added CLI to create a connection

openbis_connection/main.py

+import click
+import yaml
+import pathlib
+from notebook import notebookapp
+filepaths = notebookapp.jupyter_config_path()
+
+@click.command()
+@click.option('--name', '-n', prompt="Name of the connection")
+@click.option('--hostname', '-h', prompt="Hostname of your openBIS instance")
+@click.option('--verfiy/--no-verify', default=True, prompt="Verify server certificate")
+@click.option('--https/--no-https', default=True, prompt="Use secure connection?")
+@click.option('--username', '-u', default='', prompt="Username to connect to the openBIS instance")
+@click.option('--password', '-p', default='', prompt="Password to connect to the openBIS instance")
+@click.option('--destination', '-d', type=click.Choice(filepaths), show_default=True, default=filepaths[0], prompt="Destination where you want to store the configuration")
+@click.pass_context
+def cli(ctx, name=None, hostname=None, verfiy=True, https=True, username=None, password=None, destination=None):
+    """Generate an openBIS connection file for use in Jupyter notebooks.
+    """
+
+    config_filepath = pathlib.Path(destination) / 'openbis-connections.yaml'
+    if config_filepath.exists():
+        if not click.confirm(f"A configuration file already exists in {config_filepath}. Do you want to overwrite?"):
+            ctx.exit(code=0)
+
+    connection = {
+        "name"                : name,
+        "url"                 : hostname,
+        "verify_certificates" : verfiy, 
+    }
+    if username: connection['username'] = username
+    if password: connection['password'] = password
+    if not https: connection['http_only'] = True
+    
+    template = {}
+    template['connections'] = [connection]
+
+    yaml_object = yaml.dump(template)
+    with open(config_filepath, "w") as outfile:
+        outfile.write(yaml_object)
+    print(f"sample openBIS connection file written to {config_filepath}")
+
+if __name__ == '__main__':
+    cli()