Sync cmakebuild with main #3736

	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}" == "${lastsha}" ];then
	echo "No new commits on the main branch to merge, exiting"
	exit 0
	fi
	git clone -b main --shallow-exclude cmakebuild https://$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=$(git rev-parse HEAD)
	git merge main --no-edit
	currsha=$(git rev-parse HEAD)
	if [ ${prevsha} == ${currsha} ];then
	echo "Merge did not bring any changes, exiting"
	exit
	fi
	./generate_cmake -k
	echo ${mainsha} > ydb/ci/cmakegen.txt
	git add .
	git commit -m "Generate cmake for ${mainsha}"
	git push --set-upstream origin cmakebuild

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