support for shell expansions in nerd_tree command

src/tree.py

@@ -1,5 +1,7 @@
 import os
 import stat as _stat
+import fnmatch, re
+
 from pathlib import Path
 
 from src.colors import RED, YELLOW, GREEN, CYAN , BLUE, PURPLE
@@ -16,11 +18,33 @@ class NerdTree():
   def __init__(self, startpath='', opts={}):
     self.startpath = startpath
     self.opts = opts
+    '''
+      the below member contains regexp compiled for the items to exclude
+      the match in any of these regexp must cause the skip
+    '''
+    self.reobj_excludes = []
+    self.init_reobj_excludes()
     if startpath:
       self.json_tree = self.tree_struct(startpath)
     else:
       self.json_tree = {}
 
+  def init_reobj_excludes(self):
+    '''
+      it use bash expansion pattern to generate 
+      regexp to check for exclude items
+    '''
+    exclusions = self.opts.get('items_to_exclude') or []
+    if not exclusions:
+      return
+
+    for e in exclusions:
+      # for example e -> '*.txt'
+      regex = fnmatch.translate(e)
+      reobj = re.compile(regex)
+      self.reobj_excludes.append(reobj)
+
+
   def get_path_obj(self, abs_path_item):
     ## using lstat not produce error in case of symbolic link
     path_object = Path(abs_path_item)
@@ -65,6 +89,19 @@ class NerdTree():
 
     return os.listdir(startpath)
 
+  def test_exclude_true(self, item_name):
+    '''
+    @param               item_name          string - the name of file or folder
+    '''
+    if not self.reobj_excludes: 
+      return False
+
+    reobj_tests = list(map(lambda reobj: reobj.match(item_name) ,self.reobj_excludes))
+    if any(reobj_tests): 
+      return True
+
+    return False
+
   def colorize(self, d):
     '''
     use the mandatory key `type` to format item
@@ -138,7 +175,10 @@ class NerdTree():
       d.setdefault('not_readable', 1)
 
     for item in items:
-      if item in (self.opts.get('items_to_exclude') or []):
+      # if item in (self.opts.get('items_to_exclude') or []):
+      #   continue
+
+      if self.test_exclude_true(item):
         continue
 
       abs_path_item = startpath+item