specify msrv

.github/workflows/ci.yml

@@ -36,6 +36,19 @@ jobs:
           authToken: '${{ secrets.ATTIC_TOKEN }}'
       - run: nix build .#clippy
 
+  msrv:
+    runs-on: ubuntu-latest
+    needs: check
+    steps:
+      - uses: actions/checkout@v4
+      - uses: cachix/install-nix-action@v25
+      - uses: icewind1991/attic-action@v1
+        with:
+          name: ci
+          instance: https://cache.icewind.me
+          authToken: '${{ secrets.ATTIC_TOKEN }}'
+      - run: nix build .#msrv
+
   matrix:
     runs-on: ubuntu-latest
     outputs:

Cargo.toml

@@ -8,6 +8,7 @@ license = "MIT OR Apache-2.0"
 repository = "https://github.com/demostf/parser"
 exclude = [ "tests/fuzz", "test_data" ]
 default-run = "parse_demo"
+rust-version = "1.70.0"
 
 [lib]
 name = "tf_demo_parser"

flake.nix

@@ -30,6 +30,7 @@
         inherit system overlays;
       };
       lib = pkgs.lib;
+      inherit (builtins) listToAttrs fromTOML readFile;
 
       hostTarget = pkgs.hostPlatform.config;
       targets = [
@@ -62,6 +63,16 @@
       };
       hostNaersk = cross-naersk'.hostNaersk;
 
+      msrv = (fromTOML (readFile ./Cargo.toml)).package.rust-version;
+      msrvToolchain = pkgs.rust-bin.stable."${msrv}".default;
+      naerskMsrv = let
+        toolchain = msrvToolchain;
+      in
+        pkgs.callPackage naersk {
+          cargo = toolchain;
+          rustc = toolchain;
+        };
+
       mkHydraJobs = system: {
         parser = derivation {
           name = "parser";
@@ -104,6 +115,10 @@
               release = false;
               mode = "test";
             });
+          msrv = naerskMsrv.buildPackage (nearskOpt
+            // {
+              mode = "check";
+            });
           default = demostf-parser;
         };