Exclude Lambda function from deploy to a particular stage

Question

I am trying to exclude a Lambda function from being deployed via serverless to my prod stage within AWS.

A snippet from my serverless yaml looks something like -

functions:
  some-prod-function:
    handler: prodFunction.handler
    events:
      - http:
          path: /prod-function
          method: post
  some-dev-function:
    handler: devFunction.handler
    events:
      - http:
          path: /dev-function
          method: post

Is there a way to exclude some-dev-function from being deployed to prod?

Answer 1

You can put those definitions on a different property and use variables in order to choose which definitions to use.

environment-functions:
  prod:
    some-prod-function:
      handler: prodFunction.handler
      events:
        - http:
            path: /prod-function
            method: post
  dev:
    some-dev-function:
      handler: devFunction.handler
      events:
        - http:
            path: /dev-function
            method: post


functions: ${self:environment-functions.${opt:stage}}      

You may need to change this depending on how you specify your stage on deployment (${opt:stage} or ${env:stage}).

Answer 2

I'm using SLS 1.32.0

I wasn't able to get functions: ${self:environment-functions.${opt:stage}} to work. (Not sure why)

It returns the following:

A valid service attribute to satisfy the declaration 'self:environment-functions.dev' could not be found.

---

However, using the same logic in dashmug's answer, file worked for me:

serverless.yml:

functions: ${file(serverless-${opt:stage}.yml)}

serverless-dev.yml:

some-dev-function:
  handler: devFunction.handler
  events:
    - http:
        path: /dev-function
        method: post

serverless-prod.yml:

some-prod-function:
  handler: prodFunction.handler
  events:
    - http:
        path: /prod-function
        method: post