mirror of https://github.com/vbatts/tar-split.git
99 lines
2.2 KiB
Go
99 lines
2.2 KiB
Go
package cli
|
|
|
|
import "flag"
|
|
|
|
// StringFlag is a flag with type string
|
|
type StringFlag struct {
|
|
Name string
|
|
Usage string
|
|
EnvVar string
|
|
FilePath string
|
|
Required bool
|
|
Hidden bool
|
|
TakesFile bool
|
|
Value string
|
|
Destination *string
|
|
}
|
|
|
|
// String returns a readable representation of this value
|
|
// (for usage defaults)
|
|
func (f StringFlag) String() string {
|
|
return FlagStringer(f)
|
|
}
|
|
|
|
// GetName returns the name of the flag
|
|
func (f StringFlag) GetName() string {
|
|
return f.Name
|
|
}
|
|
|
|
// IsRequired returns whether or not the flag is required
|
|
func (f StringFlag) IsRequired() bool {
|
|
return f.Required
|
|
}
|
|
|
|
// TakesValue returns true of the flag takes a value, otherwise false
|
|
func (f StringFlag) TakesValue() bool {
|
|
return true
|
|
}
|
|
|
|
// GetUsage returns the usage string for the flag
|
|
func (f StringFlag) 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 StringFlag) GetValue() string {
|
|
return f.Value
|
|
}
|
|
|
|
// Apply populates the flag given the flag set and environment
|
|
// Ignores errors
|
|
func (f StringFlag) Apply(set *flag.FlagSet) {
|
|
_ = f.ApplyWithError(set)
|
|
}
|
|
|
|
// ApplyWithError populates the flag given the flag set and environment
|
|
func (f StringFlag) ApplyWithError(set *flag.FlagSet) error {
|
|
if envVal, ok := flagFromFileEnv(f.FilePath, f.EnvVar); ok {
|
|
f.Value = envVal
|
|
}
|
|
|
|
eachName(f.Name, func(name string) {
|
|
if f.Destination != nil {
|
|
set.StringVar(f.Destination, name, f.Value, f.Usage)
|
|
return
|
|
}
|
|
set.String(name, f.Value, f.Usage)
|
|
})
|
|
|
|
return nil
|
|
}
|
|
|
|
// String looks up the value of a local StringFlag, returns
|
|
// "" if not found
|
|
func (c *Context) String(name string) string {
|
|
return lookupString(name, c.flagSet)
|
|
}
|
|
|
|
// GlobalString looks up the value of a global StringFlag, returns
|
|
// "" if not found
|
|
func (c *Context) GlobalString(name string) string {
|
|
if fs := lookupGlobalFlagSet(name, c); fs != nil {
|
|
return lookupString(name, fs)
|
|
}
|
|
return ""
|
|
}
|
|
|
|
func lookupString(name string, set *flag.FlagSet) string {
|
|
f := set.Lookup(name)
|
|
if f != nil {
|
|
parsed, err := f.Value.String(), error(nil)
|
|
if err != nil {
|
|
return ""
|
|
}
|
|
return parsed
|
|
}
|
|
return ""
|
|
}
|