adding ability to specify path for command tree

catcli/catcli.py

@@ -39,8 +39,9 @@ Usage:
     {1} ls    [--catalog=<path>] [-rV] [<path>]
     {1} find  [--catalog=<path>] [-sV] <term>
     {1} rm    [--catalog=<path>] [-fV] <storage>
-    {1} tree  [--catalog=<path>] [-V]
+    {1} tree  [--catalog=<path>] [-V] [<path>]
     {1} graph [--catalog=<path>] [-V] [<path>]
+    {1} help
     {1} --help
     {1} --version
 
@@ -113,7 +114,12 @@ def cmd_find(args, noder, top):
 
 
 def cmd_tree(args, noder, top):
-    noder.print_tree(top)
+    path = args['<path>']
+    node = top
+    if path:
+        node = noder.get_node(top, path)
+    if node:
+        noder.print_tree(node)
 
 
 def cmd_graph(args, noder, top):
@@ -132,6 +138,10 @@ def banner():
 def main():
     args = docopt(USAGE, version=VERSION)
 
+    if args['help']:
+        print(USAGE)
+        return True
+
     # print banner
     banner()
 

catcli/noder.py

@@ -42,6 +42,15 @@ class Noder:
         ''' return a list of all storage names '''
         return [x.name for x in list(top.children)]
 
+    def get_node(self, top, path):
+        ''' get the node at path '''
+        r = anytree.resolver.Resolver('name')
+        try:
+            return r.get(top, path)
+        except anytree.resolver.ChildResolverError:
+            Logger.err('No node at path \"{}\"'.format(path))
+            return None
+
     ###############################################################
     # node creationg
     ###############################################################