/
flag.go
48 lines (42 loc) · 944 Bytes
/
flag.go
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package astikit
import (
"os"
"strings"
)
// FlagCmd retrieves the command from the input Args
func FlagCmd() (o string) {
if len(os.Args) >= 2 && os.Args[1][0] != '-' {
o = os.Args[1]
os.Args = append([]string{os.Args[0]}, os.Args[2:]...)
}
return
}
// FlagStrings represents a flag that can be set several times and
// stores unique string values
type FlagStrings struct {
Map map[string]bool
Slice *[]string
}
// NewFlagStrings creates a new FlagStrings
func NewFlagStrings() FlagStrings {
return FlagStrings{
Map: make(map[string]bool),
Slice: &[]string{},
}
}
// String implements the flag.Value interface
func (f FlagStrings) String() string {
if f.Slice == nil {
return ""
}
return strings.Join(*f.Slice, ",")
}
// Set implements the flag.Value interface
func (f FlagStrings) Set(i string) error {
if _, ok := f.Map[i]; ok {
return nil
}
f.Map[i] = true
*f.Slice = append(*f.Slice, i)
return nil
}