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example_external_test.go
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example_external_test.go
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package enumflag_test
import (
"fmt"
"os"
log "github.com/sirupsen/logrus"
"github.com/spf13/cobra"
"github.com/thediveo/enumflag/v2"
)
func init() {
log.SetOutput(os.Stdout)
}
func Example_external() {
// ①+② skip "define your own enum flag type" and enumeration values, as we
// already have a 3rd party one.
// ③ Map 3rd party enumeration values to their textual representations
var LoglevelIds = map[log.Level][]string{
log.TraceLevel: {"trace"},
log.DebugLevel: {"debug"},
log.InfoLevel: {"info"},
log.WarnLevel: {"warning", "warn"},
log.ErrorLevel: {"error"},
log.FatalLevel: {"fatal"},
log.PanicLevel: {"panic"},
}
// ④ Define your enum flag value and set the your logging default value.
var loglevel log.Level = log.WarnLevel
rootCmd := &cobra.Command{
Run: func(cmd *cobra.Command, _ []string) {
fmt.Printf("logging level is: %d=%q\n",
loglevel,
cmd.PersistentFlags().Lookup("log").Value.String())
},
}
// ⑤ Define the CLI flag parameters for your wrapped enum flag.
rootCmd.PersistentFlags().Var(
enumflag.New(&loglevel, "log", LoglevelIds, enumflag.EnumCaseInsensitive),
"log",
"sets logging level; can be 'trace', 'debug', 'info', 'warn', 'error', 'fatal', 'panic'")
_ = rootCmd.Execute()
rootCmd.SetArgs([]string{"--log", "debug"})
_ = rootCmd.Execute()
// Output:
// logging level is: 3="warning"
// logging level is: 5="debug"
}