Values from a function return

[abdennour]

Checklist

• Are you running the latest v2 release? The list of releases is here.
• Did you check the manual for your release? The v2 manual is here
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What problem does this solve?

Sometimes, Global flag ( used by all subocommands) requires dynamic initialization. Thus, literal default values, values from env vars, values from file content or even values from alt src will not work.
If this dynamic initialization does not done in a one place, it will lead to repeating ourselves then not complying with DRY.

Solution description

  		Name:    "myflag",
		Value:   "hello",
                ValueFromFunc: () string {
                       // read value set by user ( if any)
                     //.. do something
                    // return a-string
                }

Describe alternatives you've considered

For now, i am just repeating myself everywhere

[dearchap]

@abdennour Cant you use a Before func for the command to do the Global Initialization for all the subcommands. The App/Command/Subcommand all have Before funcs, so you can do multi level initialization depending on your needs