required parameters don't work with altsrc #849
Description
Hi,
Unless I'm somehow overlooking something obvious, it seems the new Required support introduced in #819 doesn't work with altsrc.
The following code (based on the example for altsrc) complains that someflag wasn't supported if Required: true, but works if you comment that line out.
package main
import (
"fmt"
"log"
"os"
"github.com/urfave/cli"
"github.com/urfave/cli/altsrc"
)
func main() {
app := cli.NewApp()
flags := []cli.Flag{
altsrc.NewIntFlag(cli.IntFlag{
Name: "someflag",
Required: true,
}),
cli.StringFlag{
Name: "file",
Value: "test_cli_yaml.yaml",
},
}
app.Action = func(c *cli.Context) error {
fmt.Printf("test: %s\n", c.String("someflag"))
return nil
}
app.Before = altsrc.InitInputSourceWithContext(flags, altsrc.NewYamlSourceFromFlagFunc("file"))
app.Flags = flags
err := app.Run(os.Args)
if err != nil {
log.Fatal(err)
}
}And the accompanying YAML file (test_cli_yaml.yaml):
---
someflag: 1@lynncyrin, I suspect your question in #825 might be related to this, right?