enforce-evm-migration.yaml

name: Ensure EVM module migration when bytecode changes

on:
  - pull_request

jobs:
  ensure-evm-migration:
    strategy:
      matrix:
        go-version:
          - 1.19
        os:
          - ubuntu-20.04
    runs-on: ${{ matrix.os }}
    steps:
      - name: Checkout code
        uses: actions/checkout@v3
        with:
          fetch-depth: '0'
          ref: ${{ inputs.branch }}
          submodules: recursive

      - name: Compare bytecode version to previous tagged version
        run: |
          tag=$(git tag --list --merged HEAD --sort=-v:refname | head -n 1)
          current_commit=$(git rev-parse HEAD)
          evm_module=./x/evm/module.go
          echo "Comparing current branch with tag $tag"
          
          if git diff -s --exit-code "$tag"  -- ./contract-artifacts; then
          echo "The contract version has not changed, no need to enforce a migration"
          exit 0
          fi
          
          echo "The contract version has changed"
          # Check out the latest tag, increment the consensus version and check if it matches the version in the current commit
          git checkout -q "$tag"  $evm_module
          perl -i -pe 's/(?<=^func \(AppModule\) ConsensusVersion\(\) uint64 \{ return )(\b\d+\b)(?= }$)/$1+1/me' $evm_module
          if git diff "$current_commit" --exit-code $evm_module | grep ConsensusVersion > /dev/null; then
          echo "EVM module consensus version needs to be incremented"
          exit 1
          fi
          
          echo "EVM module consensus version has been incremented"