feat: Add Nix flake support

6 files changed, 102 insertions, 2 deletions

diff --git a/.gitignore b/.gitignore
index 034047c..076eff8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 iku
+result
diff --git a/README.md b/README.md
index 53da068..84f3f45 100644
--- a/README.md
+++ b/README.md
@@ -25,6 +25,12 @@ Iku runs `go fmt` first, then applies its grammar-based blank-line rules on top
 go install github.com/Fuwn/iku@latest
 ```
 
+Or run with Nix:
+
+```bash
+nix run github:Fuwn/iku
+```
+
 ## Usage
 
 ```bash
diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..683a0b9
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,58 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1731533236,
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1769740369,
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "6308c3b21396534d8aaeac46179c14c439a89b8a",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..1e7f318
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,35 @@
+{
+  description = "Grammar-Aware Go Formatter";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { self, nixpkgs, flake-utils, ... }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = import nixpkgs { inherit system; };
+        version = self.shortRev or "dirty";
+      in {
+        packages.default = pkgs.buildGo125Module {
+          inherit version;
+
+          pname = "iku";
+          src = pkgs.lib.cleanSource ./.;
+          vendorHash = null;
+          ldflags = [ "-s" "-w" "-X main.version=${version}" ];
+
+          meta = with pkgs.lib; {
+            description = "Grammar-Aware Go Formatter";
+            homepage = "https://github.com/Fuwn/iku";
+            license = licenses.gpl3Only;
+            platforms = platforms.unix;
+          };
+        };
+
+        devShells.default = pkgs.mkShell {
+          buildInputs = [ pkgs.go_1_25 ];
+        };
+      });
+}
diff --git a/go.mod b/go.mod
index 24a6519..084f6e5 100644
--- a/go.mod
+++ b/go.mod
@@ -1,3 +1,3 @@
 module github.com/Fuwn/iku
 
-go 1.25.6
+go 1.25
diff --git a/main.go b/main.go
index daa54d8..2e6c7a0 100644
--- a/main.go
+++ b/main.go
@@ -31,7 +31,7 @@ func main() {
 	flag.Parse()
 
 	if *versionFlag {
-		fmt.Println("iku", version)
+		fmt.Printf("%s (%s)\n", version, runtime.Version())
 		os.Exit(0)
 	}