name: Keywords checker

on:
  pull_request:
    types: [opened, synchronize, reopened, edited]
    branches:
      - amd-staging
  workflow_dispatch:

jobs:
  check-keywords:
    runs-on: AMD-ROCm-Internal-dev1
    env:
      KEYWORDS: ${{ vars.KEYWORDS }}

    steps:
      - name: Checkout code
        uses: actions/checkout@v3
        with:
          fetch-depth: 0

      - name: Check keywords
        run: |
          set -e

          if [ -z "$KEYWORDS" ]; then
            echo "No keywords set. Skipping check"
            exit 0
          fi

          IFS=',' read -ra KEYWORDS_ARRAY <<< "$KEYWORDS"
          echo "Checking against list of keywords: ${KEYWORDS_ARRAY[*]}"

          MATCHED=0
          BASE_BRANCH=${{github.event.pull_request.base.ref}}
          HEAD_BRANCH=${{github.event.pull_request.head.ref}}
          PR_TITLE="${{ github.event.pull_request.title }}"

          for file in $(git diff --name-only origin/$BASE_BRANCH..origin/$HEAD_BRANCH); do
            if [ -f "$file" ]; then
              for keyword in "${KEYWORDS_ARRAY[*]}"; do
                grep -in -E "${keyword}" "$file" | while IFS= read -r line; do
                  echo "Matched in '$file': $line"
                  MATCHED=1
                done
              done
            fi
          done

          for commit in $(git log --format=%H origin/$BASE_BRANCH..origin/$HEAD_BRANCH); do
            msg=$(git log -1 --format=%B "$commit")
            for keyword in "${KEYWORDS_ARRAY[*]}"; do
              if echo "$msg" | grep -i -q "$keyword"; then
                echo "Match in commit $commit: $msg"
                MATCHED=1
              fi
            done
          done

          for keyword in "${KEYWORDS_ARRAY[*]}"; do
            if echo "$PR_TITLE" | grep -i -q "$keyword"; then
              echo "Match in PR title"
              MATCHED=1
            fi
          done
          
          if [ "$MATCHED" -eq 1 ]; then
            echo "Keywords found, please see diagnostics higher"
            exit 1
          else
            echo "No keywords found"
            exit 0
          fi