python layer lsp mode, setting pylsp plugin vars takes no effect

[spacegoing]

I set these vars in dotspacemacs:

(defun dotspacemacs/user-config ()   
(with-eval-after-load 'lsp-mode
  (lsp-register-custom-settings
   '(("pylsp.plugins.ruff.enabled" t t)
     ("pylsp.plugins.ruff.executable" "/root/.venv/base/bin/ruff")
     ("pylsp.plugins.ruff.config" "/root/myCodeLab/GitConfig/python/.config/ruff/ruff.toml")
     ("pylsp.plugins.ruff.formatEnabled" t t)
     ("pylsp.plugins.ruff.severities" (("D212" . "I")))
)

But pylsp keeps using default settings:

2025-04-02 09:16:22,262 UTC - DEBUG - pylsp.config.config -   finish pylsp_settings --> [{'plugins': {'pylint': {'enabled': False, 'args': [], 'executable': None}}}, {'plugins': {'preload': {'modules': ['OpenGL', 'PIL', 'array', '\
audioop', 'binascii', 'cPickle', 'cStringIO', 'cmath', 'collections', 'datetime', 'errno', 'exceptions', 'gc', 'imageop', 'imp', 'itertools', 'marshal', 'math', 'matplotlib', 'mmap', 'mpmath', 'msvcrt', 'networkx', 'nose', 'nt', '\
numpy', 'operator', 'os', 'os.path', 'pandas', 'parser', 'rgbimg', 'scipy', 'signal', 'skimage', 'sklearn', 'statsmodels', 'strop', 'sympy', 'sys', 'thread', 'time', 'wx', 'xxsubtype', 'zipimport', 'zlib']}}, 'rope': {'extensionMo\
dules': ['OpenGL', 'PIL', 'array', 'audioop', 'binascii', 'cPickle', 'cStringIO', 'cmath', 'collections', 'datetime', 'errno', 'exceptions', 'gc', 'imageop', 'imp', 'itertools', 'marshal', 'math', 'matplotlib', 'mmap', 'mpmath', '\
msvcrt', 'networkx', 'nose', 'nt', 'numpy', 'operator', 'os', 'os.path', 'pandas', 'parser', 'rgbimg', 'scipy', 'signal', 'skimage', 'sklearn', 'statsmodels', 'strop', 'sympy', 'sys', 'thread', 'time', 'wx', 'xxsubtype', 'zipimpor\
t', 'zlib']}}, {'plugins': {'ruff': {'enabled': True, 'formatEnabled': True, 'executable': None, 'config': None, 'lineLength': None, 'exclude': None, 'select': None, 'extendSelect': None, 'ignore': None, 'extendIgnore': None, 'per\
FileIgnores': None, 'format': None, 'preview': False, 'unsafeFixes': False, 'severities': None, 'targetVersion': None}, 'pyflakes': {'enabled': False}, 'mccabe': {'enabled': False}, 'pycodestyle': {'enabled': False}, 'yapf': {'ena\
bled': False}, 'autopep8': {'enabled': False}}}] [hook]                                                                                                                                                                                
                                                                                                                                                                                                                                       
2025-04-02 09:16:22,262 UTC - DEBUG - pylsp.config.config - With configuration: {'rope': {'extensionModules': ['OpenGL', 'PIL', 'array', 'audioop', 'binascii', 'cPickle', 'cStringIO', 'cmath', 'collections', 'datetime', 'errno', '\
exceptions', 'gc', 'imageop', 'imp', 'itertools', 'marshal', 'math', 'matplotlib', 'mmap', 'mpmath', 'msvcrt', 'networkx', 'nose', 'nt', 'numpy', 'operator', 'os', 'os.path', 'pandas', 'parser', 'rgbimg', 'scipy', 'signal', 'skima\
ge', 'sklearn', 'statsmodels', 'strop', 'sympy', 'sys', 'thread', 'time', 'wx', 'xxsubtype', 'zipimport', 'zlib']}, 'plugins': {'ruff': {'enabled': True, 'formatEnabled': True, 'executable': None, 'config': None, 'lineLength': Non\
e, 'exclude': None, 'select': None, 'extendSelect': None, 'ignore': None, 'extendIgnore': None, 'perFileIgnores': None, 'format': None, 'preview': False, 'unsafeFixes': False, 'severities': None, 'targetVersion': None}, 'autopep8'\
: {'enabled': False}, 'pyflakes': {'enabled': False}, 'pylint': {'enabled': False, 'args': [], 'executable': None}, 'pycodestyle': {'enabled': False}, 'yapf': {'enabled': False}, 'preload': {'modules': ['OpenGL', 'PIL', 'array', '\
audioop', 'binascii', 'cPickle', 'cStringIO', 'cmath', 'collections', 'datetime', 'errno', 'exceptions', 'gc', 'imageop', 'imp', 'itertools', 'marshal', 'math', 'matplotlib', 'mmap', 'mpmath', 'msvcrt', 'networkx', 'nose', 'nt', '\
numpy', 'operator', 'os', 'os.path', 'pandas', 'parser', 'rgbimg', 'scipy', 'signal', 'skimage', 'sklearn', 'statsmodels', 'strop', 'sympy', 'sys', 'thread', 'time', 'wx', 'xxsubtype', 'zipimport', 'zlib']}, 'mccabe': {'enabled': \
False}}}         

As u can see, plugins ruff has None config

'plugins': {'ruff': {'enabled': True, 'formatEnabled': True, 'executable': None, 'config': None, 'lineLength': Non\
e, 'exclude': None, 'select': None, 'extendSelect': None, 'ignore': None, 'extendIgnore': None, 'perFileIgnores': None, 'format': None, 'preview': False, 'unsafeFixes': False, 'severities': None, 'targetVersion': None}, 

[fnussbaum]

I think you either need to use (with-eval-after-load 'lsp-pylsp ...) or set the lsp-pylsp user options such as lsp-pylsp-plugins-ruff-executable instead, see https://github.com/emacs-lsp/lsp-mode/blob/7c0df125c19536646634dca9e27ecb3705db7521/clients/lsp-pylsp.el#L370-L471.

[spacegoing]

@fnussbaum many thanks for ur reply!

I tried

  (setq lsp-pylsp-plugins-ruff-enabled t
        lsp-pylsp-plugins-ruff-executable "/root/.venv/base/bin/ruff"
        lsp-pylsp-plugins-ruff-config "/root/myCodeLab/GitConfig/python/.config/ruff/ruff.toml"
        lsp-pylsp-plugins-ruff-format-enabled t
        lsp-pylsp-plugins-ruff-severities '(("D212" . "I"))))

with / without (with-eval-after-load 'lsp-pylsp / 'lsp-mode both in user-init() user-config(), but none of those settings work. lsp-pylsp still don't read vars set above.

Any idea how to debug? Many thanks!

[smile13241324]

This sound very much like a bug in lsp-mode or an order issue. I have set a test variable to a variable using emacs customize but still got the old config.

@spacegoing can you tell me how you managed to make your pylsp server log in debug mode? Also you should ask in emacs-lsp mode project how to properly configure this server and try to reproduce your issue in vanilla emacs. If it works there then its our bug, if not its an lsp-mode bug.