Refactor to use core.ObjectReader and core.ObjectWriter

* New function signatures provide the necessary interface to stream data from disk when using filesystem-based storage in the future
* New function signatures provide proper error handling
* ObjectReader and ObjectWriter interfaces added to avoid future refactoring, currently are type aliases for io.ReadCloser and io.WriteCloser respectively
* Object.Reader now returns (ObjectReader, error)
* Object.Writer now returns (ObjectWriter, error)
* File.Contents now returns (string, error)
* File.Lines now returns ([]string, error)
* Blob.Reader now returns (core.ObjectReader, error)
* Added internal close helper function for deferred calls to Close that need to check the return value

1 files changed, 1 insertions, 2 deletions

diff --git a/objects.go b/objects.go
index c43348f..961502a 100644
--- a/objects.go
+++ b/objects.go
@@ -4,7 +4,6 @@ import (
 	"bytes"
 	"errors"
 	"fmt"
-	"io"
 	"strconv"
 	"time"
 
@@ -35,7 +34,7 @@ func (b *Blob) Decode(o core.Object) error {
 }
 
 // Reader returns a reader allow the access to the content of the blob
-func (b *Blob) Reader() io.Reader {
+func (b *Blob) Reader() (core.ObjectReader, error) {
 	return b.obj.Reader()
 }