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restic/internal/backend/layout/layout_s3legacy.go
2022-10-21 21:36:05 +02:00

78 lines
1.8 KiB
Go

package layout
import "github.com/restic/restic/internal/restic"
// S3LegacyLayout implements the old layout used for s3 cloud storage backends, as
// described in the Design document.
type S3LegacyLayout struct {
URL string
Path string
Join func(...string) string
}
var s3LayoutPaths = map[restic.FileType]string{
restic.PackFile: "data",
restic.SnapshotFile: "snapshot",
restic.IndexFile: "index",
restic.LockFile: "lock",
restic.KeyFile: "key",
}
func (l *S3LegacyLayout) String() string {
return "<S3LegacyLayout>"
}
// Name returns the name for this layout.
func (l *S3LegacyLayout) Name() string {
return "s3legacy"
}
// join calls Join with the first empty elements removed.
func (l *S3LegacyLayout) join(url string, items ...string) string {
for len(items) > 0 && items[0] == "" {
items = items[1:]
}
path := l.Join(items...)
if path == "" || path[0] != '/' {
if url != "" && url[len(url)-1] != '/' {
url += "/"
}
}
return url + path
}
// Dirname returns the directory path for a given file type and name.
func (l *S3LegacyLayout) Dirname(h restic.Handle) string {
if h.Type == restic.ConfigFile {
return l.URL + l.Join(l.Path, "/")
}
return l.join(l.URL, l.Path, s3LayoutPaths[h.Type]) + "/"
}
// Filename returns a path to a file, including its name.
func (l *S3LegacyLayout) Filename(h restic.Handle) string {
name := h.Name
if h.Type == restic.ConfigFile {
name = "config"
}
return l.join(l.URL, l.Path, s3LayoutPaths[h.Type], name)
}
// Paths returns all directory names
func (l *S3LegacyLayout) Paths() (dirs []string) {
for _, p := range s3LayoutPaths {
dirs = append(dirs, l.Join(l.Path, p))
}
return dirs
}
// Basedir returns the base dir name for type t.
func (l *S3LegacyLayout) Basedir(t restic.FileType) (dirname string, subdirs bool) {
return l.Join(l.Path, s3LayoutPaths[t]), false
}