Cleanup, fix issue with package being removed after being updated with the same ver

deb/archive/archive.go

@@ -1,15 +1,15 @@
 package archive
 
 import (
-	"os"
+	"archive/tar"
+	"bytes"
+	"compress/gzip"
 	"fmt"
 	"github.com/blakesmith/ar"
-	"bytes"
 	"io"
-	"strings"
-	"compress/gzip"
-	"archive/tar"
 	"log"
+	"os"
+	"strings"
 )
 
 func InspectPackage(filename string) (string, error) {
@@ -21,7 +21,6 @@ func InspectPackage(filename string) (string, error) {
 
 	arReader := ar.NewReader(f)
 	defer f.Close()
-	var controlBuf bytes.Buffer
 
 	for {
 		header, err := arReader.Next()
@@ -35,15 +34,14 @@ func InspectPackage(filename string) (string, error) {
 		}
 
 		if strings.Trim(header.Name, "/") == "control.tar.gz" {
-			io.Copy(&controlBuf, arReader)
-			return InspectPackageControl(controlBuf)
+			return InspectPackageControl(arReader)
 		}
 	}
 	return "", nil
 }
 
-func InspectPackageControl(filename bytes.Buffer) (string, error) {
-	gzf, err := gzip.NewReader(bytes.NewReader(filename.Bytes()))
+func InspectPackageControl(reader io.Reader) (string, error) {
+	gzf, err := gzip.NewReader(reader)
 	if err != nil {
 		return "", fmt.Errorf("error creating gzip reader: %s", err)
 	}