added ability to add contexts/state to commands

Author: chronologos

awsshell/app.py

@@ -233,6 +233,7 @@ def __init__(self, completer, model_completer, docs):
         self._dot_cmd = DotCommandHandler()
         self._env = os.environ.copy()
         self._profile = None
+        self.prompt_tokens = u'aws> '
 
         # These attrs come from the config file.
         self.config_obj = None
@@ -279,7 +280,10 @@ def run(self):
         while True:
             try:
                 document = self.cli.run(reset_current_buffer=True)
-                text = document.text
+                if self.model_completer.context and isinstance(self.model_completer.context, list):
+                    text = " ".join(self.model_completer.context) + " " + document.text
+                else:
+                    text = document.text
             except InputInterrupt:
                 pass
             except (KeyboardInterrupt, EOFError):
@@ -297,6 +301,25 @@ def run(self):
                     if text.startswith('!'):
                         # Then run the rest as a normally shell command.
                         full_cmd = text[1:]
+                    elif text.startswith('@') and len(text.split()) == 1:
+                        # Add word as context to completions
+                        self.model_completer.context.append(text.split()[0].strip('@'))
+                        self.model_completer.reset()
+                        self.prompt_tokens = u'aws ' + ' '.join(self.model_completer.context) + u' > '
+                        self.refresh_cli = True
+                        self.cli.request_redraw()
+                        continue
+                    elif 'exit' in text.split():
+                        # Remove most recently added context
+                        if self.model_completer.context:
+                            self.model_completer.context.pop()
+                            if self.model_completer.context:
+                                self.prompt_tokens = u'aws ' + ' '.join(self.model_completer.context) + u' > '
+                            else:
+                                self.prompt_tokens = u'aws > '
+                            self.refresh_cli = True
+                            self.cli.request_redraw()
+                        continue
                     else:
                         full_cmd = 'aws ' + text
                         self.history.append(full_cmd)
@@ -328,7 +351,7 @@ def create_layout(self, display_completions_in_columns, toolbar):
         if self.config_section['theme'] == 'none':
             lexer = None
         return create_default_layout(
-            self, u'aws> ', lexer=lexer, reserve_space_for_menu=True,
+            self, self.prompt_tokens, lexer=lexer, reserve_space_for_menu=True,
             display_completions_in_columns=display_completions_in_columns,
             get_bottom_toolbar_tokens=toolbar.handler)
 

awsshell/autocomplete.py

@@ -24,6 +24,7 @@ def __init__(self, index_data, match_fuzzy=True):
         # This will get populated as a command is completed.
         self.cmd_path = [self._current_name]
         self.match_fuzzy = match_fuzzy
+        self.context = []
         self._cache_all_args = []
 
     @property
@@ -43,6 +44,15 @@ def reset(self):
         self._last_position = 0
         self.last_option = ''
         self.cmd_path = [self._current_name]
+        for context in self.context:
+            next_command = self._current['children'].get(context)
+            if not next_command:
+                self.context.remove(context)
+                self.reset()
+                return
+            self._current = next_command
+            self._current_name = context
+            self.cmd_path.append(self._current_name)
         self._cache_all_args = []
 
     def autocomplete(self, line):

tests/unit/test_autocomplete.py

@@ -380,3 +380,31 @@ def test_global_arg_metadata_property(index_data):
     }
     completer = AWSCLIModelCompleter(index_data)
     assert '--global1' in completer.global_arg_metadata
+
+def test_add_context_changes_context(index_data):
+    index_data['aws']['commands'] = ['ec2']
+    index_data['aws']['children'] = {
+        'ec2': {
+            'commands': ['create-tags'],
+            'argument_metadata': {},
+            'arguments': [],
+            'children': {
+                'create-tags': {
+                    'commands': [],
+                    'argument_metadata': {
+                        '--resources': {'example': '', 'minidoc': 'foo'},
+                    },
+                    'arguments': ['--resources'],
+                    'children': {},
+                }
+            }
+        }
+    }
+    completer = AWSCLIModelCompleter(index_data)
+    completer.reset()
+    completer.autocomplete('c')
+    assert completer.autocomplete('c') == ['ec2']
+    completer.context = ['ec2']
+    completer.reset()
+    completer.autocomplete('c')
+    assert completer.autocomplete('c') == ['create-tags']