You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
31 lines
708 B
31 lines
708 B
package metricutil
|
|
|
|
import (
|
|
"errors"
|
|
"fmt"
|
|
"strings"
|
|
)
|
|
|
|
// SanitizeLabelName removes all invalid chars from the label name.
|
|
// If the label name is empty or contains only invalid chars, it
|
|
// will return an error.
|
|
func SanitizeLabelName(name string) (string, error) {
|
|
if len(name) == 0 {
|
|
return "", errors.New("label name cannot be empty")
|
|
}
|
|
|
|
out := strings.Builder{}
|
|
for i, b := range name {
|
|
if (b >= 'a' && b <= 'z') || (b >= 'A' && b <= 'Z') || b == '_' || (b >= '0' && b <= '9' && i > 0) {
|
|
out.WriteRune(b)
|
|
} else if b == ' ' {
|
|
out.WriteRune('_')
|
|
}
|
|
}
|
|
|
|
if out.Len() == 0 {
|
|
return "", fmt.Errorf("label name only contains invalid chars: %q", name)
|
|
}
|
|
|
|
return out.String(), nil
|
|
}
|
|
|