Add auto completion via argcomplete

Author: willemt

cliar/cliar.py

@@ -4,6 +4,8 @@
 from collections import OrderedDict
 from typing import List, Iterable, Callable, Set, Type, get_type_hints
 
+import argcomplete
+
 from .utils import ignore
 
 
@@ -277,6 +279,8 @@ def _register_commands(self, handlers: Iterable[Callable]):
     def parse(self):
         '''Parse commandline input, i.e. launch the CLI.'''
 
+        argcomplete.autocomplete(self._parser)
+
         args = self._parser.parse_args()
 
         command = args._command

poetry.lock

@@ -12,6 +12,7 @@ keywords = ["cli", "commandline"]
 
 [tool.poetry.dependencies]
 python = "^3.6"
+argcomplete = "^1.12.0"
 
 [tool.poetry.dev-dependencies]
 pytest = "^3.5"