lg

Documentation

Overview

lg implements a simple verbosity logger interface.

The default verbosity is 0, and can be changed by setting the environment variable GGEN_LOGGING. For example:

GGEN_LOGGING=1          : set the current verbosity to 1

logger.V(0).Printf(...) : print log, since V(0) >  GGEN_LOGGING
logger.V(1).Printf(...) : print log, since V(1) == GGEN_LOGGING
logger.V(2).Printf(...) : not print, since V(2) >  GGEN_LOGGING

User of ggen package can replace the default logger with their own implementation by implementing the Logger interface.

Index

• Variables
• type Logger
• type VerbosedLogger

Variables

var New func() Logger

Types

type Logger

type Logger interface {

	// Verbosed checks if the current verbosity level is equal or higher than the param.
	Verbosed(verbosity int) bool

	// V returns a VerbosedLogger, which only outputs log when the current verbosity level is equal or higher than the
	// log line verbosity.
	V(verbosity int) VerbosedLogger

	// GetV returns the current verbosity.
	GetV() int

	// SetV sets a new verbosity, and return the last verbosity. The new verbosity must be equal or larger than the
	// current verbosity.
	SetV(verbosity int) int
}

type VerbosedLogger

type VerbosedLogger interface {
	Print(args ...interface{})
	Printf(format string, args ...interface{})
	Println(args ...interface{})
}