build: add nix flake

.gitignore

@@ -1,2 +1,3 @@
 target
 out
+result

flake.lock

@@ -0,0 +1,61 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1694529238,
+        "narHash": "sha256-zsNZZGTGnMOf9YpHKJqMSsa0dXbfmxeoJ7xHlrt+xmY=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "ff7b65b44d01cf9ba6a71320833626af21126384",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1701253981,
+        "narHash": "sha256-ztaDIyZ7HrTAfEEUt9AtTDNoCYxUdSd6NrRHaYOIxtk=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "e92039b55bcd58469325ded85d4f58dd5a4eaf58",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs"
+      }
+    },
+    "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 +1,49 @@
+# Credit to https://github.com/srid/rust-nix-template/blob/master/flake.nix
+{
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
+    flake-utils.url = github:numtide/flake-utils;
+  };
+
+  outputs = { self, nixpkgs, flake-utils }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        cargoToml = builtins.fromTOML (builtins.readFile ./Cargo.toml);
+        pkgs = nixpkgs.legacyPackages.${system};
+        rust-toolchain = pkgs.symlinkJoin {
+          name = "rust-toolchain";
+          paths = with pkgs; [
+            rustc
+            cargo
+            cargo-watch
+            rust-analyzer
+            rustfmt
+          ];
+        };
+      in
+      rec {
+        # This builds the blog binary then runs it and collects the output. Once done it throws away the binary and
+        # shoves the newly created static site into the result.
+        packages.default = pkgs.rustPlatform.buildRustPackage {
+          name = "blog";
+          src = ./.;
+          cargoLock.lockFile = ./Cargo.lock;
+          postBuild = ''
+            ./target/*/release/blog
+          '';
+          installPhase = ''
+            cp -r ./out $out
+          '';
+        };
+
+        overlays.default = packages.default;
+        # Rust dev environment
+        devShells.default = pkgs.mkShell {
+          shellHook = ''
+            # For rust-analyzer 'hover' tooltips to work.
+            export RUST_SRC_PATH=${pkgs.rustPlatform.rustLibSrc}
+          '';
+          nativeBuildInputs = [ rust-toolchain ];
+        };
+      });
+}

shell.nix

@@ -0,0 +1 @@
+(builtins.getFlake ("git+file://" + toString ./.)).devShells.${builtins.currentSystem}.default