github.com/gechr/complete@v0.0.0-20191016221035-401475e3ce1e/log.go (about) 1 package complete 2 3 import ( 4 "io/ioutil" 5 "log" 6 "os" 7 ) 8 9 // Log is used for debugging purposes 10 // since complete is running on tab completion, it is nice to 11 // have logs to the stderr (when writing your own completer) 12 // to write logs, set the COMP_DEBUG environment variable and 13 // use complete.Log in the complete program 14 var Log = getLogger() 15 16 func getLogger() func(format string, args ...interface{}) { 17 var logfile = ioutil.Discard 18 if os.Getenv(envDebug) != "" { 19 logfile = os.Stderr 20 } 21 return log.New(logfile, "complete ", log.Flags()).Printf 22 }