nix-pin: 0.1.2 -> 0.2.2 and add updateScript

pkgs/tools/package-management/nix-pin/default.nix

@@ -1,12 +1,12 @@
 { pkgs, stdenv, fetchFromGitHub, mypy, python3 }:
 let self = stdenv.mkDerivation rec {
   name = "nix-pin-${version}";
-  version = "0.1.2";
+  version = "0.2.2";
   src = fetchFromGitHub {
     owner = "timbertson";
     repo = "nix-pin";
-    rev = "version-0.1.2";
-    sha256 = "1zwfb5198qzbjwivgiaxbwva9frgrrqaj92nw8vz95yi08pijssh";
+    rev = "version-0.2.2";
+    sha256 = "1kw43kzy4m6lnnif51r2a8i4vcgr7d4vqb1c75p7pk2b9y3jwxsz";
   };
   buildInputs = [ python3 mypy ];
   buildPhase = ''
@@ -16,12 +16,27 @@ let self = stdenv.mkDerivation rec {
     mkdir "$out"
     cp -r bin share "$out"
   '';
-  passthru = {
-    callWithPins = path: args:
-      import "${self}/share/nix/call.nix" {
-        inherit pkgs path args;
-      };
-  };
+  passthru =
+    let
+      defaults = import "${self}/share/nix/defaults.nix";
+    in {
+      api = { pinConfig ? defaults.pinConfig }:
+        let impl = import "${self}/share/nix/api.nix" { inherit pkgs pinConfig; }; in
+        { inherit (impl) augmentedPkgs pins callPackage; };
+      updateScript = ''
+        set -e
+        echo
+        cd ${toString ./.}
+        ${pkgs.nix-update-source}/bin/nix-update-source \
+          --prompt version \
+          --replace-attr version \
+          --set owner timbertson \
+          --set repo nix-pin \
+          --set type fetchFromGitHub \
+          --set rev 'version-{version}' \
+          --modify-nix default.nix
+      '';
+    };
   meta = with stdenv.lib; {
     homepage = "https://github.com/timbertson/nix-pin";
     description = "nixpkgs development utility";