do not depend on fusepy and pyfzf

catcli/catcli.py

@@ -23,7 +23,6 @@ from catcli.catalog import Catalog
 from catcli.walker import Walker
 from catcli.noder import Noder
 from catcli.utils import ask, edit, path_to_search_all
-from catcli.fuser import Fuser
 from catcli.exceptions import BadFormatException, CatcliException
 
 NAME = 'catcli'
@@ -82,12 +81,18 @@ Options:
 
 def cmd_mount(args: Dict[str, Any],
               top: NodeTop,
-              noder: Noder) -> None:
+              noder: Noder) -> bool:
     """mount action"""
     mountpoint = args['<mountpoint>']
     debug = args['--verbose']
-    Fuser(mountpoint, top, noder,
-          debug=debug)
+    try:
+        from catcli.fuser import Fuser  # pylint: disable=C0415
+        Fuser(mountpoint, top, noder,
+              debug=debug)
+    except ModuleNotFoundError:
+        Logger.err('install fusepy to use mount')
+        return False
+    return True
 
 
 def cmd_index(args: Dict[str, Any],
@@ -346,7 +351,8 @@ def main() -> bool:
             if not catalog.exists():
                 Logger.err(f'no such catalog: {catalog_path}')
                 return False
-            cmd_mount(args, top, noder)
+            if not cmd_mount(args, top, noder):
+                return False
         elif args['rm']:
             if not catalog.exists():
                 Logger.err(f'no such catalog: {catalog_path}')

catcli/fuser.py

@@ -9,7 +9,10 @@ import os
 from time import time
 from stat import S_IFDIR, S_IFREG
 from typing import List, Dict, Any, Optional
-import fuse  # type: ignore
+try:
+    import fuse  # type: ignore
+except ModuleNotFoundError:
+    pass
 
 # local imports
 from catcli.noder import Noder

catcli/noder.py

@@ -10,7 +10,6 @@ import shutil
 import time
 from typing import List, Union, Tuple, Any, Optional, Dict, cast
 import anytree  # type: ignore
-from pyfzf.pyfzf import FzfPrompt  # type: ignore
 
 # local imports
 from catcli import nodes
@@ -506,10 +505,15 @@ class Noder:
 
     @staticmethod
     def _fzf_prompt(strings: Any) -> Any:
-        # prompt with fzf
-        fzf = FzfPrompt()
-        selected = fzf.prompt(strings)
-        return selected
+        """prompt with fzf"""
+        try:
+            from pyfzf.pyfzf import FzfPrompt  # type: ignore # pylint: disable=C0415 # noqa
+            fzf = FzfPrompt()
+            selected = fzf.prompt(strings)
+            return selected
+        except ModuleNotFoundError:
+            Logger.err('install pyfzf to use fzf')
+            return None
 
     def _to_fzf(self, node: NodeAny, fmt: str) -> None:
         """