adding initial boilerplates

python/cli-click/settingsOptionsClass.py

@@ -0,0 +1,87 @@
+import click
+import sys
+import time
+
+
+def build_settings_option_class(settings_instance):
+    def set_default(default_name):
+        class Cls(click.Option):
+            def __init__(self, *args, **kwargs):
+                kwargs['default'] = getattr(settings_instance, default_name)
+                super(Cls, self).__init__(*args, **kwargs)
+
+            def handle_parse_result(self, ctx, opts, args):
+                obj = ctx.find_object(type(settings_instance))
+                if obj is None:
+                    ctx.obj = settings_instance
+
+                return super(Cls, self).handle_parse_result(ctx, opts, args)
+
+        return Cls
+
+    return set_default
+
+
+class Settings(object):
+    def __init__(self):
+        self.instance_disk_size = 100
+        self.instance_disk_type = 'pd-ssd'
+
+
+# import pudb; pudb.set_trace()
+settings = Settings()
+settings_option_cls = build_settings_option_class(settings)
+pass_settings = click.make_pass_decorator(Settings)
+
+
+@click.command()
+@click.help_option('-h', '--help')
+@click.option(
+    '-s',
+    '--disk-size',
+    cls=settings_option_cls('instance_disk_size'),
+    help="Disk size",
+    show_default=True,
+    type=int,
+)
+@click.option(
+    '-t',
+    '--disk-type',
+    cls=settings_option_cls('instance_disk_type'),
+    help="Disk type",
+    show_default=True,
+    type=click.Choice(['pd-standard', 'pd-ssd']),
+)
+@pass_settings
+def create(settings_test, disk_size, disk_type):
+    print(f'{settings_test.instance_disk_type=}')
+    print(f'{dir(settings_test)=}')
+    print(disk_size)
+    print(disk_type)
+
+
+if __name__ == "__main__":
+    commands = (
+        '-t pd-standard -s 200',
+        '-t pd-standard',
+        '-s 200',
+        '',
+        '--help',
+    )
+
+    time.sleep(1)
+    print('Click Version: {}'.format(click.__version__))
+    print('Python Version: {}'.format(sys.version))
+    for cmd in commands:
+        try:
+            time.sleep(0.1)
+            print('-----------')
+            print('> ' + cmd)
+            time.sleep(0.1)
+            create(cmd.split())
+
+        except BaseException as exc:
+            if str(exc) != '0' and not isinstance(
+                exc, (click.ClickException, SystemExit)
+            ):
+                raise