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regFlags.go
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regFlags.go
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// Copyright 2017-present Kirill Danshin and Gramework contributors
// Copyright 2019-present Highload LTD (UK CN: 11893420)
//
// 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
//
package gramework
import (
"flag"
)
var flagsDisabled = false
var flagsToRegister = []Flag{
{
Name: "bind",
Description: "address to listen",
Default: ":80",
},
}
// AddFlag adds a Flag to flag queue that will be
// parsed if flags wasn't parsed yet
func (app *App) AddFlag(f Flag) {
if app.flagsQueue == nil {
app.flagsQueue = make([]Flag, 0)
}
app.flagsQueue = append(app.flagsQueue, f)
}
// RegFlags registers current flag queue in flag parser
func (app *App) RegFlags() {
if app.Flags.values == nil {
app.Flags.values = make(map[string]Flag)
}
app.flagsRegistered = true
for _, v := range app.flagsQueue {
app.Flags.values[v.Name] = Flag{
Name: v.Name,
Description: v.Description,
Default: v.Default,
Value: flag.String(v.Name, v.Default, v.Description),
}
}
}
// GetStringFlag return command line app flag value by name and false if not exists
func (app *App) GetStringFlag(name string) (string, bool) {
if !flag.Parsed() && !flagsDisabled {
flag.Parse()
}
if app.Flags.values != nil {
if bindFlag, ok := app.Flags.values[name]; ok {
return *bindFlag.Value, ok
}
}
return "", false
}
// DisableFlags globally disables default flags.
// Useful when using non-default flag libraries like pflag.
func DisableFlags() {
flagsDisabled = true
flagsToRegister = []Flag{}
}