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util.go
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util.go
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/*
* The MIT License (MIT)
* Copyright (c) 2023 Cisco and/or its affiliates. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of this software
* and associated documentation files (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all copies or substantial
* portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
* TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
package cli
import (
"strings"
"github.com/iancoleman/strcase"
"github.com/spf13/cobra"
"github.com/spf13/pflag"
"github.com/spf13/viper"
)
// BindCMDFlags binds cobra command flags with {cmd name}.{camelized flag name} format to viper
// it also binds {cmd name}- prefixed flags with similar fashion
func BindCMDFlags(v *viper.Viper, cmd *cobra.Command) {
getKey := func(cmdName, flagName string, prefixSeparator, trimSeparator string) string {
return cmdName + prefixSeparator + camelize(strings.TrimPrefix(flagName, cmdName+trimSeparator))
}
cmd.Flags().VisitAll(func(flag *pflag.Flag) {
key := getKey(cmd.Name(), flag.Name, ".", ".")
if err := v.BindPFlag(key, flag); err != nil {
return
}
if strings.HasPrefix(flag.Name, cmd.Name()+"-") {
key = getKey(cmd.Name(), flag.Name, ".", "-")
if err := v.BindPFlag(key, flag); err != nil {
return
}
}
})
cmd.PersistentFlags().VisitAll(func(flag *pflag.Flag) {
key := getKey(cmd.Name(), flag.Name, ".", ".")
if err := v.BindPFlag(key, flag); err != nil {
return
}
if strings.HasPrefix(flag.Name, cmd.Name()+"-") {
key = getKey(cmd.Name(), flag.Name, ".", "-")
if err := v.BindPFlag(key, flag); err != nil {
return
}
}
})
}
func camelize(str string) string {
parts := make([]string, 0)
for _, p := range strings.Split(str, ".") {
parts = append(parts, strcase.ToLowerCamel(p))
}
return strings.Join(parts, ".")
}