blockstore: only close the file on error in OpenReadWrite, not OpenR…

…eadWriteFile

OpenReadWriteFile gives full control of the file to the caller, so it should not
decide to close the file, even on error.

v2/blockstore/readwrite.go

@@ -86,6 +86,12 @@ func OpenReadWrite(path string, roots []cid.Cid, opts ...carv2.Option) (*ReadWri
 	if err != nil {
 		return nil, fmt.Errorf("could not open read/write file: %w", err)
 	}
+	// If construction of blockstore fails, make sure to close off the open file.
+	defer func() {
+		if err != nil {
+			f.Close()
+		}
+	}()
 	rwbs, err := OpenReadWriteFile(f, roots, opts...)
 	if err != nil {
 		return nil, err
@@ -100,17 +106,11 @@ func OpenReadWrite(path string, roots []cid.Cid, opts ...carv2.Option) (*ReadWri
 func OpenReadWriteFile(f *os.File, roots []cid.Cid, opts ...carv2.Option) (*ReadWrite, error) {
 	stat, err := f.Stat()
 	if err != nil {
-		// Note, we should not get a an os.ErrNotExist here because the flags used to open file includes os.O_CREATE
+		// Note, we should not get an os.ErrNotExist here because the flags used to open file includes os.O_CREATE
 		return nil, err
 	}
 	// Try and resume by default if the file size is non-zero.
 	resume := stat.Size() != 0
-	// If construction of blockstore fails, make sure to close off the open file.
-	defer func() {
-		if err != nil {
-			f.Close()
-		}
-	}()
 
 	// Instantiate block store.
 	// Set the header fileld before applying options since padding options may modify header.