move SFTPGo package to the internal folder

SFTPGo is a daemon and command line tool, not a library.

The public API are provided by the SDK

Signed-off-by: Nicola Murino <nicola.murino@gmail.com>

internal/cmd/revertprovider.go

@@ -0,0 +1,77 @@
+// Copyright (C) 2019-2022  Nicola Murino
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published
+// by the Free Software Foundation, version 3.
+//
+// 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 Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package cmd
+
+import (
+	"os"
+
+	"github.com/rs/zerolog"
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+
+	"github.com/drakkan/sftpgo/v2/internal/config"
+	"github.com/drakkan/sftpgo/v2/internal/dataprovider"
+	"github.com/drakkan/sftpgo/v2/internal/logger"
+	"github.com/drakkan/sftpgo/v2/internal/util"
+)
+
+var (
+	revertProviderTargetVersion int
+	revertProviderCmd           = &cobra.Command{
+		Use:   "revertprovider",
+		Short: "Revert the configured data provider to a previous version",
+		Long: `This command reads the data provider connection details from the specified
+configuration file and restore the provider schema and/or data to a previous version.
+This command is not supported for the memory provider.
+
+Please take a look at the usage below to customize the options.`,
+		Run: func(_ *cobra.Command, _ []string) {
+			logger.DisableLogger()
+			logger.EnableConsoleLogger(zerolog.DebugLevel)
+			if revertProviderTargetVersion != 19 {
+				logger.WarnToConsole("Unsupported target version, 19 is the only supported one")
+				os.Exit(1)
+			}
+			configDir = util.CleanDirInput(configDir)
+			err := config.LoadConfig(configDir, configFile)
+			if err != nil {
+				logger.WarnToConsole("Unable to initialize data provider, config load error: %v", err)
+				os.Exit(1)
+			}
+			kmsConfig := config.GetKMSConfig()
+			err = kmsConfig.Initialize()
+			if err != nil {
+				logger.ErrorToConsole("unable to initialize KMS: %v", err)
+				os.Exit(1)
+			}
+			providerConf := config.GetProviderConf()
+			logger.InfoToConsole("Reverting provider: %#v config file: %#v target version %v", providerConf.Driver,
+				viper.ConfigFileUsed(), revertProviderTargetVersion)
+			err = dataprovider.RevertDatabase(providerConf, configDir, revertProviderTargetVersion)
+			if err != nil {
+				logger.WarnToConsole("Error reverting provider: %v", err)
+				os.Exit(1)
+			}
+			logger.InfoToConsole("Data provider successfully reverted")
+		},
+	}
+)
+
+func init() {
+	addConfigFlags(revertProviderCmd)
+	revertProviderCmd.Flags().IntVar(&revertProviderTargetVersion, "to-version", 19, `19 means the version supported in v2.3.x`)
+
+	rootCmd.AddCommand(revertProviderCmd)
+}