check msrv

.github/workflows/ci.yml

@@ -49,3 +49,16 @@ jobs:
       - uses: actions/checkout@v3
       - name: Check semver
         uses: obi1kenobi/cargo-semver-checks-action@v2
+
+  msrv:
+    runs-on: ubuntu-latest
+    needs: check
+    steps:
+      - uses: actions/checkout@v3
+      - uses: cachix/install-nix-action@v20
+      - uses: icewind1991/attic-action@v1
+        with:
+          name: ci
+          instance: https://cache.icewind.me
+          authToken: '${{ secrets.ATTIC_TOKEN }}'
+      - run: nix build .#msrv

Cargo.lock

@@ -320,7 +320,7 @@ checksum = "6ceab39d59e4c9499d4e5a8ee0e2735b891bb7308ac83dfb4e80cad195c9f6f3"
 
 [[package]]
 name = "vbsp"
-version = "0.1.0"
+version = "0.2.0"
 dependencies = [
  "arrayvec",
  "binrw",

Cargo.toml

@@ -9,6 +9,7 @@ license = "MIT"
 edition = "2021"
 readme = "README.md"
 exclude = ["*.bsp"]
+rust-version = "1.62.0"
 
 [dependencies]
 arrayvec = "0.7.2"

flake.nix

@@ -21,29 +21,66 @@
       pkgs = (import nixpkgs) {
         inherit system overlays;
       };
-      lib = pkgs.lib;
-      naersk' = pkgs.callPackage naersk {};
-      src = lib.sources.sourceByRegex (lib.cleanSource ./.) ["Cargo.*" "(src|derive|benches|tests|examples|koth_bagel.*)(/.*)?"];
+      inherit (pkgs) lib callPackage rust-bin mkShell;
+      inherit (lib.sources) sourceByRegex;
+
+      msrv = (fromTOML (readFile ./Cargo.toml)).package.rust-version;
+      inherit (builtins) fromTOML readFile;
+      toolchain = rust-bin.stable.latest.default;
+      msrvToolchain = rust-bin.stable."${msrv}".default;
+
+      naersk' = callPackage naersk {
+        rustc = toolchain;
+        cargo = toolchain;
+      };
+      msrvNaersk = callPackage naersk {
+        rustc = msrvToolchain;
+        cargo = msrvToolchain;
+      };
+
+      src = sourceByRegex ./. ["Cargo.*" "(src|derive|benches|tests|examples|koth_bagel.*)(/.*)?"];
       nearskOpt = {
         pname = "vbsp";
         root = src;
       };
     in rec {
       packages = {
-        check = naersk'.buildPackage (nearskOpt // {
+        check = naersk'.buildPackage (nearskOpt
+          // {
             mode = "check";
           });
-        clippy = naersk'.buildPackage (nearskOpt // {
+        clippy = naersk'.buildPackage (nearskOpt
+          // {
             mode = "clippy";
           });
-        test = naersk'.buildPackage (nearskOpt // {
+        test = naersk'.buildPackage (nearskOpt
+          // {
             release = false;
             mode = "test";
           });
+        msrv = msrvNaersk.buildPackage (nearskOpt
+          // {
+            mode = "check";
+          });
       };
 
-      devShells.default = pkgs.mkShell {
-        nativeBuildInputs = with pkgs; [rustc cargo bacon cargo-edit cargo-outdated clippy cargo-audit cargo-msrv cargo-fuzz cargo-semver-checks];
+      devShells = let
+        tools = with pkgs; [
+          bacon
+          cargo-edit
+          cargo-outdated
+          cargo-audit
+          cargo-msrv
+          cargo-fuzz
+          cargo-semver-checks
+        ];
+      in {
+        default = mkShell {
+          nativeBuildInputs = [toolchain] ++ tools;
+        };
+        msrv = mkShell {
+          nativeBuildInputs = [msrvToolchain] ++ tools;
+        };
       };
     });
 }