lsf: add --files-only and --dirs-only flags

cmd/lsf/lsf.go

@@ -18,6 +18,8 @@ var (
 	dirSlash  bool
 	recurse   bool
 	hashType  = fs.HashMD5
+	filesOnly bool
+	dirsOnly  bool
 )
 
 func init() {
@@ -27,6 +29,8 @@ func init() {
 	flags.StringVarP(&separator, "separator", "s", ";", "Separator for the items in the format.")
 	flags.BoolVarP(&dirSlash, "dir-slash", "d", true, "Append a slash to directory names.")
 	flags.VarP(&hashType, "hash", "", "Use this hash when `h` is used in the format MD5|SHA-1|DropboxHash")
+	flags.BoolVarP(&filesOnly, "files-only", "", false, "Only list files.")
+	flags.BoolVarP(&dirsOnly, "dirs-only", "", false, "Only list directories.")
 	commandDefintion.Flags().BoolVarP(&recurse, "recursive", "R", false, "Recurse into the listing.")
 }
 
@@ -58,6 +62,12 @@ can be returned as an empty string if it isn't available on the object
 the object and "UNSUPPORTED" if that object does not support that hash
 type.
 
+For example to emulate the md5sum command you can use
+
+    rclone lsf -R --hash MD5 --format hp --separator "  " --files-only .
+
+(Though "rclone md5sum ." is an easier way of typing this.)
+
 By default the separator is ";" this can be changed with the
 --separator flag.  Note that separators aren't escaped in the path so
 putting it last is a good strategy.
@@ -100,6 +110,16 @@ func Lsf(fsrc fs.Fs, out io.Writer) error {
 			return nil
 		}
 		for _, entry := range entries {
+			_, isDir := entry.(fs.Directory)
+			if isDir {
+				if filesOnly {
+					continue
+				}
+			} else {
+				if dirsOnly {
+					continue
+				}
+			}
 			fmt.Fprintln(out, fs.ListFormatted(&entry, &list))
 		}
 		return nil

cmd/lsf/lsf_test.go

@@ -112,6 +112,26 @@ subdir
 ;subdir
 `, buf.String())
 
+	buf = new(bytes.Buffer)
+	format = "p"
+	filesOnly = true
+	err = Lsf(f, buf)
+	require.NoError(t, err)
+	assert.Equal(t, `file1
+file2
+file3
+`, buf.String())
+	filesOnly = false
+
+	buf = new(bytes.Buffer)
+	format = "p"
+	dirsOnly = true
+	err = Lsf(f, buf)
+	require.NoError(t, err)
+	assert.Equal(t, `subdir
+`, buf.String())
+	dirsOnly = false
+
 	buf = new(bytes.Buffer)
 	format = "t"
 	err = Lsf(f, buf)