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URL: http://github.com/python-lsp/python-lsp-ruff/pull/108/files

github.githubassets.com/assets/primer-primitives-ef1311e26457f1ec.css" /> Prevent showing cmd on Windows and add handling for ruff execution with `pythonw` by dalthviz · Pull Request #108 · python-lsp/python-lsp-ruff · GitHub
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Prevent showing cmd on Windows and add handling for ruff execution with pythonw #108

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Merged
jhossbach merged 2 commits into from
Sep 29, 2025
Merged

Prevent showing cmd on Windows and add handling for ruff execution with pythonw #108

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5c84958
Prevent showing cmd on Windows and add handling for ruff execution wi…
dalthviz Sep 25, 2025
4968caa
Handle CREATE_NO_WINDOW subprocess flag value (only available on Wind…
dalthviz Sep 25, 2025
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2 changes: 2 additions & 0 deletions .gitignore
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Original file line number Diff line number Diff line change
Expand Up @@ -4,3 +4,5 @@ __pycache__/
*.swp
tags
/build/

.spyproject/
11 changes: 9 additions & 2 deletions pylsp_ruff/plugin.py
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Original file line number Diff line number Diff line change
Expand Up @@ -10,6 +10,13 @@
from subprocess import PIPE, Popen
from typing import Dict, Generator, List, Optional

if sys.platform == "win32":
from subprocess import CREATE_NO_WINDOW
else:
# CREATE_NO_WINDOW flag only available on Windows.
# Set constant as default `Popen` `creationflag` kwarg value (`0`)
CREATE_NO_WINDOW = 0

if sys.version_info >= (3, 11):
import tomllib
else:
Expand Down Expand Up @@ -502,7 +509,7 @@ def find_executable(executable) -> List[str]:
# try the python module
if cmd is None:
if importlib.util.find_spec("ruff") is not None:
cmd = [sys.executable, "-m", "ruff"]
cmd = [sys.executable.replace("pythonw", "python"), "-m", "ruff"]

# try system's ruff executable
if cmd is None:
Expand Down Expand Up @@ -557,7 +564,7 @@ def run_ruff(
cmd = [*find_executable(executable), str(subcommand), *arguments]

log.debug(f"Calling {cmd} on '{document_path}'")
p = Popen(cmd, stdin=PIPE, stdout=PIPE)
p = Popen(cmd, stdin=PIPE, stdout=PIPE, creationflags=CREATE_NO_WINDOW)
(stdout, _) = p.communicate(document_source.encode())

if p.returncode != 0:
Expand Down
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