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package util
import (
"io"
"regexp"
)
// Strip ansi control characters from source
//
// The source reader is automatically closed when stripper reader is
type AnsiStripper struct {
regex regexp.Regexp
source io.ReadCloser
}
func NewAnsiStripper(source io.ReadCloser) *AnsiStripper {
striper := new(AnsiStripper)
striper.regex = *regexp.MustCompile(`\x1b[[0-9;]*m`)
striper.source = source
return striper
}
func (rc AnsiStripper) Read(p []byte) (int, error) {
n, err := rc.source.Read(p)
if err != io.EOF && err != nil {
return n, err
}
stripped := rc.regex.ReplaceAll(p[:n], []byte(""))
n = copy(p, stripped)
return n, err
}
func (rc AnsiStripper) Close() error {
return rc.source.Close()
}
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