podman
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1// Copyright 2013-2022 Frank Schroeder. All rights reserved.
2// Use of this source code is governed by a BSD-style
3// license that can be found in the LICENSE file.
4
5package properties
6
7import "flag"
8
9// MustFlag sets flags that are skipped by dst.Parse when p contains
10// the respective key for flag.Flag.Name.
11//
12// It's use is recommended with command line arguments as in:
13//
14// flag.Parse()
15// p.MustFlag(flag.CommandLine)
16func (p *Properties) MustFlag(dst *flag.FlagSet) {
17m := make(map[string]*flag.Flag)
18dst.VisitAll(func(f *flag.Flag) {
19m[f.Name] = f
20})
21dst.Visit(func(f *flag.Flag) {
22delete(m, f.Name) // overridden
23})
24
25for name, f := range m {
26v, ok := p.Get(name)
27if !ok {
28continue
29}
30
31if err := f.Value.Set(v); err != nil {
32ErrorHandler(err)
33}
34}
35}
36