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package cli
import (
"flag"
"fmt"
"strconv"
)
// Uint64Flag is a flag with type uint64
type Uint64Flag struct {
Name string
Usage string
EnvVar string
FilePath string
Required bool
Hidden bool
Value uint64
Destination *uint64
}
// String returns a readable representation of this value
// (for usage defaults)
func (f Uint64Flag) String() string {
return FlagStringer(f)
}
// GetName returns the name of the flag
func (f Uint64Flag) GetName() string {
return f.Name
}
// IsRequired returns whether or not the flag is required
func (f Uint64Flag) IsRequired() bool {
return f.Required
}
// TakesValue returns true of the flag takes a value, otherwise false
func (f Uint64Flag) TakesValue() bool {
return true
}
// GetUsage returns the usage string for the flag
func (f Uint64Flag) 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 Uint64Flag) GetValue() string {
return fmt.Sprintf("%d", f.Value)
}
// Apply populates the flag given the flag set and environment
// Ignores errors
func (f Uint64Flag) Apply(set *flag.FlagSet) {
_ = f.ApplyWithError(set)
}
// ApplyWithError populates the flag given the flag set and environment
func (f Uint64Flag) ApplyWithError(set *flag.FlagSet) error {
if envVal, ok := flagFromFileEnv(f.FilePath, f.EnvVar); ok {
envValInt, err := strconv.ParseUint(envVal, 0, 64)
if err != nil {
return fmt.Errorf("could not parse %s as uint64 value for flag %s: %s", envVal, f.Name, err)
}
f.Value = envValInt
}
eachName(f.Name, func(name string) {
if f.Destination != nil {
set.Uint64Var(f.Destination, name, f.Value, f.Usage)
return
}
set.Uint64(name, f.Value, f.Usage)
})
return nil
}
// Uint64 looks up the value of a local Uint64Flag, returns
// 0 if not found
func (c *Context) Uint64(name string) uint64 {
return lookupUint64(name, c.flagSet)
}
// GlobalUint64 looks up the value of a global Uint64Flag, returns
// 0 if not found
func (c *Context) GlobalUint64(name string) uint64 {
if fs := lookupGlobalFlagSet(name, c); fs != nil {
return lookupUint64(name, fs)
}
return 0
}
func lookupUint64(name string, set *flag.FlagSet) uint64 {
f := set.Lookup(name)
if f != nil {
parsed, err := strconv.ParseUint(f.Value.String(), 0, 64)
if err != nil {
return 0
}
return parsed
}
return 0
}
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