Mid-fall Nix and CI cleaning #1

	name: CI

	on:
	push:
	branches: [main]
	pull_request:
	workflow_dispatch:

	# TODO: use latest compiler. `time` fails to compile on 1.80.0 currently
	env:
	RUST_TOOLCHAIN: 1.79.0

	jobs:
	build:
	name: Build

	strategy:
	fail-fast: false
	matrix:
	os:
	- ubuntu-latest
	- macos-latest
	- windows-latest

	runs-on: ${{ matrix.os }}

	steps:
	- name: Checkout repository
	uses: actions/checkout@v4

	- name: Install Rust
	uses: dtolnay/rust-toolchain@master
	with:
	toolchain: ${{ env.RUST_VERSION }}

	- name: Setup Rust cache
	uses: Swatinem/rust-cache@v2

	- name: Build
	run: cargo build --locked --target

	format:
	name: Format

	runs-on: ubuntu-latest

	steps:
	- name: Checkout repository
	uses: actions/checkout@v4

	- name: Install Rust
	uses: dtolnay/rust-toolchain@master
	with:
	# TODO: use latest compiler. `time` fails to compile on 1.80.0 currently
	toolchain: ${{ env.RUST_TOOLCHAIN }}
	components: rustfmt

	- name: Setup Rust cache
	uses: Swatinem/rust-cache@v2

	- name: Check formatting
	run: cargo fmt -- --check

	nix:
	name: Check Nix Flake

	runs-on: ubuntu-latest

	steps:
	- name: Checkout repository
	uses: actions/checkout@v4

	- name: Install Nix
	uses: DeterminateSystems/nix-installer-action@v13

	- name: Run checks
	run: \|
	nix flake check \
	--all-systems \
	--print-build-logs \
	--show-trace

	# Make sure all above jobs finished successfully
	release-gate:
	name: CI Release gate
	needs: [build, format, nix]

	if: ${{ always() }}

	runs-on: ubuntu-latest

	steps:
	- name: Exit with error
	if: contains(needs..result, 'failure') \|\| contains(needs..result, 'cancelled')
	run: exit 1

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