refactor(stacks): extract auto update logic [EE-4945] (#8545)

api/git/backup.go

@@ -0,0 +1,62 @@
+package git
+
+import (
+	"fmt"
+
+	"github.com/pkg/errors"
+	portainer "github.com/portainer/portainer/api"
+	"github.com/portainer/portainer/api/filesystem"
+	gittypes "github.com/portainer/portainer/api/git/types"
+	"github.com/rs/zerolog/log"
+)
+
+var (
+	ErrInvalidGitCredential = errors.New("Invalid git credential")
+)
+
+type CloneOptions struct {
+	ProjectPath   string
+	URL           string
+	ReferenceName string
+	Username      string
+	Password      string
+}
+
+func CloneWithBackup(gitService portainer.GitService, fileService portainer.FileService, options CloneOptions) (clean func(), err error) {
+	backupProjectPath := fmt.Sprintf("%s-old", options.ProjectPath)
+	cleanUp := false
+	cleanFn := func() {
+		if !cleanUp {
+			return
+		}
+
+		err = fileService.RemoveDirectory(backupProjectPath)
+		if err != nil {
+			log.Warn().Err(err).Msg("unable to remove git repository directory")
+		}
+	}
+
+	err = filesystem.MoveDirectory(options.ProjectPath, backupProjectPath)
+	if err != nil {
+		return cleanFn, errors.WithMessage(err, "Unable to move git repository directory")
+	}
+
+	cleanUp = true
+
+	err = gitService.CloneRepository(options.ProjectPath, options.URL, options.ReferenceName, options.Username, options.Password)
+	if err != nil {
+		cleanUp = false
+		restoreError := filesystem.MoveDirectory(backupProjectPath, options.ProjectPath)
+		if restoreError != nil {
+			log.Warn().Err(restoreError).Msg("failed restoring backup folder")
+		}
+
+		if err == gittypes.ErrAuthenticationFailure {
+			return cleanFn, errors.WithMessage(err, ErrInvalidGitCredential.Error())
+		}
+
+		return cleanFn, errors.WithMessage(err, "Unable to clone git repository")
+	}
+
+	return cleanFn, nil
+}