Fix updater taking a long time (#696)

Replaces subprocess with asyncio.subprocess in some localplatformlinux functions and improves shutdown handling
Co-authored-by: AAGaming <aagaming@riseup.net>

backend/decky_loader/localplatform/localplatformlinux.py

@@ -1,11 +1,21 @@
 from re import compile
-from asyncio import Lock
+from asyncio import Lock, create_subprocess_exec
+from asyncio.subprocess import PIPE, DEVNULL, STDOUT, Process
+from subprocess import call as call_sync
 import os, pwd, grp, sys, logging
-from subprocess import call, run, DEVNULL, PIPE, STDOUT
+from typing import IO, Any, Mapping
 from ..enums import UserType
 
 logger = logging.getLogger("localplatform")
 
+# subprocess._ENV
+ENV = Mapping[str, str]
+ProcessIO = int | IO[Any] | None
+async def run(args: list[str], stdin: ProcessIO = DEVNULL, stdout: ProcessIO = PIPE, stderr: ProcessIO = PIPE, env: ENV | None = None) -> tuple[Process, bytes | None, bytes | None]:
+    proc = await create_subprocess_exec(args[0], *(args[1:]), stdin=stdin, stdout=stdout, stderr=stderr, env=env)
+    proc_stdout, proc_stderr = await proc.communicate()
+    return (proc, proc_stdout, proc_stderr)
+
 # Get the user id hosting the plugin loader
 def _get_user_id() -> int:
     return pwd.getpwnam(_get_user()).pw_uid
@@ -54,7 +64,7 @@ def chown(path : str,  user : UserType = UserType.HOST_USER, recursive : bool =
     else:
         raise Exception("Unknown User Type")
 
-    result = call(["chown", "-R", user_str, path] if recursive else ["chown", user_str, path])
+    result = call_sync(["chown", "-R", user_str, path] if recursive else ["chown", user_str, path])
     return result == 0
 
 def chmod(path : str, permissions : int, recursive : bool = True) -> bool:
@@ -131,13 +141,17 @@ def setuid(user : UserType = UserType.HOST_USER):
     os.setuid(user_id)
 
 async def service_active(service_name : str) -> bool:
-    res = run(["systemctl", "is-active", service_name], stdout=DEVNULL, stderr=DEVNULL)
+    res, _, _ = await run(["systemctl", "is-active", service_name], stdout=DEVNULL, stderr=DEVNULL)
     return res.returncode == 0
 
-async def service_restart(service_name : str) -> bool:
-    call(["systemctl", "daemon-reload"])
+async def service_restart(service_name : str, block : bool = True) -> bool:
+    await run(["systemctl", "daemon-reload"])
     cmd = ["systemctl", "restart", service_name]
-    res = run(cmd, stdout=PIPE, stderr=STDOUT)
+
+    if not block:
+        cmd.append("--no-block")
+
+    res, _, _ = await run(cmd, stdout=PIPE, stderr=STDOUT)
     return res.returncode == 0
 
 async def service_stop(service_name : str) -> bool:
@@ -146,7 +160,7 @@ async def service_stop(service_name : str) -> bool:
         return True
 
     cmd = ["systemctl", "stop", service_name]
-    res = run(cmd, stdout=PIPE, stderr=STDOUT)
+    res, _, _ = await run(cmd, stdout=PIPE, stderr=STDOUT)
     return res.returncode == 0
 
 async def service_start(service_name : str) -> bool:
@@ -155,13 +169,13 @@ async def service_start(service_name : str) -> bool:
         return True
 
     cmd = ["systemctl", "start", service_name]
-    res = run(cmd, stdout=PIPE, stderr=STDOUT)
+    res, _, _ = await run(cmd, stdout=PIPE, stderr=STDOUT)
     return res.returncode == 0
 
 async def restart_webhelper() -> bool:
     logger.info("Restarting steamwebhelper")
     # TODO move to pkill
-    res = run(["killall", "-s", "SIGTERM", "steamwebhelper"], stdout=DEVNULL, stderr=DEVNULL)
+    res, _, _ = await run(["killall", "-s", "SIGTERM", "steamwebhelper"], stdout=DEVNULL, stderr=DEVNULL)
     return res.returncode == 0
 
 def get_privileged_path() -> str:
@@ -241,12 +255,12 @@ async def close_cef_socket():
             logger.warning("Can't close CEF socket as Decky isn't running as root.")
             return
         # Look for anything listening TCP on port 8080
-        lsof = run(["lsof", "-F", "-iTCP:8080", "-sTCP:LISTEN"], capture_output=True, text=True)
-        if lsof.returncode != 0 or len(lsof.stdout) < 1:
+        lsof, stdout, _ = await run(["lsof", "-F", "-iTCP:8080", "-sTCP:LISTEN"], stdout=PIPE)
+        if not stdout or lsof.returncode != 0 or len(stdout) < 1:
             logger.error(f"lsof call failed in close_cef_socket! return code: {str(lsof.returncode)}")
             return
 
-        lsof_data = cef_socket_lsof_regex.match(lsof.stdout)
+        lsof_data = cef_socket_lsof_regex.match(stdout.decode())
 
         if not lsof_data:
             logger.error("lsof regex match failed in close_cef_socket!")
@@ -258,7 +272,7 @@ async def close_cef_socket():
         logger.info(f"Closing CEF socket with PID {pid} and FD {fd}")
 
         # Use gdb to inject a close() call for the socket fd into steamwebhelper
-        gdb_ret = run(["gdb", "--nx", "-p", pid, "--batch", "--eval-command", f"call (int)close({fd})"], env={"LD_LIBRARY_PATH": ""})
+        gdb_ret, _, _ = await run(["gdb", "--nx", "-p", pid, "--batch", "--eval-command", f"call (int)close({fd})"], env={"LD_LIBRARY_PATH": ""})
 
         if gdb_ret.returncode != 0:
             logger.error(f"Failed to close CEF socket with gdb! return code: {str(gdb_ret.returncode)}", exc_info=True)

backend/decky_loader/localplatform/localplatformwin.py

@@ -28,7 +28,7 @@ async def service_stop(service_name : str) -> bool:
 async def service_start(service_name : str) -> bool:
     return True # Stubbed
 
-async def service_restart(service_name : str) -> bool:
+async def service_restart(service_name : str, block : bool = True) -> bool:
     if service_name == "plugin_loader":
         sys.exit(42)
 

backend/decky_loader/main.py

@@ -138,16 +138,17 @@ async def shutdown(self, _: Application):
             tasks = all_tasks()
             current = current_task()
             async def cancel_task(task: Task[Any]):
-                logger.debug(f"Cancelling task {task}")
+                name = task.get_coro().__qualname__
+                logger.debug(f"Cancelling task {name}")
                 try:
                     task.cancel()
                     try:
                         await task
                     except CancelledError:
                         pass
-                    logger.debug(f"Task {task} finished")
+                    logger.debug(f"Task {name} finished")
                 except:
-                    logger.warning(f"Failed to cancel task {task}:\n" + format_exc())
+                    logger.warning(f"Failed to cancel task {name}:\n" + format_exc())
                     pass
             if current:
                 tasks.remove(current)

backend/decky_loader/plugin/sandboxed_plugin.py

@@ -4,8 +4,9 @@
 from json import dumps, loads
 from logging import getLogger
 from traceback import format_exc
-from asyncio import (get_event_loop, new_event_loop,
+from asyncio import (ensure_future, get_event_loop, new_event_loop,
                      set_event_loop)
+from signal import SIGINT, SIGTERM
 from setproctitle import setproctitle, setthreadtitle
 
 from .messages import SocketResponseDict, SocketMessageType
@@ -38,6 +39,7 @@ def __init__(self,
         self.version = version
         self.author = author
         self.api_version = api_version
+        self.shutdown_running = False
 
         self.log = getLogger("sandboxed_plugin")
 
@@ -48,7 +50,11 @@ def initialize(self, socket: LocalSocket):
             setproctitle(f"{self.name} ({self.file})")
             setthreadtitle(self.name)
 
-            set_event_loop(new_event_loop())
+            loop = new_event_loop()
+            set_event_loop(loop)
+            # When running Decky manually in a terminal, ctrl-c will trigger this, so we have to handle it properly
+            loop.add_signal_handler(SIGINT, lambda: ensure_future(self.shutdown()))
+            loop.add_signal_handler(SIGTERM, lambda: ensure_future(self.shutdown()))
             if self.passive:
                 return
             setgid(UserType.ROOT if "root" in self.flags else UserType.HOST_USER)
@@ -155,22 +161,27 @@ async def _uninstall(self):
             self.log.error("Failed to uninstall " + self.name + "!\n" + format_exc())
             pass
 
-    async def on_new_message(self, message : str) -> str|None:
-        data = loads(message)
-
-        if "stop" in data:
+    async def shutdown(self, uninstall: bool = False):
+        if not self.shutdown_running:
+            self.shutdown_running = True
             self.log.info(f"Calling Loader unload function for {self.name}.")
             await self._unload()
 
-            if data.get('uninstall'):
+            if uninstall:
                 self.log.info("Calling Loader uninstall function.")
                 await self._uninstall()
 
-            self.log.debug("Stopping event loop")
+        self.log.debug("Stopping event loop")
 
-            loop = get_event_loop()
-            loop.call_soon_threadsafe(loop.stop)
-            sys.exit(0)
+        loop = get_event_loop()
+        loop.call_soon_threadsafe(loop.stop)
+        sys.exit(0)
+
+    async def on_new_message(self, message : str) -> str|None:
+        data = loads(message)
+
+        if "stop" in data:
+            await self.shutdown(data.get('uninstall'))
 
         d: SocketResponseDict = {"type": SocketMessageType.RESPONSE, "res": None, "success": True, "id": data["id"]}
         try:

backend/decky_loader/updater.py

@@ -24,6 +24,7 @@
 
 class RemoteVerAsset(TypedDict):
     name: str
+    size: int
     browser_download_url: str
 class RemoteVer(TypedDict):
     tag_name: str
@@ -198,11 +199,13 @@ async def do_update(self):
 
         version = self.remoteVer["tag_name"]
         download_url = None
+        size_in_bytes = None
         download_filename = "PluginLoader" if ON_LINUX else "PluginLoader.exe"
 
         for x in self.remoteVer["assets"]:
             if x["name"] == download_filename:
                 download_url = x["browser_download_url"]
+                size_in_bytes = x["size"]
                 break
 
         if download_url == None:
@@ -238,10 +241,10 @@ async def do_update(self):
                     os.mkdir(path.join(getcwd(), ".systemd"))
                 shutil.move(service_file_path, path.join(getcwd(), ".systemd")+"/plugin_loader.service")
 
-        await self.download_decky_binary(download_url, version)
+        await self.download_decky_binary(download_url, version, size_in_bytes=size_in_bytes)
 
     async def do_restart(self):
-        await service_restart("plugin_loader")
+        await service_restart("plugin_loader", block=False)
 
     async def do_shutdown(self):
         await service_stop("plugin_loader")