[GitHub] [incubator-openwhisk] rabbah opened a new issue #4349: override action entry point on web action invoke

[GitBox <gi...@apache.org>]

rabbah opened a new issue #4349: override action entry point on web action invoke
URL: https://github.com/apache/incubator-openwhisk/issues/4349
 
 
   When one creates an action, they can specify the main entry point. For example
   ```
     wsk action create myfn f.js --main foo
   ```
   
   This allows a single file with multiple functions to be used as different actions.
   
   But this is wasteful - one has to create multiple actions this way and we're paying the cost in the backend by replicating the code.
   
   What if the `main` was specified on invoke instead? For example, take a web action from this file `hello.js`
   
   ```js
   function niam(args) { return { 'greetings': 'Hello from a non-standard entrypoint.' } }
   function main(args) { return { 'greetings': 'Hello from a standard entrypoint.' } }
   ```
   
   ```
     wsk action create hello --web true hello.js
   ```
   
   We could allow `main` to be set on the action activation. 
   
   ```
   > curl -k https://guest.localhost/default/hello.json
   {
     "greetings": "Hello from a standard entrypoint."
   }
   ```
   
   And now with an override to "main", using `@<new main>` as the new entry point.
   
   ```
   > curl -k https://guest.localhost/default/hello.json@niam
   {
     "greetings": "Hello from a non-standard entrypoint."
   }
   ```
   

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