Revert "Revert "Fix setup on Windows and update README for Windows.""

This reverts commit 25e05fd.

README.md

@@ -37,21 +37,36 @@ aws s3 cp <s3-url> ~/aws-cdk.zip
 
 ### Install to ~/.cdk
 
-Once you've downloaded the bits, install them into `~/.cdk`:
+Once you've downloaded the bits, install them into `~/.cdk` and make sure that `~/.cdk/bin` is in your `PATH`:
+
+#### Linux/MacOS (bash/zsh)
 
 ```shell
+# Install to ~/.cdk
 rm -fr ~/.cdk
 mkdir ~/.cdk
 unzip <path-to-zip-file> -d ~/.cdk
+
+# Add ~/.cdk/bin to your PATH
+echo 'PATH=$PATH:$HOME/.cdk/bin' >> ~/.bashrc
+echo 'PATH=$PATH:$HOME/.cdk/bin' >> ~/.zshrc
 ```
 
-Make sure the `~/.cdk/bin` is in your `PATH`
+#### Windows (PowerShell)
 
-```shell
-# at the end of your ~/.bashrc or ~/.zshrc file
-export PATH=$PATH:$HOME/.cdk/bin
+```powershell
+# Install to ~/.cdk
+Remove-Item -Force -Recurse ~/.cdk
+New-Item -Type Directory ~/.cdk
+Expand-Archive -Path <path-to-zip-file> -DestinationPath ~/.cdk
+
+# Add ~/.cdk/bin to your PATH
+$profilePath = Join-Path ([Environment]::GetFolderPath([Environment+SpecialFolder]::MyDocuments)) "Profile.ps1"
+Add-Content -Path $profilePath -Value '$env:Path = "$env:Path;$env:UserProfile\.cdk\bin"'
 ```
 
+### Install the command-line toolkit and docs
+
 Install (or update) `aws-cdk` and `aws-cdk-docs` globally
 
 ```shell

bundle-beta.sh

@@ -39,6 +39,9 @@ done
 
 echo "Installing y-npm" # using y-npm, we're so META!
 ${Y_NPM} install --global-style --no-save y-npm
+# Because y-npm is installed on the build server, we need to bootstrap
+# it on windows by manually creating the shim batch file.
+cp ${root}/tools/y-npm/bin/y-npm.template.cmd node_modules/.bin/y-npm.cmd
 ln -s node_modules/.bin bin
 
 # Create a local maven repository

packages/aws-cdk/lib/init-templates/app/typescript/package.template.json

@@ -7,7 +7,7 @@
         "%name%": "bin/%name%.js"
     },
     "scripts": {
-        "prepare": "tsc && chmod a+x bin/%name%.js",
+        "build": "tsc",
         "watch": "tsc -w",
         "cdk": "cdk"
     },

packages/aws-cdk/lib/init.ts

@@ -201,7 +201,9 @@ async function postInstall(language: string) {
 }
 
 async function postInstallTypescript() {
-    const yNpm = path.join(CDK_HOME, 'bin', 'y-npm');
+    const yNpm = os.platform() === 'win32' ?
+        path.join(CDK_HOME, 'node_modules', '.bin', 'y-npm.cmd') :
+        path.join(CDK_HOME, 'bin', 'y-npm');
     const command = await fs.pathExists(yNpm) ? yNpm : 'npm';
     print(`Executing ${colors.green(`${command} install`)}...`);
     try {
@@ -245,7 +247,7 @@ function isRoot(dir: string) {
  * @returns STDOUT (if successful).
  */
 async function execute(cmd: string, ...args: string[]) {
-    const child = spawn(cmd, args, { stdio: [ 'ignore', 'pipe', 'inherit' ] });
+    const child = spawn(cmd, args, { shell: true, stdio: [ 'ignore', 'pipe', 'inherit' ] });
     let stdout = '';
     child.stdout.on('data', chunk => stdout += chunk.toString());
     return new Promise<string>((ok, fail) => {

tools/y-npm/bin/y-npm.template.cmd

@@ -0,0 +1,7 @@
+@IF EXIST "%~dp0\node.exe" (
+  "%~dp0\node.exe"  "%~dp0\..\y-npm\bin\y-npm" %*
+) ELSE (
+  @SETLOCAL
+  @SET PATHEXT=%PATHEXT:;.JS;=;%
+  node "%~dp0\..\y-npm\bin\y-npm" %*
+)

tools/y-npm/lib/run-npm-command.ts

@@ -80,7 +80,9 @@ export function runCommand(command: string, args: string[], additionalEnv?: Node
                     env[key] = value;
                 }
             }
-            const child = spawn(command, args, { detached: false, env, stdio: ['inherit', 'pipe', 'pipe'] });
+            // `shell: true` is required because on Windows, batch files must be run from a shell, and y-npm
+            // is invoked using the batch file y-npm.cmd (to work around symlink issues on Windows).
+            const child = spawn(command, args, { detached: false, env, shell: true, stdio: ['inherit', 'pipe', 'pipe'] });
             debug(`Command PID: ${child.pid}`);
             const stdout = new Array<Buffer>();
             const stderr = new Array<Buffer>();