
+	}
+}
+
+function installTypescript() {
+	var installedTypeScriptVersion = getProjectTypeScriptVersion();
+	if(installedTypeScriptVersion) {
+		console.log("Project already targets TypeScript " + installedTypeScriptVersion);
+	} else {
+		require('child_process').exec('npm install --save-dev typescript', { cwd: projectDir }, function (err, stdout, stderr) {
+			if (err) {
+				console.warn('npm: ' + err.toString());
+			}
+			process.stdout.write(stdout);
+			process.stderr.write(stderr);
+		});
+	}
+}

preuninstall.js

@@ -0,0 +1 @@
+require('nativescript-hook')(__dirname).preuninstall();