Relax atlantis.yaml validation

[liaden]

I want to use the gitlab style approach of defining some common configuration to DRY my atlantis.yaml, but atlantis isn't too happy.

Given a config with:

.default-autoplan: &default-autoplan
    autoplan:
      when_modified:
        - "../modules/**/*.tf"
        - "**/*.tf*"
        
projects:
  - <<: *default-autoplan
    dir: infra
  - <<: *default-autoplan
    dir: production
  - <<: *default-autoplan
    dir: staging

I get the following error:

  line 5: field .default-autoplan not found in type raw.RepoCfg

[clatour]

It seems like atlantis doesn't like the top-level key you've referenced here, but something like this works:

version: 3
automerge: true
parallel_apply: true
parallel_plan: false
projects:
  - &default-project
    dir: infra
    terraform_version: v0.15.1
    autoplan: &default-autoplan
      enabled: false
      when_modified:
        - "../modules/**/*.tf"
        - "**/*.tf*"
    apply_requirements: [mergeable]
  - <<: *default-project
    dir: production
  - <<: *default-project
    dir: staging
    autoplan: *default-autoplan

[acastle]

This looks like a one liner change if we wanted to proceed down this path

atlantis/server/events/yaml/parser_validator.go

Line 106 in 632460b

if err := yaml.UnmarshalStrict(configData, &rawCfg); err != nil {

I'm curious if @lkysow has any background knowledge here since it looks like there was a deliberate choice made to strictly validate all of the fields in the config.