urfave/cli delegating flag handling

baz.go

//$GOPATH/src/github.com/therealplato/scratch/repro-urfave/baz.go

package baz

import (
	"flag"
	"fmt"
)

func Run() {
	filename := flag.String("c", "", "filename of the JSON-based configuration file")
	flag.Parse()
	fmt.Printf("flag was `%v`", *filename)
}

main.go

//$GOPATH/src/github.com/therealplato/scratch/repro-urfave/cmd/main.go
/*
repro-urfave/cmd Ω ./cmd bar baz -c asdf
 flag was ``%
repro-urfave/cmd Ω ./cmd bar baz -c=asdf
 flag was ``%
repro-urfave/cmd Ω ./cmd bar baz -c='asdf'
 flag was ``%
*/
package main

import (
	"os"

	baz "github.com/therealplato/scratch/repro-urfave"

	cli "gopkg.in/urfave/cli.v1"
)

var args []string

func main() {
	app := cli.NewApp()
	app.Name = "foo"
	app.Commands = []cli.Command{
		{
			Name:            "bar",
			Usage:           "initialize",
			SkipFlagParsing: true,
			Subcommands: []cli.Command{
				{
					Name:            "baz",
					SkipFlagParsing: true,
					Action: func(c *cli.Context) error {
						baz.Run()
						return nil
					},
				},
			},
		},
	}

	app.Run(os.Args)
}

original.go

package main

import (
	"flag"
	"fmt"
)

func main() {
	filename := flag.String("c", "", "filename of the JSON-based configuration file")
	flag.Parse()
	fmt.Printf("flag was `%v`", *filename)
}