name: Performance Test

on: [pull_request]

jobs:
  speed:
    #   skip if PR is from a fork.
    # TODO: this could probabaly be refactored a bit so that it runs on forks
    if: ${{ ! github.event.pull_request.head.repo.fork }}

    runs-on: ubuntu-latest
    steps:
      - name: Install Go
        uses: actions/setup-go@v5
        with:
          go-version: "1.22"

      - name: Checkout code
        uses: actions/checkout@v4
        with:
          fetch-depth: 0
          ref: ${{ github.head_ref }}

      - name: Run Head
        run: |
          go build -o current .
          repo_tmp=$(mktemp -d)
          git clone https://github.com/trufflesecurity/trufflehog.git $repo_tmp

          user_time_sum=0

          for i in {1..5}
          do
            tmpfile=$(mktemp)
            /usr/bin/time -o $tmpfile $GITHUB_WORKSPACE/current git "file://$repo_tmp" --no-verification --no-update > out.txt
            cat $tmpfile
            time_output=$(cat $tmpfile)
            rm $tmpfile
            user_time=$(echo $time_output | awk '{print $1}' | sed 's/user//')

            # Add the user time to the sum
            user_time_sum=$(echo "$user_time_sum + $user_time" | bc)
          done

          average_user_time=$(echo "scale=3; $user_time_sum / 5" | bc)
          echo HEAD_TIME=$average_user_time >> $GITHUB_ENV

      - name: Figure out previous tag
        run: |
          git fetch --tags
          git tag -l --sort=-v:refname | head -n 1 > previous_tag.txt
          echo PREVIOUS_TAG=$(cat previous_tag.txt) >> $GITHUB_ENV

      - name: Checkout code
        uses: actions/checkout@v4
        with:
          fetch-depth: 0
          ref: ${{ env.PREVIOUS_TAG }}

      - name: Run Previous
        run: |
          go build -o previous .
          repo_tmp=$(mktemp -d)
          git clone https://github.com/trufflesecurity/trufflehog.git $repo_tmp

          user_time_sum=0

          for i in {1..5}
          do
            tmpfile=$(mktemp)
            /usr/bin/time -o $tmpfile $GITHUB_WORKSPACE/previous git "file://$repo_tmp" --no-verification --no-update > out.txt
            cat $tmpfile
            time_output=$(cat $tmpfile)
            rm $tmpfile
            user_time=$(echo $time_output | awk '{print $1}' | sed 's/user//')

            # Add the user time to the sum
            user_time_sum=$(echo "$user_time_sum + $user_time" | bc)
          done

          average_user_time=$(echo "scale=3; $user_time_sum / 5" | bc)
          echo PREVIOUS_TIME=$average_user_time >> $GITHUB_ENV

      - name: Compare Results
        run: |
          echo "head ($GITHUB_SHA) avg time (n=5): $HEAD_TIME"
          echo "$PREVIOUS_TAG avg time (n=5): $PREVIOUS_TIME"
          if [ $(echo "$HEAD_TIME > $PREVIOUS_TIME * 1.1" | bc) -eq 1 ]
          then
            echo "HEAD run time is at least 10% slower than PREVIOUS run time"
            exit 1
          fi