Merge pull request #214 from NyaaaWhatsUpDoc/improvement/update-storage-library

add git.iim.gay/grufwub/go-store for storage backend, replacing blob.Storage

1 files changed, 63 insertions, 0 deletions

diff --git a/vendor/git.iim.gay/grufwub/go-store/storage/errors.go b/vendor/git.iim.gay/grufwub/go-store/storage/errors.go
new file mode 100644
index 000000000..016593596
--- /dev/null
+++ b/vendor/git.iim.gay/grufwub/go-store/storage/errors.go
@@ -0,0 +1,63 @@
+package storage
+
+import (
+	"fmt"
+	"syscall"
+)
+
+// errorString is our own simple error type
+type errorString string
+
+// Error implements error
+func (e errorString) Error() string {
+	return string(e)
+}
+
+// Extend appends extra information to an errorString
+func (e errorString) Extend(s string, a ...interface{}) errorString {
+	return errorString(string(e) + ": " + fmt.Sprintf(s, a...))
+}
+
+var (
+	// ErrNotFound is the error returned when a key cannot be found in storage
+	ErrNotFound = errorString("store/storage: key not found")
+
+	// ErrAlreadyExist is the error returned when a key already exists in storage
+	ErrAlreadyExists = errorString("store/storage: key already exists")
+
+	// ErrInvalidkey is the error returned when an invalid key is passed to storage
+	ErrInvalidKey = errorString("store/storage: invalid key")
+
+	// errPathIsFile is returned when a path for a disk config is actually a file
+	errPathIsFile = errorString("store/storage: path is file")
+
+	// errNoHashesWritten is returned when no blocks are written for given input value
+	errNoHashesWritten = errorString("storage/storage: no hashes written")
+
+	// errInvalidNode is returned when read on an invalid node in the store is attempted
+	errInvalidNode = errorString("store/storage: invalid node")
+
+	// errCorruptNodes is returned when nodes with missing blocks are found during a BlockStorage clean
+	errCorruptNodes = errorString("store/storage: corrupted nodes")
+)
+
+// errSwapNoop performs no error swaps
+func errSwapNoop(err error) error {
+	return err
+}
+
+// ErrSwapNotFound swaps syscall.ENOENT for ErrNotFound
+func errSwapNotFound(err error) error {
+	if err == syscall.ENOENT {
+		return ErrNotFound
+	}
+	return err
+}
+
+// errSwapExist swaps syscall.EEXIST for ErrAlreadyExists
+func errSwapExist(err error) error {
+	if err == syscall.EEXIST {
+		return ErrAlreadyExists
+	}
+	return err
+}