109 lines
2.4 KiB
Go
109 lines
2.4 KiB
Go
|
package cli
|
||
|
|
|
||
|
|
import (
|
||
|
|
"flag"
|
||
|
|
"fmt"
|
||
|
|
)
|
||
|
|
|
||
|
|
// Generic is a generic parseable type identified by a specific flag
|
||
|
|
type Generic interface {
|
||
|
|
Set(value string) error
|
||
|
|
String() string
|
||
|
|
}
|
||
|
|
|
||
|
|
// GenericFlag is a flag with type Generic
|
||
|
|
type GenericFlag struct {
|
||
|
|
Name string
|
||
|
|
Aliases []string
|
||
|
|
Usage string
|
||
|
|
EnvVars []string
|
||
|
|
FilePath string
|
||
|
|
Required bool
|
||
|
|
Hidden bool
|
||
|
|
TakesFile bool
|
||
|
|
Value Generic
|
||
|
|
DefaultText string
|
||
|
|
HasBeenSet bool
|
||
|
|
}
|
||
|
|
|
||
|
|
// IsSet returns whether or not the flag has been set through env or file
|
||
|
|
func (f *GenericFlag) IsSet() bool {
|
||
|
|
return f.HasBeenSet
|
||
|
|
}
|
||
|
|
|
||
|
|
// String returns a readable representation of this value
|
||
|
|
// (for usage defaults)
|
||
|
|
func (f *GenericFlag) String() string {
|
||
|
|
return FlagStringer(f)
|
||
|
|
}
|
||
|
|
|
||
|
|
// Names returns the names of the flag
|
||
|
|
func (f *GenericFlag) Names() []string {
|
||
|
|
return flagNames(f.Name, f.Aliases)
|
||
|
|
}
|
||
|
|
|
||
|
|
// IsRequired returns whether or not the flag is required
|
||
|
|
func (f *GenericFlag) IsRequired() bool {
|
||
|
|
return f.Required
|
||
|
|
}
|
||
|
|
|
||
|
|
// TakesValue returns true of the flag takes a value, otherwise false
|
||
|
|
func (f *GenericFlag) TakesValue() bool {
|
||
|
|
return true
|
||
|
|
}
|
||
|
|
|
||
|
|
// GetUsage returns the usage string for the flag
|
||
|
|
func (f *GenericFlag) 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 *GenericFlag) GetValue() string {
|
||
|
|
if f.Value != nil {
|
||
|
|
return f.Value.String()
|
||
|
|
}
|
||
|
|
return ""
|
||
|
|
}
|
||
|
|
|
||
|
|
// Apply takes the flagset and calls Set on the generic flag with the value
|
||
|
|
// provided by the user for parsing by the flag
|
||
|
|
func (f GenericFlag) Apply(set *flag.FlagSet) error {
|
||
|
|
if val, ok := flagFromEnvOrFile(f.EnvVars, f.FilePath); ok {
|
||
|
|
if val != "" {
|
||
|
|
if err := f.Value.Set(val); err != nil {
|
||
|
|
return fmt.Errorf("could not parse %q as value for flag %s: %s", val, f.Name, err)
|
||
|
|
}
|
||
|
|
|
||
|
|
f.HasBeenSet = true
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
for _, name := range f.Names() {
|
||
|
|
set.Var(f.Value, name, f.Usage)
|
||
|
|
}
|
||
|
|
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
// Generic looks up the value of a local GenericFlag, returns
|
||
|
|
// nil if not found
|
||
|
|
func (c *Context) Generic(name string) interface{} {
|
||
|
|
if fs := lookupFlagSet(name, c); fs != nil {
|
||
|
|
return lookupGeneric(name, fs)
|
||
|
|
}
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
func lookupGeneric(name string, set *flag.FlagSet) interface{} {
|
||
|
|
f := set.Lookup(name)
|
||
|
|
if f != nil {
|
||
|
|
parsed, err := f.Value, error(nil)
|
||
|
|
if err != nil {
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
return parsed
|
||
|
|
}
|
||
|
|
return nil
|
||
|
|
}
|