Add touch command - fixes #1594

cmd/all/all.go

@@ -43,6 +43,7 @@ import (
 	_ "github.com/ncw/rclone/cmd/sha1sum"
 	_ "github.com/ncw/rclone/cmd/size"
 	_ "github.com/ncw/rclone/cmd/sync"
+	_ "github.com/ncw/rclone/cmd/touch"
 	_ "github.com/ncw/rclone/cmd/tree"
 	_ "github.com/ncw/rclone/cmd/version"
 )

cmd/touch/touch.go

@@ -0,0 +1,71 @@
+package touch
+
+import (
+	"bytes"
+	"time"
+
+	"github.com/ncw/rclone/cmd"
+	"github.com/ncw/rclone/fs"
+	"github.com/pkg/errors"
+	"github.com/spf13/cobra"
+)
+
+var (
+	notCreateNewFile bool
+	timeAsArgument   string
+)
+
+const defaultLayout string = "060102"
+const layoutDateWithTime = "2006-01-02T15:04:05"
+
+func init() {
+	cmd.Root.AddCommand(commandDefintion)
+	flags := commandDefintion.Flags()
+	flags.BoolVarP(&notCreateNewFile, "no-create", "C", false, "Do not create the file if it does not exist.")
+	flags.StringVarP(&timeAsArgument, "timestamp", "t", "", "Change the modification times to the specified time instead of the current time of day. The argument is of the form 'YYMMDD' (ex. 17.10.30) or 'YYYY-MM-DDTHH:MM:SS' (ex. 2006-01-02T15:04:05)")
+}
+
+var commandDefintion = &cobra.Command{
+	Use:   "touch remote:path",
+	Short: `Create new file or change file modification time.`,
+	Run: func(command *cobra.Command, args []string) {
+		cmd.CheckArgs(1, 1, command, args)
+		fsrc, srcFileName := cmd.NewFsDstFile(args)
+		cmd.Run(true, false, command, func() error {
+			return Touch(fsrc, srcFileName)
+		})
+	},
+}
+
+//Touch create new file or change file modification time.
+func Touch(fsrc fs.Fs, srcFileName string) error {
+	timeAtr := time.Now()
+	if timeAsArgument != "" {
+		layout := defaultLayout
+		if len(timeAsArgument) == len(layoutDateWithTime) {
+			layout = layoutDateWithTime
+		}
+		timeAtrFromFlags, err := time.Parse(layout, timeAsArgument)
+		if err != nil {
+			return errors.Wrap(err, "failed to parse date/time argument")
+		}
+		timeAtr = timeAtrFromFlags
+	}
+	file, err := fsrc.NewObject(srcFileName)
+	if err != nil {
+		if !notCreateNewFile {
+			var buffer []byte
+			src := fs.NewStaticObjectInfo(srcFileName, timeAtr, int64(len(buffer)), true, nil, fsrc)
+			_, err = fsrc.Put(bytes.NewBuffer(buffer), src)
+			if err != nil {
+				return err
+			}
+		}
+		return nil
+	}
+	err = file.SetModTime(timeAtr)
+	if err != nil {
+		return errors.Wrap(err, "touch: couldn't set mod time")
+	}
+	return nil
+}

cmd/touch/touch_test.go

@@ -0,0 +1,61 @@
+package touch
+
+import (
+	"testing"
+	"time"
+
+	"github.com/ncw/rclone/fs"
+	"github.com/ncw/rclone/fstest"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+
+	_ "github.com/ncw/rclone/local"
+)
+
+func TestTouch(t *testing.T) {
+	fstest.Initialise()
+	f, err := fs.NewFs("testfiles")
+	err = Touch(f, "newFile")
+	require.NoError(t, err)
+	file, errFile := f.NewObject("newFile")
+	require.NoError(t, errFile)
+	err = file.Remove()
+	require.NoError(t, err)
+
+	notCreateNewFile = true
+	err = Touch(f, "fileWithCflag")
+	require.NoError(t, err)
+	file, errFile = f.NewObject("fileWithCflag")
+	require.Error(t, errFile)
+	notCreateNewFile = false
+
+	timeAsArgument = "060102"
+	err = Touch(f, "oldFile")
+	require.NoError(t, err)
+	file, err = f.NewObject("oldFile")
+	require.NoError(t, err)
+	curretTime := time.Now()
+	require.NoError(t, err)
+	print(file.ModTime().Year() < curretTime.Year())
+	assert.Equal(t, true, file.ModTime().Year() < curretTime.Year())
+	err = file.Remove()
+	require.NoError(t, err)
+
+	timeAsArgument = "2006-01-02T15:04:05"
+	err = Touch(f, "oldFile")
+	require.NoError(t, err)
+	file, err = f.NewObject("oldFile")
+	require.NoError(t, err)
+	assert.Equal(t, true, file.ModTime().Year() < curretTime.Year())
+
+	timeAsArgument = ""
+	err = Touch(f, "oldFile")
+	require.NoError(t, err)
+	file, err = f.NewObject("oldFile")
+	require.NoError(t, err)
+	timeBetween2007YearAndCurrent, errTime := time.Parse("060102", "121212")
+	require.NoError(t, errTime)
+	assert.Equal(t, true, file.ModTime().Year() > timeBetween2007YearAndCurrent.Year())
+	err = file.Remove()
+	require.NoError(t, err)
+}