Error when Jade is being used by a different app can lead Specter to crash

[moneymanolis]

Below is the stack trace. The error disappeared after running in the browser:

ports = await navigator.serial.getPorts()
await ports[0].close()

We'd need to implement a check for open ports and close them if there are any in Python. Sth. like this:

import serial.tools.list_ports as list_ports
ports = list(list_ports.comports())
if len(ports) > 0:
    port = ports[0].device
    ser = serial.Serial(port)
    ser.close()

Stack trace:

[2023-06-21 17:57:05,491] DEBUG in jade: Failed to connect to Jade simulator at tcp:127.0.0.1:2222
[2023-06-21 17:57:05,491] DEBUG in jade: [Errno 61] Connection refused
Traceback (most recent call last):
  File "/Users/manolis/.pyenv/versions/.specter/lib/python3.10/site-packages/serial/serialposix.py", line 322, in open
    self.fd = os.open(self.portstr, os.O_RDWR | os.O_NOCTTY | os.O_NONBLOCK)
OSError: [Errno 16] Resource busy: '/dev/cu.usbserial-024346F8'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/manolis/.pyenv/versions/3.10.0/lib/python3.10/runpy.py", line 196, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "/Users/manolis/.pyenv/versions/3.10.0/lib/python3.10/runpy.py", line 86, in _run_code
    exec(code, run_globals)
  File "/Users/manolis/coding/repos/specter-desktop/src/cryptoadvance/specter/__main__.py", line 7, in <module>
    entry_point()
  File "/Users/manolis/.pyenv/versions/.specter/lib/python3.10/site-packages/click/core.py", line 1130, in __call__
    return self.main(*args, **kwargs)
  File "/Users/manolis/.pyenv/versions/.specter/lib/python3.10/site-packages/click/core.py", line 1055, in main
    rv = self.invoke(ctx)
  File "/Users/manolis/.pyenv/versions/.specter/lib/python3.10/site-packages/click/core.py", line 1657, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/Users/manolis/.pyenv/versions/.specter/lib/python3.10/site-packages/click/core.py", line 1404, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/Users/manolis/.pyenv/versions/.specter/lib/python3.10/site-packages/click/core.py", line 760, in invoke
    return __callback(*args, **kwargs)
  File "/Users/manolis/coding/repos/specter-desktop/src/cryptoadvance/specter/cli/cli_server.py", line 151, in server
    init_app(app, hwibridge=hwibridge)
  File "/Users/manolis/coding/repos/specter-desktop/src/cryptoadvance/specter/server.py", line 180, in init_app
    specter.hwi = HWIBridge()
  File "/Users/manolis/coding/repos/specter-desktop/src/cryptoadvance/specter/hwi_rpc.py", line 88, in __init__
    self.enumerate()
  File "/Users/manolis/coding/repos/specter-desktop/src/cryptoadvance/specter/helpers.py", line 99, in wrapper_fn
    return fn(*args, **kwargs)
  File "/Users/manolis/coding/repos/specter-desktop/src/cryptoadvance/specter/hwi_rpc.py", line 121, in enumerate
    client = devcls.get_client(dev["path"], passphrase)
  File "/Users/manolis/coding/repos/specter-desktop/src/cryptoadvance/specter/devices/jade.py", line 23, in get_client
    return JadeClient(*args, **kwargs)
  File "/Users/manolis/coding/repos/specter-desktop/src/cryptoadvance/specter/devices/hwi/jade.py", line 151, in __init__
    self.jade.connect()
  File "/Users/manolis/coding/repos/specter-desktop/src/cryptoadvance/specter/devices/hwi/jadepy/jade.py", line 123, in connect
    self.jade.connect()
  File "/Users/manolis/coding/repos/specter-desktop/src/cryptoadvance/specter/devices/hwi/jadepy/jade.py", line 568, in connect
    self.impl.connect()
  File "/Users/manolis/coding/repos/specter-desktop/src/cryptoadvance/specter/devices/hwi/jadepy/jade_serial.py", line 32, in connect
    self.ser = serial.Serial(
  File "/Users/manolis/.pyenv/versions/.specter/lib/python3.10/site-packages/serial/serialutil.py", line 244, in __init__
    self.open()
  File "/Users/manolis/.pyenv/versions/.specter/lib/python3.10/site-packages/serial/serialposix.py", line 325, in open
    raise SerialException(msg.errno, "could not open port {}: {}".format(self._port, msg))
serial.serialutil.SerialException: [Errno 16] could not open port /dev/cu.usbserial-024346F8: [Errno 16] Resource busy: '/dev/cu.usbserial-024346F8'