Function touchFiles

cmd/bisync/bisync_test.go:1373–1433

touchFiles sets modification time on a group of files. Returns names of touched files and/or error. Note: `rclone touch` can touch only single file, doesn't support filters.

(ctx context.Context, dateStr string, f fs.Fs, dir, glob string)

// Returns names of touched files and/or error.
// Note: `rclone touch` can touch only single file, doesn't support filters.
func touchFiles(ctx context.Context, dateStr string, f fs.Fs, dir, glob string) ([]string, error) {
	files := []string{}
	if f.Precision() == fs.ModTimeNotSupported {
		return files, nil
	}

	date, err := time.ParseInLocation(touchDateFormat, dateStr, bisync.TZ)
	if err != nil {
		return files, fmt.Errorf("invalid date %q: %w", dateStr, err)
	}

	matcher, firstErr := filter.GlobPathToRegexp(glob, false)
	if firstErr != nil {
		return files, fmt.Errorf("invalid glob %q", glob)
	}

	entries, firstErr := f.List(ctx, "")
	if firstErr != nil {
		return files, firstErr
	}

	for _, entry := range entries {
		obj, isFile := entry.(fs.Object)
		if !isFile {
			continue
		}
		remote := obj.Remote()
		if !matcher.MatchString(remote) {
			continue
		}
		files = append(files, dir+remote)

		fs.Debugf(obj, "Set modification time %s", dateStr)
		err := obj.SetModTime(ctx, date)
		if err == fs.ErrorCantSetModTimeWithoutDelete || err == fs.ErrorCantSetModTime {
			// Workaround for dropbox, similar to --refresh-times
			err = nil
			buf := new(bytes.Buffer)
			size := obj.Size()
			separator := ""
			if size > 0 {
				filterCtx, fi := filter.AddConfig(ctx)
				err = fi.AddFile(remote) // limit Cat to only this file, not all files in dir
				if err != nil {
					return files, err
				}
				err = operations.Cat(filterCtx, f, buf, 0, size, []byte(separator))
			}
			info := object.NewStaticObjectInfo(remote, date, size, true, nil, f)
			if err == nil {
				_ = obj.Remove(ctx)
				_, err = f.Put(ctx, buf, info)
			}
		}
		if firstErr == nil {
			firstErr = err
		}
	}