Moves files

internal/backend.go

@@ -0,0 +1,47 @@
+package restic
+
+import (
+	"context"
+	"io"
+)
+
+// Backend is used to store and access data.
+type Backend interface {
+	// Location returns a string that describes the type and location of the
+	// repository.
+	Location() string
+
+	// Test a boolean value whether a File with the name and type exists.
+	Test(ctx context.Context, h Handle) (bool, error)
+
+	// Remove removes a File with type t and name.
+	Remove(ctx context.Context, h Handle) error
+
+	// Close the backend
+	Close() error
+
+	// Save stores the data in the backend under the given handle.
+	Save(ctx context.Context, h Handle, rd io.Reader) error
+
+	// Load returns a reader that yields the contents of the file at h at the
+	// given offset. If length is larger than zero, only a portion of the file
+	// is returned. rd must be closed after use. If an error is returned, the
+	// ReadCloser must be nil.
+	Load(ctx context.Context, h Handle, length int, offset int64) (io.ReadCloser, error)
+
+	// Stat returns information about the File identified by h.
+	Stat(ctx context.Context, h Handle) (FileInfo, error)
+
+	// List returns a channel that yields all names of files of type t in an
+	// arbitrary order. A goroutine is started for this, which is stopped when
+	// ctx is cancelled.
+	List(ctx context.Context, t FileType) <-chan string
+
+	// IsNotExist returns true if the error was caused by a non-existing file
+	// in the backend.
+	IsNotExist(err error) bool
+}
+
+// FileInfo is returned by Stat() and contains information about a file in the
+// backend.
+type FileInfo struct{ Size int64 }