feat: add embedded plugins config source

Author: hlouzada

pylsp/plugins/config.py

@@ -0,0 +1,79 @@
+# Copyright 2025- Python Language Server Contributors.
+
+import os
+import sys
+
+import pycodestyle
+
+from pylsp import hookimpl
+from pylsp.config.source import ConfigSource
+
+
+class Flake8Config(ConfigSource):
+    """Parse flake8 configurations."""
+
+    CONFIG_KEY = "flake8"
+    PROJECT_CONFIGS = [".flake8", "setup.cfg", "tox.ini"]
+    USER_CONFIGS = (
+        [os.path.expanduser("~\\.flake8")]
+        if sys.platform == "win32" else [os.path.join(ConfigSource.XDG_CONFIG_HOME, "flake8")]
+    )
+
+    OPTIONS = [
+        # mccabe
+        ("max-complexity", "plugins.mccabe.threshold", int),
+        # pycodestyle
+        ("exclude", "plugins.pycodestyle.exclude", list),
+        ("filename", "plugins.pycodestyle.filename", list),
+        ("hang-closing", "plugins.pycodestyle.hangClosing", bool),
+        ("ignore", "plugins.pycodestyle.ignore", list),
+        ("max-line-length", "plugins.pycodestyle.maxLineLength", int),
+        ("indent-size", "plugins.pycodestyle.indentSize", int),
+        ("select", "plugins.pycodestyle.select", list),
+        # flake8
+        ("exclude", "plugins.flake8.exclude", list),
+        ("extend-ignore", "plugins.flake8.extendIgnore", list),
+        ("extend-select", "plugins.flake8.extendSelect", list),
+        ("filename", "plugins.flake8.filename", list),
+        ("hang-closing", "plugins.flake8.hangClosing", bool),
+        ("ignore", "plugins.flake8.ignore", list),
+        ("max-complexity", "plugins.flake8.maxComplexity", int),
+        ("max-line-length", "plugins.flake8.maxLineLength", int),
+        ("indent-size", "plugins.flake8.indentSize", int),
+        ("select", "plugins.flake8.select", list),
+        ("per-file-ignores", "plugins.flake8.perFileIgnores", list),
+    ]
+
+    @classmethod
+    def _parse_list_opt(cls, string):
+        if string.startswith("\n"):
+            return [s.strip().rstrip(",") for s in string.split("\n") if s.strip()]
+        return [s.strip() for s in string.split(",") if s.strip()]
+
+
+class PyCodeStyleConfig(ConfigSource):
+    CONFIG_KEY = "pycodestyle"
+    USER_CONFIGS = [pycodestyle.USER_CONFIG] if pycodestyle.USER_CONFIG else []
+    PROJECT_CONFIGS = ["pycodestyle.cfg", "setup.cfg", "tox.ini"]
+
+    OPTIONS = [
+        ("exclude", "plugins.pycodestyle.exclude", list),
+        ("filename", "plugins.pycodestyle.filename", list),
+        ("hang-closing", "plugins.pycodestyle.hangClosing", bool),
+        ("ignore", "plugins.pycodestyle.ignore", list),
+        ("max-line-length", "plugins.pycodestyle.maxLineLength", int),
+        ("indent-size", "plugins.pycodestyle.indentSize", int),
+        ("select", "plugins.pycodestyle.select", list),
+        ("aggressive", "plugins.pycodestyle.aggressive", int),
+    ]
+
+
+# ---- pylsp_settings hook implementation (new architecture) ----
+@hookimpl
+def pylsp_settings():  # noqa: ARG001 (config not used yet)
+    """Provide configuration source classes to the server.
+
+    The server will instantiate each returned class with the workspace root.
+    Returning classes (not instances) matches the new ServerConfig collection flow.
+    """
+    return [Flake8Config, PyCodeStyleConfig]

pyproject.toml

@@ -85,6 +85,7 @@ pylint = "pylsp.plugins.pylint_lint"
 rope_completion = "pylsp.plugins.rope_completion"
 rope_autoimport = "pylsp.plugins.rope_autoimport"
 yapf = "pylsp.plugins.yapf_format"
+config_sources = "pylsp.plugins.config"
 
 [project.scripts]
 pylsp = "pylsp.__main__:main"