// write handler of logger.
func (l *clogger) Write(p []byte) (n int, err error) {
mutex.Lock()
defer mutex.Unlock()
for _, line := range strings.Split(string(p), "\n") {
if len(line) > 0 && line[len(line)-1] == '\n' {
line = line[0 : len(line)-2]
}
if line != "" {
log.Printf("[%s] %s", term.Color(l.proc, colors[l.idx]), term.Color(line, colors[l.idx]))
}
}
n = len(p)
return
}
// Error returns an error string with position information.
//
// The error format is as follows.
//
// (file:line:column): error: text
func (e *Error) Error() string {
// Use colors.
pos := fmt.Sprintf("(byte offset %d)", e.Pos)
prefix := "error:"
text := e.Text
if UseColor {
pos = term.Color(pos, term.Bold)
prefix = term.RedBold(prefix)
text = term.Color(text, term.Bold)
}
src := e.Src
if src == nil {
// If Src is nil, the error format is as follows.
//
// (byte offset %d) error: text
return fmt.Sprintf("%s %s %s", pos, prefix, text)
}
// The error format is as follows.
//
// (file:line) error: text
// 1 = y
// ^
line, col := src.Position(e.Pos)
end := len(src.Input)
if len(src.Lines) > line {
end = src.Lines[line]
}
srcLine := src.Input[src.Lines[line-1]:end]
srcLine = strings.Replace(srcLine, "\t", " ", -1)
srcLine = strings.TrimRight(srcLine, "\n\r")
arrow := fmt.Sprintf("%*s", col, "^")
pos = fmt.Sprintf("(%s:%d)", src.Path, line)
if UseColor {
pos = term.Color(pos, term.Bold)
arrow = term.Color(arrow, term.Bold)
}
return fmt.Sprintf("%s %s %s\n%s\n%s", pos, prefix, text, srcLine, arrow)
}