bug fix for dump when data directoryis not exist (#1025)

cmd/dump.go

@@ -17,6 +17,7 @@ import (
 	"code.gitea.io/gitea/models"
 	"code.gitea.io/gitea/modules/setting"
 	"github.com/Unknwon/cae/zip"
+	"github.com/Unknwon/com"
 	"github.com/urfave/cli"
 )
 
@@ -114,7 +115,9 @@ func runDump(ctx *cli.Context) error {
 		log.Printf("Custom dir %s doesn't exist, skipped", setting.CustomPath)
 	}
 
+	if com.IsExist(setting.AppDataPath) {
 		log.Printf("Packing data directory...%s", setting.AppDataPath)
+
 		var sessionAbsPath string
 		if setting.SessionConfig.Provider == "file" {
 			if len(setting.SessionConfig.ProviderConfig) == 0 {
@@ -122,10 +125,10 @@ func runDump(ctx *cli.Context) error {
 			}
 			sessionAbsPath, _ = filepath.Abs(setting.SessionConfig.ProviderConfig)
 		}
-
 		if err := zipAddDirectoryExclude(z, "data", setting.AppDataPath, sessionAbsPath); err != nil {
 			log.Fatalf("Failed to include data directory: %v", err)
 		}
+	}
 
 	if err := z.AddDir("log", setting.LogRootPath); err != nil {
 		log.Fatalf("Failed to include log: %v", err)