diff.yml

name: Detect Changes For PR
on:
  pull_request:
    branches: [ main ]
    paths:
      - 'schema/**'
  workflow_dispatch:

permissions:
  id-token: write
  contents: read
  pull-requests: write
  packages: read

jobs:
  get-changed-directories:
    runs-on: ubuntu-latest
    outputs:
      any_changed: ${{ steps.get-changed-directories.outputs.any_changed }}
      changed_directories: ${{ steps.set-matrix-changed-directories.outputs.changed_directories }}
    steps:
      - name: Checkout code
        uses: actions/checkout@v3
        with:
          fetch-depth: 0
      - name: Get changed directories
        id: get-changed-directories
        uses: tj-actions/changed-files@v35
        with:
          files: |
            kusto/**/*.{yml,yaml,kql}
          dir_names: 'true'
          dir_names_max_depth: '3'
      - name: Create matrix array of changed directories
        if: steps.get-changed-directories.outputs.any_changed == 'true'
        id: set-matrix-changed-directories
        env:
          ALL_CHANGED_FILES: ${{ steps.get-changed-directories.outputs.all_changed_files }}
        run: |
          echo "One or more configuration directories have changed."
          echo "Changed configuration directories: ${{ steps.get-changed-directories.outputs.all_changed_files }}"
          cdirs=$(echo $ALL_CHANGED_FILES | tr ' ' '\n' | sed 's/.*/"&"/' | paste -s -d ',' - | sed 's/.*/[&]/' | sed 's/,/, /g')
          echo "changed_directories=${cdirs}" >> "$GITHUB_OUTPUT"
  # This is the new job, only runs on changed directories.
  validate-dynamic-workflows:
    name: Diff
    if: needs.get-changed-directories.outputs.any_changed == 'true'
    runs-on: ubuntu-latest
    needs: get-changed-directories
    container:
      image: ghcr.io/github/KustoSchemaToolsAction:main
      credentials:
        username: ${{ github.actor }}
        password: ${{ secrets.github_token }}
    strategy:
      matrix: 
        directory: ${{ fromJSON(needs.get-changed-directories.outputs.changed_directories) }}
    steps:
      - name: Checkout
        uses: actions/checkout@v3
      - name: 'Azure OIDC Login'
        uses: azure/login@v1
        with:
          client-id: ${{ vars.AZURE_CLIENT_ID_OIDC }}
          tenant-id: ${{ vars.AZURE_TENANT_ID_OIDC }}
          allow-no-subscriptions: true
      
      - name: Set variables
        shell: bash
        run: |
          IFS='/' read -ra DIR <<< ${{ matrix.directory }}
          echo "CLUSTER=${DIR[1]}" >> $GITHUB_ENV
          echo "DATABASE=${DIR[2]}" >> $GITHUB_ENV

      - name: Diff database
        uses: ./.github/actions/KustoSchemaTools
        id: KustoSchemaTools
        with:        
          mode: diff
          path: kusto
          cluster: ${{ env.CLUSTER }}
          database: ${{ env.DATABASE }}

      - name: Post proposed kusto script
        if: always()
        uses: actions/github-script@v6
        env:
          REQUEST_BODY: |
              ${{ steps.KustoSchemaTools.outputs.diff }}
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            const requestBody = JSON.parse(process.env.REQUEST_BODY);
            github.rest.issues.createComment({
              issue_number: context.issue.number,
              owner: context.repo.owner,
              repo: context.repo.repo,
              body: requestBody.markDown
            })