cli: refactor to allow definition of subcommands next to their implementation

daemon/main.go

@@ -1,7 +1,16 @@
 package daemon
 
 import (
+	"github.com/zrepl/zrepl/cli"
 	"github.com/zrepl/zrepl/logger"
 )
 
 type Logger = logger.Logger
+
+var DaemonCmd = &cli.Subcommand {
+	Use:   "daemon",
+	Short: "run the zrepl daemon",
+	Run: func(subcommand *cli.Subcommand, args []string) error {
+		return Run(subcommand.Config())
+	},
+}