lsjson: add IsBucket field for bucket based remote listing of the root

cmd/lsjson/lsjson.go

@@ -42,13 +42,16 @@ The output is an array of Items, where each Item looks like this
       },
       "ID": "y2djkhiujf83u33",
       "OrigID": "UYOJVTUW00Q1RzTDA",
+      "IsBucket" : false,
       "IsDir" : false,
       "MimeType" : "application/octet-stream",
       "ModTime" : "2017-05-31T16:15:57.034468261+01:00",
       "Name" : "file.txt",
       "Encrypted" : "v0qpsdq8anpci8n929v3uu9338",
+      "EncryptedPath" : "kja9098349023498/v0qpsdq8anpci8n929v3uu9338",
       "Path" : "full/path/goes/here/file.txt",
-      "Size" : 6
+      "Size" : 6,
+      "Tier" : "hot",
    }
 
 If --hash is not specified the Hashes property won't be emitted.
@@ -66,6 +69,10 @@ If "remote:path" contains the file "subfolder/file.txt", the Path for "file.txt"
 will be "subfolder/file.txt", not "remote:path/subfolder/file.txt".
 When used without --recursive the Path will always be the same as Name.
 
+If the directory is a bucket in a bucket based backend, then
+"IsBucket" will be set to true. This key won't be present unless it is
+"true".
+
 The time is in RFC3339 format with up to nanosecond precision.  The
 number of decimal digits in the seconds will depend on the precision
 that the remote can hold the times, so if times are accurate to the

fs/operations/lsjson.go

@@ -24,6 +24,7 @@ type ListJSONItem struct {
 	ID            string            `json:",omitempty"`
 	OrigID        string            `json:",omitempty"`
 	Tier          string            `json:",omitempty"`
+	IsBucket      bool              `json:",omitempty"`
 }
 
 // Timestamp a time in the provided format
@@ -92,8 +93,10 @@ func ListJSON(fsrc fs.Fs, remote string, opt *ListJSONOpt, callback func(*ListJS
 			return errors.Wrap(err, "ListJSON failed to make new crypt remote")
 		}
 	}
-	canGetTier := fsrc.Features().GetTier
+	features := fsrc.Features()
+	canGetTier := features.GetTier
 	format := formatForPrecision(fsrc.Precision())
+	isBucket := features.BucketBased && remote == "" && fsrc.Root() == "" // if bucket based remote listing the root mark directories as buckets
 	err := walk.ListR(fsrc, remote, false, ConfigMaxDepth(opt.Recurse), walk.ListAll, func(entries fs.DirEntries) (err error) {
 		for _, entry := range entries {
 			switch entry.(type) {
@@ -152,6 +155,7 @@ func ListJSON(fsrc fs.Fs, remote string, opt *ListJSONOpt, callback func(*ListJS
 			switch x := entry.(type) {
 			case fs.Directory:
 				item.IsDir = true
+				item.IsBucket = isBucket
 			case fs.Object:
 				item.IsDir = false
 				if opt.ShowHash {

fs/operations/rc.go

@@ -30,7 +30,7 @@ The result is
 - list
     - This is an array of objects as described in the lsjson command
 
-See the lsjson command for more information on the above and examples.
+See the [lsjson command](/commands/rclone_lsjson/) for more information on the above and examples.
 `,
 	})
 }