Module config 

Logging configuration types and parsing.

This module provides configuration for the Nautilus logging subsystem via the LoggerConfig and FileWriterConfig types.

Spec String Format

The NAUTILUS_LOG environment variable uses a semicolon-separated format:

stdout=Info;fileout=Debug;RiskEngine=Error;my_crate::module=Debug;is_colored

Supported Keys

Key	Type	Description
stdout	Log level	Maximum level for stdout output.
fileout	Log level	Maximum level for file output.
is_colored	Boolean	Enable ANSI colors (default: true).
print_config	Boolean	Print config to stdout at startup.
log_components_only	Boolean	Only log components with explicit filters.
<component>	Log level	Component-specific log level (exact match).
<module::path>	Log level	Module-specific log level (prefix match).

Log Levels

Off, Error, Warn, Info, Debug, Trace (case-insensitive)

Boolean Values

• Bare flag: is_colored → true
• Explicit: is_colored=true, is_colored=false, is_colored=0, is_colored=no

Structs

LoggerConfig

Configuration for the Nautilus logger.