refactor: Inject mtio package to allow for remote implementation

pkg/tape/manager.go

@@ -10,6 +10,7 @@ import (
 
 type TapeManager struct {
 	drive      string
+	mt         config.MagneticTapeIO
 	recordSize int
 	overwrite  bool
 
@@ -26,11 +27,13 @@ type TapeManager struct {
 
 func NewTapeManager(
 	drive string,
+	mt config.MagneticTapeIO,
 	recordSize int,
 	overwrite bool,
 ) *TapeManager {
 	return &TapeManager{
 		drive:      drive,
+		mt:         mt,
 		recordSize: recordSize,
 		overwrite:  overwrite,
 	}
@@ -47,6 +50,7 @@ func (m *TapeManager) GetWriter() (config.DriveWriterConfig, error) {
 
 	writer, writerIsRegular, err := OpenTapeWriteOnly(
 		m.drive,
+		m.mt,
 		m.recordSize,
 		overwrite,
 	)

pkg/tape/write.go

@@ -3,10 +3,15 @@ package tape
 import (
 	"os"
 
-	"github.com/pojntfx/stfs/internal/mtio"
+	"github.com/pojntfx/stfs/pkg/config"
 )
 
-func OpenTapeWriteOnly(drive string, recordSize int, overwrite bool) (f *os.File, isRegular bool, err error) {
+func OpenTapeWriteOnly(
+	drive string,
+	mt config.MagneticTapeIO,
+	recordSize int,
+	overwrite bool,
+) (f *os.File, isRegular bool, err error) {
 	stat, err := os.Stat(drive)
 	if err == nil {
 		isRegular = stat.Mode().IsRegular()
@@ -40,7 +45,7 @@ func OpenTapeWriteOnly(drive string, recordSize int, overwrite bool) (f *os.File
 			}
 
 			// Seek to the start of the tape
-			if err := mtio.SeekToRecordOnTape(f.Fd(), 0); err != nil {
+			if err := mt.SeekToRecordOnTape(f.Fd(), 0); err != nil {
 				return nil, false, err
 			}
 
@@ -65,7 +70,7 @@ func OpenTapeWriteOnly(drive string, recordSize int, overwrite bool) (f *os.File
 
 		if !overwrite {
 			// Go to end of tape
-			if err := mtio.GoToEndOfTape(f.Fd()); err != nil {
+			if err := mt.GoToEndOfTape(f.Fd()); err != nil {
 				return nil, false, err
 			}
 		}