Add fn::concat support

[kpitzen]

Hello!

• Vote on this issue by adding a 👍 reaction
• If you want to implement this feature, comment to let us know (we'll work with you on design, scheduling, etc.)

Issue details

I would like to have the ability to combine arrays in a given environment.

One could imagine one environment, test-0 with the following config:

  pulumiConfig:
    examples-0:
      - foo
      - bar

and a second environment, test-1 which imports test-0 and would like to do the following:

  pulumiConfig:
    examples-1:
      -baz
    examples:
      fn::concat:
        - ${pulumiConfig.examples-0}
        - ${pulumiConfig.examples-1}

Where the resulting config would be rendered as:

  pulumiConfig:
    examples-1:
      -baz
    examples:
      - foo
      - bar
      - baz

Affected area/feature

ESC