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35 lines
781 B
Go
35 lines
781 B
Go
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// Copyright 2018 Frank Schroeder. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package properties
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import "flag"
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// MustFlag sets flags that are skipped by dst.Parse when p contains
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// the respective key for flag.Flag.Name.
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//
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// It's use is recommended with command line arguments as in:
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// flag.Parse()
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// p.MustFlag(flag.CommandLine)
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func (p *Properties) MustFlag(dst *flag.FlagSet) {
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m := make(map[string]*flag.Flag)
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dst.VisitAll(func(f *flag.Flag) {
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m[f.Name] = f
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})
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dst.Visit(func(f *flag.Flag) {
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delete(m, f.Name) // overridden
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})
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for name, f := range m {
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v, ok := p.Get(name)
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if !ok {
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continue
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}
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if err := f.Value.Set(v); err != nil {
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ErrorHandler(err)
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}
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}
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}
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