added sqlfmt

sqlfmt/flake.nix

@@ -0,0 +1,34 @@
+{
+  description = "sqlfmt packaged using poetry2nix";
+
+  inputs = {
+    flake-utils.url = "github:numtide/flake-utils";
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable-small";
+    poetry2nix = {
+      url = "github:nix-community/poetry2nix";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+  };
+
+  outputs = { self, nixpkgs, flake-utils, poetry2nix }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = nixpkgs.legacyPackages.${system};
+
+        src = pkgs.fetchFromGitHub {
+          owner = "tconbeer";
+          repo = "sqlfmt";
+          rev = "v0.21.3";
+          sha256 = "1sx8gf13pwsw63v5hfnml18fs2lnb2piigc1d4q8hmiywzmhzf85";
+        };
+        inherit (poetry2nix.lib.mkPoetry2Nix { inherit pkgs; }) mkPoetryApplication;
+      in
+      {
+        packages = {
+          sqlfmt = mkPoetryApplication {
+            projectDir = src;
+          };
+          default = self.packages.${system}.sqlfmt;
+        };
+      });
+}