dump: Add option to skip index dirs (#21501)

closes #20683

Add an option to gitea dump to skip the bleve indexes, which can become
quite large (in my case the same size as the repo's) and can be
regenerated after restore.

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: zeripath <art27@cantab.net>

cmd/dump.go

@@ -146,6 +146,10 @@ It can be used for backup and capture Gitea server image to send to maintainer`,
 			Name:  "skip-package-data",
 			Usage: "Skip package data",
 		},
+		cli.BoolFlag{
+			Name:  "skip-index",
+			Usage: "Skip bleve index data",
+		},
 		cli.GenericFlag{
 			Name:  "type",
 			Value: outputTypeEnum,
@@ -327,6 +331,11 @@ func runDump(ctx *cli.Context) error {
 			excludes = append(excludes, opts.ProviderConfig)
 		}
 
+		if ctx.IsSet("skip-index") && ctx.Bool("skip-index") {
+			excludes = append(excludes, setting.Indexer.RepoPath)
+			excludes = append(excludes, setting.Indexer.IssuePath)
+		}
+
 		excludes = append(excludes, setting.RepoRootPath)
 		excludes = append(excludes, setting.LFS.Path)
 		excludes = append(excludes, setting.Attachment.Path)