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// Package alias implements a virtual provider to rename existing remotes.
package alias
import (
"context"
"errors"
"strings"
"github.com/rclone/rclone/fs"
"github.com/rclone/rclone/fs/cache"
"github.com/rclone/rclone/fs/config/configmap"
"github.com/rclone/rclone/fs/config/configstruct"
"github.com/rclone/rclone/fs/fspath"
)
// Register with Fs
func init() {
fsi := &fs.RegInfo{
Name: "alias",
Description: "Alias for an existing remote",
NewFs: NewFs,
Options: []fs.Option{{
Name: "remote",
Help: "Remote or path to alias.\n\nCan be \"myremote:path/to/dir\", \"myremote:bucket\", \"myremote:\" or \"/local/path\".",
Required: true,
}},
}
fs.Register(fsi)
}
// Options defines the configuration for this backend
type Options struct {
Remote string `config:"remote"`
}
// NewFs constructs an Fs from the path.
//
// The returned Fs is the actual Fs, referenced by remote in the config
func NewFs(ctx context.Context, name, root string, m configmap.Mapper) (fs.Fs, error) {
// Parse config into Options struct
opt := new(Options)
err := configstruct.Set(m, opt)
if err != nil {
return nil, err
}
if opt.Remote == "" {
return nil, errors.New("alias can't point to an empty remote - check the value of the remote setting")
}
if strings.HasPrefix(opt.Remote, name+":") {
return nil, errors.New("can't point alias remote at itself - check the value of the remote setting")
}
return cache.Get(ctx, fspath.JoinRootPath(opt.Remote, root))
}
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