add dev flake

.envrc

@@ -0,0 +1 @@
+use flake

.gitignore

@@ -1,3 +1,2 @@
 /target
 **/*.rs.bk
-Cargo.lock

Cargo.lock

@@ -0,0 +1,41 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "autocfg"
+version = "1.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ace50bade8e6234aa140d9a2f552bbee1db4d353f69b8217bc503490fc1a9f26"
+
+[[package]]
+name = "bytemuck"
+version = "1.23.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9134a6ef01ce4b366b50689c94f82c14bc72bc5d0386829828a2e2752ef7958c"
+
+[[package]]
+name = "contrast"
+version = "0.1.0"
+dependencies = [
+ "num-traits",
+ "rgb",
+]
+
+[[package]]
+name = "num-traits"
+version = "0.2.19"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "071dfc062690e90b734c0b2273ce72ad0ffa95f0c74596bc250dcfd960262841"
+dependencies = [
+ "autocfg",
+]
+
+[[package]]
+name = "rgb"
+version = "0.8.50"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "57397d16646700483b67d2dd6511d79318f9d057fdbd21a4066aeac8b41d310a"
+dependencies = [
+ "bytemuck",
+]

README.md

@@ -1,13 +1,14 @@
 # Contrast
 
-Calculate contrast between two colors as specified by [WCAG 2](http://www.w3.org/TR/WCAG20#contrast-ratiodef)
+Calculate contrast between two colors as specified by
+[WCAG 2](http://www.w3.org/TR/WCAG20#contrast-ratiodef)
 
 # Usage
 
 ```rust
 use contrast::contrast;
 use rgb::RGB8;
-///
+
 fn main() {
     let contrast: f32 = contrast(RGB8::from([255, 255, 255]), RGB8::from([255, 255, 0]));
     assert_eq!(contrast, 1.0738392);
@@ -18,14 +19,15 @@ fn main() {
 
 Licensed under either of
 
-* Apache License, Version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or https://www.apache.org/licenses/LICENSE-2.0)
-* MIT license ([LICENSE-MIT](LICENSE-MIT) or https://opensource.org/licenses/MIT)
+- Apache License, Version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+  https://www.apache.org/licenses/LICENSE-2.0)
+- MIT license ([LICENSE-MIT](LICENSE-MIT) or
+  https://opensource.org/licenses/MIT)
 
 at your option.
 
 ### Contribution
 
-Unless you explicitly state otherwise, any contribution intentionally
-submitted for inclusion in the work by you, as defined in the Apache-2.0
-license, shall be dual licensed as above, without any additional terms or
-conditions.
+Unless you explicitly state otherwise, any contribution intentionally submitted
+for inclusion in the work by you, as defined in the Apache-2.0 license, shall be
+dual licensed as above, without any additional terms or conditions.

flake.lock

@@ -0,0 +1,107 @@
+{
+  "nodes": {
+    "crane": {
+      "locked": {
+        "lastModified": 1742394900,
+        "narHash": "sha256-vVOAp9ahvnU+fQoKd4SEXB2JG2wbENkpqcwlkIXgUC0=",
+        "owner": "ipetkov",
+        "repo": "crane",
+        "rev": "70947c1908108c0c551ddfd73d4f750ff2ea67cd",
+        "type": "github"
+      },
+      "original": {
+        "owner": "ipetkov",
+        "repo": "crane",
+        "type": "github"
+      }
+    },
+    "flakelight": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1748263617,
+        "narHash": "sha256-O1xypYFWzYlfiyO3fUZuzRhYac5DGptP+ZhocY9L5tQ=",
+        "owner": "nix-community",
+        "repo": "flakelight",
+        "rev": "65c783ba2b85910df5a053cb1451e9eb13794c12",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "flakelight",
+        "type": "github"
+      }
+    },
+    "mill-scale": {
+      "inputs": {
+        "crane": "crane",
+        "flakelight": [
+          "flakelight"
+        ],
+        "rust-overlay": "rust-overlay"
+      },
+      "locked": {
+        "lastModified": 1748205441,
+        "narHash": "sha256-W+UUBT/l1DSTZo5G43494mRNNspJ2i9jW2QELC9JuMQ=",
+        "ref": "refs/heads/main",
+        "rev": "dac3b74a89cebbeb21cc6602e4a346604adbee8b",
+        "revCount": 49,
+        "type": "git",
+        "url": "https://codeberg.org/icewind/mill-scale.git"
+      },
+      "original": {
+        "type": "git",
+        "url": "https://codeberg.org/icewind/mill-scale.git"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1748437600,
+        "narHash": "sha256-hYKMs3ilp09anGO7xzfGs3JqEgUqFMnZ8GMAqI6/k04=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "7282cb574e0607e65224d33be8241eae7cfe0979",
+        "type": "github"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "ref": "nixos-25.05",
+        "type": "indirect"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flakelight": "flakelight",
+        "mill-scale": "mill-scale",
+        "nixpkgs": "nixpkgs"
+      }
+    },
+    "rust-overlay": {
+      "inputs": {
+        "nixpkgs": [
+          "mill-scale",
+          "flakelight",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1742697269,
+        "narHash": "sha256-Lpp0XyAtIl1oGJzNmTiTGLhTkcUjwSkEb0gOiNzYFGM=",
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "rev": "01973c84732f9275c50c5f075dd1f54cc04b3316",
+        "type": "github"
+      },
+      "original": {
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,16 @@
+{
+  inputs = {
+    nixpkgs.url = "nixpkgs/nixos-25.05";
+    flakelight = {
+      url = "github:nix-community/flakelight";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+    mill-scale = {
+      url = "git+https://codeberg.org/icewind/mill-scale.git";
+      inputs.flakelight.follows = "flakelight";
+    };
+  };
+  outputs = {mill-scale, ...}:
+    mill-scale ./. {
+    };
+}