update-submodules.yml

name: Check for submodule releases

on:
  push:
    branches:
      - main
  pull_request:
    branches:
      - main

jobs:
  check-submodule-releases:
    runs-on: ubuntu-latest

    steps:
    - name: Checkout code
      uses: actions/checkout@v4
      with:
        submodules: 'recursive'

    - name: Check for new submodule release of go-ethereum
      run: |
        # Fetch the latest release tag from the submodule repo using the GitHub API
        LATEST_GETH_RELEASE=$(curl -s https://api.github.com/repos/ethereum/go-ethereum/releases/latest | jq -r .tag_name)
        cd ./dependencies/go-ethereum
        # Fetch and check the current checked-out tag for the submodule
        git fetch
        CURRENT_TAG=$(git describe --tags `git rev-list --tags --max-count=1`)
        if [[ "$LATEST_GETH_RELEASE" != "$CURRENT_TAG" ]]; then
          echo "There's a new release for the submodule: $LATEST_GETH_RELEASE (current is $CURRENT_TAG)"
          echo "LATEST_GETH_RELEASE=$LATEST_GETH_RELEASE" >> $GITHUB_ENV
          echo "NEW_GETH_UPDATE=true" >> $GITHUB_ENV
        fi

    - name: Update Geth submodule to new release
      if: env.NEW_GETH_UPDATE == 'true'
      run: |
        cd ./dependencies/go-ethereum
        git checkout ${{ env.LATEST_GETH_RELEASE }}

    - name: Create PR for Geth submodule update
      if: env.NEW_GETH_UPDATE == 'true'
      uses: peter-evans/create-pull-request@v3
      with:
        title: Update Geth submodule to ${{ env.LATEST_GETH_RELEASE }}
        commit-message: Update Geth submodule to ${{ env.LATEST_GETH_RELEASE }}
        branch: update-submodule-to-${{ env.LATEST_GETH_RELEASE }}

    - name: Check for new submodule release of prysm
      run: |
        # Fetch the latest release tag from the submodule repo using the GitHub API
        LATEST_PRYSM_RELEASE=$(curl -s https://api.github.com/repos/ethereum/go-ethereum/releases/latest | jq -r .tag_name)
        cd ./dependencies/prysm
        # Fetch and check the current checked-out tag for the submodule
        git fetch
        CURRENT_TAG=$(git describe --tags `git rev-list --tags --max-count=1`)
        if [[ "$LATEST_PRYSM_RELEASE" != "$CURRENT_TAG" ]]; then
          echo "There's a new release for the submodule: $LATEST_PRYSM_RELEASE (current is $CURRENT_TAG)"
          echo "LATEST_PRYSM_RELEASE=$LATEST_PRYSM_RELEASE" >> $GITHUB_ENV
          echo "NEW_PRYSM_UPDATE=true" >> $GITHUB_ENV
        fi

    - name: Update Prysm submodule to new release
      if: env.NEW_PRYSM_UPDATE == 'true'
      run: |
        cd ./dependencies/prysm
        git checkout ${{ env.LATEST_PRYSM_RELEASE }}

    - name: Create PR for Prysm submodule update
      if: env.NEW_PRYSM_UPDATE == 'true'
      uses: peter-evans/create-pull-request@v3
      with:
        title: Update Prysm submodule to ${{ env.LATEST_PRYSM_RELEASE }}
        commit-message: Update Prysm submodule to ${{ env.LATEST_PRYSM_RELEASE }}
        branch: update-submodule-to-${{ env.LATEST_PRYSM_RELEASE }}