Added Reader.ExtractTo for ease of use

reader.go

@@ -114,6 +114,15 @@ func NewSquashfsReader(r io.ReaderAt) (*Reader, error) {
 	return &rdr, nil
 }
 
+//ExtractTo tries to extract ALL files to the given path. This is the same as getting the root folder and extracting that.
+func (r *Reader) ExtractTo(path string) []error {
+	root, err := r.GetRootFolder()
+	if err != nil {
+		return []error{err}
+	}
+	return root.ExtractTo(path)
+}
+
 //GetRootFolder returns a squashfs.File that references the root directory of the squashfs archive.
 func (r *Reader) GetRootFolder() (root *File, err error) {
 	root = new(File)

squash_test.go

@@ -58,11 +58,7 @@ func TestAppImage(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	fil := rdr.GetFileAtPath(".DirIcon")
-	if fil == nil {
-		t.Fatal("Can't find desktop file")
-	}
-	errs := fil.ExtractSymlink(wd + "/testing/")
+	errs := rdr.ExtractTo(wd + "/testing/cool-retro")
 	if len(errs) > 0 {
 		t.Fatal(errs)
 	}