mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
synced 2024-12-15 16:30:55 +01:00
91 lines
2.0 KiB
Go
91 lines
2.0 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
|
||
}
|
||
|
||
// 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 ""
|
||
}
|
||
|
||
// GetDefaultText returns the default text for this flag
|
||
func (f *GenericFlag) GetDefaultText() string {
|
||
if f.DefaultText != "" {
|
||
return f.DefaultText
|
||
}
|
||
return f.GetValue()
|
||
}
|
||
|
||
// GetEnvVars returns the env vars for this flag
|
||
func (f *GenericFlag) GetEnvVars() []string {
|
||
return f.EnvVars
|
||
}
|
||
|
||
// 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
|
||
}
|
||
|
||
// Get returns the flag’s value in the given Context.
|
||
func (f *GenericFlag) Get(ctx *Context) interface{} {
|
||
return ctx.Generic(f.Name)
|
||
}
|
||
|
||
// Generic looks up the value of a local GenericFlag, returns
|
||
// nil if not found
|
||
func (cCtx *Context) Generic(name string) interface{} {
|
||
if fs := cCtx.lookupFlagSet(name); 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
|
||
}
|