github.com/afking/bazel-gazelle@v0.0.0-20180301150245-c02bc0f529e8/cmd/gazelle/flags.go (about) 1 // Copyright 2017 The Bazel Authors. All rights reserved. 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 main 16 17 import "fmt" 18 19 // multiFlag allows repeated string flags to be collected into a slice 20 type multiFlag []string 21 22 func (m *multiFlag) String() string { 23 if len(*m) == 0 { 24 return "" 25 } 26 return fmt.Sprint(*m) 27 } 28 29 func (m *multiFlag) Set(v string) error { 30 (*m) = append(*m, v) 31 return nil 32 } 33 34 // explicitFlag is a string flag that tracks whether it was set. 35 type explicitFlag struct { 36 set bool 37 value string 38 } 39 40 func (f *explicitFlag) Set(value string) error { 41 f.set = true 42 f.value = value 43 return nil 44 } 45 46 func (f *explicitFlag) String() string { 47 if f == nil { 48 return "" 49 } 50 return f.value 51 }