Exemplo n.º 1
0
func saveErrorReport(caught error) (string, error) {
	logFile, err := ioutil.TempFile(os.TempDir(), "repeatr-error-report-")
	if err != nil {
		return "", err
	}
	defer logFile.Close()
	fmt.Fprintf(logFile, "Repeatr error report\n")
	fmt.Fprintf(logFile, "====================\n")
	fmt.Fprintf(logFile, "Date: %s\n", time.Now())
	fmt.Fprintf(logFile, "Briefly: %s\n", errors.GetMessage(caught))
	fmt.Fprintf(logFile, "\n")
	fmt.Fprintf(logFile, "Full error:\n")
	fmt.Fprintf(logFile, "-----------\n")
	fmt.Fprintf(logFile, "%s\n", caught)
	fmt.Fprintf(logFile, "\n")
	fmt.Fprintf(logFile, "Structure:\n")
	fmt.Fprintf(logFile, "-----------\n")
	fmt.Fprintf(logFile, "%#v\n", caught)
	fmt.Fprintf(logFile, "\n")
	// Record the stack.
	// This is the same string format as golang panics when they crash the program.
	// Note that if you didn't panic, it's... hard to get any useful data to you.
	// Even if capturing stacks yourself (or using an error library to do it for you),
	//  the printing options available for captured stacks as possible for anyone
	//   outside of the golang core are... limited; the runtime "cheats" here, and
	//    and doesn't expose the same powers to anyone on the outside.
	fmt.Fprintf(logFile, "Stack:\n")
	fmt.Fprintf(logFile, "-----------\n")
	buf := make([]byte, 1024*1024)
	n := runtime.Stack(buf, false)
	fmt.Fprintf(logFile, "%s\n", buf[0:n])
	fmt.Fprintf(logFile, "\n")
	return logFile.Name(), nil
}
Exemplo n.º 2
0
// GetErrorBody will return the user-visible error message given an error.
// The message will be determined by errors.GetMessage() unless the error class
// has an error body overridden by OverrideErrorBody.
func GetErrorBody(err error) string {
	rv := errors.GetData(err, errorBody)
	message, ok := rv.(string)
	if !ok {
		return errors.GetMessage(err)
	}
	class := errors.GetClass(err)
	if class == nil {
		return message
	}
	return fmt.Sprintf("%s: %s", class.String(), message)
}
Exemplo n.º 3
0
func main() {
	try.Do(func() {
		cli.Main(os.Args, os.Stderr, os.Stdout)
	}).Catch(cli.Exit, func(err *errors.Error) {
		// Errors marked as valid user-facing issues get a nice
		// pretty-printed route out, and may include specified exit codes.
		fmt.Fprintf(os.Stderr,
			"%s\n",
			err.Message())
		// exit, taking the specified code if any.
		code := errors.GetData(err, cli.ExitCodeKey)
		if code == nil {
			os.Exit(int(0))
		}
		os.Exit(int(code.(cli.ExitCode)))
	}).Catch(cli.Error, func(err *errors.Error) {
		// Errors marked as valid user-facing issues get a nice
		// pretty-printed route out, and may include specified exit codes.
		if isDebugMode() {
			// in debug-mode, repanic all the way to death so that we get all of golang's built in log features.
			panic(err)
		} else {
			// print nicely.
			fmt.Fprintf(os.Stderr,
				"Repeatr was unable to complete your request!\n"+
					"%s\n",
				err.Message())
			// exit, taking the specified code if any.
			code := errors.GetData(err, cli.ExitCodeKey)
			if code == nil {
				os.Exit(int(cli.EXIT_USER))
			}
			os.Exit(int(code.(cli.ExitCode)))
		}
	}).CatchAll(func(err error) {
		// Errors that aren't marked as valid user-facing issues should be
		// logged in preparation for a bug report.
		if isDebugMode() {
			// in debug-mode, repanic all the way to death so that we get all of golang's built in log features.
			panic(err)
		} else {
			// save the error to a file.  we want to keep the stacks, but not scare away the user.
			logPath, saveErr := saveErrorReport(err)
			var saveMsg string
			if saveErr == nil {
				saveMsg = fmt.Sprintf("We've logged the full error to a file: %q.  Please include this in the report.", logPath)
			} else {
				saveMsg = fmt.Sprintf("Additionally, we were unable to save a full log of the problem (\"%s\").", saveErr)
			}
			fmt.Fprintf(os.Stderr,
				"Repeatr encountered a serious issue and was unable to complete your request!\n"+
					"Please file an issue to help us fix it.\n"+
					"%s\n"+
					"\n"+
					"This is the short version of the problem:\n"+
					"%s\n",
				saveMsg,
				errors.GetMessage(err),
			)
			os.Exit(int(cli.EXIT_UNKNOWNPANIC))
		}
	}).Done()
}