name: files-changed

on:
  workflow_call:
    outputs:
      backend:
        description: "whether backend files changed"
        value: ${{ jobs.detect.outputs.backend }}
      frontend:
        description: "whether frontend files changed"
        value: ${{ jobs.detect.outputs.frontend }}
      docs:
        description: "whether docs files changed"
        value: ${{ jobs.detect.outputs.docs }}
      actions:
        description: "whether actions files changed"
        value: ${{ jobs.detect.outputs.actions }}

jobs:
  detect:
    name: detect which files changed
    runs-on: ubuntu-latest
    timeout-minutes: 3
    # Map a step output to a job output
    outputs:
      backend: ${{ steps.changes.outputs.backend }}
      frontend: ${{ steps.changes.outputs.frontend }}
      docs: ${{ steps.changes.outputs.docs }}
      actions: ${{ steps.changes.outputs.actions }}
    steps:
      - uses: actions/checkout@v3
      - uses: dorny/paths-filter@v2
        id: changes
        with:
          filters: |
            backend:
              - "**/*.go"
              - "**/*.tmpl"
              - "go.mod"
              - "go.sum"

            frontend:
              - "**/*.js"
              - "web_src/**"
              - "package.json"
              - "package-lock.json"

            docs:
              - "**/*.md"
              - "docs/**"

            actions:
              - ".github/workflows/*"
