build.yml

name: Build

on:
  pull_request:
    branches:
      - main

jobs:
  bicep-build:
    name: Bicep Build
    runs-on: ubuntu-latest
    env:
      BICEP_FILE_PATH: main.bicep
      OUTPUT_FILE_PATH: azuredeploy.json
    steps:
      - name: Checkout
        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
        with:
          ref: ${{ github.head_ref }} # Required to push commit to PR

      - name: Build Bicep file
        id: build
        shell: bash {0} # Required to check exit code
        run: |
          git fetch origin "$GITHUB_BASE_REF"
          git diff --exit-code --merge-base "origin/$GITHUB_BASE_REF" "$BICEP_FILE_PATH"
          exit_code="$?"
          if [[ "$exit_code" == 0 ]]; then
            echo "No changes made to Bicep file. Skipping build."
            exit "$exit_code"
          fi

          az bicep build --file "$BICEP_FILE_PATH" --outfile "$OUTPUT_FILE_PATH"
          exit_code="$?"
          if [[ "$exit_code" != 0 ]]; then
            exit "$exit_code"
          fi

          git diff --exit-code "$OUTPUT_FILE_PATH"
          exit_code="$?"

          echo "exit-code=$exit_code" >> "$GITHUB_OUTPUT"

      - name: Push commit
        if: steps.build.outputs.exit-code != 0
        run: |
          git config user.name "github-actions[bot]"
          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
          git add "$OUTPUT_FILE_PATH"
          git commit -m "Build Bicep file"
          git push