Added flake.nix

Author: Yves Pares

flake.lock

@@ -0,0 +1,24 @@
+{
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs/nixpkgs-unstable";
+  };
+
+  outputs = inputs:
+    let forEachSystem = inputs.nixpkgs.lib.genAttrs inputs.nixpkgs.lib.systems.flakeExposed;
+    in {
+      packages = forEachSystem (system:
+        let pkgs = import inputs.nixpkgs { inherit system; };
+            jj-fzf = pkgs.writeShellApplication {
+              name = "jj-fzf";
+              runtimeInputs = with pkgs; [ jujutsu fzf gawk gnused ];
+              text = ''
+                ${./jj-fzf} "$@"
+              '';
+            };
+        in {
+          inherit jj-fzf;
+          default = jj-fzf;
+        }
+      );
+    };
+}