workflow

1. start

   var errs errors.Err
   var err error

2. error occurs in come code somewhere

   err = someFunc()

3. capture and wrap the error to add context

   if nil != err {
       errs = errors.Wrap(err, 0, "the call to someFunc to do some particular work failed")
   }

4. do some more work, repeat

   // if someFunc failed do a thing
   if nil != err {
       errs = errors.Wrap(err, 0, "the call to someFunc to do some particular work failed")
       err = buidSome()
       if nil != err {
           errs = errors.Wrap(err, 0, "could not build 'some'")
       }
   }