mirror of
https://github.com/PrefectHQ/fastmcp.git
synced 2026-08-24 06:24:18 +02:00
Remove deprecated dependencies parameter from FastMCP constructor (#2340)
This commit is contained in:
Jeremiah Lowin
GitHub
parent
cdbe4d9a1d
commit
1c885c48e7
7 changed files with 18 additions and 102 deletions
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@ -34,15 +34,8 @@ REINFORCEMENT_FACTOR = 1.1
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DEFAULT_LLM_MODEL = "openai:gpt-4o"
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DEFAULT_EMBEDDING_MODEL = "text-embedding-3-small"
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mcp = FastMCP(
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"memory",
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dependencies=[
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"pydantic-ai-slim[openai]",
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"asyncpg",
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"numpy",
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"pgvector",
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],
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)
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# Dependencies are configured in memory.fastmcp.json
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mcp = FastMCP("memory")
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DB_DSN = "postgresql://postgres:postgres@localhost:54320/memory_db"
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# reset memory by deleting the profile directory
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@ -1,3 +1,7 @@
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# /// script
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# dependencies = ["pyautogui", "Pillow", "fastmcp"]
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# ///
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"""
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FastMCP Screenshot Example
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@ -10,7 +14,8 @@ from fastmcp import FastMCP
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from fastmcp.utilities.types import Image
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# Create server
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mcp = FastMCP("Screenshot Demo", dependencies=["pyautogui", "Pillow"])
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# Dependencies are configured in screenshot.fastmcp.json
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mcp = FastMCP("Screenshot Demo")
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@mcp.tool
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@ -1,3 +1,10 @@
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# /// script
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# dependencies = [
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# "smart_home@git+https://github.com/jlowin/fastmcp.git#subdirectory=examples/smart_home",
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# "fastmcp",
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# ]
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# ///
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from typing import Annotated, Any, Literal, TypedDict
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from phue2.exceptions import PhueException
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@ -35,12 +42,8 @@ class HueAttributes(TypedDict, total=False):
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transitiontime: NotRequired[Annotated[int, Field(description="deciseconds")]]
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lights_mcp = FastMCP(
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"Hue Lights Service (phue2)",
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dependencies=[
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"smart_home@git+https://github.com/jlowin/fastmcp.git#subdirectory=examples/smart_home",
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],
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)
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# Dependencies are configured in lights.fastmcp.json
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lights_mcp = FastMCP("Hue Lights Service (phue2)")
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@lights_mcp.tool
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@ -19,7 +19,6 @@ from rich.table import Table
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import fastmcp
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from fastmcp.cli import run as run_module
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from fastmcp.cli.install import install_app
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from fastmcp.server.server import FastMCP
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from fastmcp.utilities.cli import is_already_in_uv_subprocess, load_and_merge_config
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from fastmcp.utilities.inspect import (
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InspectFormat,
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@ -28,7 +27,6 @@ from fastmcp.utilities.inspect import (
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)
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from fastmcp.utilities.logging import get_logger
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from fastmcp.utilities.mcp_server_config import MCPServerConfig
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from fastmcp.utilities.mcp_server_config.v1.environments.uv import UVEnvironment
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logger = get_logger("cli")
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console = Console()
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@ -224,29 +222,11 @@ async def dev(
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)
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try:
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# Load server to check for deprecated dependencies
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if not config:
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logger.error("No configuration available")
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sys.exit(1)
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assert config is not None # For type checker
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server: FastMCP = await config.source.load_server()
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if server.dependencies:
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import warnings
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warnings.warn(
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f"Server '{server.name}' uses deprecated 'dependencies' parameter (deprecated in FastMCP 2.11.4). "
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"Please migrate to fastmcp.json configuration file. "
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"See https://gofastmcp.com/docs/deployment/server-configuration for details.",
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DeprecationWarning,
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stacklevel=2,
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)
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# Merge server dependencies with environment dependencies
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env_deps = config.environment.dependencies or []
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all_deps = list(set(env_deps + server.dependencies))
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if not config.environment:
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config.environment = UVEnvironment(dependencies=all_deps)
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else:
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config.environment.dependencies = all_deps
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await config.source.load_server()
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env_vars = {}
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if ui_port:
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@ -105,21 +105,6 @@ async def process_common_args(
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)
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name = file.stem
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# Get server dependencies if available
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# TODO: Remove dependencies handling (deprecated in v2.11.4)
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server_dependencies = getattr(server, "dependencies", []) if server else []
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if server_dependencies:
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import warnings
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warnings.warn(
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"Server uses deprecated 'dependencies' parameter (deprecated in FastMCP 2.11.4). "
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"Please migrate to fastmcp.json configuration file. "
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"See https://gofastmcp.com/docs/deployment/server-configuration for details.",
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DeprecationWarning,
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stacklevel=2,
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)
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with_packages = list(set(with_packages + server_dependencies))
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# Process environment variables if provided
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env_dict: dict[str, str] | None = None
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if env_file or env_vars:
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@ -3,7 +3,6 @@
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from __future__ import annotations
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import inspect
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import json
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import re
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import secrets
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import warnings
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@ -157,7 +156,6 @@ class FastMCP(Generic[LifespanResultT]):
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auth: AuthProvider | NotSetT | None = NotSet,
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middleware: Sequence[Middleware] | None = None,
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lifespan: LifespanCallable | None = None,
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dependencies: list[str] | None = None,
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resource_prefix_format: Literal["protocol", "path"] | None = None,
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mask_error_details: bool | None = None,
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tools: Sequence[Tool | Callable[..., Any]] | None = None,
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@ -258,24 +256,6 @@ class FastMCP(Generic[LifespanResultT]):
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# Set up MCP protocol handlers
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self._setup_handlers()
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# Handle dependencies with deprecation warning
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# TODO: Remove dependencies parameter (deprecated in v2.11.4)
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if dependencies is not None:
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import warnings
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warnings.warn(
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"The 'dependencies' parameter is deprecated as of FastMCP 2.11.4 and will be removed in a future version. "
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"Please specify dependencies in a fastmcp.json configuration file instead:\n"
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'{\n "entrypoint": "your_server.py",\n "environment": {\n "dependencies": '
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f"{json.dumps(dependencies)}\n }}\n}}\n"
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"See https://gofastmcp.com/docs/deployment/server-configuration for more information.",
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DeprecationWarning,
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stacklevel=2,
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)
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self.dependencies: list[str] = (
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dependencies or fastmcp.settings.server_dependencies
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) # TODO: Remove (deprecated in v2.11.4)
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self.sampling_handler: ServerSamplingHandler[LifespanResultT] | None = (
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sampling_handler
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)
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@ -1,30 +0,0 @@
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"""Tests for deprecated dependencies parameter.
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This entire file can be deleted when the dependencies parameter is removed (deprecated in v2.11.4).
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"""
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import warnings
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import pytest
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from fastmcp import FastMCP
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def test_dependencies_parameter_deprecated():
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"""Test that using the dependencies parameter raises a deprecation warning."""
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with pytest.warns(DeprecationWarning, match="deprecated as of FastMCP 2.11.4"):
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server = FastMCP("Test Server", dependencies=["pandas", "numpy"])
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# Should still work for backward compatibility
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assert server.dependencies == ["pandas", "numpy"]
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def test_no_warning_without_dependencies():
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"""Test that no warning is raised when dependencies are not used."""
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with warnings.catch_warnings():
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warnings.simplefilter("error") # Turn warnings into errors
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server = FastMCP("Test Server") # Should not raise
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assert server.dependencies == [] # Should use default empty list
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