fix: Set the startup environment variables

[shaohuzhang1]

fix: Set the startup environment variables

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[shaohuzhang1]

There are several areas where the code can be improved:

1. Environment Variables: It's good practice to avoid using absolute paths like settings.APPS_DIR in environment variables unless necessary. Instead, consider setting them up at deployment time through a configuration file.

2. Security: Using 'C_FORCE_ROOT' is not recommended as it bypasses security measures that prevent root execution of scripts. If running the script on a server under user permissions, ensure that the script is executed with appropriate permissions rather than forcing root mode.

3. Default Environment Setup: The use of default values for environment variables such as PYTHONOPTIMIZE and ANSIBLE_FORCE_COLOR doesn't seem relevant unless these features are explicitly needed and have been tested thoroughly.

Here's an optimized version of the code snippet:

# Import required modules
import subprocess
from .celery_base import CeleryBaseService

__all__ = ['CeleryDefaultService']

class CeleryDefaultService(CeleryBaseService):
    def __init__(self, **kwargs):
        super().__init__(**kwargs)
        self.env = {}

    def open_subprocess(self):
        # Set common environment variables
        self.set_common_environment_variables()

    def set_common_environment_variables(self):
        env_copy = os.environ.copy()
        env_copy['SERVER_NAME'] = 'celery'

        # Use relative paths instead of full paths from settings if possible
        app_directories = ','.join(settings.APP_DIRECTORIES)  # Assuming you have APP_DIRECTORIES in settings
        env_copy['PYTHONPATH'] = app_directories

        if os.getuid() != 0:
            env_copy['LC_ALL'] = 'C.UTF-8'
            env_copy['ANSIBLE_FORCE_COLOR'] = 'True'
            env_copy.setdefault('PYTHONOPTIMIZE', '1')

        return environ_copy

Key Changes:

• Use Relative Paths: Avoid hardcoded paths like settings.APPS_DIR. This makes the application more portable across different environments.
• Common Environment Setup: Extracted into a separate method (set_common_environment_variables) for better modularity and easier maintenance.
• Remove Unnecessary Checks: Removed the condition checking for root_uid since it was not used anywhere else.

Make sure to replace settings.APP_DIRECTORIES with the actual path(s) your applications require during runtime.