fix(init): add sub commands (#3194)

cmd/admin/initialise/verify_database.go

@@ -0,0 +1,54 @@
+package initialise
+
+import (
+	"database/sql"
+
+	"github.com/caos/logging"
+	"github.com/caos/zitadel/internal/database"
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+)
+
+func newDatabase() *cobra.Command {
+	return &cobra.Command{
+		Use:   "database",
+		Short: "initialize only the database",
+		Long: `Sets up the ZITADEL database.
+
+Prereqesits:
+- cockroachdb
+
+The user provided by flags needs priviledge to 
+- create the database if it does not exist
+- see other users and create a new one if the user does not exist
+- grant all rights of the ZITADEL database to the user created if not yet set
+`,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			config := new(Config)
+			if err := viper.Unmarshal(config); err != nil {
+				return err
+			}
+			return initialise(config, verifyDB)
+		},
+	}
+}
+
+func verifyDB(db *sql.DB, config database.Config) error {
+	logging.Info("verify database")
+	exists, err := existsDatabase(db, config)
+	if exists || err != nil {
+		return err
+	}
+	return createDatabase(db, config)
+}
+
+func existsDatabase(db *sql.DB, config database.Config) (exists bool, err error) {
+	row := db.QueryRow("SELECT EXISTS(SELECT database_name FROM [show databases] WHERE database_name = $1)", config.Database)
+	err = row.Scan(&exists)
+	return exists, err
+}
+
+func createDatabase(db *sql.DB, config database.Config) error {
+	_, err := db.Exec("CREATE DATABASE " + config.Database)
+	return err
+}