action.yml

name: 'Changelog Check'
description: 'Check if changelog is updated for the changed packages'
inputs:
  pr_number:
    description: 'Pull request number'
    required: true

runs:
  using: 'composite'
  steps:
    - name: Checkout code
      uses: actions/checkout@v4
      with:
        fetch-depth: 0  # Fetch full history to access all commits

    - name: Determine Base SHA and Merge Base
      id: determine_base
      run: |
        if [ -n "${{ github.event.pull_request.base.sha }}" ]; then
          BASE_SHA="${{ github.event.pull_request.base.sha }}"
          MERGE_BASE=$(git merge-base $BASE_SHA ${{ github.sha }})
          echo "BASE_SHA=$BASE_SHA" >> $GITHUB_ENV
          echo "MERGE_BASE=$MERGE_BASE" >> $GITHUB_ENV
        else
          echo "Not running in a PR context or unable to determine base SHA. Skipping changelog check."
          echo "SKIP_CHANGELOG_CHECK=true" >> $GITHUB_ENV
        fi
      shell: bash

    - name: Check if 'skip changelog' label is present
      id: check_labels
      run: |
        SKIP_CHANGELOG_LABEL="${{ contains(github.event.pull_request.labels.*.name, 'skip changelog') }}"
        if [ "$SKIP_CHANGELOG_LABEL" = "true" ]; then
          echo "Skip changelog label is present. Skipping changelog check."
          echo "SKIP_CHANGELOG_CHECK=true" >> $GITHUB_ENV
        fi
      shell: bash

    - name: Debugging Info
      run: |
        echo "Base SHA: ${{ env.BASE_SHA }}"
        echo "Current SHA: ${{ github.sha }}"
        echo "Merge Base: ${{ env.MERGE_BASE }}"
        echo "SKIP_CHANGELOG_CHECK: ${{ env.SKIP_CHANGELOG_CHECK }}"
      shell: bash

    - name: Check if changelog is updated
      if: ${{ env.SKIP_CHANGELOG_CHECK != 'true' }}
      run: |
        CHANGED_FILES=$(git diff --name-only ${{ env.MERGE_BASE }} ${{ github.sha }})
        if [ -z "$CHANGED_FILES" ]; then
          echo "No changed files detected."
          exit 0
        fi
        echo "Changed files: $CHANGED_FILES"
        
        PUBLIC_PACKAGES=("commerce-sdk-react" "pwa-kit-create-app" "pwa-kit-dev" "pwa-kit-react-sdk" "pwa-kit-runtime" "template-retail-react-app")

        for PACKAGE in "${PUBLIC_PACKAGES[@]}"; do
          if echo "$CHANGED_FILES" | grep -iq "^packages/$PACKAGE/"; then
            if ! echo "$CHANGED_FILES" | grep -iq "^packages/$PACKAGE/CHANGELOG.md"; then
              echo "CHANGELOG.md was not updated for package $PACKAGE. Please update the CHANGELOG.md or add 'skip changelog' label to the PR."
              exit 1
            fi
          fi
        done
      shell: bash