sync.yml

on:
  schedule:
    # 1:05 past midnight UTC
    - cron: "5 1 * * *"

env:
  DEFAULT_BRANCH: "master"

name: "Sync with upstream"
jobs:
  sync-check:
    name: "Sync Necessity Check"
    runs-on: "ubuntu-latest"
    outputs:
      should_sync: ${{ steps.out.outputs.should_sync }}

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

      - id: "out"
        name: "Check if sync is needed"
        run: |
          git fetch origin
          git remote add upstream https://github.com/graphprotocol/graph-node
          git fetch upstream --no-tags

          MERGE_BASE=$(git merge-base origin/$DEFAULT_BRANCH upstream/$DEFAULT_BRANCH)

          # Don't force push unnecessarily unless changes are detected
          if [[ $(git rev-list $MERGE_BASE..upstream/$DEFAULT_BRANCH | wc -l) -ne 0 ]]; then 
            echo "should_sync=true" >> $GITHUB_OUTPUT
          else
            echo "No changes detected on upstream $DEFAULT_BRANCH"
            echo "should_sync=false" >> $GITHUB_OUTPUT
          fi

  sync:
    name: "Sync"
    runs-on: "ubuntu-latest"
    needs: "sync-check"
    if: "needs.sync-check.outputs.should_sync == 'true'"

    steps:
      # https://github.com/actions/runner-images/issues/2840#issuecomment-790492173
      - name: "Free up disk space"
        run: |
          sudo rm -rf /usr/share/dotnet
          sudo rm -rf /opt/ghc
          sudo rm -rf "/usr/local/share/boost"
          sudo rm -rf "$AGENT_TOOLSDIRECTORY"

      - name: "Checkout source code"
        uses: "actions/checkout@v3"
        with:
          # Subsequent actions are not triggered unless using PAT
          token: "${{ secrets.GH_PAT }}"
          fetch-depth: 0
          submodules: true

      - name: "Setup toolchain"
        uses: "actions-rs/toolchain@v1"
        with:
          toolchain: "stable"
          profile: "minimal"
          override: false

      - uses: "Swatinem/rust-cache@v1"
        with:
          cache-on-failure: true

      - name: "Install libpq-dev"
        run: |
          sudo apt-get install -y libpq-dev

      - name: "Install protoc"
        run: |
          # The version from apt-get is too old and won't work
          curl -L -o /tmp/protoc.zip "https://github.com/protocolbuffers/protobuf/releases/download/v21.12/protoc-21.12-linux-x86_64.zip"
          mkdir ${HOME}/protoc
          cd ${HOME}/protoc
          unzip /tmp/protoc.zip && rm /tmp/protoc.zip
          echo "${HOME}/protoc/bin" >> $GITHUB_PATH

      - name: "Config Git"
        run: |
          git config user.name "Jonathan LEI"
          git config user.email "me@xjonathan.dev"

      - name: "Update branch"
        run: |
          git fetch origin
          git remote add upstream https://github.com/graphprotocol/graph-node
          git fetch upstream --no-tags

          MERGE_BASE=$(git merge-base origin/$DEFAULT_BRANCH upstream/$DEFAULT_BRANCH)

          # Brings files from `home` to default branch
          git checkout $DEFAULT_BRANCH
          git reset --hard upstream/$DEFAULT_BRANCH
          git checkout origin/home .

          git add .
          git commit -m "chore: README and CI changes"

          # Here, we pick commits on the default branch except the first one. We do this instead
          # of a naive rebase because the `home` branch might have changed, causing merge
          # conflicts.
          COMMIT_COUNT=$(git rev-list $MERGE_BASE..origin/$DEFAULT_BRANCH | wc -l)
          if [ "$COMMIT_COUNT" -ne "1" ]; then
            git cherry-pick origin/$DEFAULT_BRANCH~$(($COMMIT_COUNT-1))..origin/$DEFAULT_BRANCH
          fi

      - name: "Check code format"
        run: |
          cargo fmt --all --check

      - name: "Build"
        run: |
          cargo build --all --all-targets

      - name: "Push updated branch"
        run: |
          git push --force-with-lease

      - name: "Move nightly tag"
        run: |
          git tag -f nightly
          git push --delete origin nightly
          git push origin nightly