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Copy pathflag_float64.go
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111 lines (94 loc) · 2.44 KB
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package cli
import (
"flag"
"fmt"
"strconv"
)
// Float64Flag is a flag with type float64
type Float64Flag struct {
Name string
Aliases []string
Usage string
EnvVars []string
FilePath string
Required bool
Hidden bool
Value float64
DefaultText string
Destination *float64
HasBeenSet bool
}
// IsSet returns whether or not the flag has been set through env or file
func (f *Float64Flag) IsSet() bool {
return f.HasBeenSet
}
// String returns a readable representation of this value
// (for usage defaults)
func (f *Float64Flag) String() string {
return FlagStringer(f)
}
// Names returns the names of the flag
func (f *Float64Flag) Names() []string {
return flagNames(f.Name, f.Aliases)
}
// IsRequired returns whether or not the flag is required
func (f *Float64Flag) IsRequired() bool {
return f.Required
}
// TakesValue returns true of the flag takes a value, otherwise false
func (f *Float64Flag) TakesValue() bool {
return true
}
// GetUsage returns the usage string for the flag
func (f *Float64Flag) GetUsage() string {
return f.Usage
}
// 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("%f", f.Value)
}
// IsVisible returns true if the flag is not hidden, otherwise false
func (f *Float64Flag) IsVisible() bool {
return !f.Hidden
}
// Apply populates the flag given the flag set and environment
func (f *Float64Flag) Apply(set *flag.FlagSet) error {
if val, ok := flagFromEnvOrFile(f.EnvVars, f.FilePath); ok {
if val != "" {
valFloat, err := strconv.ParseFloat(val, 10)
if err != nil {
return fmt.Errorf("could not parse %q as float64 value for flag %s: %s", val, f.Name, err)
}
f.Value = valFloat
f.HasBeenSet = true
}
}
for _, name := range f.Names() {
if f.Destination != nil {
set.Float64Var(f.Destination, name, f.Value, f.Usage)
continue
}
set.Float64(name, f.Value, f.Usage)
}
return nil
}
// Float64 looks up the value of a local Float64Flag, returns
// 0 if not found
func (c *Context) Float64(name string) float64 {
if fs := c.lookupFlagSet(name); fs != nil {
return lookupFloat64(name, fs)
}
return 0
}
func lookupFloat64(name string, set *flag.FlagSet) float64 {
f := set.Lookup(name)
if f != nil {
parsed, err := strconv.ParseFloat(f.Value.String(), 64)
if err != nil {
return 0
}
return parsed
}
return 0
}