pngtools: init at unstable-2022-03-14 (#169875)

pkgs/tools/graphics/pngtools/default.nix

···
+{ lib, stdenv, libpng12, fetchFromGitHub }:
+
+stdenv.mkDerivation {
+  pname = "pngtools";
+  version = "unstable-2022-03-14";
+
+  src = fetchFromGitHub {
+    owner = "mikalstill";
+    repo = "pngtools";
+    rev = "1ccca3a0f3f6882661bbafbfb62feb774ca195d1";
+    sha256 = "sha256-W1XofOVTyfA7IbxOnTkWdOOZ00gZ4e0GOYl7nMtLIJk=";
+  };
+
+  buildInputs = [ libpng12 ];
+
+  meta = with lib; {
+    homepage = "https://github.com/mikalstill/pngtools";
+    description = "PNG manipulation tools";
+    maintainers = with maintainers; [ zendo ];
+    license = licenses.gpl2Only;
+    platforms = platforms.all;
+  };
+}

pkgs/top-level/all-packages.nix

···
     libpng = libpng12;
   };
 
+  pngtools = callPackage ../tools/graphics/pngtools { };
+
   pngpp = callPackage ../development/libraries/png++ { };
 
   pngquant = callPackage ../tools/graphics/pngquant { };