Function readLinePrefix

git/parser/diff_headers.go:101–125

readLinePrefix will consume the entire line from the reader, but will return only the first maxLen bytes from it - the rest is discarded. Returns io.EOF when the end of the input has been reached.

(br *bufio.Reader, maxLen int)

// but will return only the first maxLen bytes from it - the rest is discarded.
// Returns io.EOF when the end of the input has been reached.
func readLinePrefix(br *bufio.Reader, maxLen int) (line string, err error) {
	for {
		var raw []byte
		var isPrefix bool

		raw, isPrefix, err = br.ReadLine()
		if err != nil && err != io.EOF { //nolint:errorlint
			return "", err
		}

		if needMore := maxLen - len(line); needMore > 0 {
			if len(raw) > needMore {
				line += string(raw[:needMore])
			} else {
				line += string(raw)
			}
		}

		if !isPrefix || len(raw) == 0 {
			break
		}
	}

	return line, err
}