perf(core): implement lazy loading for heavy services, Google SDK and CLI forms

- Defer instantiation of heavy services (SyncService, UserService,
  ImportExportService, SystemService, ExecutionService) using cached
  properties in ServiceProvider and module __getattr__ in services.
- Defer Google Drive SDK imports in sync_service.py using module-level
  __getattr__ and _get_google_libs() helper while retaining mock patchability.
- Lazy load inquirer, Forms, Validators and Blessed theme adapters in
  connpy/cli/* to prevent loading CLI form dependencies at startup.
- Clean up unused top-level service imports in connapp.py.

connpy/cli/forms.py

@@ -1,5 +1,4 @@
 import ast
-import inquirer
 from .validators import Validators
 
 class Forms:
@@ -8,6 +7,7 @@ class Forms:
         self.validators = Validators(app)
 
     def questions_edit(self):
+        import inquirer
         questions = []
         questions.append(inquirer.Confirm("host", message="Edit Hostname/IP?"))
         questions.append(inquirer.Confirm("protocol", message="Edit Protocol/app?"))
@@ -21,6 +21,7 @@ class Forms:
         return inquirer.prompt(questions)
 
     def questions_nodes(self, unique, uniques=None, edit=None):
+        import inquirer
         try:
             defaults = self.app.services.nodes.get_node_details(unique)
             if "tags" not in defaults:
@@ -98,6 +99,7 @@ class Forms:
         return result
 
     def questions_profiles(self, unique, edit=None):
+        import inquirer
         try:
             defaults = self.app.services.profiles.get_profile(unique, resolve=False)
             if "tags" not in defaults:
@@ -163,6 +165,7 @@ class Forms:
         return result
 
     def questions_bulk(self, nodes="", hosts=""):
+        import inquirer
         questions = []
         questions.append(inquirer.Text("ids", message="add a comma separated list of nodes to add", default=nodes, validate=self.validators.bulk_node_validation))
         questions.append(inquirer.Text("location", message="Add a @folder, @subfolder@folder or leave empty", validate=self.validators.bulk_folder_validation))
@@ -200,6 +203,7 @@ class Forms:
 
     def mcp_wizard(self, mcp_servers):
         """Interactive wizard to manage MCP servers."""
+        import inquirer
         from .helpers import theme
         
         while True:

connpy/cli/helpers.py

@@ -1,6 +1,4 @@
 import os
-import inquirer
-from inquirer.themes import Default, term
 
 try:
     from pyfzf.pyfzf import FzfPrompt
@@ -9,6 +7,7 @@ except ImportError:
 
 def hex_to_blessed(hex_str):
     """Convert hex color string to blessed/ansi format."""
+    from inquirer.themes import term
     if not hex_str or not isinstance(hex_str, str):
         return term.normal
     
@@ -42,8 +41,11 @@ def hex_to_blessed(hex_str):
     except:
         return prefix + term.normal
 
-# Custom inquirer theme matching connpy colors
+def get_theme():
-class ConnpyTheme(Default):
+    """Returns a fresh instance of the theme with current colors."""
+    from inquirer.themes import Default, term
+
+    class ConnpyTheme(Default):
         def __init__(self):
             super().__init__()
             try:
@@ -61,8 +63,6 @@ class ConnpyTheme(Default):
                 self.List.selection_color = term.bold_cyan
                 self.List.selection_cursor = ">"
 
-def get_theme():
-    """Returns a fresh instance of the theme with current colors."""
     return ConnpyTheme()
 
 class ThemeProxy:
@@ -126,6 +126,7 @@ def choose(app, list_, name, action):
         else:
             return answer[0]
     else:
+        import inquirer
         questions = [inquirer.List(name, message="Pick {} to {}:".format(name,action), choices=list_, carousel=True)]
         answer = inquirer.prompt(questions, theme=theme)
         if answer == None:

connpy/cli/import_export_handler.py

@@ -1,19 +1,29 @@
 import os
 import sys
-import inquirer
 from .. import printer
 from ..services.exceptions import ConnpyError
-from .forms import Forms
 
 class ImportExportHandler:
     def __init__(self, app):
         self.app = app
-        self.forms = Forms(app)
+        self._forms = None
+
+    @property
+    def forms(self):
+        if self._forms is None:
+            from .forms import Forms
+            self._forms = Forms(self.app)
+        return self._forms
+
+    @forms.setter
+    def forms(self, value):
+        self._forms = value
 
     def dispatch_import(self, args):
         file_path = args.data[0]
         try:
             printer.warning("This could overwrite your current configuration!")
+            import inquirer
             question = [inquirer.Confirm("import", message=f"Are you sure you want to import {file_path}?")]
             confirm = inquirer.prompt(question)
             if confirm == None or not confirm["import"]:

connpy/cli/node_handler.py

@@ -1,18 +1,27 @@
 import sys
 import yaml
-import inquirer
 from rich.markdown import Markdown
 
 from .. import printer
 from ..services.exceptions import ConnpyError, InvalidConfigurationError
 from .helpers import choose
-from .forms import Forms
 from .help_text import get_instructions
 
 class NodeHandler:
     def __init__(self, app):
         self.app = app
-        self.forms = Forms(app)
+        self._forms = None
+
+    @property
+    def forms(self):
+        if self._forms is None:
+            from .forms import Forms
+            self._forms = Forms(self.app)
+        return self._forms
+
+    @forms.setter
+    def forms(self, value):
+        self._forms = value
 
     def _filter_exact_match(self, matches, query):
         if not query or len(matches) <= 1:
@@ -100,6 +109,7 @@ class NodeHandler:
             sys.exit(2)
 
         printer.info(f"Removing: {matches}")
+        import inquirer
         question = [inquirer.Confirm("delete", message="Are you sure you want to continue?")]
         confirm = inquirer.prompt(question)
         if confirm == None or not confirm["delete"]:

connpy/cli/profile_handler.py

@@ -1,15 +1,24 @@
 import sys
 import yaml
-import inquirer
 
 from .. import printer
 from ..services.exceptions import ConnpyError, ProfileNotFoundError
-from .forms import Forms
 
 class ProfileHandler:
     def __init__(self, app):
         self.app = app
-        self.forms = Forms(app)
+        self._forms = None
+
+    @property
+    def forms(self):
+        if self._forms is None:
+            from .forms import Forms
+            self._forms = Forms(self.app)
+        return self._forms
+
+    @forms.setter
+    def forms(self, value):
+        self._forms = value
 
     def dispatch(self, args):
         if not self.app.case:
@@ -29,6 +38,7 @@ class ProfileHandler:
             printer.error("Can't delete default profile")
             sys.exit(6)
             
+        import inquirer
         question = [inquirer.Confirm("delete", message=f"Are you sure you want to delete {name}?")]
         confirm = inquirer.prompt(question)
         if confirm == None or not confirm["delete"]:

connpy/cli/sso_handler.py

@@ -1,6 +1,5 @@
 import sys
 import yaml
-import inquirer
 from .. import printer
 
 class SSOHandler:
@@ -40,6 +39,7 @@ class SSOHandler:
             sys.exit(1)
 
     def add_provider(self, args):
+        import inquirer
         provider = args.provider
         sso = self.app.config.config.get("sso", {})
         providers = sso.setdefault("providers", {})
@@ -113,6 +113,7 @@ class SSOHandler:
             sys.exit(1)
             
         # Confirm delete
+        import inquirer
         questions = [inquirer.Confirm("confirm", message=f"Are you sure you want to delete SSO Provider '{provider}'?", default=False)]
         answers = inquirer.prompt(questions)
         if not answers or not answers["confirm"]:

connpy/cli/validators.py

@@ -1,6 +1,9 @@
 import re
 import ast
-import inquirer
+
+def _raise_val_err(reason):
+    import inquirer
+    raise inquirer.errors.ValidationError("", reason=reason)
 
 class Validators:
     def __init__(self, app):
@@ -8,61 +11,61 @@ class Validators:
 
     def host_validation(self, answers, current, regex = "^.+$"):
         if not re.match(regex, current):
-            raise inquirer.errors.ValidationError("", reason="Host cannot be empty")
+            _raise_val_err("Host cannot be empty")
         if current.startswith("@"):
             if current[1:] not in self.app.profiles:
-                raise inquirer.errors.ValidationError("", reason="Profile {} don't exist".format(current))
+                _raise_val_err("Profile {} don't exist".format(current))
         return True
 
     def profile_protocol_validation(self, answers, current, regex = "(^ssh$|^telnet$|^kubectl$|^docker$|^ssm$|^$)"):
         if not re.match(regex, current):
-            raise inquirer.errors.ValidationError("", reason="Pick between ssh, telnet, kubectl, docker, ssm or leave empty")
+            _raise_val_err("Pick between ssh, telnet, kubectl, docker, ssm or leave empty")
         return True
 
     def protocol_validation(self, answers, current, regex = "(^ssh$|^telnet$|^kubectl$|^docker$|^ssm$|^$|^@.+$)"):
         if not re.match(regex, current):
-            raise inquirer.errors.ValidationError("", reason="Pick between ssh, telnet, kubectl, docker, ssm, leave empty or @profile")
+            _raise_val_err("Pick between ssh, telnet, kubectl, docker, ssm, leave empty or @profile")
         if current.startswith("@"):
             if current[1:] not in self.app.profiles:
-                raise inquirer.errors.ValidationError("", reason="Profile {} don't exist".format(current))
+                _raise_val_err("Profile {} don't exist".format(current))
         return True
 
     def profile_port_validation(self, answers, current, regex = "(^[0-9]*$)"):
         if not re.match(regex, current):
-            raise inquirer.errors.ValidationError("", reason="Pick a port between 1-65535, @profile o leave empty")
+            _raise_val_err("Pick a port between 1-65535, @profile o leave empty")
         try:
             port = int(current)
         except ValueError:
             port = 0
         if current != "" and not 1 <= int(port) <= 65535:
-            raise inquirer.errors.ValidationError("", reason="Pick a port between 1-65535 or leave empty")
+            _raise_val_err("Pick a port between 1-65535 or leave empty")
         return True
 
     def port_validation(self, answers, current, regex = "(^[0-9]*$|^@.+$)"):
         if not re.match(regex, current):
-            raise inquirer.errors.ValidationError("", reason="Pick a port between 1-65535, @profile or leave empty")
+            _raise_val_err("Pick a port between 1-65535, @profile or leave empty")
         try:
             port = int(current)
         except ValueError:
             port = 0
         if current.startswith("@"):
             if current[1:] not in self.app.profiles:
-                raise inquirer.errors.ValidationError("", reason="Profile {} don't exist".format(current))
+                _raise_val_err("Profile {} don't exist".format(current))
         elif current != "" and not 1 <= int(port) <= 65535:
-            raise inquirer.errors.ValidationError("", reason="Pick a port between 1-65535, @profile o leave empty")
+            _raise_val_err("Pick a port between 1-65535, @profile o leave empty")
         return True
 
     def pass_validation(self, answers, current, regex = "(^@.+$)"):
         profiles = current.split(",")
         for i in profiles:
             if not re.match(regex, i) or i[1:] not in self.app.profiles:
-                raise inquirer.errors.ValidationError("", reason="Profile {} don't exist".format(i))
+                _raise_val_err("Profile {} don't exist".format(i))
         return True
 
     def tags_validation(self, answers, current):
         if current.startswith("@"):
             if current[1:] not in self.app.profiles:
-                raise inquirer.errors.ValidationError("", reason="Profile {} don't exist".format(current))
+                _raise_val_err("Profile {} don't exist".format(current))
         elif current != "":
             isdict = False
             try:
@@ -70,7 +73,7 @@ class Validators:
             except Exception:
                 pass
             if not isinstance (isdict, dict):
-                raise inquirer.errors.ValidationError("", reason="Tags should be a python dictionary.".format(current))
+                _raise_val_err("Tags should be a python dictionary.".format(current))
         return True
 
     def profile_tags_validation(self, answers, current):
@@ -81,36 +84,36 @@ class Validators:
             except Exception:
                 pass
             if not isinstance (isdict, dict):
-                raise inquirer.errors.ValidationError("", reason="Tags should be a python dictionary.".format(current))
+                _raise_val_err("Tags should be a python dictionary.".format(current))
         return True
 
     def jumphost_validation(self, answers, current):
         if current.startswith("@"):
             if current[1:] not in self.app.profiles:
-                raise inquirer.errors.ValidationError("", reason="Profile {} don't exist".format(current))
+                _raise_val_err("Profile {} don't exist".format(current))
         elif current != "":
             if current not in self.app.nodes_list:
-                raise inquirer.errors.ValidationError("", reason="Node {} don't exist.".format(current))
+                _raise_val_err("Node {} don't exist.".format(current))
         return True
 
     def profile_jumphost_validation(self, answers, current):
         if current != "":
             if current not in self.app.nodes_list:
-                raise inquirer.errors.ValidationError("", reason="Node {} don't exist.".format(current))
+                _raise_val_err("Node {} don't exist.".format(current))
         return True
 
     def default_validation(self, answers, current):
         if current.startswith("@"):
             if current[1:] not in self.app.profiles:
-                raise inquirer.errors.ValidationError("", reason="Profile {} don't exist".format(current))
+                _raise_val_err("Profile {} don't exist".format(current))
         return True
 
     def bulk_node_validation(self, answers, current, regex = "^[0-9a-zA-Z_.,$#-]+$"):
         if not re.match(regex, current):
-            raise inquirer.errors.ValidationError("", reason="Host cannot be empty")
+            _raise_val_err("Host cannot be empty")
         if current.startswith("@"):
             if current[1:] not in self.app.profiles:
-                raise inquirer.errors.ValidationError("", reason="Profile {} don't exist".format(current))
+                _raise_val_err("Profile {} don't exist".format(current))
         return True
 
     def bulk_folder_validation(self, answers, current):
@@ -123,17 +126,17 @@ class Validators:
             
         matches = list(filter(lambda k: k == candidate, self.app.folders))
         if current != "" and len(matches) == 0:
-            raise inquirer.errors.ValidationError("", reason="Location {} don't exist".format(current))
+            _raise_val_err("Location {} don't exist".format(current))
         return True
 
     def bulk_host_validation(self, answers, current, regex = "^.+$"):
         if not re.match(regex, current):
-            raise inquirer.errors.ValidationError("", reason="Host cannot be empty")
+            _raise_val_err("Host cannot be empty")
         if current.startswith("@"):
             if current[1:] not in self.app.profiles:
-                raise inquirer.errors.ValidationError("", reason="Profile {} don't exist".format(current))
+                _raise_val_err("Profile {} don't exist".format(current))
         hosts = current.split(",")
         nodes = answers["ids"].split(",")
         if len(hosts) > 1 and len(hosts) != len(nodes):
-                raise inquirer.errors.ValidationError("", reason="Hosts list should be the same length of nodes list")
+                _raise_val_err("Hosts list should be the same length of nodes list")
         return True

connpy/connapp.py

@@ -13,12 +13,7 @@ from .api import start_api,stop_api,debug_api
 from .ai import ai
 
 from .plugins import Plugins
-from .services import (
+from .services.exceptions import ConnpyError, ProfileNotFoundError, ReservedNameError
-    NodeService, ProfileService, ConfigService, 
-    PluginService, AIService, SystemService,
-    ExecutionService, ImportExportService, ConnpyError,
-    ProfileNotFoundError, ReservedNameError
-)
 
 from rich_argparse import RichHelpFormatter
 # Bridge rich-argparse with our design system

connpy/services/__init__.py

@@ -1,12 +1,27 @@
 from .exceptions import *
 from .node_service import NodeService
 from .profile_service import ProfileService
-from .execution_service import ExecutionService
-from .import_export_service import ImportExportService
 from .ai_service import AIService
 from .plugin_service import PluginService
 from .config_service import ConfigService
-from .system_service import SystemService
+
+def __getattr__(name: str):
+    if name == "ExecutionService":
+        from .execution_service import ExecutionService
+        return ExecutionService
+    elif name == "ImportExportService":
+        from .import_export_service import ImportExportService
+        return ImportExportService
+    elif name == "SystemService":
+        from .system_service import SystemService
+        return SystemService
+    elif name == "SyncService":
+        from .sync_service import SyncService
+        return SyncService
+    elif name == "UserService":
+        from .user_service import UserService
+        return UserService
+    raise AttributeError(f"module '{__name__}' has no attribute '{name}'")
 
 __all__ = [
     'NodeService',
@@ -17,6 +32,8 @@ __all__ = [
     'PluginService',
     'ConfigService',
     'SystemService',
+    'SyncService',
+    'UserService',
     'ConnpyError',
     'NodeNotFoundError',
     'NodeAlreadyExistsError',

connpy/services/provider.py

@@ -14,6 +14,11 @@ class ServiceProvider:
         self.mode = mode
         self.config = config
         self.remote_host = remote_host
+        self._system = None
+        self._execution = None
+        self._import_export = None
+        self._sync = None
+        self._users = None
         
         if mode == "local":
             self._init_local()
@@ -28,34 +33,21 @@ class ServiceProvider:
         from .config_service import ConfigService
         from .plugin_service import PluginService
         from .ai_service import AIService
-        from .system_service import SystemService
-        from .execution_service import ExecutionService
-        from .import_export_service import ImportExportService
         from .context_service import ContextService
-        from .sync_service import SyncService
-        from .user_service import UserService
         
         self.nodes = NodeService(self.config)
         self.profiles = ProfileService(self.config)
         self.config_svc = ConfigService(self.config)
         self.plugins = PluginService(self.config)
         self.ai = AIService(self.config)
-        self.system = SystemService(self.config)
-        self.execution = ExecutionService(self.config)
-        self.import_export = ImportExportService(self.config)
         self.context = ContextService(self.config)
-        self.sync = SyncService(self.config)
-        self.users = UserService(self.config.defaultdir)
     
     def _init_remote(self):
         # Allow ConfigService to work locally so the user can revert the mode
         from .config_service import ConfigService
         from .context_service import ContextService
-        from .sync_service import SyncService
         self.config_svc = ConfigService(self.config)
         self.context = ContextService(self.config)
-        self.sync = SyncService(self.config)
-        self.users = None
         
         if not self.remote_host:
             raise InvalidConfigurationError("Remote host must be specified in remote mode")
@@ -98,3 +90,58 @@ class ServiceProvider:
         self.execution = ExecutionStub(channel, remote_host=self.remote_host)
         self.import_export = ImportExportStub(channel, remote_host=self.remote_host)
         self.auth = AuthStub(channel, remote_host=self.remote_host)
+
+    @property
+    def system(self):
+        if self._system is None and self.mode == "local":
+            from .system_service import SystemService
+            self._system = SystemService(self.config)
+        return self._system
+
+    @system.setter
+    def system(self, value):
+        self._system = value
+
+    @property
+    def execution(self):
+        if self._execution is None and self.mode == "local":
+            from .execution_service import ExecutionService
+            self._execution = ExecutionService(self.config)
+        return self._execution
+
+    @execution.setter
+    def execution(self, value):
+        self._execution = value
+
+    @property
+    def import_export(self):
+        if self._import_export is None and self.mode == "local":
+            from .import_export_service import ImportExportService
+            self._import_export = ImportExportService(self.config)
+        return self._import_export
+
+    @import_export.setter
+    def import_export(self, value):
+        self._import_export = value
+
+    @property
+    def sync(self):
+        if self._sync is None:
+            from .sync_service import SyncService
+            self._sync = SyncService(self.config)
+        return self._sync
+
+    @sync.setter
+    def sync(self, value):
+        self._sync = value
+
+    @property
+    def users(self):
+        if self._users is None and self.mode == "local":
+            from .user_service import UserService
+            self._users = UserService(self.config.defaultdir)
+        return self._users
+
+    @users.setter
+    def users(self, value):
+        self._users = value

connpy/services/sync_service.py

@@ -1,3 +1,4 @@
+import sys
 import os
 import time
 import zipfile
@@ -6,13 +7,46 @@ import io
 import yaml
 import threading
 from datetime import datetime
-from google.oauth2.credentials import Credentials
+
-from google.auth.transport.requests import Request
+def __getattr__(name: str):
-from googleapiclient.discovery import build
+    if name == "Credentials":
-from google.auth.exceptions import RefreshError
+        from google.oauth2.credentials import Credentials
-from google_auth_oauthlib.flow import InstalledAppFlow
+        return Credentials
-from googleapiclient.http import MediaFileUpload, MediaIoBaseDownload
+    elif name == "Request":
-from googleapiclient.errors import HttpError
+        from google.auth.transport.requests import Request
+        return Request
+    elif name == "build":
+        from googleapiclient.discovery import build
+        return build
+    elif name == "RefreshError":
+        from google.auth.exceptions import RefreshError
+        return RefreshError
+    elif name == "InstalledAppFlow":
+        from google_auth_oauthlib.flow import InstalledAppFlow
+        return InstalledAppFlow
+    elif name == "MediaFileUpload":
+        from googleapiclient.http import MediaFileUpload
+        return MediaFileUpload
+    elif name == "MediaIoBaseDownload":
+        from googleapiclient.http import MediaIoBaseDownload
+        return MediaIoBaseDownload
+    elif name == "HttpError":
+        from googleapiclient.errors import HttpError
+        return HttpError
+    raise AttributeError(f"module '{__name__}' has no attribute '{name}'")
+
+def _get_google_libs():
+    mod = sys.modules[__name__]
+    return (
+        getattr(mod, "Credentials"),
+        getattr(mod, "Request"),
+        getattr(mod, "build"),
+        getattr(mod, "RefreshError"),
+        getattr(mod, "InstalledAppFlow"),
+        getattr(mod, "MediaFileUpload"),
+        getattr(mod, "MediaIoBaseDownload"),
+        getattr(mod, "HttpError"),
+    )
 
 from .base import BaseService
 from .. import printer
@@ -44,6 +78,7 @@ class SyncService(BaseService):
 
     def login(self):
         """Authenticate with Google Drive."""
+        Credentials, Request, _, RefreshError, InstalledAppFlow, _, _, _ = _get_google_libs()
         creds = None
         if os.path.exists(self.token_file):
             creds = Credentials.from_authorized_user_file(self.token_file, self.scopes)
@@ -81,6 +116,7 @@ class SyncService(BaseService):
 
     def get_credentials(self):
         """Get valid credentials, refreshing if necessary."""
+        Credentials, Request, _, RefreshError, _, _, _, _ = _get_google_libs()
         if os.path.exists(self.token_file):
             creds = Credentials.from_authorized_user_file(self.token_file, self.scopes)
         else:
@@ -98,6 +134,7 @@ class SyncService(BaseService):
 
     def check_login_status(self):
         """Check if logged in to Google Drive."""
+        Credentials, Request, _, RefreshError, _, _, _, _ = _get_google_libs()
         if os.path.exists(self.token_file):
             creds = Credentials.from_authorized_user_file(self.token_file)
             if creds and creds.expired and creds.refresh_token:
@@ -110,6 +147,7 @@ class SyncService(BaseService):
 
     def list_backups(self):
         """List files in Google Drive appDataFolder."""
+        _, _, build, _, _, _, _, HttpError = _get_google_libs()
         creds = self.get_credentials()
         if not creds:
             printer.error("Not logged in to Google Drive.")
@@ -168,6 +206,7 @@ class SyncService(BaseService):
 
     def upload_file(self, file_path, timestamp):
         """Internal method to upload to Drive."""
+        _, _, build, _, _, MediaFileUpload, _, _ = _get_google_libs()
         creds = self.get_credentials()
         if not creds: return False
         
@@ -193,6 +232,7 @@ class SyncService(BaseService):
 
     def delete_backup(self, file_id):
         """Delete a backup from Drive."""
+        _, _, build, _, _, _, _, _ = _get_google_libs()
         creds = self.get_credentials()
         if not creds: return False
         try:
@@ -226,6 +266,7 @@ class SyncService(BaseService):
 
     def download_file(self, file_id, dest):
         """Internal method to download from Drive."""
+        _, _, build, _, _, _, MediaIoBaseDownload, _ = _get_google_libs()
         creds = self.get_credentials()
         if not creds: return False
         try: