restic/internal/backend/file.go

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package backend
import (
"fmt"
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"github.com/restic/restic/internal/errors"
)
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// FileType is the type of a file in the backend.
type FileType uint8
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// These are the different data types a backend can store.
const (
PackFile FileType = 1 + iota
KeyFile
LockFile
SnapshotFile
IndexFile
ConfigFile
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)
func (t FileType) String() string {
s := "invalid"
switch t {
case PackFile:
// Spelled "data" instead of "pack" for historical reasons.
s = "data"
case KeyFile:
s = "key"
case LockFile:
s = "lock"
case SnapshotFile:
s = "snapshot"
case IndexFile:
s = "index"
case ConfigFile:
s = "config"
}
return s
}
// Handle is used to store and access data in a backend.
type Handle struct {
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Type FileType
IsMetadata bool
Name string
}
func (h Handle) String() string {
name := h.Name
if len(name) > 10 {
name = name[:10]
}
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return fmt.Sprintf("<%s/%s>", h.Type, name)
}
// Valid returns an error if h is not valid.
func (h Handle) Valid() error {
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switch h.Type {
case PackFile:
case KeyFile:
case LockFile:
case SnapshotFile:
case IndexFile:
case ConfigFile:
default:
return errors.Errorf("invalid Type %d", h.Type)
}
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if h.Type == ConfigFile {
return nil
}
if h.Name == "" {
return errors.New("invalid Name")
}
return nil
}