restarting tmux sessions on page load.

CHANGELOG.md

@@ -10,10 +10,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Fixed
 - default config: mandatory fields cannot be set in the yaml, or they
 might persist although the user sets them. moved to config loading in python.
+- tmux session now restarts on page load if it is not alive.
+- navbar, tags, inbox are now more friendly for mobile
 
 ### Added
 - Backend to get cover art from metadata of music files.
-- Impoved library view (friendlier for mobile, and a browser header component)
+- Impoved library view (mobile friendly, and a browser header component)
 - Library search
 
 ### Changed

README.md

@@ -118,7 +118,6 @@ To access the tmux from the host:
 ```
 docker exec -it beets-flask /usr/bin/tmux attach-session -t beets-socket-term
 ```
-Beware, you can close the tmux session, and we have not yet implemented a way to restart it. (Just restart the container)
 
 If you use iTerm on macOS and want to create a profile for connecting to the tmux session natively:
 ```

backend/beets_flask/terminal.py

@@ -48,11 +48,23 @@ def register_tmux():
     pane = window.active_pane or window.split_window(attach=True)
 
 
+def is_session_alive():
+    try:
+        if len(session.windows) > 0:  # type: ignore
+            # session.windows should raise if the session is not alive.
+            return True
+        else:
+            return False
+    except:
+        return False
+
+
 def emit_output():
     try:
-        # this approach to capture screen content keeps extra whitespaces, but we can
-        # fix that client side.
-        current = pane.cmd("capture-pane", "-p", "-N", "-T", "-e").stdout
+        if is_session_alive():
+            current = pane.cmd("capture-pane", "-p", "-N", "-T", "-e").stdout
+        else:
+            current = ["Session ended. Reload page to restart!"]
         sio.emit("ptyOutput", {"output": current}, namespace="/terminal")
     except Exception as e:
         log.error(f"Error reading from pty: {e}")
@@ -69,7 +81,10 @@ def emit_output_continuously(sleep_seconds=0.1):
     while True:
         sio.sleep(sleep_seconds)  # type: ignore
         try:
-            current = pane.cmd("capture-pane", "-p", "-N", "-T", "-e").stdout
+            if is_session_alive():
+                current = pane.cmd("capture-pane", "-p", "-N", "-T", "-e").stdout
+            else:
+                current = ["Session ended. Reload page to restart!"]
             if current != prev:
                 sio.emit("ptyOutput", {"output": current}, namespace="/terminal")
                 emit_cursor_position()
@@ -132,6 +147,7 @@ def resend_output(sid):
 def connect(sid, environ):
     """new client connected"""
     log.debug(f"TerminalSocket new client connected {sid}")
+    register_tmux()
 
 
 @sio.on("disconnect", namespace="/terminal")  # type: ignore