WIP: templates: add rust

TODO: find out if I can use the `cargoLock` FOD to run `clippy`.

templates/rust/.envrc

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+use flake
+
+eval "$shellHooks"

templates/rust/.gitignore

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+# Rust build directory
+/target
+
+# Nix generated files
+/.pre-commit-config.yaml
+/result

templates/rust/.woodpecker/check.yml

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+labels:
+  type: exec
+
+pipeline:
+- name: pre-commit checks
+  image: bash
+  commands:
+  - nix shell . -c pre-commit run --all
+
+- name: nix flake check
+  image: bash
+  commands:
+  - nix flake check
+
+- name: notifiy
+  image: bash
+  secrets:
+  - source: matrix_homeserver
+    target: address
+  - source: matrix_roomid
+    target: room
+  - source: matrix_username
+    target: user
+  - source: matrix_password
+    target: pass
+  commands:
+  - nix run '.#matrix-notifier'
+  when:
+    status:
+    - failure
+    - success

templates/rust/Cargo.lock

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+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "project"
+version = "0.0.0"

templates/rust/Cargo.toml

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+[package]
+name = "project"
+version = "0.0.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

templates/rust/flake.nix

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+{
+  description = "A C++ project";
+
+  inputs = {
+    futils = {
+      type = "github";
+      owner = "numtide";
+      repo = "flake-utils";
+      ref = "main";
+    };
+
+    nixpkgs = {
+      type = "github";
+      owner = "NixOS";
+      repo = "nixpkgs";
+      ref = "nixos-unstable";
+    };
+
+    pre-commit-hooks = {
+      type = "github";
+      owner = "cachix";
+      repo = "pre-commit-hooks.nix";
+      ref = "master";
+      inputs = {
+        flake-utils.follows = "futils";
+        nixpkgs.follows = "nixpkgs";
+      };
+    };
+  };
+
+  outputs = { self, futils, nixpkgs, pre-commit-hooks }:
+    {
+      overlays = {
+        default = final: _prev: {
+          project = with final; rustPlatform.buildRustPackage {
+            pname = "project";
+            version = (final.lib.importTOML ./Cargo.toml).package.version;
+
+            src = self;
+
+            cargoLock = {
+              lockFile = "${self}/Cargo.lock";
+            };
+
+            doCheck = true;
+
+            meta = with lib; {
+              description = "A Rust project";
+              homepage = "https://gitea.belanyi.fr/ambroisie/project";
+              license = licenses.mit;
+              maintainers = with maintainers; [ ambroisie ];
+            };
+          };
+        };
+      };
+    } // futils.lib.eachDefaultSystem (system:
+      let
+        pkgs = import nixpkgs {
+          inherit system;
+          overlays = [
+            self.overlays.default
+          ];
+        };
+
+        pre-commit = pre-commit-hooks.lib.${system}.run {
+          src = self;
+
+          hooks = {
+            clippy = {
+              enable = true;
+            };
+
+            nixpkgs-fmt = {
+              enable = true;
+            };
+
+            rustfmt = {
+              enable = true;
+            };
+          };
+        };
+      in
+      {
+        checks = {
+          inherit (self.packages.${system}) project;
+        };
+
+        devShells = {
+          default = pkgs.mkShell {
+            inputsFrom = with self.packages.${system}; [
+              project
+            ];
+
+            packages = with pkgs; [
+              rust-analyzer
+            ];
+
+            RUST_SRC_PATH = "${pkgs.rust.packages.stable.rustPlatform.rustLibSrc}";
+
+            inherit (pre-commit) shellHook;
+          };
+        };
+
+        packages = futils.lib.flattenTree {
+          default = pkgs.project;
+          inherit (pkgs) project;
+        };
+      });
+}

templates/rust/src/main.rs

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+fn main() {
+    println!("Hello, world!");
+}