A simple errors package that dynamically prepends the package name.
Open a terminal and run the following:
$ go get -u github.com/mjwhitta/errors
Below is a sample usage:
package mypackage
import (
"os"
"github.com/mjwhitta/errors"
)
func OpenFileByName(name string) (*os.File, error) {
var e error
var f *os.File
if name == "" {
return nil, errors.New("no name was provided")
}
if f, e = os.Open(name); e != nil {
return nil, errors.Newf("failed to open %s: %w", name, e)
}
return f, nil
}