Add database command

- Allows to override the system db and create/remove entries as desired.
  The input format is the same metadata as the one generated by the
  artifacts. It contains the Package and the file list that we need.
- Add integration test

Closes #47

cmd/database.go

@@ -0,0 +1,37 @@
+// Copyright © 2019 Ettore Di Giacinto <mudler@gentoo.org>
+//                  Daniele Rondina <geaaru@sabayonlinux.org>
+//
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 2 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with this program; if not, see <http://www.gnu.org/licenses/>.
+
+package cmd
+
+import (
+	. "github.com/mudler/luet/cmd/database"
+
+	"github.com/spf13/cobra"
+)
+
+var databaseGroupCmd = &cobra.Command{
+	Use:   "database [command] [OPTIONS]",
+	Short: "Manage system database (dangerous commands ahead!)",
+}
+
+func init() {
+	RootCmd.AddCommand(databaseGroupCmd)
+
+	databaseGroupCmd.AddCommand(
+		NewDatabaseCreateCommand(),
+		NewDatabaseRemoveCommand(),
+	)
+}