Add semver check (#156)

* Add semver check

Fix format

Speeling

Speeling

* Further contributing note

* Speeling

* Fix hostPlatform -> stdenv issue

* Bump dependencies

---------

Co-authored-by: Cole Helbling <cole.helbling@determinate.systems>

CONTRIBUTING.md

@@ -359,6 +359,9 @@ You can also remove your `$HOME/nix-installer-wsl-tests-temp` folder whenever yo
 
 # Releases
 
+
+This package uses [Semantic Versioning](https://semver.org/). When determining the version number for a new release refer to Semantic Versioning for guidance. You can use the `check-semver` command alias from within the development environment to validate your changes don't break semver.
+
 To cut a release:
 
 * Ensure the `flake.lock`, `Cargo.lock`, and Rust dependencies are up-to-date with the following:

flake.nix

@@ -139,6 +139,7 @@
               check.check-spelling
               check.check-nixpkgs-fmt
               check.check-editorconfig
+              check.check-semver
             ]
             ++ lib.optionals (pkgs.stdenv.isDarwin) (with pkgs; [ libiconv ]);
           };

nix/check.nix

@@ -41,4 +41,13 @@ in
       eclint .
     '';
   });
+
+  # Semver
+  check-semver = (writeShellApplication {
+    name = "check-semver";
+    runtimeInputs = with pkgs; [ cargo-semver-checks ];
+    text = ''
+      cargo-semver-checks semver-checks check-release
+    '';
+  });
 }