Run CI on a matrix of OSes and platforms

Author: w4

Diff for: .github/workflows/ci.yml

@@ -3,67 +3,32 @@ on: [push, pull_request]
 name: CI
 
 jobs:
-  check:
-    name: Check
+  nix-matrix:
     runs-on: ubuntu-latest
+    outputs:
+      matrix: ${{ steps.set-matrix.outputs.matrix }}
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions-rs/toolchain@v1
-        with:
-          profile: minimal
-          toolchain: stable
-          override: true
-      - uses: actions-rs/cargo@v1
-        with:
-          command: check
-
-  # TODO: the build for this started failing in 1b34a74891423e118c567368c95b7e04f3b9ca63
-  #test:
-  #  name: Test Suite
-  #  runs-on: ubuntu-latest
-  #  steps:
-  #    - uses: actions/checkout@v2
-  #    - uses: actions-rs/toolchain@v1
-  #      with:
-  #        profile: minimal
-  #        toolchain: stable
-  #        override: true
-  #    - uses: actions-rs/cargo@v1
-  #      with:
-  #        command: test
+      - uses: actions/checkout@v4
+      - uses: cachix/install-nix-action@v30
+      - id: set-matrix
+        name: Generate Nix Matrix
+        run: |
+          set -Eeu
+          matrix="$(nix eval --json '.#githubActions.matrix')"
+          echo "matrix=$matrix" >> "$GITHUB_OUTPUT"
 
-  fmt:
-    name: Rustfmt
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v3
-      - uses: actions-rs/toolchain@v1
-        with:
-          profile: minimal
-          toolchain: stable
-          override: true
-      - run: rustup component add rustfmt
-      - uses: actions-rs/cargo@v1
-        with:
-          command: fmt
-
-  cargo-deny:
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v3
-    - uses: EmbarkStudios/cargo-deny-action@v1
-
-  clippy:
-    name: Clippy
-    runs-on: ubuntu-latest
+  check:
+    name: ${{ matrix.name }} (${{ matrix.system }})
+    needs: nix-matrix
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix: ${{fromJSON(needs.nix-matrix.outputs.matrix)}}
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions-rs/toolchain@v1
-        with:
-          profile: minimal
-          toolchain: stable
-          override: true
-      - run: rustup component add clippy
-      - uses: actions-rs/cargo@v1
+      - uses: actions/checkout@v4
+      - uses: cachix/install-nix-action@v30
+      - name: Authenticate with Cachix
+        uses: cachix/cachix-action@v15
         with:
-          command: clippy
+          name: rgit
+          authToken: ${{ secrets.CACHIX_AUTH_TOKEN }}
+      - run: nix build -L '.#${{ matrix.attr }}'

Diff for: flake.lock

@@ -15,9 +15,20 @@
       url = "github:JordanForks/helix";
       flake = false;
     };
+
+    nix-github-actions = {
+      url = "github:nix-community/nix-github-actions";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
   };
 
-  outputs = { self, nixpkgs, utils, crane, advisory-db, treefmt-nix, helix }:
+  outputs = { self, nixpkgs, utils, crane, advisory-db, treefmt-nix, helix, nix-github-actions }:
+    {
+      githubActions = nix-github-actions.lib.mkGithubMatrix {
+        checks = { inherit (self.checks) x86_64-linux x86_64-darwin aarch64-darwin; };
+      };
+    }
+    //
     utils.lib.eachDefaultSystem (system:
       let
         pkgs = import nixpkgs { inherit system; };
@@ -57,11 +68,11 @@
       in
       {
         checks = {
-          inherit rgit;
-          rgit-clippy = craneLib.cargoClippy buildArgs;
-          rgit-doc = craneLib.cargoDoc buildArgs;
-          rgit-audit = craneLib.cargoAudit { inherit advisory-db; src = cargoOnlySrc; };
-          rgit-test = craneLib.cargoNextest (buildArgs // {
+          build = rgit;
+          clippy = craneLib.cargoClippy buildArgs;
+          doc = craneLib.cargoDoc buildArgs;
+          audit = craneLib.cargoAudit { inherit advisory-db; src = cargoOnlySrc; };
+          test = craneLib.cargoNextest (buildArgs // {
             partitions = 1;
             partitionType = "count";
           });