文件结构 /home/vagrant/gocode/gtail ├── go.mod ├── go.sum ├── log_watcher.go ├── main.go └── playbooks ├── file_watcher │ └── compile.json └── session.yaml
log_watcher 的内容 package log_watcher import ( "fmt" "log" "os" "path/filepath" ) type LogWatcher struct { Pattern string } func (c *LogWatcher) tail() { matches, err := filepath.Glob(c.Pattern) if err != nil { log.Fatal(err) return } for k, v := range matches { file_obj, err := os.Open(v) if err != nil { log.Fatal(err) return } go func() { buf := make([]byte, 1024) for { n, _ := file_obj.Read(buf) if 0 == n { break } fmt.Print(buf[:n]) } }() } return }
main.go 的内容 package main import ( "fmt" "log" "os" "github.com/urfave/cli" "gtail/log_watcher" ) func main() { var pattern string app := &cli.App{ Name: "gtail", Usage: "golang tail", Flags: []cli.Flag{ &cli.StringFlag{ Name: "pattern", Usage: "language for the greeting", Required: true, Destination: &pattern, }, }, Action: func(c *cli.Context) error { if len(pattern) == 0 { fmt.Printf("miss pattern\n") return nil } var log_watcher = &LogWatcher{ Pattern: pattern, } log_watcher.tail() }, } err := app.Run(os.Args) if err != nil { log.Fatal(err) } }
为什么 build 的时候提示 can't load package: package gtail: found packages log_watcher (log_watcher.go) and main (main.go) in /home/vagrant/gocode/gtail
我另一个项目这么导包又成功了,感觉 golang 的导包真的玄学,