treewide: revamp build system

Author: lovesegfault

.envrc

@@ -1,8 +1,3 @@
 use flake
 
-watch_file ./nix/deploy.nix
-watch_file ./nix/gen-ci.nix
-watch_file ./nix/outputs.nix
-watch_file ./nix/shell.nix
-
 eval "$shellHook"

.github/dependabot.yaml

@@ -0,0 +1,16 @@
+version: 2
+updates:
+- package-ecosystem: github-actions
+  directory: "/"
+  schedule:
+    interval: monthly
+  commit-message:
+      prefix: "chore"
+      include: "scope"
+- package-ecosystem: cargo
+  directory: "/"
+  schedule:
+    interval: weekly
+  commit-message:
+      prefix: "chore"
+      include: "scope"

.github/workflows/build.yml

@@ -0,0 +1,59 @@
+name: ci
+on:
+  push:
+    branches:
+      - main
+      - flake-update
+  pull_request:
+jobs:
+  nix-build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        system:
+          - x86_64-linux
+          # - aarch64-linux
+    steps:
+      - uses: actions/[email protected]
+        with:
+          fetch-depth: 0
+      - uses: cachix/install-nix-action@v13
+        with:
+          install_url: https://nixos-nix-install-tests.cachix.org/serve/ipa0c64h689jb4ys6hxsky2r8xpld0hv/install
+          install_options: '--tarball-url-prefix https://nixos-nix-install-tests.cachix.org/serve'
+          extra_nix_config: experimental-features = nix-command flakes
+      - uses: cachix/cachix-action@v10
+        with:
+          name: nix-community
+      - name: nix-build
+        run: nix build -L .#defaultPackage.${{ matrix.system }}
+  nix-check:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/[email protected]
+        with:
+          fetch-depth: 0
+      - uses: cachix/install-nix-action@v13
+        with:
+          install_url: https://nixos-nix-install-tests.cachix.org/serve/ipa0c64h689jb4ys6hxsky2r8xpld0hv/install
+          install_options: '--tarball-url-prefix https://nixos-nix-install-tests.cachix.org/serve'
+          extra_nix_config: experimental-features = nix-command flakes
+      - uses: cachix/cachix-action@v10
+        with:
+          name: nix-community
+      - name: nix-check
+        run: nix flake check -L
+  clippy:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/[email protected]
+      - uses: actions-rs/toolchain@v1
+        with:
+            toolchain: nightly
+            components: clippy
+            target: aarch64-unknown-linux-gnu
+            override: true
+      - uses: actions-rs/clippy-check@v1
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          args: --all-features

.github/workflows/ci.yaml

@@ -2,3 +2,4 @@
 result
 result*
 .direnv/
+.pre-commit-config.yaml

.github/workflows/clippy.yml

@@ -3,47 +3,96 @@
     fenix = {
       url = "github:figsoda/fenix";
       inputs.nixpkgs.follows = "nixpkgs";
+      inputs.naersk.follows = "naersk";
     };
     flake-utils.url = "github:numtide/flake-utils";
     naersk = {
       url = "github:nmattia/naersk";
       inputs.nixpkgs.follows = "nixpkgs";
     };
     nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+    pre-commit-hooks = {
+      url = "github:cachix/pre-commit-hooks.nix";
+      inputs.nixpkgs.follows = "nixpkgs";
+      inputs.flake-utils.follows = "flake-utils";
+    };
   };
 
-  outputs = { self, fenix, flake-utils, naersk, nixpkgs }:
+  outputs = { self, fenix, flake-utils, naersk, nixpkgs, pre-commit-hooks }:
     flake-utils.lib.eachDefaultSystem (system:
       let
         pkgs = nixpkgs.legacyPackages.${system};
+
+        fenixPkgs = fenix.packages.${system};
         target = "aarch64-unknown-linux-gnu";
-        toolchain = with fenix.packages.${system}; combine [
-          minimal.rustc
-          minimal.cargo
-          targets.${target}.latest.rust-std
+        rustFull = with fenixPkgs; combine [
+          (stable.withComponents [
+            "cargo"
+            "clippy-preview"
+            "rust-src"
+            "rust-std"
+            "rustc"
+            "rustfmt-preview"
+          ])
+          targets.${target}.stable.rust-std
         ];
-        naerskCross = naersk.lib.${system}.override {
-          cargo = toolchain;
-          rustc = toolchain;
-        };
+        rustMinimal = with fenixPkgs; combine [
+          (minimal.withComponents [
+            "cargo"
+            "rust-std"
+            "rustc"
+          ])
+          targets.${target}.minimal.rust-std
+        ];
+
+        naerskBuild = (naersk.lib.${system}.override {
+          cargo = rustMinimal;
+          rustc = rustMinimal;
+        }).buildPackage;
+
         cargoConfig = {
           CARGO_BUILD_TARGET = target;
-          CARGO_TARGET_AARCH64_UNKNOWN_LINUX_GNU_LINKER = "${pkgs.pkgsCross.aarch64-multiplatform.stdenv.cc}/bin/${target}-gcc";
+          CARGO_TARGET_AARCH64_UNKNOWN_LINUX_GNU_LINKER =
+            if "${system}" == "aarch64-linux" then
+              "${pkgs.stdenv.cc}/bin/gcc"
+            else
+              "${pkgs.pkgsCross.aarch64-multiplatform.stdenv.cc}/bin/${target}-gcc";
         };
       in
       {
-        defaultPackage = naerskCross.buildPackage ({
+        packages.hyperpixel-init = naerskBuild ({
           src = ./.;
+          doDoc = true;
         } // cargoConfig);
 
+        defaultPackage = self.packages.${system}.hyperpixel-init;
+
         devShell = pkgs.mkShell ({
+          inherit (self.checks.${system}.pre-commit-check) shellHook;
           name = "hyperpixel-init";
-
           buildInputs = with pkgs; [
             cargo-edit
+            fenixPkgs.rust-analyzer
+            nix-linter
             nixpkgs-fmt
-            toolchain
-          ] ++ (with fenix.packages.${system}; [ rust-analyzer ]);
+            rustFull
+          ];
         } // cargoConfig);
+
+        checks = {
+          pre-commit-check = (pre-commit-hooks.lib.${system}.run {
+            src = ./.;
+            hooks = {
+              nixpkgs-fmt.enable = true;
+              nix-linter.enable = true;
+              rustfmt = {
+                enable = true;
+                entry = pkgs.lib.mkForce ''
+                  bash -c 'PATH="$PATH:${rustFull}/bin" cargo fmt -- --check --color always'
+                '';
+              };
+            };
+          });
+        };
       });
 }