// 设置日志输出的上下文变量
func Ctx(ctx context.Context, keys ...interface{}) *Logger
// 重定向日志输出接口
func To(writer io.Writer) *Logger
// 日志内容输出到目录
func Path(path string) *Logger
// 设置日志文件分类
func Cat(category string) *Logger
// 设置日志文件格式
func File(file string) *Logger
// 设置日志打印级别
func Level(level int) *Logger
// 设置日志打印级别(字符串)
func LevelStr(levelStr string) *Logger
// 设置文件回溯值
func Skip(skip int) *Logger
// 是否开启trace打印
func Stack(enabled bool) *Logger
// 开启trace打印并设定过滤trace的字符串
func StackWithFilter(filter string) *Logger
// 是否开启终端输出
func Stdout(enabled...bool) *Logger
// 是否输出日志头信息
func Header(enabled...bool) *Logger
// 输出日志调用行号信息
func Line(long...bool) *Logger
// 异步输出日志
func Async(enabled...bool) *Logger

package main

import (
	"context"

	"github.com/gogf/gf/v2/frame/g"
	"github.com/gogf/gf/v2/os/gfile"
)

func main() {
	ctx := context.TODO()
	path := "/tmp/glog-cat"
	g.Log().SetPath(path)
	g.Log().Stdout(false).Cat("cat1").Cat("cat2").PrintlnPrint(ctx, "test")
	list, err := gfile.ScanDir(path, "*", true)
	g.Dump(err)
	g.Dump(list)
}

package main

import (
	"context"

	"github.com/gogf/gf/v2/frame/g"
)

func main() {
	ctx := context.TODO()
	g.Log().Line().PrintlnPrint(ctx, "this is the short file name with its line number")
	g.Log().Line(true).PrintlnPrint(ctx, "lone file name with line number")
}

2019-05-23 09:22:58.141 glog_line.go:8: this is the short file name with its line number
2019-05-23 09:22:58.142 /Users/john/Workspace/Go/GOPATH/src/github.com/gogf/gf/.example/os/glog/glog_line.go:9: lone file name with line number

package main

import (
	"context"

	"github.com/gogf/gf/v2/frame/g"
)

func PrintLog(ctx context.Context, content string) {
	g.Log().Skip(1).Line().PrintlnPrint(ctx, "line number with skip:", content)
	g.Log().Line().PrintlnPrint(ctx, "line number without skip:", content)
}

func main() {
	ctx := context.TODO()
	PrintLog(ctx, "just test")
}