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package enumflag_test
import (
"fmt"
"github.com/spf13/cobra"
"github.com/thediveo/enumflag/v2"
)
// ① Define your new enum flag type. It can be derived from enumflag.Flag,
// but it doesn't need to be as long as it satisfies constraints.Integer.
type FooMode enumflag.Flag
// ② Define the enumeration values for FooMode.
const (
Foo FooMode = iota
Bar
)
// ③ Map enumeration values to their textual representations (value
// identifiers).
var FooModeIds = map[FooMode][]string{
Foo: {"foo"},
Bar: {"bar"},
}
func Example() {
// ④ Define your enum flag value.
var foomode FooMode
rootCmd := &cobra.Command{
Run: func(cmd *cobra.Command, _ []string) {
fmt.Printf("mode is: %d=%q\n",
foomode,
cmd.PersistentFlags().Lookup("mode").Value.String())
},
}
// ⑤ Define the CLI flag parameters for your wrapped enum flag.
rootCmd.PersistentFlags().VarP(
enumflag.New(&foomode, "mode", FooModeIds, enumflag.EnumCaseInsensitive),
"mode", "m",
"foos the output; can be 'foo' or 'bar'")
// cobra's help will render the default enum value identifier...
_ = rootCmd.Help()
// parse the CLI args to set our enum flag.
rootCmd.SetArgs([]string{"--mode", "bAr"})
_ = rootCmd.Execute()
// Output:
// Usage:
// [flags]
//
// Flags:
// -m, --mode mode foos the output; can be 'foo' or 'bar' (default foo)
// mode is: 1="bar"
}
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