Remove the storing of previous content.

While it is a nice idea, it adds too much to this feature.

Signed-off-by: Chris Lalancette <clalancette@openrobotics.org>

Author: clalancette

ros2topic/ros2topic/verb/pub.py

@@ -12,9 +12,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import hashlib
-import os
-import tempfile
 import time
 from typing import List, Optional, Tuple, TypeVar
 
@@ -164,19 +161,14 @@ def main(args) -> Optional[str]:
 
     if args.interactive:
         print('Interactive mode...')
-        # Read last message that was sent if it exists in temp
-        content = get_last_message_content(args.message_type)
         # Show the tui
-        orig_msg, orig_timestamp_fields = parse_msg(args.message_type, content)
-        default_msg, default_timestamp_fields = parse_msg(args.message_type)
-        content = show_interactive_tui(message_to_yaml(orig_msg), message_to_yaml(default_msg))
-        # Load msg YAML now to be sure it does not fail and we store a broken message
-        msg, timestamp_fields = parse_msg(args.message_type, content)
-        # Store the user input so we are able to load it the next time
-        store_message_content(args.message_type, content)
+        default_msg, default_timestamp_fields = parse_msg(args.message_type, args.values)
+        content = show_interactive_tui(message_to_yaml(default_msg))
     else:
-        # Parse the yaml string and get a message object of the desired type
-        msg, timestamp_fields = parse_msg(args.message_type, content)
+        content = args.values
+
+    # Parse the yaml string and get a message object of the desired type
+    msg, timestamp_fields = parse_msg(args.message_type, content)
 
     with DirectNode(args, node_name=args.node_name) as node:
         return publisher(
@@ -193,63 +185,7 @@ def main(args) -> Optional[str]:
             args.keep_alive)
 
 
-def get_history_file(msg_type: str) -> str:
-    """
-    Get paths for semi persistent history based on message name.
-
-    :param msg_type: Name of the message type
-    :returns: The path where a history file would be located if it exists
-    """
-    # Get temporary directory name
-    msg_history_cache_folder_path = os.path.join(
-        tempfile.gettempdir(), "ros_interactive_msg_cache")
-    # Create temporary history dir if needed
-    os.makedirs(msg_history_cache_folder_path, exist_ok=True)
-    # Create a file based on the message name
-    return os.path.join(
-        msg_history_cache_folder_path,
-        f'{hashlib.sha224(msg_type.encode()).hexdigest()[:20]}.yaml')
-
-
-def get_last_message_content(msg_type: str) -> str:
-    """
-    Retrieve the last message of the given type that was sent using the tui if it exists.
-
-    :param msg_type: Name of the message type
-    :returns: The YAML representation containing the last message or an empty dict
-    """
-    content = "{}"
-    try:
-        history_path = get_history_file(msg_type)
-        # Load previous values for that message type
-        if os.path.exists(history_path):
-            with open(history_path, 'r') as f:
-                content = f.read()
-    except OSError:
-        print('Unable load history...')
-    return content
-
-
-def store_message_content(msg_type: str, content: str) -> None:
-    """
-    Store the YAML for the current message in a semi persistent file.
-
-    :param msg_type: Name of the message type
-    :param content: The YAML entered by the user
-    """
-    try:
-        history_path = get_history_file(msg_type)
-        # Clear cache
-        if os.path.exists(history_path):
-            os.remove(history_path)
-        # Store last message in cache
-        with open(history_path, 'w') as f:
-            f.write(content)
-    except OSError:
-        print('Unable to store history')
-
-
-def show_interactive_tui(msg_str: str, default_msg_str: Optional[str] = None) -> str:
+def show_interactive_tui(default_msg_str: str) -> str:
     """
     Show a tui to edit a given message yaml.
 
@@ -263,17 +199,16 @@ def bottom_toolbar():
 
     # Create key bindings for the prompt
     bindings = KeyBindings()
-    if default_msg_str is not None:
-        @bindings.add('c-r')
-        def _(event):
-            """Reset the promt to the default message."""
-            event.app.current_buffer.text = default_msg_str
+    @bindings.add('c-r')
+    def _(event):
+        """Reset the promt to the default message."""
+        event.app.current_buffer.text = default_msg_str
 
     # Show prompt to edit the message before sending it
     return prompt(
         "> ",
         multiline=True,
-        default=msg_str,
+        default=default_msg_str,
         lexer=PygmentsLexer(YamlLexer),
         mouse_support=True,
         bottom_toolbar=bottom_toolbar,
@@ -304,6 +239,7 @@ def parse_msg(msg_type: str, yaml_values: Optional[str] = None) -> Tuple[MsgType
             raise RuntimeError('The passed value needs to be a dictionary in YAML format')
         # Set all fields in the message to the provided values
         try:
+            # Unfortunately, if you specifi
             timestamp_fields = set_message_fields(
                 msg, values_dictionary, expand_header_auto=True, expand_time_now=True)
         except Exception as e: