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 15package analysis 16 17import ( 18 "fmt" 19 "log" 20 "os" 21 "path/filepath" 22 "runtime" 23) 24 25var ( 26 // Debug is true when the SWAGGER_DEBUG env var is not empty. 27 // It enables a more verbose logging of the spec analyzer. 28 Debug = os.Getenv("SWAGGER_DEBUG") != "" 29 // analysisLogger is a debug logger for this package 30 analysisLogger *log.Logger 31) 32 33func init() { 34 debugOptions() 35} 36 37func debugOptions() { 38 analysisLogger = log.New(os.Stdout, "analysis:", log.LstdFlags) 39} 40 41func debugLog(msg string, args ...interface{}) { 42 // A private, trivial trace logger, based on go-openapi/spec/expander.go:debugLog() 43 if Debug { 44 _, file1, pos1, _ := runtime.Caller(1) 45 analysisLogger.Printf("%s:%d: %s", filepath.Base(file1), pos1, fmt.Sprintf(msg, args...)) 46 } 47} 48