adding initial boilerplates

python/cli-click/multipleSubCommands-use.py

@@ -0,0 +1,15 @@
+import click
+from complex.cli import pass_environment
+
+
+@click.command('init', short_help='Initializes a repo.')
+@click.argument('path', required=False, type=click.Path(resolve_path=True))
+@pass_environment
+def cli(ctx, path):
+    """Initializes a repository."""
+    print(f'{ctx=}')
+    print(f'{dir(ctx)=}')
+    if path is None:
+        path = ctx.home
+    ctx.log('Initialized the repository in %s',
+            click.format_filename(path))

python/cli-click/multipleSubCommands.py

@@ -0,0 +1,64 @@
+import os
+import sys
+import click
+
+CONTEXT_SETTINGS = dict(auto_envvar_prefix='COMPLEX')
+
+
+class Environment(object):
+
+    def __init__(self):
+        self.verbose = False
+        self.home = os.getcwd()
+
+    def log(self, msg, *args):
+        """Logs a message to stderr."""
+        if args:
+            msg %= args
+        click.echo(msg, file=sys.stderr)
+
+    def vlog(self, msg, *args):
+        """Logs a message to stderr only if verbose is enabled."""
+        if self.verbose:
+            self.log(msg, *args)
+
+
+pass_environment = click.make_pass_decorator(Environment, ensure=True)
+cmd_folder = os.path.abspath(os.path.join(os.path.dirname(__file__),
+                                          'commands'))
+
+
+class ComplexCLI(click.MultiCommand):
+
+    def list_commands(self, ctx):
+        rv = []
+        for filename in os.listdir(cmd_folder):
+            if filename.endswith('.py') and \
+               filename.startswith('cmd_'):
+                rv.append(filename[4:-3])
+        rv.sort()
+        return rv
+
+    def get_command(self, ctx, name):
+        try:
+            if sys.version_info[0] == 2:
+                name = name.encode('ascii', 'replace')
+            mod = __import__('complex.commands.cmd_' + name,
+                             None, None, ['cli'])
+        except ImportError:
+            return
+        return mod.cli
+
+
+@click.command(cls=ComplexCLI, context_settings=CONTEXT_SETTINGS)
+@click.option('--home', type=click.Path(exists=True, file_okay=False,
+                                        resolve_path=True),
+              help='Changes the folder to operate on.')
+@click.option('-v', '--verbose', is_flag=True,
+              help='Enables verbose mode.')
+@pass_environment
+def cli(ctx, verbose, home):
+    """A complex command line interface."""
+    ctx.verbose = verbose
+    if home is not None:
+        ctx.home = home

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