feat(templates): add a template for rust

To use it, run:
```
nix flake init -t github:fcuny/world#rust
```

1 files changed, 66 insertions, 0 deletions

diff --git a/templates/rust/flake.nix b/templates/rust/flake.nix
new file mode 100644
index 0000000..49c2f76
--- /dev/null
+++ b/templates/rust/flake.nix
@@ -0,0 +1,66 @@
+{
+  description = "A CLI to manage public SSH keys for GitHub.";
+
+  inputs = {
+    flake-utils.url = "github:numtide/flake-utils";
+    nixpkgs.url = "github:NixOS/nixpkgs";
+    rust-overlay.url = "github:oxalica/rust-overlay";
+    naersk.url = "github:nmattia/naersk";
+  };
+
+  outputs =
+    { self
+    , flake-utils
+    , nixpkgs
+    , naersk
+    , rust-overlay
+    }:
+
+    flake-utils.lib.eachDefaultSystem
+      (system:
+      let
+        overlays = [ (import rust-overlay) ];
+        pkgs = import nixpkgs { inherit system overlays; };
+        rust-toolchain =
+          (pkgs.rust-bin.fromRustupToolchainFile ./rust-toolchain.toml).override {
+            extensions = [ "rust-src" ];
+          };
+        naersk-lib = naersk.lib."${system}".override {
+          rustc = rust-toolchain;
+        };
+      in
+      rec
+      {
+        packages.gh-ssh-keys = naersk-lib.buildPackage {
+          pname = "gh-ssh-keys";
+          root = ./.;
+          buildInputs = with pkgs; [
+            pkg-config
+            openssl
+          ];
+        };
+
+        defaultPackage = packages.gh-ssh-keys;
+
+        devShell = pkgs.mkShell {
+          nativeBuildInputs = with pkgs; [
+            rust-toolchain
+            openssl
+            pkg-config
+            cargo-audit
+            cargo-deny
+            cargo-cross
+            rust-analyzer
+          ] ++ pkgs.lib.optionals (pkgs.stdenv.isLinux) (with pkgs; [ cargo-watch ]);
+
+          shellHook = ''
+            cargo --version
+          '';
+        };
+      })
+    // {
+      overlay = final: prev: {
+        gh-ssh-keys = self.defaultPackage.${prev.system};
+      };
+    };
+}