1 // Copyright (c) 2016 Uber Technologies, Inc. 2 // 3 // Permission is hereby granted, free of charge, to any person obtaining a copy 4 // of this software and associated documentation files (the "Software"), to deal 5 // in the Software without restriction, including without limitation the rights 6 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 7 // copies of the Software, and to permit persons to whom the Software is 8 // furnished to do so, subject to the following conditions: 9 // 10 // The above copyright notice and this permission notice shall be included in 11 // all copies or substantial portions of the Software. 12 // 13 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 14 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 15 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 16 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 17 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 18 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 19 // THE SOFTWARE. 20 21 package zap 22 23 import ( 24 "flag" 25 26 "go.uber.org/zap/zapcore" 27 ) 28 29 // LevelFlag uses the standard library's flag.Var to declare a global flag 30 // with the specified name, default, and usage guidance. The returned value is 31 // a pointer to the value of the flag. 32 // 33 // If you don't want to use the flag package's global state, you can use any 34 // non-nil *Level as a flag.Value with your own *flag.FlagSet. 35 func LevelFlag(name string, defaultLevel zapcore.Level, usage string) *zapcore.Level { 36 lvl := defaultLevel 37 flag.Var(&lvl, name, usage) 38 return &lvl 39 } 40