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flags.go
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flags.go
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// Copyright 2022 The searKing Author. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package pflag
import (
goflag "flag"
"fmt"
"strings"
"github.com/spf13/pflag"
)
var underscoreWarnings = make(map[string]bool)
// WordSepNormalizeFunc changes all flags that contain "_" separators
func WordSepNormalizeFunc(f *pflag.FlagSet, name string) pflag.NormalizedName {
if strings.Contains(name, "_") {
return pflag.NormalizedName(strings.Replace(name, "_", "-", -1))
}
return pflag.NormalizedName(name)
}
// WarnWordSepNormalizeFunc changes and warns for flags that contain "_" separators
func WarnWordSepNormalizeFunc(f *pflag.FlagSet, name string) pflag.NormalizedName {
if strings.Contains(name, "_") {
nname := strings.Replace(name, "_", "-", -1)
if _, alreadyWarned := underscoreWarnings[name]; !alreadyWarned {
fmt.Printf("using an underscore in a flag name is not supported. %s has been converted to %s.", name, nname)
underscoreWarnings[name] = true
}
return pflag.NormalizedName(nname)
}
return pflag.NormalizedName(name)
}
// InitFlags normalizes, parses, then logs the command line flags
func InitFlags() {
pflag.CommandLine.SetNormalizeFunc(WordSepNormalizeFunc)
pflag.CommandLine.AddGoFlagSet(goflag.CommandLine)
pflag.Parse()
pflag.VisitAll(func(flag *pflag.Flag) {
fmt.Printf("FLAG: --%s=%q", flag.Name, flag.Value)
})
}
// PrintFlags logs the flags in the flagset
func PrintFlags(flags *pflag.FlagSet) {
flags.VisitAll(func(flag *pflag.Flag) {
fmt.Printf("FLAG: --%s=%q\n", flag.Name, flag.Value)
})
}