question: how to find what flags is been called in the command

[zer09]

hello good day,
still learning cobra, is there a way to find out what flags is called when a command is executed?
I tried to use the Flag.Changed field to check if the default value is changed. but what if bool type of flags and have a default value of true. calling Flag.Value even the flag is not set it will return true.

Example I want to use it like this.
on a version command it has 2 flags 'number' and 'builddate'.

I would like to use it like this
app version --number
then only the version number will print.
app version --builddate
then only the build date will only print.
calling both of them will show both values.

thanks.

[n10v]

Like this?

package main

import "github.com/spf13/cobra"

var number, buildDate bool // used for flags

var versionCmd = &cobra.Command{Use: "version",
	Run: func(cmd *cobra.Command, args []string) {
		if number && buildDate {
			// print number and build date
		} else if number {
			// print only number
		} else if buildDate {
			// print only builddate
		}
	}}

func init() {
	versionCmd.Flags().BoolVar(&number, "number", false, "print number")
	versionCmd.Flags().BoolVar(&buildDate, "buildDate", false, "print build date")
}

[n10v]

You can also iterate through all activated flags by versionCmd.Flags().Visit(...). More here

[zer09]

@BoGeM thank you so much, I got it working. I like the FlagSet.Visit, it was clean.

[masterxavierfox]

@zer09 Do you mind elaborating your solution with an example thanks.

[zer09]

@masterxavierfox I forgot about this, but it will just iterate all the supplied flags, then you can check the flag information https://godoc.org/github.com/spf13/pflag#Flag.

Something like this

func checkFlags(f *Flag){
  if(f.Name == "something"){
    // do Something
  }
}

func main(){
  flagset.Visit(checkFlags);
}

[dmjones]

See the solution at #453 (comment). Using Changed will indicate if the user has set the value (even if to the same value as the default).