added a nix flake for building

.gitignore

@@ -1,2 +1,3 @@
 /target
 /themes
+/result

build.rs

@@ -1,15 +1,33 @@
-use std::fs::{File, create_dir};
-use std::path::Path;
+use std::fs::File;
+use std::path::PathBuf;
+
+// This file is kind of ugly, I tried to make nix build work
 
 fn main() {
-    let dest_path = Path::new("themes/Catppuccin-Macchiato.tmTheme");
+    let manifest_dir = std::env::var("CARGO_MANIFEST_DIR").unwrap();
+    let local_theme_path = PathBuf::from(&manifest_dir).join("themes/Catppuccin-Macchiato.tmTheme");
+
+    let final_path = if let Ok(nix_theme_path) = std::env::var("THEME_PATH") {
+        // In case of nix build
+        println!("cargo:rerun-if-env-changed=THEME_PATH");
+        nix_theme_path
+    } else {
+        // In case of cargo
+        if !local_theme_path.exists() {
+            println!("cargo:warning=Theme not found, downloading...");
+
+            std::fs::create_dir_all(local_theme_path.parent().unwrap())
+                .expect("Could not create themes directory");
 
-    if !dest_path.exists() {
             let mut response = reqwest::blocking::get("https://raw.githubusercontent.com/catppuccin/bat/refs/heads/main/themes/Catppuccin%20Macchiato.tmTheme")
                 .expect("Failed to download theme");
 
-        create_dir("themes").expect("Could not create themes dir");
-        let mut file = File::create(dest_path).expect("Failed to create theme file");
+            let mut file = File::create(&local_theme_path).expect("Failed to create theme file");
             std::io::copy(&mut response, &mut file).expect("Failed to save theme");
         }
+
+        local_theme_path.to_str().unwrap().to_string()
+    };
+
+    println!("cargo:rustc-env=THEME_FILE_PATH={}", final_path);
 }

flake.lock

@@ -0,0 +1,109 @@
+{
+  "nodes": {
+    "code-theme": {
+      "flake": false,
+      "locked": {
+        "narHash": "sha256-28LGXKITHbrmt6qrcG/W+qTlaWthre7x7izp/TPjQgA=",
+        "type": "file",
+        "url": "https://raw.githubusercontent.com/catppuccin/bat/refs/heads/main/themes/Catppuccin%20Macchiato.tmTheme"
+      },
+      "original": {
+        "type": "file",
+        "url": "https://raw.githubusercontent.com/catppuccin/bat/refs/heads/main/themes/Catppuccin%20Macchiato.tmTheme"
+      }
+    },
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1731533236,
+        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1767767207,
+        "narHash": "sha256-Mj3d3PfwltLmukFal5i3fFt27L6NiKXdBezC1EBuZs4=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "5912c1772a44e31bf1c63c0390b90501e5026886",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs_2": {
+      "locked": {
+        "lastModified": 1744536153,
+        "narHash": "sha256-awS2zRgF4uTwrOKwwiJcByDzDOdo3Q1rPZbiHQg/N38=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "18dd725c29603f582cf1900e0d25f9f1063dbf11",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "code-theme": "code-theme",
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs",
+        "rust-overlay": "rust-overlay"
+      }
+    },
+    "rust-overlay": {
+      "inputs": {
+        "nixpkgs": "nixpkgs_2"
+      },
+      "locked": {
+        "lastModified": 1767754000,
+        "narHash": "sha256-znoNJs2QZFl+wCFLd6FbUJ00c74kvzOjyQYXc45uFvo=",
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "rev": "0b3a5ad260479f2c9bdadf3ba5b2a4be359cfcdd",
+        "type": "github"
+      },
+      "original": {
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "type": "github"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,64 @@
+{
+  description = "Blog website";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+    rust-overlay.url = "github:oxalica/rust-overlay";
+
+    code-theme = {
+      url = "https://raw.githubusercontent.com/catppuccin/bat/refs/heads/main/themes/Catppuccin%20Macchiato.tmTheme";
+      flake = false;
+    };
+  };
+
+  outputs = { nixpkgs, flake-utils, rust-overlay, code-theme, ... }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        overlays = [ rust-overlay.overlays.default ];
+        pkgs = import nixpkgs {
+          inherit system overlays;
+        };
+        rust = pkgs.rust-bin.stable.latest.default;
+        openssl = pkgs.openssl;
+      in
+      {
+        packages.default = pkgs.rustPlatform.buildRustPackage {
+          pname = "blog";
+          version = "0.1.0";
+
+          src = ./.;
+
+          THEME_PATH = "${code-theme}";
+
+          cargoLock = {
+            lockFile = ./Cargo.lock;
+          };
+
+          nativeBuildInputs = [
+            rust
+            pkgs.pkg-config
+          ];
+
+          buildInputs = [
+            openssl
+          ];
+
+          OPENSSL_LIB_DIR = "${openssl.out}/lib";
+          OPENSSL_INCLUDE_DIR = "${openssl.dev}/include";
+          PKG_CONFIG_PATH = "${openssl.dev}/lib/pkgconfig";
+        };
+
+        devShells.default = pkgs.mkShell {
+          packages = [
+            rust
+            pkgs.cargo
+            pkgs.rust-analyzer
+            pkgs.pkg-config
+            openssl
+          ];
+          OPENSSL_DIR = openssl.dev;
+          PKG_CONFIG_PATH = "${openssl.dev}/lib/pkgconfig";
+        };
+      });
+}

src/main.rs

@@ -34,7 +34,8 @@ lazy_static! {
     pub static ref THEME_SET: ThemeSet = {
         let mut set = ThemeSet::load_defaults();
 
-        let theme_bytes = include_bytes!("../themes/Catppuccin-Macchiato.tmTheme");
+        // let theme_bytes = include_bytes!("../themes/Catppuccin-Macchiato.tmTheme");
+        let theme_bytes = include_bytes!(env!("THEME_FILE_PATH"));
 
         let mut cursor = Cursor::new(theme_bytes);
         match syntect::highlighting::ThemeSet::load_from_reader(&mut cursor) {