auto_update_benchmark_branches.yml

name: Auto update benchmark branches

on:
  release:
    types: [published]

jobs:
  update_benchmark_branches:
    # only run on "normal" 2.0 branches
    if: |
      startsWith(github.event.release.tag_name, 'v2.')
      && !endsWith(github.event.release.tag_name, '-prerelease')
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v2
        with:
          fetch-depth: 0

      - uses: actions/setup-dotnet@v1
        with:
          dotnet-version: '8.0.100'

      - name: "Output current version"
        id: versions
        run: ./tracer/build.sh OutputCurrentVersionToGitHub

      - name: "Configure Git Credentials"
        run: |
          git config user.name "${{ github.actor }}"
          git config user.email "${{ github.actor }}@users.noreply.github.com"

      - name: "Clean up old benchmark branches"
        run: |
          # find all remote benchmarks/* branches (by literal string)
          # Exclude the branches we want to permenantly keep using -e for each value
          # trim "remotes/origin" from start
          # Reverse the order
          # Skip the 1st result (so we will have 2 benchmarks at most)
          # Then do the complex dance to rename all the branches
          echo 'Looking for benchmark branches...'
          BRANCHES=$(git branch -a  \
            | grep -F 'origin/benchmarks' \
            | cut -c 18- \
            | tac | tail -n +2)

          echo "Found branches:"
          echo "$BRANCHES"

          for orig in $BRANCHES; do
           archived=archived_$orig;
           echo "Renaming $orig to $archived"
           git branch $archived origin/$orig
           git push origin -u $archived
           git push origin --delete $orig;
           git branch -d $archived;
          done

      - name: "Push new benchmarks branch"
        run: |
          new_branch=benchmarks/${{steps.versions.outputs.full_version}}
          git checkout -b $new_branch ${{ github.event.release.tag_name }}
          git push origin -u $new_branch