Add rclone backend

internal/backend/rclone/config.go

@@ -0,0 +1,36 @@
+package rclone
+
+import (
+	"strings"
+
+	"github.com/restic/restic/internal/errors"
+	"github.com/restic/restic/internal/options"
+)
+
+// Config contains all configuration necessary to start rclone.
+type Config struct {
+	Program string `option:"program" help:"path to rclone (default: rclone)"`
+	Args    string `option:"args"    help:"arguments for running rclone (default: restic serve --stdio)"`
+	Remote  string
+}
+
+func init() {
+	options.Register("rclone", Config{})
+}
+
+// NewConfig returns a new Config with the default values filled in.
+func NewConfig() Config {
+	return Config{}
+}
+
+// ParseConfig parses the string s and extracts the remote server URL.
+func ParseConfig(s string) (interface{}, error) {
+	if !strings.HasPrefix(s, "rclone:") {
+		return nil, errors.New("invalid rclone backend specification")
+	}
+
+	s = s[7:]
+	cfg := NewConfig()
+	cfg.Remote = s
+	return cfg, nil
+}