Constrain early returns in functions in addition to closures #2792

	on:
	pull_request:

	name: devtools nix files test - linux

	concurrency:
	group: ${{ github.workflow }}-${{ github.ref }}
	cancel-in-progress: true

	jobs:
	devtools-test-linux:
	name: devtools-test-linux
	runs-on: [ubuntu-20.04]
	timeout-minutes: 120
	steps:
	- uses: actions/checkout@v4

	- name: Only run all steps if a nix file changed
	run: \|
	git fetch origin ${{ github.base_ref }}
	if git diff --name-only origin/${{ github.base_ref }} HEAD \| grep 'nix'; then
	echo "A nix file was changed. Testing devtools nix files..."
	echo "nix_changed=true" >> $GITHUB_ENV
	else
	echo "A nix file was changed. No need to run tests."
	echo "nix_changed=false" >> $GITHUB_ENV
	fi


	- uses: cachix/install-nix-action@v23
	if: env.nix_changed == 'true'
	with:
	nix_path: nixpkgs=channel:nixos-unstable

	- name: test devtools/flake.nix
	if: env.nix_changed == 'true'
	id: devtools_test_step
	run: \|
	sed -i "s\|/home/username/gitrepos/roc\|$(realpath .)\|g" devtools/flake.nix
	cat devtools/flake.nix
	mkdir -p ../temp
	cp devtools/flake.nix ../temp
	cp devtools/flake.lock ../temp
	cd ../temp
	git init
	git add flake.nix flake.lock
	nix develop

	- name: Print tip on fail
	if: steps.devtools_test_step.outcome == 'failure'
	run: \|
	echo "The devtools test failed, this can likely be fixed by"
	echo "locally deleting devtools/flake.lock and following the"
	echo "instructions in devtools/README.md. This will create a"
	echo "new flake.lock you should use to replace the old devtools/flake.lock"

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