Atlantis tries to plan template

[tekumara]

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Overview of the Issue

When using yaml anchors to create a template as per the docs, atlantis will try to plan the template and fails:

Ran Plan for 2 projects:

project: template dir: template workspace: default
project: awesome-project dir: infra/awesome-project workspace: default

1. project: template dir: template workspace: default
Plan Error

dir "template" does not exist

Reproduction Steps

1. Create a template as per the docs
2. Either
   • modify any of the files specified in autoplan -> when_modified, or
   • set --enable-regexp-cmd and then comment atlantis plan -p.*

Logs

Environment details

• Atlantis version: 0.25.0
• Deployment method: helm chart v4.15.0

Repo atlantis.yaml file:

version: 3
parallel_plan: false
parallel_apply: false
projects:
  - &template
    name: template
    dir: template
    workflow: custom
    autoplan:
      enabled: true
      when_modified:
        - "./terraform/modules/**/*.tf"
        - "**/*.tf"
        - ".terraform.lock.hcl"

  - <<: *template
    name: awesome-project
    dir: ./infra/awesome-project

workflows:
  custom:
    plan:
    apply:

Additional Context

[cShirley14]

Atlassian has an interesting approach with a definitons construct to avoid this sort of bug, would be cool to see a similar implementation in Atlantis:

• definitions construct
• anchors example