rclone/backend/alias/alias.go

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package alias
import (
"errors"
"path"
"path/filepath"
"strings"
"github.com/ncw/rclone/fs"
"github.com/ncw/rclone/fs/config"
)
// Register with Fs
func init() {
fsi := &fs.RegInfo{
Name: "alias",
Description: "Alias for a existing remote",
NewFs: NewFs,
Options: []fs.Option{{
Name: "remote",
Help: "Remote or path to alias.\nCan be \"myremote:path/to/dir\", \"myremote:bucket\", \"myremote:\" or \"/local/path\".",
}},
}
fs.Register(fsi)
}
// NewFs contstructs an Fs from the path.
//
// The returned Fs is the actual Fs, referenced by remote in the config
func NewFs(name, root string) (fs.Fs, error) {
remote := config.FileGet(name, "remote")
if remote == "" {
return nil, errors.New("alias can't point to an empty remote - check the value of the remote setting")
}
if strings.HasPrefix(remote, name+":") {
return nil, errors.New("can't point alias remote at itself - check the value of the remote setting")
}
fsInfo, configName, fsPath, err := fs.ParseRemote(remote)
if err != nil {
return nil, err
}
root = filepath.ToSlash(root)
return fsInfo.NewFs(configName, path.Join(fsPath, root))
}