# Runs if there are changes to the paths: list.
# Starts a matrix job to check for modified files, then sets output based on the results.
# The input decides if the label job is ran, adding a label to the PR.
---

name: Protect Files

on:
  pull_request:
    types: 
      - opened
      - synchronize
    paths: 
      - "util/Migrator/DbScripts/**.sql"

jobs:
  changed-files:
    name: Check for file changes
    runs-on: ubuntu-20.04
    outputs:
      changes: steps.check-changes.outputs.changes_detected

    strategy:
      fail-fast: true
      matrix:
        include:
          - name: Database Scripts
            path: util/Migrator/DbScripts
            label: "DB migrations changed"
    steps:
      - name: Checkout PR
        uses: actions/checkout@2541b1294d2704b0964813337f33b291d3f8596b
        with:
          fetch-depth: 0

      - name: Check for file changes
        id: check-changes
        run: |
          MODIFIED_FILES=$(git diff --name-only --diff-filter=M ${GITHUB_BASE_REF})

          for file in $MODIFIED_FILES; do
            if [[ $file == *"${{ matrix.path }}"*]]; then
              echo "::set-output name=changes_detected::'true'"
              break
            else echo "::set-output name=changes_detected::'false'"
            fi
          done

  label-pr:
    name: Add label to pull request
    runs-on: ubuntu-20.04
    needs: 
      - changed-files
    if: needs.changed-files.outputs.changes == "true" || job.changed-files.status == "failure"
    steps:
      - name: Label PR
        uses: andymckay/labeler@e6c4322d0397f3240f0e7e30a33b5c5df2d39e90
        with:
          add-labels: ${{ matrix.label }}