python.pkgs.flask_script: move to a separate file

pkgs/development/python-modules/flask-script/default.nix

@@ -0,0 +1,21 @@
+{ lib, buildPythonPackage, fetchurl, flask, pytest }:
+
+buildPythonPackage rec {
+  name = "Flask-Script-${version}";
+  version = "2.0.6";
+
+  src = fetchurl {
+    url = "mirror://pypi/F/Flask-Script/${name}.tar.gz";
+    sha256 = "0zqh2yq8zk7m9b4xw1ryqmrljkdigfb3hk5155a3b5hkfnn6xxyf";
+  };
+
+  propagatedBuildInputs = [ flask ];
+  checkInputs = [ pytest ];
+
+  meta = with lib; {
+    homepage = http://github.com/smurfix/flask-script;
+    description = "Scripting support for Flask";
+    license = licenses.bsd3;
+    maintainers = with maintainers; [ abbradar ];
+  };
+}

pkgs/top-level/python-packages.nix

@@ -7685,26 +7685,7 @@ in {
 
   flask-restplus = callPackage ../development/python-modules/flask-restplus { };
 
-  flask_script = buildPythonPackage rec {
+  flask_script = callPackage ../development/python-modules/flask-script { };
-    name = "Flask-Script-${version}";
-    version = "2.0.5";
-
-    src = pkgs.fetchurl {
-      url = "mirror://pypi/F/Flask-Script/${name}.tar.gz";
-      sha256 = "0zqh2yq8zk7m9b4xw1ryqmrljkdigfb3hk5155a3b5hkfnn6xxyf";
-    };
-
-    nativeBuildInputs = with self; [ pytest ];
-    propagatedBuildInputs = with self; [ flask ];
-
-    meta = {
-      homepage = "http://github.com/smurfix/flask-script";
-      description = "Scripting support for Flask";
-      license = licenses.bsd3;
-      platforms = platforms.all;
-      maintainers = with maintainers; [ abbradar ];
-    };
-  };
 
   flask_sqlalchemy = buildPythonPackage rec {
     name = "Flask-SQLAlchemy-${version}";