Parse arguments into struct

[wesleimp]

Checklist

• [x] Are you running the latest v2 release? The list of releases is here.
• [x] Did you check the manual for your release? The v2 manual is here
• [x] Did you perform a search about this feature? Here's the Github guide about searching.

What problem does this solve?

Parse arguments into struct instead of get one by one

Solution description

Implement a Parse function to parse all arguments received into struct.

type Config struct {
	Port         int  `env:"PORT" envDefault:"3000"`
	IsProduction bool `env:"PRODUCTION"`
}

func run(c *cli.Context) {
	cfg := Config{}

	err := c.Parse(&cfg)
        if err != nil{
		fmt.Printf("%+v\n", err)
	}

	fmt.Printf("%+v\n", cfg)
}

[stale[bot]]

This issue or PR has been automatically marked as stale because it has not had recent activity. Please add a comment bumping this if you're still interested in it's resolution! Thanks for your help, please let us know if you need anything else.

[stale[bot]]

Closing this as it has become stale.

[dearchap]

I like this feature. Would make user code much easier to handle.

[meatballhat]

ftr some prior work exists that is compatible with urfave/cli v1: https://github.com/octago/sflags/blob/20f2a9c31dfce88b6e1ac276bfd395817089e0a0/examples/urfave_cli/main.go

[dearchap]

I think its best left to the user to handle the reflection and create the corresponding flags dynamically instead of cli library imposing the pattern