Initial commit

.envrc

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+dotenv
+use flake

.gitignore

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+/target
+/result
+/result-lib
+.direnv
+.env

Cargo.toml

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+[package]
+authors = ["Toby <toby@tobot.dev>"]
+name = "advent-of-code-2024"
+version = "24.0.0"
+edition = "2021"
+default-run = "get_input"
+
+[profile.release]
+strip = "symbols"
+lto = true
+opt-level = 3
+codegen-units = 1
+
+[profile.dev.package."*"]
+opt-level = 3
+codegen-units = 1
+[profile.release.package."*"]
+opt-level = 3
+codegen-units = 1
+[profile.release.build-override]
+codegen-units = 1
+
+[[bin]]
+name = "get_input"
+path = "src/get_input.rs"
+test = false
+
+[[bin]]
+name = "template"
+# day00 for alphabetic sorting
+path = "src/day00/main.rs"
+test = false
+
+[dependencies]
+reqwest = { version = "0.12.9", features = ["blocking"] }
+

LICENSE

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+MIT License
+
+Copyright (c) 2023 Sridhar Ratnakumar
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

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+A template Rust project with fully functional and no-frills Nix support, as well as builtin VSCode configuration to get IDE experience without any manual setup (just [install direnv](https://nixos.asia/en/direnv), open in VSCode and accept the suggestions).
+
+>[!NOTE]  
+> If you are looking for the original template based on [this blog post](https://srid.ca/rust-nix)'s use of `crate2nix`, browse from [this tag](https://github.com/srid/rust-nix-template/tree/crate2nix). The evolution of this template can be gleaned from [releases](https://github.com/srid/rust-nix-template/releases).
+
+## Adapting this template
+
+- Run `nix develop` to have a working shell ready before name change.
+- Change `name` in Cargo.toml.
+- Run `cargo generate-lockfile` in the nix shell
+- There are two CI workflows, and one of them uses Nix which is slower (unless you configure a cache) than the other that is based on rustup. Pick one or the other depending on your trade-offs.
+
+## Development (Flakes)
+
+This repo uses [Flakes](https://nixos.wiki/wiki/Flakes) from the get-go.
+
+```bash
+# Dev shell
+nix develop
+
+# or run via cargo
+nix develop -c cargo run
+
+# build
+nix build
+```
+
+We also provide a [`justfile`](https://just.systems/) for Makefile'esque commands.
+
+## Discussion
+
+- [Zulip](https://nixos.zulipchat.com/#narrow/stream/413950-nix)
+
+## See Also
+
+- [nixos.wiki: Packaging Rust projects with nix](https://nixos.wiki/wiki/Rust#Packaging_Rust_projects_with_nix)

flake.lock

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+{
+  "nodes": {
+    "fenix": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ],
+        "rust-analyzer-src": "rust-analyzer-src"
+      },
+      "locked": {
+        "lastModified": 1732689334,
+        "narHash": "sha256-yKI1KiZ0+bvDvfPTQ1ZT3oP/nIu3jPYm4dnbRd6hYg4=",
+        "owner": "nix-community",
+        "repo": "fenix",
+        "rev": "a8a983027ca02b363dfc82fbe3f7d9548a8d3dce",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "fenix",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1732837521,
+        "narHash": "sha256-jNRNr49UiuIwaarqijgdTR2qLPifxsVhlJrKzQ8XUIE=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "970e93b9f82e2a0f3675757eb0bfc73297cc6370",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "fenix": "fenix",
+        "nixpkgs": "nixpkgs",
+        "treefmt-nix": "treefmt-nix"
+      }
+    },
+    "rust-analyzer-src": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1732633904,
+        "narHash": "sha256-7VKcoLug9nbAN2txqVksWHHJplqK9Ou8dXjIZAIYSGc=",
+        "owner": "rust-lang",
+        "repo": "rust-analyzer",
+        "rev": "8d5e91c94f80c257ce6dbdfba7bd63a5e8a03fa6",
+        "type": "github"
+      },
+      "original": {
+        "owner": "rust-lang",
+        "ref": "nightly",
+        "repo": "rust-analyzer",
+        "type": "github"
+      }
+    },
+    "treefmt-nix": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1732894027,
+        "narHash": "sha256-2qbdorpq0TXHBWbVXaTqKoikN4bqAtAplTwGuII+oAc=",
+        "owner": "numtide",
+        "repo": "treefmt-nix",
+        "rev": "6209c381904cab55796c5d7350e89681d3b2a8ef",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "treefmt-nix",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

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+{
+  description = "A Nix-flake-based Rust development environment";
+
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
+
+    treefmt-nix = {
+      url = "github:numtide/treefmt-nix";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+
+    fenix = {
+      url = "github:nix-community/fenix";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+  };
+
+  outputs =
+    {
+      self,
+      nixpkgs,
+      treefmt-nix,
+      fenix,
+    }:
+    let
+      supportedSystems = [
+        "x86_64-linux"
+        "aarch64-linux"
+        "x86_64-darwin"
+        "aarch64-darwin"
+      ];
+      forEachSupportedSystem =
+        f:
+        nixpkgs.lib.genAttrs supportedSystems (
+          system:
+          f (
+            let
+              pkgs = import nixpkgs { inherit system; };
+              fenix' = (import fenix { inherit system pkgs; });
+              toolchain = fenix'.minimal;
+            in
+            {
+              inherit pkgs toolchain;
+            }
+          )
+        );
+    in
+    {
+      formatter = forEachSupportedSystem (
+        { pkgs, ... }: (treefmt-nix.lib.evalModule pkgs ./treefmt.nix).config.build.wrapper
+      );
+      devShells = forEachSupportedSystem (
+        { pkgs, toolchain }:
+        {
+          default = pkgs.mkShell {
+            LD_LIBRARY_PATH = pkgs.lib.makeLibraryPath [
+              pkgs.openssl
+            ];
+            PKG_CONFIG_PATH = "${pkgs.openssl.dev}/lib/pkgconfig";
+            packages =
+              [
+                pkgs.pkg-config
+              ]
+              ++ [
+                toolchain.cargo
+                toolchain.rustc
+              ];
+          };
+        }
+      );
+    };
+}

rust-toolchain.toml

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+[toolchain]
+channel = "stable"
+components = ["rustfmt", "cargo", "rustc", "rust-src"]

src/day00/input.txt

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+404 Not Found

src/day00/main.rs

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+const INPUT: &str = include_str!("./input.txt");
+
+pub fn main() {}

src/day00/part_1.rs

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+

src/day00/part_2.rs

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+

src/get_input.rs

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+use std::{env, error::Error, fs};
+
+use reqwest::blocking::Client;
+
+fn main() -> Result<(), Box<dyn Error>> {
+    let session = env!("SESSION");
+
+    let args: Vec<_> = env::args().collect();
+    let day = args[1].parse::<u8>()?;
+
+    let client = Client::builder().build()?;
+    let request = client
+        .get(format!("https://adventofcode.com/2024/day/{day}/input"))
+        .header("Cookie", format!("session={session}"))
+        .build()?;
+    let input = client.execute(request)?.text()?;
+    fs::create_dir_all(format!("src/day{day:02}/"))?;
+    fs::write(format!("src/day{day:02}/input.txt"), input)?;
+    Ok(())
+}

treefmt.nix

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+{ ... }:
+{
+  projectRootFile = "flake.nix";
+  programs = {
+    nixfmt.enable = true;
+    rustfmt.enable = true;
+  };
+}