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- package cli
-
- import (
- "flag"
- "fmt"
- "strconv"
- )
-
- // Float64Flag is a flag with type float64
- type Float64Flag struct {
- Name string
- Usage string
- EnvVar string
- FilePath string
- Required bool
- Hidden bool
- Value float64
- Destination *float64
- }
-
- // String returns a readable representation of this value
- // (for usage defaults)
- func (f Float64Flag) String() string {
- return FlagStringer(f)
- }
-
- // GetName returns the name of the flag
- func (f Float64Flag) GetName() string {
- return f.Name
- }
-
- // 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)
- }
-
- // Float64 looks up the value of a local Float64Flag, returns
- // 0 if not found
- func (c *Context) Float64(name string) float64 {
- return lookupFloat64(name, c.flagSet)
- }
-
- // GlobalFloat64 looks up the value of a global Float64Flag, returns
- // 0 if not found
- func (c *Context) GlobalFloat64(name string) float64 {
- if fs := lookupGlobalFlagSet(name, c); fs != nil {
- return lookupFloat64(name, fs)
- }
- return 0
- }
-
- // Apply populates the flag given the flag set and environment
- // Ignores errors
- func (f Float64Flag) Apply(set *flag.FlagSet) {
- _ = f.ApplyWithError(set)
- }
-
- // ApplyWithError populates the flag given the flag set and environment
- func (f Float64Flag) ApplyWithError(set *flag.FlagSet) error {
- if envVal, ok := flagFromFileEnv(f.FilePath, f.EnvVar); ok {
- envValFloat, err := strconv.ParseFloat(envVal, 10)
- if err != nil {
- return fmt.Errorf("could not parse %s as float64 value for flag %s: %s", envVal, f.Name, err)
- }
-
- f.Value = envValFloat
- }
-
- eachName(f.Name, func(name string) {
- if f.Destination != nil {
- set.Float64Var(f.Destination, name, f.Value, f.Usage)
- return
- }
- set.Float64(name, f.Value, f.Usage)
- })
-
- return nil
- }
-
- 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
- }
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