[py] Allow driver path to be set using ENV variables

[Delta456]

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Description

Allows using custom driver paths using ENV variables

Implements the functionality from the Ruby port in commit 7602371#diff-076503247734547bc24938fcc3aa2b317890093dae9376e32ac9b1e41b7037f9

Motivation and Context

As explained in #14045 the goal of this PR is to provide users with an alternative option to set the path to their own drivers if they do not want to use selenium manager

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• I have read the contributing document.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.

PS: Thanks to @Animesh-Ghosh and @aguspe for the help 🚀

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PR Type

Enhancement, Tests

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Description

• Added support for setting custom driver paths using environment variables across multiple drivers (Chrome, Firefox, Edge, IE, Safari).
• Introduced a new parameter driver_path_env_key to specify the environment variable key for driver paths.
• Implemented env_path method in the Service class to fetch driver paths from environment variables.
• Updated service path logic to prioritize environment variable paths over default paths.
• Added tests to verify the functionality of using environment variables for driver paths.

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Changes walkthrough 📝

	Relevant files
Enhancement	10 files service.py Add environment variable support for ChromeDriver path      py/selenium/webdriver/chromium/service.py Added driver_path_env_key parameter to the constructor. Set default environment variable key for ChromeDriver. +3/-0      webdriver.py Use environment variable for Chromium driver path                py/selenium/webdriver/chromium/webdriver.py Updated service path to use environment variable if available. +1/-1      service.py Implement environment variable path support in Service      py/selenium/webdriver/common/service.py Added driver_path_env_key parameter to the constructor. Implemented env_path method to fetch path from environment variable. +6/-2      service.py Add environment variable support for EdgeDriver path          py/selenium/webdriver/edge/service.py Added driver_path_env_key parameter to the constructor. Set default environment variable key for EdgeDriver. +3/-0      service.py Add environment variable support for GeckoDriver path        py/selenium/webdriver/firefox/service.py Added driver_path_env_key parameter to the constructor. Set default environment variable key for GeckoDriver. +3/-0      webdriver.py Use environment variable for Firefox driver path                  py/selenium/webdriver/firefox/webdriver.py Updated service path to use environment variable if available. +1/-1      service.py Add environment variable support for IEDriver path              py/selenium/webdriver/ie/service.py Added driver_path_env_key parameter to the constructor. Set default environment variable key for IEDriver. +4/-0      webdriver.py Use environment variable for IE driver path                            py/selenium/webdriver/ie/webdriver.py Updated service path to use environment variable if available. +1/-1      service.py Add environment variable support for SafariDriver path      py/selenium/webdriver/safari/service.py Added driver_path_env_key parameter to the constructor. Set default environment variable key for SafariDriver. +3/-0      webdriver.py Use environment variable for Safari driver path                    py/selenium/webdriver/safari/webdriver.py Updated service path to use environment variable if available. +1/-1
Tests	2 files chrome_service_tests.py Add tests for ChromeDriver path from environment variable py/test/selenium/webdriver/chrome/chrome_service_tests.py Added tests for ChromeDriver service path using environment variable. +24/-0    firefox_service_tests.py Add tests for GeckoDriver path from environment variable  py/test/selenium/webdriver/firefox/firefox_service_tests.py Added tests for GeckoDriver service path using environment variable. +25/-0

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PR Reviewer Guide 🔍

⏱️ Estimated effort to review: 3 🔵🔵🔵⚪⚪

🧪 PR contains tests

🔒 No security concerns identified

⚡ Key issues to review Potential Bug The env_path() method returns None if the environment variable is not set, which could lead to unexpected behavior if not handled properly in the calling code. Code Duplication The logic for setting the service path is duplicated across different webdriver implementations (Chrome, Firefox, IE, Safari). Consider refactoring this into a common method.

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PR Code Suggestions ✨

Category	Suggestion	Score
Best practice	Add a docstring to the env_path method for better documentation Consider adding a docstring for the env_path method to explain its purpose and return value. py/selenium/webdriver/common/service.py [241-242] def env_path(self) -> Optional[str]: + """ + Retrieve the driver path from the environment variable. + + Returns: + Optional[str]: The driver path if set in the environment, None otherwise. + """ return os.getenv(self.DRIVER_PATH_ENV_KEY, None) Apply this suggestion Suggestion importance[1-10]: 9 Why: Providing a docstring significantly improves code documentation, helping developers understand the method's purpose and return value, which is crucial for maintainability.	9
Enhancement	Add a type hint for the driver_path_env_key parameter in the constructor Consider adding a type hint for the driver_path_env_key parameter in the init method to improve code readability and maintainability. py/selenium/webdriver/common/service.py [50-58] def __init__( self, executable_path: str = None, port: int = 0, log_output: SubprocessStdAlias = None, env: typing.Optional[typing.Mapping[typing.Any, typing.Any]] = None, - driver_path_env_key: str = None, + driver_path_env_key: typing.Optional[str] = None, **kwargs, ) -> None: Apply this suggestion Suggestion importance[1-10]: 8 Why: Adding a type hint enhances code readability and maintainability, making it clear that the parameter is optional and expected to be a string.	8
	Rename the environment variable key attribute for better clarity and consistency Consider using a more descriptive name for the environment variable key attribute. Instead of DRIVER_PATH_ENV_KEY, a name like driver_path_env_var might be clearer and more consistent with Python naming conventions. py/selenium/webdriver/common/service.py [73] -self.DRIVER_PATH_ENV_KEY = driver_path_env_key +self.driver_path_env_var = driver_path_env_key Apply this suggestion Suggestion importance[1-10]: 7 Why: The suggestion improves code readability by using a more descriptive and consistent naming convention, which is beneficial for maintainability.	7
Maintainability	Add a comment to explain the fallback mechanism for setting the service path Consider adding a comment to explain the fallback mechanism when setting the self.service.path. This will help other developers understand the logic behind using both env_path() and finder.get_driver_path(). py/selenium/webdriver/chromium/webdriver.py [54] +# Use the path from environment variable if set, otherwise use the path found by DriverFinder self.service.path = self.service.env_path() or finder.get_driver_path() Apply this suggestion Suggestion importance[1-10]: 6 Why: The comment clarifies the logic behind the fallback mechanism, aiding in code comprehension and future maintenance, though it is not critical.	6

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