Lint

Add github action to get package delta #6

	name: Lint
	on:
	push:
	branches:
	- main
	pull_request:

	jobs:
	pre-commit:
	name: Pre-commit checks
	runs-on: ubuntu-latest
	steps:
	- name: Checkout the Repo
	uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
	with:
	fetch-depth: 0 # needed for pre-commit to work correctly
	- name: Load Nix
	uses: ./.github/actions/load-nix
	- name: Validate Pre-Commit Config
	shell: bash
	run: nix develop -c sh -c "pre-commit validate-config"
	- name: Run pre-commit checks
	env:
	BASE_REF: ${{ github.base_ref }}
	HEAD_REF: ${{ github.head_ref }}
	run: \|
	nix develop -c sh -c "\
	git fetch origin ${BASE_REF}:${BASE_REF} &&\
	git fetch origin ${HEAD_REF}:${HEAD_REF} &&\
	gitdiffs=\$(git diff --name-only ${BASE_REF}...${HEAD_REF} \| xargs) &&\
	echo \"changed files: \$gitdiffs\" &&\
	pre-commit run --hook-stage pre-push --show-diff-on-failure --color=always --files \${gitdiffs}"

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