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interface.go
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interface.go
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package errors
import (
"errors"
"fmt"
"strings"
"github.com/go-stack/stack"
)
// Tracer provides a stack trace
type Tracer interface {
// Trace returns the long format stack trace from where the error was instantiated
Trace() []string
}
// TracerError is an amalgamation of the Tracer and error interfaces
type TracerError interface {
Tracer
error
}
// New instantiates a TracerError with a stack trace
func New(format string, args ...interface{}) TracerError {
return &errorTracer{
message: fmt.Sprintf(format, args...),
trace: GetStackTrace(),
}
}
type errorTracer struct {
message string
trace []string
}
func (err *errorTracer) Error() string {
return err.message
}
func (err *errorTracer) Trace() []string {
return err.trace
}
// GetStackTrace retrieves the full stack (minus any runtime related functions) from where the Error was instantiated
func GetStackTrace() []string {
//may want to trim the log calls, may want to return this differently so that it can be formatted in other ways
trace := stack.Trace().TrimRuntime()
var longTrace []string
for _, t := range trace {
tf := fmt.Sprintf("%+v", t)
// only remove frames that originate in this file
if !strings.HasPrefix(tf, "github.com/beaconsoftwarellc/gadget/errors/interface.go") {
longTrace = append(longTrace, tf)
}
}
return longTrace
}
type wrapErrorTracer struct {
err error
trace []string
}
// Wrap an existing error in a TracerError
func Wrap(err error) TracerError {
if nil == err {
return nil
}
tracerError, ok := err.(TracerError)
if !ok {
return &wrapErrorTracer{
err: err,
trace: GetStackTrace(),
}
}
return tracerError
}
func (err *wrapErrorTracer) Error() string {
return err.err.Error()
}
func (err *wrapErrorTracer) Trace() []string {
return err.trace
}
func Is(err, target error) bool {
return errors.Is(err, target)
}
func As(err error, target any) bool {
return errors.As(err, target)
}