/
flag.go
127 lines (111 loc) · 3.41 KB
/
flag.go
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// Copyright 2019 The OpenSDS Authors.
//
// 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 config
import (
gflag "flag"
"reflect"
log "github.com/golang/glog"
)
type Flag struct {
InValue interface{}
Value interface{}
}
type FlagSet struct {
flagMap map[string]*Flag
}
type Value interface {
Set(string) error
}
func (f *FlagSet) BoolVar(p *bool, name string, defValue bool, usage string) {
inVal := new(bool)
flag := &Flag{Value: p, InValue: inVal}
gflag.BoolVar(inVal, name, defValue, usage)
f.Add(name, flag)
}
func (f *FlagSet) IntVar(p *int, name string, defValue int, usage string) {
inVal := new(int)
flag := &Flag{Value: p, InValue: inVal}
gflag.IntVar(inVal, name, defValue, usage)
f.Add(name, flag)
}
func (f *FlagSet) Int64Var(p *int64, name string, defValue int64, usage string) {
inVal := new(int64)
flag := &Flag{Value: p, InValue: inVal}
gflag.Int64Var(inVal, name, defValue, usage)
f.Add(name, flag)
}
func (f *FlagSet) UintVar(p *uint, name string, defValue uint, usage string) {
inVal := new(uint)
flag := &Flag{Value: p, InValue: inVal}
gflag.UintVar(inVal, name, defValue, usage)
f.Add(name, flag)
}
func (f *FlagSet) Uint64Var(p *uint64, name string, defValue uint64, usage string) {
inVal := new(uint64)
flag := &Flag{Value: p, InValue: inVal}
gflag.Uint64Var(inVal, name, defValue, usage)
f.Add(name, flag)
}
func (f *FlagSet) Float64Var(p *float64, name string, defValue float64, usage string) {
inVal := new(float64)
flag := &Flag{Value: p, InValue: inVal}
gflag.Float64Var(inVal, name, defValue, usage)
f.Add(name, flag)
}
func (f *FlagSet) StringVar(p *string, name string, defValue string, usage string) {
inVal := new(string)
flag := &Flag{Value: p, InValue: inVal}
gflag.StringVar(inVal, name, defValue, usage)
f.Add(name, flag)
}
func (f *FlagSet) Add(name string, flag *Flag) {
if f.flagMap == nil {
f.flagMap = make(map[string]*Flag)
}
f.flagMap[name] = flag
}
func (f *FlagSet) Parse() {
gflag.Parse()
}
func (f *FlagSet) AssignValue() {
var actual []string
gflag.CommandLine.Visit(func(flag *gflag.Flag) {
actual = append(actual, flag.Name)
})
for _, name := range actual {
if _, ok := f.flagMap[name]; !ok {
continue
}
typ := reflect.TypeOf(f.flagMap[name].InValue)
val := reflect.ValueOf(f.flagMap[name].InValue)
switch typ.Elem().Kind() {
case reflect.String:
*f.flagMap[name].Value.(*string) = val.Elem().String()
case reflect.Bool:
*f.flagMap[name].Value.(*bool) = val.Elem().Bool()
case reflect.Int:
*f.flagMap[name].Value.(*int) = int(val.Elem().Int())
case reflect.Int64:
*f.flagMap[name].Value.(*int64) = val.Elem().Int()
case reflect.Uint:
*f.flagMap[name].Value.(*uint) = uint(val.Elem().Uint())
case reflect.Uint64:
*f.flagMap[name].Value.(*uint64) = val.Elem().Uint()
case reflect.Float64:
*f.flagMap[name].Value.(*float64) = val.Elem().Float()
default:
log.Error("Flag do not support this type.")
}
}
}