Moves files

internal/backend/sftp/config.go

@@ -0,0 +1,72 @@
+package sftp
+
+import (
+	"net/url"
+	"path"
+	"strings"
+
+	"restic/errors"
+	"restic/options"
+)
+
+// Config collects all information required to connect to an sftp server.
+type Config struct {
+	User, Host, Path string
+	Layout           string `option:"layout" help:"use this backend directory layout (default: auto-detect)"`
+	Command          string `option:"command" help:"specify command to create sftp connection"`
+}
+
+func init() {
+	options.Register("sftp", Config{})
+}
+
+// ParseConfig parses the string s and extracts the sftp config. The
+// supported configuration formats are sftp://user@host/directory
+//  and sftp:user@host:directory.  The directory will be path Cleaned and can
+//  be an absolute path if it starts with a '/' (e.g.
+//  sftp://user@host//absolute and sftp:user@host:/absolute).
+func ParseConfig(s string) (interface{}, error) {
+	var user, host, dir string
+	switch {
+	case strings.HasPrefix(s, "sftp://"):
+		// parse the "sftp://user@host/path" url format
+		url, err := url.Parse(s)
+		if err != nil {
+			return nil, errors.Wrap(err, "url.Parse")
+		}
+		if url.User != nil {
+			user = url.User.Username()
+		}
+		host = url.Host
+		dir = url.Path
+		if dir == "" {
+			return nil, errors.Errorf("invalid backend %q, no directory specified", s)
+		}
+
+		dir = dir[1:]
+	case strings.HasPrefix(s, "sftp:"):
+		// parse the sftp:user@host:path format, which means we'll get
+		// "user@host:path" in s
+		s = s[5:]
+		// split user@host and path at the colon
+		data := strings.SplitN(s, ":", 2)
+		if len(data) < 2 {
+			return nil, errors.New("sftp: invalid format, hostname or path not found")
+		}
+		host = data[0]
+		dir = data[1]
+		// split user and host at the "@"
+		data = strings.SplitN(host, "@", 2)
+		if len(data) == 2 {
+			user = data[0]
+			host = data[1]
+		}
+	default:
+		return nil, errors.New(`invalid format, does not start with "sftp:"`)
+	}
+	return Config{
+		User: user,
+		Host: host,
+		Path: path.Clean(dir),
+	}, nil
+}