urfave-cli/flag_float64.go

package cli

import (
	"flag"
	"fmt"
	"strconv"
)

// GetValue returns the flags value as string representation and an empty
// string if the flag takes no value at all.
func (f *Float64Flag) GetValue() string {
	return fmt.Sprintf("%v", f.Value)
}

// GetDefaultText returns the default text for this flag
func (f *Float64Flag) GetDefaultText() string {
	if f.DefaultText != "" {
		return f.DefaultText
	}
	return f.GetValue()
}

// Apply populates the flag given the flag set and environment
func (f *Float64Flag) Apply(set *flag.FlagSet) error {
	if val, source, found := flagFromEnvOrFile(f.EnvVars, f.FilePath); found {
		if val != "" {
			valFloat, err := strconv.ParseFloat(val, 64)
			if err != nil {
				return fmt.Errorf("could not parse %q as float64 value from %s for flag %s: %s", val, source, f.Name, err)
			}

			f.Value = valFloat
			f.HasBeenSet = true