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Add errors package for exit code handling
To get a better exit code handling including logrus logging I have defined a custom errors package which uses logrus to log error messages.
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73
errors/errors.go
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73
errors/errors.go
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package errors
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import (
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"fmt"
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"os"
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"github.com/sirupsen/logrus"
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)
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// ExitCoder defines the interface for exit code handling.
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type ExitCoder interface {
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error
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Code() int
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Fields() logrus.Fields
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}
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// ExitError simply implements the defined interface.
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type ExitError struct {
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message interface{}
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code int
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fields logrus.Fields
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}
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// Error implements the ExitCoder interface.
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func (e ExitError) Error() string {
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return fmt.Sprintf("%v", e.message)
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}
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// Code implements the ExitCoder interface.
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func (e ExitError) Code() int {
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return e.code
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}
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// Fields implements the ExitCoder interface.
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func (e ExitError) Fields() logrus.Fields {
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return e.fields
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}
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// ExitMessage initiales a new ExitCoder implementation.
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func ExitMessage(message interface{}) ExitError {
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return ExitError{
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message: message,
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code: 1,
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}
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}
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// WithFields initiales a new ExitCoder implementation.
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func WithFields(message interface{}, fields logrus.Fields) ExitError {
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return ExitError{
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message: message,
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code: 1,
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fields: fields,
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}
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}
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// HandleExit ist used within the main handler to exit properly.
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func HandleExit(err error) {
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if err == nil {
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return
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}
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if e, ok := err.(ExitCoder); ok {
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if e.Error() != "" {
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logrus.WithFields(
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e.Fields(),
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).Error(
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e.Error(),
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)
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}
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os.Exit(e.Code())
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}
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}
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