42 lines
1.2 KiB
Go
42 lines
1.2 KiB
Go
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package common
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import (
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"fmt"
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"runtime"
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)
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// An error that remembers where it was thrown from
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type ErrorWithStacktrace struct {
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msg string
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stacktrace string
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cause error
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}
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// if msg is provided, msg is treated as the error message and the
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// error is treated as the original cause of this error. Otherwise the
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// error is used as the error message. This is useful for chaining
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// multiple errors to trace what was the original error that triggered
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// the subsequent errors
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func NewErrorWithStacktrace(cause error, msg ...interface{}) *ErrorWithStacktrace {
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buffer := make([]byte, 1024, 1042)
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n := runtime.Stack(buffer, false)
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message := ""
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if len(msg) > 0 {
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message = msg[0].(string)
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if len(msg) > 1 {
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message = fmt.Sprintf(message, msg[1:])
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}
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}
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return &ErrorWithStacktrace{message, string(buffer[:n]), cause}
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}
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func (self *ErrorWithStacktrace) Error() string {
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if self.msg == "" {
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return fmt.Sprintf("%s. Stacktrace:\n%s\n", self.cause, self.stacktrace)
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}
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if self.cause == nil {
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return fmt.Sprintf("%s. Stacktrace:\n%s\n", self.msg, self.stacktrace)
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}
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return fmt.Sprintf("%s. Stacktrace:\n%s\nCaused by: %s", self.msg, self.stacktrace, self.cause)
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}
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