Support ts-node app driver

Instead of requiring a build step to convert the Typescript code to javascript, it would help development cycle time if cdk.json could say something like:

{
  "app": "ts-node bin/deploy.ts"
}

[rix0rrr]

I think the missing piece of information here was “Windows”.

Your npx executable probably ends up being called npx.bat or npx.cmd. If you just type npx on the command-line, cmd.exe is going to try all the possible extensions, but our launcher won’t. Try updating your cdk.json to:

{
  "app": "npx.bat ts-node bin/my_widget_service.ts"
}

(Or npx.cmd… or maybe it’s even npx.js?)

[eladb]

Seems like the toolkit can’t find npx on your system. What node.js version are you using?

I verified the following configuration works with 0.19.0 and node.js v10.13.0:

cdk.json

{
  "app": "npx ts-node bin/hello-cdk.ts"
}

package.json:

{
  "devDependencies": {
    "@types/node": "^8.9.4",
    "aws-cdk": "^0.19.0",
    "ts-node": "^7.0.1",
    "typescript": "^3.1.2"
  },
  "dependencies": {
    "@aws-cdk/cdk": "^0.19.0"
  }
}