cmd and fs: Added new command settier which performs storage tier changes on

supported remotes

cmd/all/all.go

@@ -47,6 +47,7 @@ import (
 	_ "github.com/ncw/rclone/cmd/rmdir"
 	_ "github.com/ncw/rclone/cmd/rmdirs"
 	_ "github.com/ncw/rclone/cmd/serve"
+	_ "github.com/ncw/rclone/cmd/settier"
 	_ "github.com/ncw/rclone/cmd/sha1sum"
 	_ "github.com/ncw/rclone/cmd/size"
 	_ "github.com/ncw/rclone/cmd/sync"

cmd/settier/settier.go

@@ -0,0 +1,54 @@
+package settier
+
+import (
+	"github.com/ncw/rclone/cmd"
+	"github.com/ncw/rclone/fs/operations"
+	"github.com/pkg/errors"
+	"github.com/spf13/cobra"
+)
+
+func init() {
+	cmd.Root.AddCommand(commandDefintion)
+}
+
+var commandDefintion = &cobra.Command{
+	Use:   "settier tier remote:path",
+	Short: `Changes storage class/tier of objects in remote.`,
+	Long: `
+rclone settier changes storage tier or class at remote if supported.
+Few cloud storage services provides different storage classes on objects,
+for example AWS S3 and Glacier, Azure Blob storage - Hot, Cool and Archive,
+Google Cloud Storage, Regional Storage, Nearline, Coldline etc.
+
+Note that, certain tier chages make objects not available to access immediately.
+For example tiering to archive in azure blob storage makes objects in frozen state,
+user can restore by setting tier to Hot/Cool, similarly S3 to Glacier makes object
+inaccessible.true
+
+You can use it to tier single object
+
+    rclone settier Cool remote:path/file
+
+Or use rclone filters to set tier on only specific files
+
+	rclone --include "*.txt" settier Hot remote:path/dir
+
+Or just provide remote directory and all files in directory will be tiered
+
+    rclone settier tier remote:path/dir
+`,
+	Run: func(command *cobra.Command, args []string) {
+		cmd.CheckArgs(2, 2, command, args)
+		tier := args[0]
+		input := args[1:]
+		fsrc := cmd.NewFsSrc(input)
+		cmd.Run(false, false, command, func() error {
+			isSupported := fsrc.Features().SetTier
+			if !isSupported {
+				return errors.Errorf("Remote %s does not support settier", fsrc.Name())
+			}
+
+			return operations.SetTier(fsrc, tier)
+		})
+	},
+}

fs/operations/operations.go

@@ -1407,6 +1407,21 @@ func CopyFile(fdst fs.Fs, fsrc fs.Fs, dstFileName string, srcFileName string) (e
 	return moveOrCopyFile(fdst, fsrc, dstFileName, srcFileName, true)
 }
 
+// SetTier changes tier of object in remote
+func SetTier(fsrc fs.Fs, tier string) error {
+	return ListFn(fsrc, func(o fs.Object) {
+		objImpl, ok := o.(fs.SetTierer)
+		if !ok {
+			fs.Errorf(fsrc, "Remote object does not implement SetTier")
+			return
+		}
+		err := objImpl.SetTier(tier)
+		if err != nil {
+			fs.Errorf(fsrc, "Failed to do SetTier, %v", err)
+		}
+	})
+}
+
 // ListFormat defines files information print format
 type ListFormat struct {
 	separator string