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https://github.com/Cog-Creators/Red-DiscordBot.git
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0d193d3e9e
* Show bot is responsive during cog load * Log download of Lavalink.jar event * Fix #1709's other bug * Reformat * Update core_commands.py from merge
101 lines
2.7 KiB
Python
101 lines
2.7 KiB
Python
import shlex
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import shutil
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import asyncio
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from subprocess import Popen, DEVNULL, PIPE
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import os
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import logging
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from typing import Optional, Tuple
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_JavaVersion = Tuple[int, int]
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log = logging.getLogger("red.audio.manager")
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proc = None
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SHUTDOWN = asyncio.Event()
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def has_java_error(pid):
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from . import LAVALINK_DOWNLOAD_DIR
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poss_error_file = LAVALINK_DOWNLOAD_DIR / "hs_err_pid{}.log".format(pid)
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return poss_error_file.exists()
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async def monitor_lavalink_server(loop):
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while not SHUTDOWN.is_set():
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if proc.poll() is not None:
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break
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await asyncio.sleep(0.5)
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if not SHUTDOWN.is_set():
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log.info("Lavalink jar shutdown.")
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if not has_java_error(proc.pid):
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log.info("Restarting Lavalink jar.")
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await start_lavalink_server(loop)
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else:
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log.error(
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"Your Java is borked. Please find the hs_err_pid{}.log file"
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" in the Audio data folder and report this issue.".format(proc.pid)
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)
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async def has_java(loop) -> Tuple[bool, Optional[_JavaVersion]]:
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java_available = shutil.which("java") is not None
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if not java_available:
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return False, None
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version = await get_java_version(loop)
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return version >= (1, 8), version
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async def get_java_version(loop) -> _JavaVersion:
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"""
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This assumes we've already checked that java exists.
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"""
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proc = Popen(shlex.split("java -version", posix=os.name == "posix"), stdout=PIPE, stderr=PIPE)
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_, err = proc.communicate()
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version_info = str(err, encoding="utf-8")
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version_line = version_info.split("\n")[0]
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version_start = version_line.find('"')
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version_string = version_line[version_start + 1 : -1]
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major, minor = version_string.split(".")[:2]
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return int(major), int(minor)
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async def start_lavalink_server(loop):
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java_available, java_version = await has_java(loop)
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if not java_available:
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raise RuntimeError("You must install Java 1.8+ for Lavalink to run.")
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extra_flags = ""
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if java_version == (1, 8):
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extra_flags = "-Dsun.zip.disableMemoryMapping=true"
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from . import LAVALINK_DOWNLOAD_DIR, LAVALINK_JAR_FILE
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start_cmd = "java {} -jar {}".format(extra_flags, LAVALINK_JAR_FILE.resolve())
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global proc
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proc = Popen(
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shlex.split(start_cmd, posix=os.name == "posix"),
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cwd=str(LAVALINK_DOWNLOAD_DIR),
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stdout=DEVNULL,
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stderr=DEVNULL,
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)
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log.info("Lavalink jar started. PID: {}".format(proc.pid))
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loop.create_task(monitor_lavalink_server(loop))
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def shutdown_lavalink_server():
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log.info("Shutting down lavalink server.")
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SHUTDOWN.set()
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global proc
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if proc is not None:
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proc.terminate()
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proc.wait()
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proc = None
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