1 // Copyright 2015 go-swagger maintainers 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 package debug 16 17 import ( 18 "fmt" 19 "log" 20 "os" 21 "path/filepath" 22 "runtime" 23 ) 24 25 var ( 26 output = os.Stdout 27 ) 28 29 // GetLogger provides a prefix debug logger 30 func GetLogger(prefix string, debug bool) func(string, ...interface{}) { 31 if debug { 32 logger := log.New(output, prefix+":", log.LstdFlags) 33 34 return func(msg string, args ...interface{}) { 35 _, file1, pos1, _ := runtime.Caller(1) 36 logger.Printf("%s:%d: %s", filepath.Base(file1), pos1, fmt.Sprintf(msg, args...)) 37 } 38 } 39 40 return func(_ string, _ ...interface{}) {} 41 } 42