!squash more server: raise_if_dead, is_alive()

Author: tony

src/libtmux/server.py

@@ -6,6 +6,8 @@
 """
 import logging
 import os
+import shutil
+import subprocess
 import typing as t
 
 from libtmux.common import tmux_cmd
@@ -115,6 +117,31 @@ def __init__(
         if colors:
             self.colors = colors
 
+    def is_alive(self) -> bool:
+        try:
+            res = self.cmd("list-sessions")
+            print(f"returncode: {res.returncode}")
+            print(f"stdout: {res.stdout}")
+            print(f"stderr: {res.stderr}")
+            return res.returncode == 0
+        except Exception:
+            return False
+
+    def raise_if_dead(self) -> None:
+        tmux_bin = shutil.which("tmux")
+        if tmux_bin is None:
+            raise exc.TmuxCommandNotFound()
+
+        cmd_args: t.List[str] = ["list-sessions"]
+        if self.socket_name:
+            cmd_args.insert(0, f"-L{self.socket_name}")
+        if self.socket_path:
+            cmd_args.insert(0, f"-S{self.socket_path}")
+        if self.config_file:
+            cmd_args.insert(0, f"-f{self.config_file}")
+
+        subprocess.check_call([tmux_bin] + cmd_args)
+
     def cmd(self, *args: t.Any, **kwargs: t.Any) -> tmux_cmd:
         """
         Execute tmux command and return output.