hello world

.envrc

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+use flake

.gitignore

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+/target
+.direnv

Cargo.toml

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+[package]
+name = "uwuchummer"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+iced = {version = "0.13.1", features = []}

flake.lock

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+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1728018373,
+        "narHash": "sha256-NOiTvBbRLIOe5F6RbHaAh6++BNjsb149fGZd1T4+KBg=",
+        "rev": "bc947f541ae55e999ffdb4013441347d83b00feb",
+        "revCount": 688563,
+        "type": "tarball",
+        "url": "https://api.flakehub.com/f/pinned/NixOS/nixpkgs/0.1.688563%2Brev-bc947f541ae55e999ffdb4013441347d83b00feb/01925b66-3b70-71bd-b277-924a6c208ba7/source.tar.gz"
+      },
+      "original": {
+        "type": "tarball",
+        "url": "https://flakehub.com/f/NixOS/nixpkgs/0.1.%2A.tar.gz"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs",
+        "rust-overlay": "rust-overlay"
+      }
+    },
+    "rust-overlay": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1728786660,
+        "narHash": "sha256-qY+1e0o6oV5ySlErhj/dsWsPLWjrMKzq4QI7a1t9/Ps=",
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "rev": "174a8d9cec9e2c23877a7b887c52b68ef0421d8b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

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+{
+  description = "A Nix-flake-based Rust development environment";
+
+  inputs = {
+    nixpkgs.url = "https://flakehub.com/f/NixOS/nixpkgs/0.1.*.tar.gz";
+    rust-overlay = {
+      url = "github:oxalica/rust-overlay";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+  };
+
+  outputs = { self, nixpkgs, rust-overlay }:
+    let
+      supportedSystems = [ "x86_64-linux" "aarch64-linux" "x86_64-darwin" "aarch64-darwin" ];
+      forEachSupportedSystem = f: nixpkgs.lib.genAttrs supportedSystems (system: f {
+        pkgs = import nixpkgs {
+          inherit system;
+          overlays = [ rust-overlay.overlays.default self.overlays.default ];
+        };
+      });
+    in
+    {
+      overlays.default = final: prev: {
+        rustToolchain =
+          let
+            rust = prev.rust-bin;
+          in
+          if builtins.pathExists ./rust-toolchain.toml then
+            rust.fromRustupToolchainFile ./rust-toolchain.toml
+          else if builtins.pathExists ./rust-toolchain then
+            rust.fromRustupToolchainFile ./rust-toolchain
+          else
+            rust.stable.latest.default.override {
+              extensions = [ "rust-src" "rustfmt" ];
+            };
+      };
+
+      devShells = forEachSupportedSystem ({ pkgs }: {
+        default = pkgs.mkShell {
+          packages = with pkgs; [
+            rustToolchain
+            openssl
+            pkg-config
+            cargo-deny
+            cargo-edit
+            cargo-watch
+            rust-analyzer
+            git
+          ];
+
+          env = {
+            # Required by rust-analyzer
+            RUST_SRC_PATH = "${pkgs.rustToolchain}/lib/rustlib/src/rust/library";
+          };
+        };
+      });
+    };
+}

src/main.rs

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+use iced::widget::{button, column, text, Column};
+
+#[derive(Default)]
+struct Counter {
+    value: i32,
+}
+
+#[derive(Debug, Clone, Copy)]
+pub enum Message {
+    Increment,
+    Decrement,
+}
+
+impl Counter {
+    pub fn view(&self) -> Column<Message> {
+        // We use a column: a simple vertical layout
+        column![
+            // The increment button. We tell it to produce an
+            // `Increment` message when pressed
+            button("+").on_press(Message::Increment),
+            // We show the value of the counter here
+            text(self.value).size(50),
+            // The decrement button. We tell it to produce a
+            // `Decrement` message when pressed
+            button("-").on_press(Message::Decrement),
+        ]
+    }
+
+    pub fn update(&mut self, message: Message) {
+        match message {
+            Message::Increment => {
+                self.value += 1;
+            }
+            Message::Decrement => {
+                self.value -= 1;
+            }
+        }
+    }
+}
+
+fn main() -> iced::Result {
+    iced::run("A cool counter", Counter::update, Counter::view)
+}