update-build-files.yml

name: Update WordPress i18n build files

on:
  schedule:
    - cron: "0 0 * * *"  # Runs every day at midnight.

  # Allows you to run this workflow manually from the Actions tab.
  workflow_dispatch:

env:
  OWNER: ${{ github.repository_owner }}
  REPO: ${{ github.repository }}
  TOKEN: ${{ secrets.GITHUB_TOKEN }}

permissions:
  contents: write
  pull-requests: write

jobs:

  check-file-updates:
    name: Check for file updates
    runs-on: ubuntu-latest

    outputs:
      files_changed: ${{ steps.compare-files.outputs.files_changed }}

    steps:

    - name: Checkout trunk branch
      uses: actions/checkout@v4
      with:
        ref: trunk
        fetch-depth: 0

    - name: Download WordPress build files from Trunk
      id: download-files
      run: |
        mkdir downloads
        curl -o downloads/readme.html https://raw.githubusercontent.com/WordPress/wordpress-develop/trunk/src/readme.html
        curl -o downloads/wp-config-sample.php https://raw.githubusercontent.com/WordPress/wordpress-develop/trunk/wp-config-sample.php

    - name: Check if source files have changed
      id: compare-files
      run: |
        if ! cmp -s downloads/readme.html trunk/readme.html || ! cmp -s downloads/wp-config-sample.php trunk/wp-config-sample.php; then
          echo "The build files have been updated!"
          echo "files_changed=true" >> $GITHUB_OUTPUT
        else
          echo "The build files remain unchanged."
          echo "files_changed=false" >> $GITHUB_OUTPUT
        fi

    - name: Save workspace files to artifact
      uses: actions/upload-artifact@v4
      id: upload-artifact
      if: steps.compare-files.outputs.files_changed == 'true'
      with:
        name: workspace-files
        path: downloads/

    - name: Steps debug info
      run: |
        echo "Steps: ${{ toJson(steps) }}"

  commit-updated-files:
    name: Commit updated files
    runs-on: ubuntu-latest
    needs: check-file-updates
    if: ${{ needs.check-file-updates.outputs.files_changed == 'true' }}

    steps:

    - name: Checkout trunk branch
      uses: actions/checkout@v4
      with:
        ref: trunk
        fetch-depth: 0

    - name: Get workspace files from artifact
      uses: actions/download-artifact@v4
      id: download-artifact
      with:
        name: workspace-files
        path: trunk

    - name: Commit updated source files
      uses: stefanzweifel/git-auto-commit-action@v5
      with:
        commit_message: Update local files with remote changes from Trunk

    - name: Steps debug info
      run: |
        echo "Steps: ${{ toJson(steps) }}"

  create-pull-request:
    name: Create Pull Request
    runs-on: ubuntu-latest
    needs: commit-updated-files
    if: ${{ needs.commit-updated-files.result == 'success' }}

    steps:

      - name: Check if Pull Request exists
        id: check_pr
        run: |
          BRANCH=main
          RESPONSE=$(curl -X GET -H "Authorization: token $TOKEN" "https://api.github.com/repos/$REPO/pulls?head=$OWNER:trunk")
          PR_NUMBER=$(echo "$RESPONSE" | jq -r '.[].number')
          if [ -n "$PR_NUMBER" ]; then
            echo "PR number found: $PR_NUMBER"
            echo "pr_number=$PR_NUMBER" >> $GITHUB_OUTPUT
          else
            echo "No pull request found."
          fi


      - name: Create new Pull Request
        id: create_pr
        if: steps.check_pr.outputs.pr_number == ''
        run: |
          BRANCH=main
          TITLE="Actualizar ficheiros originais em inglês"
          BODY="Este pull request automático submete alterações do branch 'trunk' para o 'main'."
          URL="https://api.github.com/repos/$REPO/pulls"
          RESPONSE=$(curl -X POST -H "Authorization: token $TOKEN" -d "{\"title\":\"$TITLE\",\"body\":\"$BODY\",\"head\":\"trunk\",\"base\":\"$BRANCH\"}" $URL)
          echo $RESPONSE

      - name: Steps debug info
        run: |
          echo "Steps: ${{ toJson(steps) }}"