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- // Copyright 2015 Google Inc. All rights reserved.
- //
- // 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 log provides a universal logger for martian packages.
- package log
-
- import (
- "fmt"
- "log"
- "sync"
- )
-
- const (
- // Silent is a level that logs nothing.
- Silent int = iota
- // Error is a level that logs error logs.
- Error
- // Info is a level that logs error, and info logs.
- Info
- // Debug is a level that logs error, info, and debug logs.
- Debug
- )
-
- // Default log level is Error.
- var (
- level = Error
- lock sync.Mutex
- )
-
- // SetLevel sets the global log level.
- func SetLevel(l int) {
- lock.Lock()
- defer lock.Unlock()
-
- level = l
- }
-
- // Infof logs an info message.
- func Infof(format string, args ...interface{}) {
- lock.Lock()
- defer lock.Unlock()
-
- if level < Info {
- return
- }
-
- msg := fmt.Sprintf("INFO: %s", format)
- if len(args) > 0 {
- msg = fmt.Sprintf(msg, args...)
- }
-
- log.Println(msg)
- }
-
- // Debugf logs a debug message.
- func Debugf(format string, args ...interface{}) {
- lock.Lock()
- defer lock.Unlock()
-
- if level < Debug {
- return
- }
-
- msg := fmt.Sprintf("DEBUG: %s", format)
- if len(args) > 0 {
- msg = fmt.Sprintf(msg, args...)
- }
-
- log.Println(msg)
- }
-
- // Errorf logs an error message.
- func Errorf(format string, args ...interface{}) {
- lock.Lock()
- defer lock.Unlock()
-
- if level < Error {
- return
- }
-
- msg := fmt.Sprintf("ERROR: %s", format)
- if len(args) > 0 {
- msg = fmt.Sprintf(msg, args...)
- }
-
- log.Println(msg)
- }
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