ci: keep one core free when running flake check #14

	name: "Build and publish to Cachix and FlakeHub ❄️"
	on:
	push:
	branches:
	- master
	jobs:
	build:
	runs-on: ubuntu-latest
	permissions:
	id-token: write
	contents: read
	steps:
	- name: Delete unnecessary tools folder
	run: rm -rf /opt/hostedtoolcache
	- name: Checkout repository
	uses: actions/checkout@v4
	- name: Install nix
	uses: cachix/install-nix-action@v30
	- name: Setup cachix
	uses: cachix/cachix-action@v14
	with:
	authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
	name: polkadot
	- name: Nix flake check
	run: \|
	CORES=$(nproc)
	CORES=$((CORES - 1))
	echo "Using $CORES cores."
	nix flake check --max-jobs 1 --option cores $CORES
	- name: Nix flake develop
	run: nix develop
	- name: Publish to FlakeHub
	uses: DeterminateSystems/flakehub-push@main
	with:
	name: "andresilva/polkadot.nix"
	rolling: true
	visibility: public

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