rclone: Make concurrent connections configurable

internal/backend/rclone/backend.go

@@ -212,7 +212,7 @@ func Open(cfg Config) (*Backend, error) {
 	}
 
 	restConfig := rest.Config{
-		Connections: 20,
+		Connections: cfg.Connections,
 		URL:         url,
 	}
 

internal/backend/rclone/config.go

@@ -9,9 +9,10 @@ import (
 
 // 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: serve restic --stdio)"`
-	Remote  string
+	Program     string `option:"program" help:"path to rclone (default: rclone)"`
+	Args        string `option:"args"    help:"arguments for running rclone (default: serve restic --stdio)"`
+	Remote      string
+	Connections uint `option:"connections" help:"set a limit for the number of concurrent connections (default: 5)"`
 }
 
 func init() {
@@ -20,7 +21,9 @@ func init() {
 
 // NewConfig returns a new Config with the default values filled in.
 func NewConfig() Config {
-	return Config{}
+	return Config{
+		Connections: 5,
+	}
 }
 
 // ParseConfig parses the string s and extracts the remote server URL.

internal/backend/rclone/config_test.go

@@ -13,7 +13,8 @@ func TestParseConfig(t *testing.T) {
 		{
 			"rclone:local:foo:/bar",
 			Config{
-				Remote: "local:foo:/bar",
+				Remote:      "local:foo:/bar",
+				Connections: 5,
 			},
 		},
 	}