log

func GetDefaultLogger ¶

func GetDefaultLogger() *log.Logger

GetDefaultLogger: returns the default logger instance, initializing it if necessary. The default logger uses:

• os.Stderr for output
• RFC3339 timestamp format
• Caller reporting enabled
• TextFormatter by default, or JSONFormatter if LOG_FORMAT=json env var is set

You can use this to get the default logger and add fields before injecting:

logger := logmodule.GetDefaultLogger().With("app", "myapp")
logmodule.InjectLogger(L, logger)

func InjectLogger ¶

func InjectLogger(L *lua.LState, logger *log.Logger)

InjectLogger: injects a pre-configured logger instance into the Lua state. This is OPTIONAL - if you don't inject a logger, a default one will be created automatically. Use this only when you want to add pre-set fields (like request ID, user ID, etc.) from Go.

Example usage:

// Get default logger and add fields
logger := logmodule.GetDefaultLogger().With("request_id", "abc123", "user", "john")
logmodule.InjectLogger(L, logger)

Or create a custom logger:

logger := logmodule.NewLogger(os.Stderr, true, time.RFC3339, log.TextFormatter)
logger = logger.With("app", "myapp", "version", "1.0.0")
logmodule.InjectLogger(L, logger)

func Loader ¶

func Loader(L *lua.LState) int

Loader: creates and returns the log module for Lua. This function should be registered with L.PreloadModule("log", log.Loader)

@luamodule log

Example usage in Lua:

local log = require("log")
log.info("Application started")
log.warn("Low memory warning")
log.error("Failed to connect to database")

-- Or get a logger object
local logger = log.logger()
logger:info("Using logger object")
local contextLogger = logger:with("request_id", "abc123")
contextLogger:info("Request processing")