fs: Add CanHaveEmptyDirectories and BucketBased feature flags to all remotes

amazonclouddrive/amazonclouddrive.go

@@ -190,7 +190,11 @@ func NewFs(name, root string) (fs.Fs, error) {
 		pacer:        pacer.New().SetMinSleep(minSleep).SetPacer(pacer.AmazonCloudDrivePacer),
 		noAuthClient: fs.Config.Client(),
 	}
-	f.features = (&fs.Features{CaseInsensitive: true, ReadMimeType: true}).Fill(f)
+	f.features = (&fs.Features{
+		CaseInsensitive:         true,
+		ReadMimeType:            true,
+		CanHaveEmptyDirectories: true,
+	}).Fill(f)
 
 	// Renew the token in the background
 	f.tokenRenewer = oauthutil.NewRenew(f.String(), ts, func() error {

azureblob/azureblob.go

@@ -214,7 +214,11 @@ func NewFs(name, root string) (fs.Fs, error) {
 		pacer:       pacer.New().SetMinSleep(minSleep).SetMaxSleep(maxSleep).SetDecayConstant(decayConstant),
 		uploadToken: pacer.NewTokenDispenser(fs.Config.Transfers),
 	}
-	f.features = (&fs.Features{ReadMimeType: true, WriteMimeType: true}).Fill(f)
+	f.features = (&fs.Features{
+		ReadMimeType:  true,
+		WriteMimeType: true,
+		BucketBased:   true,
+	}).Fill(f)
 	if f.root != "" {
 		f.root += "/"
 		// Check to see if the (container,directory) is actually an existing file

b2/b2.go

@@ -257,7 +257,11 @@ func NewFs(name, root string) (fs.Fs, error) {
 		pacer:        pacer.New().SetMinSleep(minSleep).SetMaxSleep(maxSleep).SetDecayConstant(decayConstant),
 		bufferTokens: make(chan []byte, fs.Config.Transfers),
 	}
-	f.features = (&fs.Features{ReadMimeType: true, WriteMimeType: true}).Fill(f)
+	f.features = (&fs.Features{
+		ReadMimeType:  true,
+		WriteMimeType: true,
+		BucketBased:   true,
+	}).Fill(f)
 	// Set the test flag if required
 	if *b2TestMode != "" {
 		testMode := strings.TrimSpace(*b2TestMode)

box/box.go

@@ -244,7 +244,10 @@ func NewFs(name, root string) (fs.Fs, error) {
 		pacer:       pacer.New().SetMinSleep(minSleep).SetMaxSleep(maxSleep).SetDecayConstant(decayConstant),
 		uploadToken: pacer.NewTokenDispenser(fs.Config.Transfers),
 	}
-	f.features = (&fs.Features{CaseInsensitive: true}).Fill(f)
+	f.features = (&fs.Features{
+		CaseInsensitive:         true,
+		CanHaveEmptyDirectories: true,
+	}).Fill(f)
 	f.srv.SetErrorHandler(errorHandler)
 
 	// Renew the token in the background

crypt/crypt.go

@@ -104,10 +104,12 @@ func NewFs(name, rpath string) (fs.Fs, error) {
 	// the features here are ones we could support, and they are
 	// ANDed with the ones from wrappedFs
 	f.features = (&fs.Features{
-		CaseInsensitive: mode == NameEncryptionOff,
-		DuplicateFiles:  true,
-		ReadMimeType:    false, // MimeTypes not supported with crypt
-		WriteMimeType:   false,
+		CaseInsensitive:         mode == NameEncryptionOff,
+		DuplicateFiles:          true,
+		ReadMimeType:            false, // MimeTypes not supported with crypt
+		WriteMimeType:           false,
+		BucketBased:             true,
+		CanHaveEmptyDirectories: true,
 	}).Fill(f).Mask(wrappedFs)
 	return f, err
 }

drive/drive.go

@@ -408,7 +408,12 @@ func NewFs(name, path string) (fs.Fs, error) {
 	}
 	f.teamDriveID = fs.ConfigFileGet(name, "team_drive")
 	f.isTeamDrive = f.teamDriveID != ""
-	f.features = (&fs.Features{DuplicateFiles: true, ReadMimeType: true, WriteMimeType: true}).Fill(f)
+	f.features = (&fs.Features{
+		DuplicateFiles:          true,
+		ReadMimeType:            true,
+		WriteMimeType:           true,
+		CanHaveEmptyDirectories: true,
+	}).Fill(f)
 
 	// Create a new authorized Drive client.
 	f.client = oAuthClient

dropbox/dropbox.go

@@ -185,7 +185,11 @@ func NewFs(name, root string) (fs.Fs, error) {
 		srv:   srv,
 		pacer: pacer.New().SetMinSleep(minSleep).SetMaxSleep(maxSleep).SetDecayConstant(decayConstant),
 	}
-	f.features = (&fs.Features{CaseInsensitive: true, ReadMimeType: true}).Fill(f)
+	f.features = (&fs.Features{
+		CaseInsensitive:         true,
+		ReadMimeType:            true,
+		CanHaveEmptyDirectories: true,
+	}).Fill(f)
 	f.setRoot(root)
 
 	// See if the root is actually an object

fs/fs.go

@@ -245,11 +245,13 @@ type ListRFn func(dir string, callback ListRCallback) error
 
 // Features describe the optional features of the Fs
 type Features struct {
-	// Feature flags
-	CaseInsensitive bool
-	DuplicateFiles  bool
-	ReadMimeType    bool
-	WriteMimeType   bool
+	// Feature flags, whether Fs
+	CaseInsensitive         bool // has case insensitive files
+	DuplicateFiles          bool // allows duplicate files
+	ReadMimeType            bool // can read the mime type of objects
+	WriteMimeType           bool // can set the mime type of objects
+	CanHaveEmptyDirectories bool // can have empty directories
+	BucketBased             bool // is bucket based (like s3, swift etc)
 
 	// Purge all files in the root and the root directory
 	//
@@ -444,6 +446,8 @@ func (ft *Features) Mask(f Fs) *Features {
 	ft.DuplicateFiles = ft.DuplicateFiles && mask.DuplicateFiles
 	ft.ReadMimeType = ft.ReadMimeType && mask.ReadMimeType
 	ft.WriteMimeType = ft.WriteMimeType && mask.WriteMimeType
+	ft.CanHaveEmptyDirectories = ft.CanHaveEmptyDirectories && mask.CanHaveEmptyDirectories
+	ft.BucketBased = ft.BucketBased && mask.BucketBased
 	if mask.Purge == nil {
 		ft.Purge = nil
 	}

ftp/ftp.go

@@ -207,7 +207,9 @@ func NewFs(name, root string) (ff fs.Fs, err error) {
 		pass:     pass,
 		dialAddr: dialAddr,
 	}
-	f.features = (&fs.Features{}).Fill(f)
+	f.features = (&fs.Features{
+		CanHaveEmptyDirectories: true,
+	}).Fill(f)
 	// Make a connection and pool it to return errors early
 	c, err := f.getFtpConnection()
 	if err != nil {

googlecloudstorage/googlecloudstorage.go

@@ -317,7 +317,11 @@ func NewFs(name, root string) (fs.Fs, error) {
 		location:      fs.ConfigFileGet(name, "location"),
 		storageClass:  fs.ConfigFileGet(name, "storage_class"),
 	}
-	f.features = (&fs.Features{ReadMimeType: true, WriteMimeType: true}).Fill(f)
+	f.features = (&fs.Features{
+		ReadMimeType:  true,
+		WriteMimeType: true,
+		BucketBased:   true,
+	}).Fill(f)
 	if f.objectACL == "" {
 		f.objectACL = "private"
 	}

http/http.go

@@ -151,7 +151,9 @@ func NewFs(name, root string) (fs.Fs, error) {
 		endpoint:    u,
 		endpointURL: u.String(),
 	}
-	f.features = (&fs.Features{}).Fill(f)
+	f.features = (&fs.Features{
+		CanHaveEmptyDirectories: true,
+	}).Fill(f)
 	if isFile {
 		return f, fs.ErrorIsFile
 	}

local/local.go

@@ -92,7 +92,10 @@ func NewFs(name, root string) (fs.Fs, error) {
 		dirNames: newMapper(),
 	}
 	f.root = f.cleanPath(root)
-	f.features = (&fs.Features{CaseInsensitive: f.caseInsensitive()}).Fill(f)
+	f.features = (&fs.Features{
+		CaseInsensitive:         f.caseInsensitive(),
+		CanHaveEmptyDirectories: true,
+	}).Fill(f)
 	if *followSymlinks {
 		f.lstat = os.Stat
 	}

onedrive/onedrive.go

@@ -205,7 +205,11 @@ func NewFs(name, root string) (fs.Fs, error) {
 		srv:   rest.NewClient(oAuthClient).SetRoot(rootURL),
 		pacer: pacer.New().SetMinSleep(minSleep).SetMaxSleep(maxSleep).SetDecayConstant(decayConstant),
 	}
-	f.features = (&fs.Features{CaseInsensitive: true, ReadMimeType: true}).Fill(f)
+	f.features = (&fs.Features{
+		CaseInsensitive:         true,
+		ReadMimeType:            true,
+		CanHaveEmptyDirectories: true,
+	}).Fill(f)
 	f.srv.SetErrorHandler(errorHandler)
 
 	// Renew the token in the background

qingstor/qingstor.go

@@ -240,7 +240,11 @@ func NewFs(name, root string) (fs.Fs, error) {
 		bucket: bucket,
 		svc:    svc,
 	}
-	f.features = (&fs.Features{ReadMimeType: true, WriteMimeType: true}).Fill(f)
+	f.features = (&fs.Features{
+		ReadMimeType:  true,
+		WriteMimeType: true,
+		BucketBased:   true,
+	}).Fill(f)
 
 	if f.root != "" {
 		if !strings.HasSuffix(f.root, "/") {

s3/s3.go

@@ -401,7 +401,11 @@ func NewFs(name, root string) (fs.Fs, error) {
 		sse:                fs.ConfigFileGet(name, "server_side_encryption"),
 		storageClass:       fs.ConfigFileGet(name, "storage_class"),
 	}
-	f.features = (&fs.Features{ReadMimeType: true, WriteMimeType: true}).Fill(f)
+	f.features = (&fs.Features{
+		ReadMimeType:  true,
+		WriteMimeType: true,
+		BucketBased:   true,
+	}).Fill(f)
 	if *s3ACL != "" {
 		f.acl = *s3ACL
 	}

sftp/sftp.go

@@ -290,7 +290,9 @@ func NewFs(name, root string) (fs.Fs, error) {
 		mkdirLock: newStringLock(),
 		connLimit: rate.NewLimiter(rate.Limit(connectionsPerSecond), 1),
 	}
-	f.features = (&fs.Features{}).Fill(f)
+	f.features = (&fs.Features{
+		CanHaveEmptyDirectories: true,
+	}).Fill(f)
 	// Make a connection and pool it to return errors early
 	c, err := f.getSftpConnection()
 	if err != nil {

swift/swift.go

@@ -200,7 +200,11 @@ func NewFsWithConnection(name, root string, c *swift.Connection) (fs.Fs, error)
 		segmentsContainer: container + "_segments",
 		root:              directory,
 	}
-	f.features = (&fs.Features{ReadMimeType: true, WriteMimeType: true}).Fill(f)
+	f.features = (&fs.Features{
+		ReadMimeType:  true,
+		WriteMimeType: true,
+		BucketBased:   true,
+	}).Fill(f)
 	// StorageURL overloading
 	storageURL := fs.ConfigFileGet(name, "storage_url")
 	if storageURL != "" {

yandex/yandex.go

@@ -133,7 +133,11 @@ func NewFs(name, root string) (fs.Fs, error) {
 		name: name,
 		yd:   yandexDisk,
 	}
-	f.features = (&fs.Features{ReadMimeType: true, WriteMimeType: true}).Fill(f)
+	f.features = (&fs.Features{
+		ReadMimeType:            true,
+		WriteMimeType:           true,
+		CanHaveEmptyDirectories: true,
+	}).Fill(f)
 	f.setRoot(root)
 
 	// Check to see if the object exists and is a file