niki/vendor/github.com/go-openapi/spec/debug.go

// Copyright 2015 go-swagger maintainers

//

// Licensed under the Apache License, Version 2.0 (the "License");

// you may not use this file except in compliance with the License.

// You may obtain a copy of the License at

//

//    http://www.apache.org/licenses/LICENSE-2.0

//

// Unless required by applicable law or agreed to in writing, software

// distributed under the License is distributed on an "AS IS" BASIS,

// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

// See the License for the specific language governing permissions and

// limitations under the License.

package spec

import (
	"fmt"
	"log"
	"os"
	"path"
	"runtime"
)

// Debug is true when the SWAGGER_DEBUG env var is not empty.

//

// It enables a more verbose logging of this package.

var Debug = os.Getenv("SWAGGER_DEBUG") != ""

var (

	// specLogger is a debug logger for this package

	specLogger *log.Logger
)

func init() {

	debugOptions()

}

func debugOptions() {

	specLogger = log.New(os.Stdout, "spec:", log.LstdFlags)

}

func debugLog(msg string, args ...interface{}) {

	// A private, trivial trace logger, based on go-openapi/spec/expander.go:debugLog()

	if Debug {

		_, file1, pos1, _ := runtime.Caller(1)

		specLogger.Printf("%s:%d: %s", path.Base(file1), pos1, fmt.Sprintf(msg, args...))

	}

}