ydb/.github/workflows/sync_cmakebuild.yml

name: Sync cmakebuild with main
on:
  schedule:
    - cron: "0 * * * *"  # At minute 0 every hour
  workflow_dispatch:
concurrency:
  group: ${{ github.workflow }}
  cancel-in-progress: true
env:
  REPO: ${{ github.repository }}
  TOKEN: ${{ secrets.GH_PERSONAL_ACCESS_TOKEN }}
jobs:
  sync:
    runs-on: ubuntu-latest
    steps:
    - name: Sync
      run: |
        mainsha=$(curl -s -H "Accept: application/vnd.github.VERSION.sha" https://api.github.com/repos/$REPO/commits/main)
        echo "Main sha: ${mainsha}"
        lastsha=$(curl -s https://raw.githubusercontent.com/$REPO/cmakebuild/ydb/ci/cmakegen.txt)
        echo "Last sha: ${lastsha}"
        if [ "${mainsha}" == "${lastsha}" ];then
          echo "No new commits on the main branch to merge, exiting"
          exit 0
        fi
        git clone -b main https://$TOKEN@github.com/$REPO.git ydb
        git config --global user.email "alex@ydb.tech"
        git config --global user.name "Alexander Smirnov"
        cd ydb
        git fetch --depth `expr $(git rev-list --count HEAD) + 1`
        # Depth 10: 1st with cmake generation, 2nd with previous merge, 3rd is common between main and cmakebuild,
        # others for possible commits directly on cmakebuild branch
        git fetch origin cmakebuild:cmakebuild --depth 10 
        mainsha=$(git rev-parse HEAD)
        git checkout cmakebuild
        prevsha=$(git rev-parse HEAD)
        
        conflicts_file=$(mktemp)
        for i in $(seq 1 10);do
          (git merge main --no-commit --no-ff main > $conflicts_file) | true
          git reset HEAD --hard > /dev/null
          git clean -fd > /dev/null
          if [ -s $conflicts_file ];then
            echo "Conflicts detected, trying to remove referenced CMakeLists* files"
            grep -E -o '\s\S*CMakeLists\S*\s' $conflicts_file | xargs rm -f
            git add .
            git commit -m "Remove conflicted CMakeLists"
          else
            break
          fi
        done
        
        git merge main --no-edit
        currsha=$(git rev-parse HEAD)
        if [ ${prevsha} == ${currsha} ];then
          echo "Merge did not bring any changes, exiting"
          exit
        fi
        # Generate cmakelists
        ./generate_cmake -k
        echo ${mainsha} > ydb/ci/cmakegen.txt
        git add .
        git commit -m "Generate cmake for ${mainsha}"
        git push --set-upstream origin cmakebuild