forked from therecipe/qt
/
flags.go
52 lines (45 loc) · 1.08 KB
/
flags.go
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package utils
import (
"fmt"
"strings"
)
// AppendToFlag is a quick function that appends content to a flag if is already defined
func AppendToFlag(flags []string, flag, content string) []string {
// no content to append to flag
if content == "" {
return flags
}
var (
extractedFlag string
match, simpleFlag bool
)
for index, flagEntry := range flags {
// checks if is simple flag or has an assignation
if asigIndex := strings.IndexRune(flagEntry, '='); asigIndex != -1 {
// extracts flag
extractedFlag = flagEntry[:asigIndex]
simpleFlag = false
} else {
extractedFlag = flagEntry
simpleFlag = true
}
// if flags are equal appends content to existing assignation
if extractedFlag == flag {
if !simpleFlag {
flagEntry += " " + content
} else {
flagEntry = fmt.Sprintf("%s=%s", flag, content)
}
flags[index] = flagEntry
match = true
break
}
}
// Flag not found, so appends new flag to list
if !match {
flags = append(flags, fmt.Sprintf("%s=%s", flag, content))
}
return flags
}
// TODO func SetFlag
// TODO MergeFlags