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This PR adds the --enable-chrome-logs argument when starting chromedriver. This allows it to inherit the i/o streams from the browser process. Without this, we have no way to suppress or redirect browser i/o streams, which results in unwanted logging going to the user's console.
🔧 Implementation Notes
I added this to the chrome Service class rather than the chromium Service class because I am not sure if this is also supported by Edge, or is only relevant to Chrome.
💡 Additional Considerations
We should test to make sure this doesn't screw up any other logging features.
🔄 Types of changes
Bug fix (backwards compatible)
PR Type
Bug fix
Description
Add --enable-chrome-logs flag to Chrome service arguments
Enable browser I/O stream inheritance to suppress unwanted console logging
Override command_line_args method in Chrome service class
Diagram Walkthrough
flowchart LR
A["Chrome Service"] --> B["command_line_args method"]
B --> C["--enable-chrome-logs flag"]
C --> D["Browser I/O streams inherited"]
D --> E["Suppressed console logging"]
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File Walkthrough
Relevant files
Bug fix
service.py
Add Chrome logs flag to service arguments
py/selenium/webdriver/chrome/service.py
Override command_line_args method to include --enable-chrome-logs flag
Add flag before port and service args in command line arguments
Enable browser I/O stream inheritance for Chrome driver
Adding '--enable-chrome-logs' unconditionally changes default behavior and may affect users relying on previous ChromeDriver/Chrome logging behavior; verify that this flag exists across supported Chrome/Driver versions and does not regress logging/CI stderr handling.
Ensure that placing '--enable-chrome-logs' before port and appending user-provided service args does not lead to duplicate or conflicting flags (e.g., user also passing '--enable-chrome-logs' or a different '--port'); consider de-duping or precedence rules.
Place the port argument after user-specified service_args to avoid being overridden by a user-provided --port in _service_args. Also, guard against None to prevent a TypeError when no service args are provided.
def command_line_args(self) -> list[str]:
- return ["--enable-chrome-logs", f"--port={self.port}"] + self._service_args+ args = ["--enable-chrome-logs"]+ user_args = self._service_args or []+ # Ensure driver-required port comes last to take precedence+ args.extend(user_args)+ args.append(f"--port={self.port}")+ return args
Apply / Chat
Suggestion importance[1-10]: 9
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Why: The suggestion correctly identifies a critical issue where a user-provided --port in service_args could override the port managed by the service, leading to connection failures. Moving the port argument to the end ensures its precedence.
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User description
🔗 Related Issues
implements #16201 for Python
fixes #16117
fixes #13095
💥 What does this PR do?
This PR adds the
--enable-chrome-logsargument when starting chromedriver. This allows it to inherit the i/o streams from the browser process. Without this, we have no way to suppress or redirect browser i/o streams, which results in unwanted logging going to the user's console.🔧 Implementation Notes
I added this to the chrome Service class rather than the chromium Service class because I am not sure if this is also supported by Edge, or is only relevant to Chrome.
💡 Additional Considerations
We should test to make sure this doesn't screw up any other logging features.
🔄 Types of changes
PR Type
Bug fix
Description
Add
--enable-chrome-logsflag to Chrome service argumentsEnable browser I/O stream inheritance to suppress unwanted console logging
Override
command_line_argsmethod in Chrome service classDiagram Walkthrough
File Walkthrough
service.py
Add Chrome logs flag to service argumentspy/selenium/webdriver/chrome/service.py
command_line_argsmethod to include--enable-chrome-logsflag