clearml-session/clearml_session/__main__.py

import base64
import hashlib
import json
import logging
import os
import subprocess
import sys
from pathlib import Path
from argparse import ArgumentParser, FileType
from functools import reduce
from getpass import getpass
from io import TextIOBase, StringIO
from time import time, sleep

if sys.platform == 'win32':
    import msvcrt  # noqa
    import wexpect_venv as pexpect
else:
    import select  # noqa
    import pexpect  # noqa

import psutil
from clearml import Task
from clearml.backend_api.session.client import APIClient, APIError
from clearml.config import config_obj
from clearml.backend_api import Session
from .tcp_proxy import TcpProxy
from .single_thread_proxy import SingleThreadProxy
from .version import __version__

# noinspection PyBroadException
try:
    Session.add_client(__package__.partition(".")[0].replace("_", "-"), __version__)  # noqa
except Exception:
    pass

system_tag = 'interactive'
default_docker_image = 'nvidia/cuda:10.1-runtime-ubuntu18.04'


class NonInteractiveError(Exception):
    pass


def _read_std_input(timeout):
    # wait for user input with timeout, return None if timeout or user input
    if sys.platform == 'win32':
        start_time = time()
        input_str = ''
        while True:
            if msvcrt.kbhit():
                char = msvcrt.getche()
                if ord(char) == 13:  # enter_key
                    print('')
                    return input_str.strip()
                input_str += char.decode()
            if len(input_str) == 0 and (time() - start_time) > timeout:
                return None
    else:
        i, o, e = select.select([sys.stdin], [], [], timeout)
        if not i:
            return None
        line = sys.stdin.readline().strip()
        # flush stdin buffer
        while i:
            i, o, e = select.select([sys.stdin], [], [], 0)
            if i:
                sys.stdin.readline()
        return line


def _get_config_section_name():
    org_path = [p for p in sys.path]
    # noinspection PyBroadException
    try:
        sys.path.append(os.path.abspath(os.path.join(__file__, '..',)))
        from interactive_session_task import (  # noqa
            config_section_name, config_object_section_ssh, config_object_section_bash_init)  # noqa
        return config_section_name, config_object_section_ssh, config_object_section_bash_init
    except Exception:
        return None, None, None
    finally:
        sys.path = org_path


def _check_ssh_executable():
    # check Windows 32bit version is not supported
    if sys.platform == 'win32' and getattr(sys, 'winver', '').endswith('-32'):
        raise ValueError("Python 32-bit version detected. Only Python 64-bit is supported!")

    # noinspection PyBroadException
    try:
        if sys.platform == 'win32':
            ssh_exec = subprocess.check_output('where ssh.exe'.split()).decode('utf-8').split('\n')[0].strip()
        else:
            ssh_exec = subprocess.check_output('which ssh'.split()).decode('utf-8').split('\n')[0].strip()
        return ssh_exec
    except Exception:
        return None


def _check_configuration():
    from clearml.backend_api import Session

    return Session.get_api_server_host() != Session.default_demo_host


def _check_available_port(port, ipv6=True):
    """ True -- it's possible to listen on this port for TCP/IPv4 or TCP/IPv6
    connections. False -- otherwise.
    """
    import socket

    # noinspection PyBroadException
    try:
        sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        sock.bind(('127.0.0.1', port))
        sock.listen(1)
        sock.close()
        if ipv6:
            sock = socket.socket(socket.AF_INET6, socket.SOCK_STREAM)
            sock.bind(('::1', port))
            sock.listen(1)
            sock.close()
    except Exception:
        return False

    return True


def _get_available_ports(list_initial_ports):
    # noinspection PyBroadException
    try:
        used_ports = [i.laddr.port for i in psutil.net_connections()]
    except Exception:
        used_ports = None

    available_ports = []
    for p in list_initial_ports:
        port = next(
            i for i in range(p, 65000)
            if i not in available_ports and
            ((used_ports is not None and i not in used_ports) or (used_ports is None and _check_available_port(i)))
        )
        available_ports.append(port)
    return available_ports


def create_base_task(state, project_name=None, task_name=None):
    task = Task.create(project_name=project_name or 'DevOps',
                       task_name=task_name or 'Interactive Session',
                       task_type=Task.TaskTypes.application)
    task_script = task.data.script.to_dict()
    base_script_file = os.path.abspath(os.path.join(__file__, '..', 'tcp_proxy.py'))
    with open(base_script_file, 'rt') as f:
        task_script['diff'] = f.read()
    base_script_file = os.path.abspath(os.path.join(__file__, '..', 'interactive_session_task.py'))
    with open(base_script_file, 'rt') as f:
        task_script['diff'] += '\n\n' + f.read()

    task_script['working_dir'] = '.'
    task_script['entry_point'] = '.interactive_session.py'
    task_script['requirements'] = {'pip': '\n'.join(
        ["clearml>=1.1.5"] +
        (["jupyter", "jupyterlab", "traitlets"] if state.get('jupyter_lab') else []) +
        (['pylint'] if state.get('vscode_server') else []))}

    section, _, _ = _get_config_section_name()

    if Session.check_min_api_version('2.13'):
        # noinspection PyProtectedMember
        _runtime_prop = dict(task._get_runtime_properties())
        _runtime_prop.update({
            "_user_key": '',
            "_user_secret": '',
            "_jupyter_token": '',
            "_ssh_password": "training",
        })
        # noinspection PyProtectedMember
        task._set_runtime_properties(_runtime_prop)
        task.set_parameters({
            "{}/user_base_directory".format(section): "~/",
            "{}/ssh_server".format(section): True,
            "{}/default_docker".format(section): "nvidia/cuda",
            "properties/external_address": '',
            "properties/internal_ssh_port": '',
            "properties/jupyter_port": '',
        })
    else:
        task.set_parameters({
            "{}/user_base_directory".format(section): "~/",
            "{}/ssh_server".format(section): True,
            "{}/ssh_password".format(section): "training",
            "{}/default_docker".format(section): "nvidia/cuda",
            "{}/user_key".format(section): '',
            "{}/user_secret".format(section): '',
            "properties/external_address": '',
            "properties/internal_ssh_port": '',
            "properties/jupyter_token": '',
            "properties/jupyter_port": '',
        })

    task.set_system_tags([system_tag])

    # if we need to upload data now is the time
    if state.get("upload_files"):
        print("Uploading local files: {}".format(state.get("upload_files")))
        task.upload_artifact(
            name="session-files",
            artifact_object=Path(state.get("upload_files")).expanduser(),
            wait_on_upload=True
        )
        print("Local files upload completed")

    # only update the data at the end, so reload requests are smaller
    # noinspection PyProtectedMember
    task._edit(script=task_script)
    return task


def create_debugging_task(state, debug_task_id):
    debug_task = Task.get_task(task_id=debug_task_id)
    # if there is no git repository, we cannot debug it
    if not debug_task.data.script.repository:
        raise ValueError("Debugging task has no git repository, single script debugging is not supported.")

    task = Task.clone(source_task=debug_task_id, parent=debug_task_id)

    task_state = task.export_task()

    base_script_file = os.path.abspath(os.path.join(__file__, '..', 'interactive_session_task.py'))
    with open(base_script_file, 'rt') as f:
        entry_diff = ['+'+line.rstrip() for line in f.readlines()]
    entry_diff_header = \
        "diff --git a/__interactive_session__.py b/__interactive_session__.py\n" \
        "--- a/__interactive_session__.py\n" \
        "+++ b/__interactive_session__.py\n" \
        "@@ -0,0 +1,{} @@\n".format(len(entry_diff))

    task_state['script']['diff'] = \
        entry_diff_header + '\n'.join(entry_diff) + '\n' + (task_state['script']['diff'] or '')
    task_state['script']['working_dir'] = '.'
    task_state['script']['entry_point'] = '__interactive_session__.py'
    state['packages'] = \
        (state.get('packages') or []) + ["clearml"] + \
        (["jupyter", "jupyterlab", "jupyterlab_git"] if state.get('jupyter_lab') else []) + \
        (['pylint'] if state.get('vscode_server') else [])
    task.update_task(task_state)
    section, _, _ = _get_config_section_name()

    if Session.check_min_api_version('2.13'):
        # noinspection PyProtectedMember
        _runtime_prop = dict(task._get_runtime_properties())
        _runtime_prop.update({
            "_user_key": '',
            "_user_secret": '',
            "_jupyter_token": '',
            "_ssh_password": "training",
        })
        # noinspection PyProtectedMember
        task._set_runtime_properties(_runtime_prop)
        task.set_parameters({
            "{}/user_base_directory".format(section): "~/",
            "{}/ssh_server".format(section): True,
            "{}/default_docker".format(section): "nvidia/cuda",
            "properties/external_address": '',
            "properties/internal_ssh_port": '',
            "properties/jupyter_port": '',
        })
    else:
        task.set_parameters({
            "{}/user_base_directory".format(section): "~/",
            "{}/ssh_server".format(section): True,
            "{}/ssh_password".format(section): "training",
            "{}/default_docker".format(section): "nvidia/cuda",
            "{}/user_key".format(section): '',
            "{}/user_secret".format(section): '',
            "properties/external_address": '',
            "properties/internal_ssh_port": '',
            "properties/jupyter_token": '',
            "properties/jupyter_port": '',
        })
    task.set_system_tags([system_tag])
    task.reset(force=True)
    return task


def delete_old_tasks(state, client, base_task_id):
    print('Removing stale interactive sessions')
    current_user_id = _get_user_id(client)
    previous_tasks = client.tasks.get_all(**{
        'status': ['failed', 'stopped', 'completed'],
        'parent': base_task_id or None,
        'system_tags': None if base_task_id else [system_tag],
        'page_size': 100, 'page': 0,
        'user': [current_user_id],
        'only_fields': ['id']
    })

    for i, t in enumerate(previous_tasks):
        if state.get('verbose'):
            print('Removing {}/{} stale sessions'.format(i+1, len(previous_tasks)))
        try:
            Task.get_task(task_id=t.id).delete(delete_artifacts_and_models=True, skip_models_used_by_other_tasks=True, raise_on_error=True)
        except Exception as ex:
            logging.getLogger().warning('{}\nFailed deleting old session {}'.format(ex, t.id))
            try:
                client.tasks.delete(task=t.id, force=True)
            except Exception as ex:
                logging.getLogger().warning('{}\nFailed deleting old session {}'.format(ex, t.id))


def _get_running_tasks(client, prev_task_id):
    current_user_id = _get_user_id(client)
    previous_tasks = client.tasks.get_all(**{
        'status': ['in_progress'],
        'system_tags': [system_tag],
        'page_size': 10, 'page': 0,
        'order_by': ['-last_update'],
        'user': [current_user_id], 'only_fields': ['id', 'created', 'parent']
    })
    tasks_id_created = [(t.id, t.created, t.parent) for t in previous_tasks]
    if prev_task_id and prev_task_id not in (t[0] for t in tasks_id_created):
        # manually check the last task.id
        try:
            prev_tasks = client.tasks.get_all(**{
                'status': ['in_progress'],
                'id': [prev_task_id],
                'page_size': 10, 'page': 0,
                'order_by': ['-last_update'],
                'only_fields': ['id', 'created', 'parent']
            })
        except APIError:
            # we could not find previous task, nothing to worry about.
            prev_tasks = None

        if prev_tasks:
            tasks_id_created += [(prev_tasks[0].id, prev_tasks[0].created, prev_tasks[0].parent)]

    return tasks_id_created


def _get_user_id(client):
    if not client:
        client = APIClient()
    res = client.session.send_request(service='users', action='get_current_user', async_enable=False)
    assert res.ok
    current_user_id = res.json()['data']['user']['id']
    return current_user_id


def _b64_encode_file(file):
    # noinspection PyBroadException
    try:
        import gzip
        with open(file, 'rt') as f:
            git_credentials = gzip.compress(f.read().encode('utf8'))
        return base64.encodebytes(git_credentials).decode('ascii')
    except Exception:
        return None


def get_project_id(project_name):
    project_id = None
    if project_name:
        projects = Task.get_projects()
        project_id = [p for p in projects if p.name == project_name]
        if project_id:
            project_id = project_id[0]
        else:
            logging.getLogger().warning("could not locate project by the named '{}'".format(project_name))
            project_id = None
    return project_id


def get_user_inputs(args, parser, state, client):
    default_needed_args = tuple()
    assume_yes = args.yes

    user_args = sorted([a for a in args.__dict__ if not a.startswith('_')])
    # clear some states if we replace the base_task_id
    if 'base_task_id' in user_args and getattr(args, 'base_task_id', None) != state.get('base_task_id'):
        print('New base_task_id \'{}\', clearing previous packages & init_script'.format(
            getattr(args, 'base_task_id', None)))
        state.pop('init_script', None)
        state.pop('packages', None)
        state.pop('base_task_id', None)

    if str(getattr(args, 'base_task_id', '')).lower() == 'none':
        args.base_task_id = None
        state['base_task_id'] = None

    for a in user_args:
        v = getattr(args, a, None)
        if a in ('requirements', 'packages', 'attach', 'config_file'):
            continue
        if isinstance(v, TextIOBase):
            state[a] = v.read()
        elif not v and a == 'init_script':
            if v is None:
                state[a] = ''
            else:
                pass  # keep as is
        elif not v and a == 'remote_gateway':
            state.pop(a, None)
        elif v is not None:
            state[a] = v

        if a in default_needed_args and not state.get(a):
            if assume_yes:
                raise NonInteractiveError(
                    "Using `--yes` but could not locate previously used value of '{}'".format(a))
            # noinspection PyProtectedMember
            state[a] = input(
                "\nCould not locate previously used value of '{}', please provide it?"
                "\n    Help: {}\n> ".format(
                    a, parser._option_string_actions['--{}'.format(a.replace('_', '-'))].help))
    # if no password was set, create a new random one
    if not state.get('password'):
        state['password'] = hashlib.sha256("seed me Seymour {}".format(time()).encode()).hexdigest()

    # store the requirements from the requirements.txt
    # override previous requirements
    if args.requirements:
        state['packages'] = (args.packages or []) + [
            p.strip() for p in args.requirements.readlines() if not p.strip().startswith('#')]
    elif args.packages is not None:
        state['packages'] = args.packages or []

    # allow to select queue
    ask_queues = not state.get('queue')

    if assume_yes:
        if ask_queues:
            raise NonInteractiveError("Using `--yes` but no queue provided or previously used")
        print("Using previous queue (resource) '{}'".format(state["queue"]))
    elif state.get('queue'):
        choice = input('Use previous queue (resource) \'{}\' [Y]/n? '.format(state['queue']))
        if str(choice).strip().lower() in ('n', 'no'):
            ask_queues = True

    if ask_queues:
        print('Select the queue (resource) you request:')
        queues = None
        if not state.get('queue_include_tag') and not state.get('queue_excluded_tag'):
            # try default queue listing "interactive"
            queues = sorted([q.name for q in client.queues.get_all(system_tags=[str(system_tag)])])

        # if we have nothing, we just search for everything
        if not queues:
            queues = sorted([q.name for q in client.queues.get_all(
                system_tags=['-{}'.format(t) for t in state.get('queue_excluded_tag', ['internal'])] +
                            ['{}'.format(t) for t in state.get('queue_include_tag', [])])])

        queues_list = '\n'.join('{}] {}'.format(i, q) for i, q in enumerate(queues))
        while True:
            try:
                choice = int(input(queues_list+'\nSelect a queue [0-{}]: '.format(len(queues)-1)))
                assert 0 <= choice < len(queues)
                break
            except (TypeError, ValueError, AssertionError):
                pass
        state['queue'] = queues[int(choice)]

    print("\nInteractive session config:\n{}\n".format(
        json.dumps({k: v for k, v in state.items() if not str(k).startswith('__')}, indent=4, sort_keys=True)))

    # no need to ask just return the value
    if assume_yes:
        return state

    choice = input('Launch interactive session [Y]/n? ')
    if str(choice).strip().lower() in ('n', 'no'):
        print('User aborted')
        exit(0)

    return state


def save_state(state, state_file):
    # if we are running in debugging mode,
    # only store the current task (do not change the defaults)
    if state.get('debugging_session'):
        # noinspection PyBroadException
        base_state = load_state(state_file)
        base_state['task_id'] = state.get('task_id')
        state = base_state

    state['__version__'] = get_version()
    # save new state
    with open(state_file, 'wt') as f:
        json.dump(state, f, sort_keys=True)


def load_state(state_file):
    # noinspection PyBroadException
    try:
        with open(state_file, 'rt') as f:
            state = json.load(f)
    except Exception:
        state = {}
    # never reload --verbose and --yes states
    state.pop('verbose', None)
    state.pop('yes', None)
    state.pop('shell', None)
    state.pop('upload_files', None)
    return state


def clone_task(state, project_id=None):
    new_task = False
    if state.get('debugging_session'):
        print('Starting new debugging session to {}'.format(state.get('debugging_session')))
        task = create_debugging_task(state, state.get('debugging_session'))
    elif state.get('base_task_id'):
        print('Cloning base session {}'.format(state['base_task_id']))
        project_id = \
            project_id or (get_project_id(project_name=state.get('project')) if state.get('project') else None)
        task = Task.clone(source_task=state['base_task_id'], project=project_id, parent=state['base_task_id'])
        task.set_system_tags([system_tag])
    else:
        print('Creating new session')
        task = create_base_task(state, project_name=state.get('project'))
        new_task = True

    print('Configuring new session')
    runtime_prop_support = Session.check_min_api_version("2.13")
    if runtime_prop_support:
        # noinspection PyProtectedMember
        runtime_properties = dict(task._get_runtime_properties() or {})
        runtime_properties['_jupyter_token'] = ''
        runtime_properties['_ssh_password'] = str(state['password'])
        runtime_properties['_user_key'] = str(config_obj.get("api.credentials.access_key"))
        runtime_properties['_user_secret'] = (config_obj.get("api.credentials.secret_key"))
        # noinspection PyProtectedMember
        task._set_runtime_properties(runtime_properties)

    task_params = task.get_parameters(backwards_compatibility=False)
    if 'General/ssh_server' in task_params:
        section = 'General'
        init_section = 'init_script'
    else:
        section, _, init_section = _get_config_section_name()

    if not runtime_prop_support:
        task_params['properties/jupyter_token'] = ''
        task_params['{}/ssh_password'.format(section)] = state['password']
        task_params['{}/user_key'.format(section)] = config_obj.get("api.credentials.access_key")
        task_params['{}/user_secret'.format(section)] = config_obj.get("api.credentials.secret_key")

    task_params['properties/jupyter_port'] = ''
    if state.get('remote_gateway') is not None:
        remote_gateway_parts = str(state.get('remote_gateway')).split(':')
        task_params['properties/external_address'] = remote_gateway_parts[0]
        if len(remote_gateway_parts) > 1:
            task_params['properties/external_ssh_port'] = remote_gateway_parts[1]
    task_params['{}/ssh_server'.format(section)] = str(True)
    task_params["{}/jupyterlab".format(section)] = bool(state.get('jupyter_lab'))
    task_params["{}/vscode_server".format(section)] = bool(state.get('vscode_server'))
    task_params["{}/public_ip".format(section)] = bool(state.get('public_ip'))
    task_params["{}/ssh_ports".format(section)] = state.get('remote_ssh_port') or ''
    task_params["{}/vscode_version".format(section)] = state.get('vscode_version') or ''
    task_params["{}/vscode_extensions".format(section)] = state.get('vscode_extensions') or ''
    task_params["{}/force_dropbear".format(section)] = bool(state.get('force_dropbear'))
    if state.get('user_folder'):
        task_params['{}/user_base_directory'.format(section)] = state.get('user_folder')
    docker = state.get('docker') or task.get_base_docker()
    if not state.get('skip_docker_network') and not docker:
        docker = default_docker_image
    if docker:
        task_params['{}/default_docker'.format(section)] = docker.replace('--network host', '').strip()
        if state.get('docker_args'):
            docker += ' {}'.format(state.get('docker_args'))
        task.set_base_docker(docker + (
            ' --network host' if not state.get('skip_docker_network') and '--network host' not in docker else ''))
    # set the bash init script
    if state.get('init_script') is not None and (not new_task or state.get('init_script').strip()):
        # noinspection PyProtectedMember
        task._set_configuration(name=init_section, config_type='bash', config_text=state.get('init_script') or '')

    # store the .git-credentials
    if state.get('git_credentials'):
        git_cred_file = os.path.join(os.path.expanduser('~'), '.git-credentials')
        git_conf_file = os.path.join(os.path.expanduser('~'), '.gitconfig')
        if not os.path.isfile(git_cred_file):
            git_cred_file = None
        if not os.path.isfile(git_conf_file):
            git_conf_file = None

        if runtime_prop_support:
            # noinspection PyProtectedMember
            runtime_properties = dict(task._get_runtime_properties() or {})
            if git_cred_file:
                runtime_properties['_git_credentials'] = _b64_encode_file(git_cred_file)
            if git_conf_file:
                runtime_properties['_git_config'] = _b64_encode_file(git_conf_file)
            # store back
            if git_cred_file or git_conf_file:
                # noinspection PyProtectedMember
                task._set_runtime_properties(runtime_properties)
        else:
            if git_cred_file:
                task.connect_configuration(
                    configuration=git_cred_file, name='git_credentials', description='git credentials')
            if git_conf_file:
                task.connect_configuration(
                    configuration=git_conf_file, name='git_config', description='git config')

    if state.get('packages'):
        requirements = task.data.script.requirements or {}
        # notice split order is important!
        packages = [p for p in state['packages'] if p.strip() and not p.strip().startswith('#')]
        packages_id = set(reduce(lambda a, b: a.split(b)[0], "#;@=~<>", p).strip() for p in packages)
        if isinstance(requirements.get('pip'), str):
            requirements['pip'] = requirements['pip'].split('\n')
        for p in (requirements.get('pip') or []):
            if not p.strip() or p.strip().startswith('#'):
                continue
            p_id = reduce(lambda a, b: a.split(b)[0], "#;@=~<>", p).strip()
            if p_id not in packages_id:
                packages += [p]

        requirements['pip'] = '\n'.join(sorted(packages))
        task.update_task({'script': {'requirements': requirements}})
    task.set_parameters(task_params)
    print('New session created [id={}]'.format(task.id))
    return task


def wait_for_machine(state, task):
    # wait until task is running
    print('Waiting for remote machine allocation [id={}]'.format(task.id))
    last_status = None
    last_message = None
    stopped_counter = 0
    while last_status != 'in_progress' and last_status in (None, 'created', 'queued', 'unknown', 'stopped'):
        print('.', end='', flush=True)
        if last_status is not None:
            sleep(2.)
            stopped_counter = (stopped_counter+1) if last_status == 'stopped' else 0
            if stopped_counter > 5:
                break
        # noinspection PyProtectedMember
        status, message = task.get_status_message() if hasattr(task, "get_status_message") else task._get_status()
        status = str(status)
        if last_status != status or last_message != message:
            # noinspection PyProtectedMember
            print('Status [{}]{} {}'.format(status, ' - {}'.format(last_status) if last_status else '', message))
        last_status = status
        last_message = message

    print('Remote machine allocated')
    print('Setting remote environment [Task id={}]'.format(task.id))
    print('Setup process details: {}'.format(task.get_output_log_web_page()))
    print('Waiting for environment setup to complete [usually about 20-30 seconds, see last log line/s below]')
    # monitor progress, until we get the new jupyter, then we know it is working
    task.reload()

    section, _, _ = _get_config_section_name()
    jupyterlab = \
        task.get_parameter("{}/jupyterlab".format(section)) or \
        task.get_parameter("General/jupyterlab") or ''
    state['jupyter_lab'] = jupyterlab.strip().lower() != 'false'
    vscode_server = \
        task.get_parameter("{}/vscode_server".format(section)) or \
        task.get_parameter("General/vscode_server") or ''
    state['vscode_server'] = vscode_server.strip().lower() != 'false'

    wait_properties = ['properties/internal_ssh_port']
    if state.get('jupyter_lab'):
        wait_properties += ['properties/jupyter_port']
    if state.get('vscode_server'):
        wait_properties += ['properties/vscode_port']

    last_lines = []
    period_counter = 0
    while any(bool(not task.get_parameter(p)) for p in wait_properties) and task.get_status() == 'in_progress':
        lines = task.get_reported_console_output(10 if state.get('verbose') else 1)
        if last_lines != lines:
            # new line if we had '.' counter in the previous run
            if period_counter:
                if state.get('verbose'):
                    print('')
                period_counter = 0
            try:
                index = next(i for i, line in enumerate(lines) if last_lines and line == last_lines[-1])
                print_line = '> ' + ''.join(lines[index+1:]).rstrip().replace('\n', '\n> ')
            except StopIteration:
                print_line = '> ' + ''.join(lines).rstrip().replace('\n', '\n> ')

            if state.get('verbose'):
                print(print_line)
            else:
                print_line = [l for l in print_line.split('\n') if l.rstrip()]
                if print_line:
                    print('\r' + print_line[-1], end='', flush=True)
            last_lines = lines
        else:
            period_counter += 1
            print(('' if state.get('verbose') else '\r') + '.'*period_counter, end='', flush=True)

        sleep(3.)
        task.reload()

    # clear the line
    if not state.get('verbose'):
        print('\r     ', end='', flush=True)
        print('\n')
        
    if task.get_status() != 'in_progress':
        log_lines = task.get_reported_console_output(10)
        log_lines = "\n".join("\n".join("> " + l for l in line.split("\n")) for line in log_lines)
        print("\n".join(log_lines.split("\n")[-10:]))
        raise ValueError("Remote setup failed (status={}) see details: {}".format(
            task.get_status(), task.get_output_log_web_page()))
    print('\nRemote machine is ready')

    return task


def start_ssh_tunnel(username, remote_address, ssh_port, ssh_password, local_remote_pair_list, debug=False):
    print('Starting SSH tunnel to {}@{}, port {}'.format(username, remote_address, ssh_port))
    child = None
    args = ['-C',
            '{}@{}'.format(username, remote_address), '-p', '{}'.format(ssh_port),
            '-o', 'UserKnownHostsFile=/dev/null',
            '-o', 'Compression=yes',
            '-o', 'StrictHostKeyChecking=no',
            '-o', 'ServerAliveInterval=10',
            '-o', 'ServerAliveCountMax=10', ]

    for local, remote in local_remote_pair_list:
        args.extend(['-L', '{}:localhost:{}'.format(local, remote)])

    # store SSH output
    fd = StringIO() if debug else sys.stdout

    # noinspection PyBroadException
    try:
        child = pexpect.spawn(
            command=_check_ssh_executable(),
            args=args,
            logfile=fd, timeout=20, encoding='utf-8')

        # Match only "(yes/no" in order to handle both (yes/no) and (yes/no/[fingerprint])
        i = child.expect([r'(?i)password:', r'\(yes\/no', r'.*[$#] ', pexpect.EOF])
        if i == 0:
            child.sendline(ssh_password)
            try:
                child.expect([r'(?i)password:'], timeout=5)
                print('{}Error: incorrect password'.format(fd.read() + '\n' if debug else ''))
                ssh_password = getpass('Please enter password manually: ')
                child.sendline(ssh_password)
                child.expect([r'(?i)password:'], timeout=5)
                print('{}Error: incorrect user input password'.format(fd.read() + '\n' if debug else ''))
                raise ValueError('Incorrect password')
            except pexpect.TIMEOUT:
                pass

        elif i == 1:
            child.sendline("yes")
            ret1 = child.expect([r"(?i)password:", pexpect.EOF])
            if ret1 == 0:
                child.sendline(ssh_password)
                try:
                    child.expect([r'(?i)password:'], timeout=5)
                    print('Error: incorrect password')
                    ssh_password = getpass('Please enter password manually: ')
                    child.sendline(ssh_password)
                    child.expect([r'(?i)password:'], timeout=5)
                    print('{}Error: incorrect user input password'.format(fd.read() + '\n' if debug else ''))
                    raise ValueError('Incorrect password')
                except pexpect.TIMEOUT:
                    pass
    except Exception:
        child.terminate(force=True)
        child = None
    print('\n')
    if child:
        child.logfile = None
    return child, ssh_password


def monitor_ssh_tunnel(state, task):
    def interactive_ssh(p):
        import struct, fcntl, termios, signal, sys  # noqa

        def sigwinch_passthrough(sig, data):
            s = struct.pack("HHHH", 0, 0, 0, 0)
            a = struct.unpack('hhhh', fcntl.ioctl(sys.stdout.fileno(), termios.TIOCGWINSZ, s))
            if not p.closed:
                p.setwinsize(a[0], a[1])

        print("Switching to active SSH session, press ``Ctrl - ]`` to leave")
        # Note this 'p' is global and used in sigwinch_passthrough.
        signal.signal(signal.SIGWINCH, sigwinch_passthrough)
        p.interact()
        print("\nSSH session running in background\n")

    print('Setting up connection to remote session')
    local_jupyter_port, local_jupyter_port_, local_ssh_port, local_ssh_port_, local_vscode_port, local_vscode_port_ = \
        _get_available_ports([8878, 8878+1,  8022, 8022+1, 8898, 8898+1])
    ssh_process = None
    sleep_period = 3
    ssh_port = jupyter_token = jupyter_port = internal_ssh_port = ssh_password = remote_address = None
    vscode_port = None

    connect_state = {'reconnect': False}
    if state.get('keepalive'):
        if state.get('jupyter_lab'):
            SingleThreadProxy(local_jupyter_port, local_jupyter_port_)
        if state.get('vscode_server'):
            SingleThreadProxy(local_vscode_port, local_vscode_port_)
        TcpProxy(local_ssh_port, local_ssh_port_, connect_state, verbose=False,
                 keep_connection=True, is_connection_server=False)
    else:
        local_jupyter_port_ = local_jupyter_port
        local_ssh_port_ = local_ssh_port
        local_vscode_port_ = local_vscode_port

    default_section = _get_config_section_name()[0]
    local_remote_pair_list = []
    shutdown = False
    try:
        while task.get_status() == 'in_progress':
            if not all([
                ssh_port,
                not state.get('jupyter_lab') or jupyter_token,
                not state.get('jupyter_lab') or jupyter_port,
                not state.get('vscode_server') or vscode_port,
                internal_ssh_port,
                ssh_password,
                remote_address
            ]):
                task.reload()
                task_parameters = task.get_parameters()
                if Session.check_min_api_version("2.13"):
                    # noinspection PyProtectedMember
                    runtime_prop = task._get_runtime_properties()
                    ssh_password = runtime_prop.get('_ssh_password') or state.get('password', '')
                    jupyter_token = runtime_prop.get('_jupyter_token')
                else:
                    section = 'General' if 'General/ssh_server' in task_parameters else default_section
                    ssh_password = task_parameters.get('{}/ssh_password'.format(section)) or state.get('password', '')
                    jupyter_token = task_parameters.get('properties/jupyter_token')

                remote_address = \
                    task_parameters.get('properties/k8s-gateway-address') or \
                    task_parameters.get('properties/external_address')
                internal_ssh_port = task_parameters.get('properties/internal_ssh_port')
                jupyter_port = task_parameters.get('properties/jupyter_port')
                ssh_port = \
                    task_parameters.get('properties/k8s-pod-port') or \
                    task_parameters.get('properties/external_ssh_port') or internal_ssh_port
                if state.get('keepalive'):
                    internal_ssh_port = task_parameters.get('properties/internal_stable_ssh_port') or internal_ssh_port
                local_remote_pair_list = [(local_ssh_port_, internal_ssh_port)]
                if state.get('jupyter_lab'):
                    local_remote_pair_list += [(local_jupyter_port_, jupyter_port)]
                if state.get('vscode_server'):
                    vscode_port = task_parameters.get('properties/vscode_port')
                    try:
                        if vscode_port and int(vscode_port) <= 0:
                            vscode_port = None
                    except (ValueError, TypeError):
                        pass
                if vscode_port:
                    local_remote_pair_list += [(local_vscode_port_, vscode_port)]

            if not jupyter_port and state.get('jupyter_lab'):
                print('Waiting for Jupyter server...')
                continue

            if connect_state.get('reconnect'):
                # noinspection PyBroadException
                try:
                    ssh_process.close(**({'force': True} if sys.platform != 'win32' else {}))
                    ssh_process = None
                except Exception:
                    pass

            connect_message = (
                '\nConnection is up and running\n'
                'Enter \"r\" (or \"reconnect\") to reconnect the session (for example after suspend)\n'
                '`s` (or "shell") to connect to the SSH session\n'
                '`Ctrl-C` (or "quit") to abort (remote session remains active)\n'
                'or \"Shutdown\" to shut down remote interactive session'
            )
            short_console_msg = \
                "Enter \"r\" (\"reconnect\"), `s` (\"shell\"), `Ctrl-C` (\"quit\") or \"Shutdown\""

            if not ssh_process or not ssh_process.isalive():
                ssh_process, ssh_password = start_ssh_tunnel(
                    state.get('username') or 'root',
                    remote_address, ssh_port, ssh_password,
                    local_remote_pair_list=local_remote_pair_list,
                    debug=state.get('verbose', False),
                )

                if ssh_process and ssh_process.isalive():
                    msg = \
                        'Interactive session is running:\n'\
                        'SSH: ssh {username}@localhost -p {local_ssh_port} [password: {ssh_password}]'.format(
                            username=state.get('username') or 'root',
                            local_ssh_port=local_ssh_port, ssh_password=ssh_password)
                    if jupyter_port:
                        msg += \
                            '\nJupyter Lab URL: http://localhost:{local_jupyter_port}/?token={jupyter_token}'.format(
                                local_jupyter_port=local_jupyter_port, jupyter_token=jupyter_token.rstrip())
                        if state.get('user_folder'):
                            msg += "&file-browser-path={}".format(state.get('user_folder'))
                    if vscode_port:
                        msg += '\nVSCode server available at http://localhost:{local_vscode_port}/'.format(
                            local_vscode_port=local_vscode_port)
                        if state.get('user_folder'):
                            msg += "?folder={}".format(state.get('user_folder'))
                    print(msg)
                    print(connect_message)
                else:
                    logging.getLogger().warning('SSH tunneling failed, retrying in {} seconds'.format(3))
                    sleep(3.)
                    continue

            connect_state['reconnect'] = False

            # if interactive start with SSH interactive
            if state.pop('shell', None):
                interactive_ssh(ssh_process)
                # if we are in --shell, when we leave the session we should leave the process
                break

            # wait for user input
            user_input = _read_std_input(timeout=sleep_period)
            if user_input is None:
                # noinspection PyBroadException
                try:
                    # check open connections
                    proc = psutil.Process(ssh_process.pid)
                    open_ports = [p.laddr.port for p in proc.connections(kind='tcp4') if p.status == 'LISTEN']
                    remote_ports = [p.raddr.port for p in proc.connections(kind='tcp4') if p.status == 'ESTABLISHED']
                    if (state.get('jupyter_lab') and int(local_jupyter_port_) not in open_ports) or \
                            int(local_ssh_port_) not in open_ports or \
                            int(ssh_port) not in remote_ports:
                        connect_state['reconnect'] = True
                except Exception:
                    pass
                continue

            if not user_input:
                print(short_console_msg)
                continue
            elif user_input.lower() in ('s', 'shell',):
                interactive_ssh(ssh_process)
                continue
            elif user_input.lower() == 'shutdown':
                print('Shutting down interactive session')
                task.mark_stopped()
                shutdown = True
                break
            elif user_input.lower() in ('r', 'reconnect', ):
                print('Reconnecting to interactive session')
                # noinspection PyBroadException
                try:
                    ssh_process.close(**({'force': True} if sys.platform != 'win32' else {}))
                except Exception:
                    pass
            elif user_input.lower() in ('q', 'quit',):
                raise KeyboardInterrupt()
            else:
                print('unknown command: \'{}\''.format(user_input))

        print("Remote session shutdown" if shutdown else "Remote session still running!")
    except KeyboardInterrupt:
        print('\nUser aborted')

    # kill the ssh process
    # noinspection PyBroadException
    try:
        ssh_process.close(**({'force': True} if sys.platform != 'win32' else {}))
    except Exception:
        pass
    # noinspection PyBroadException
    try:
        ssh_process.kill(9 if sys.platform != 'win32' else 15)
    except Exception:
        pass


def setup_parser(parser):
    parser.add_argument('--version', action='store_true', default=None,
                        help='Display the clearml-session utility version')
    parser.add_argument('--attach', default=False, nargs='?',
                        help='Attach to running interactive session (default: previous session)')
    parser.add_argument("--shutdown", "-S", default=None, const="", nargs="?",
                        help="Shut down an active session (default: previous session)")
    parser.add_argument("--shell", action='store_true', default=None,
                        help="Open the SSH shell session directly, notice quiting the SSH session "
                             "will Not shutdown the remote session")
    parser.add_argument('--debugging-session', type=str, default=None,
                        help='Pass existing Task id (experiment), create a copy of the experiment on a remote machine, '
                             'and launch jupyter/ssh for interactive access. Example --debugging-session <task_id>')
    parser.add_argument('--queue', type=str, default=None,
                        help='Select the queue to launch the interactive session on (default: previously used queue)')
    parser.add_argument('--docker', type=str, default=None,
                        help='Select the docker image to use in the interactive session on '
                             '(default: previously used docker image or `{}`)'.format(default_docker_image))
    parser.add_argument('--docker-args', type=str, default=None,
                        help='Add additional arguments for the docker image to use in the interactive session on '
                             '(default: previously used docker-args)')
    parser.add_argument('--public-ip', default=None, nargs='?', const='true', metavar='true/false',
                        type=lambda x: (str(x).strip().lower() in ('true', 'yes')),
                        help='If True register the public IP of the remote machine. Set if running on the cloud. '
                             'Default: false (use for local / on-premises)')
    parser.add_argument('--remote-ssh-port', type=str, default=None,
                        help='Set the remote ssh server port, running on the agent`s machine. (default: 10022)')
    parser.add_argument('--vscode-server', default=True, nargs='?', const='true', metavar='true/false',
                        type=lambda x: (str(x).strip().lower() in ('true', 'yes')),
                        help='Install vscode server (code-server) on interactive session (default: true)')
    parser.add_argument('--vscode-version', type=str, default=None,
                        help='Set vscode server (code-server) version, as well as vscode python extension version '
                             '<vscode:python-ext> (example: "3.7.4:2020.10.332292344")')
    parser.add_argument('--vscode-extensions', type=str, default=None,
                        help='Install additional vscode extensions, as well as vscode python extension '
                             '(example: "ms-python.python,ms-python.black-formatter,'
                             'ms-python.pylint,ms-python.flake8")')
    parser.add_argument('--jupyter-lab', default=True, nargs='?', const='true', metavar='true/false',
                        type=lambda x: (str(x).strip().lower() in ('true', 'yes')),
                        help='Install Jupyter-Lab on interactive session (default: true)')
    parser.add_argument('--upload-files', type=str, default=None,
                        help='Advanced: Upload local files/folders to the remote session. '
                             'Example: `/my/local/data/` will upload the local folder and extract it '
                             'into the container in ~/session-files/')
    parser.add_argument('--git-credentials', default=False, nargs='?', const='true', metavar='true/false',
                        type=lambda x: (str(x).strip().lower() in ('true', 'yes')),
                        help='If true, local .git-credentials file is sent to the interactive session. '
                             '(default: false)')
    parser.add_argument('--user-folder', type=str, default=None,
                        help='Advanced: Set the remote base folder (default: ~/)')
    parser.add_argument('--packages', type=str, nargs='*',
                        help='Additional packages to add, supports version numbers '
                             '(default: previously added packages). '
                             'examples: --packages torch==1.7 tqdm')
    parser.add_argument('--requirements', type=FileType('r'), default=None,
                        help='Specify requirements.txt file to install when setting the interactive session. '
                             'Requirements file is read and stored in `packages` section as default for '
                             'the next sessions. Can be overridden by calling `--packages`')
    parser.add_argument('--init-script', type=FileType('r'), default=False, nargs='?',
                        help='Specify BASH init script file to be executed when setting the interactive session. '
                             'Script content is read and stored as default script for the next sessions. '
                             'To clear the init-script do not pass a file')
    parser.add_argument('--config-file', type=str, default='~/.clearml_session.json',
                        help='Advanced: Change the configuration file used to store the previous state '
                             '(default: ~/.clearml_session.json)')
    parser.add_argument('--remote-gateway', default=None, nargs='?',
                        help='Advanced: Specify gateway ip/address:port to be passed to interactive session '
                             '(for use with k8s ingestion / ELB)')
    parser.add_argument('--base-task-id', type=str, default=None,
                        help='Advanced: Set the base task ID for the interactive session. '
                             '(default: previously used Task). Use `none` for the default interactive session')
    parser.add_argument('--project', type=str, default=None,
                        help='Advanced: Set the project name for the interactive session Task')
    parser.add_argument('--keepalive', default=False, nargs='?', const='true', metavar='true/false',
                        type=lambda x: (str(x).strip().lower() in ('true', 'yes')),
                        help='Advanced: If set, enables the transparent proxy always keeping the sockets alive. '
                             'Default: False, do not use transparent socket for mitigating connection drops.')
    parser.add_argument('--queue-excluded-tag', default=None, nargs='*',
                        help='Advanced: Excluded queues with this specific tag from the selection')
    parser.add_argument('--queue-include-tag', default=None, nargs='*',
                        help='Advanced: Only include queues with this specific tag from the selection')
    parser.add_argument('--skip-docker-network',  default=None, nargs='?', const='true', metavar='true/false',
                        type=lambda x: (str(x).strip().lower() in ('true', 'yes')),
                        help='Advanced: If set, `--network host` is **not** passed to docker '
                             '(assumes k8s network ingestion) (default: false)')
    parser.add_argument('--password', type=str, default=None,
                        help='Advanced: Select ssh password for the interactive session '
                             '(default: `randomly-generated` or previously used one)')
    parser.add_argument('--username', type=str, default=None,
                        help='Advanced: Select ssh username for the interactive session '
                             '(default: `root` or previously used one)')
    parser.add_argument('--force_dropbear', default=None, nargs='?', const='true', metavar='true/false',
                        type=lambda x: (str(x).strip().lower() in ('true', 'yes')),
                        help='Force using `dropbear` instead of SSHd')
    parser.add_argument('--verbose', action='store_true', default=None,
                        help='Advanced: If set, print verbose progress information, '
                             'e.g. the remote machine setup process log')
    parser.add_argument('--yes', '-y',
                        action='store_true', default=False,
                        help='Automatic yes to prompts; assume \"yes\" as answer '
                             'to all prompts and run non-interactively',)


def get_version():
    from .version import __version__
    return __version__


def cli():
    title = 'clearml-session - CLI for launching JupyterLab / VSCode on a remote machine'
    print(title)
    parser = ArgumentParser(
        prog='clearml-session', description=title,
        epilog='Notice! all arguments are stored as new defaults for the next session')
    setup_parser(parser)

    # get the args
    args = parser.parse_args()

    if args.version:
        print('Version {}'.format(get_version()))
        exit(0)

    # check ssh
    if not _check_ssh_executable():
        raise ValueError("Could not locate SSH executable")

    # check clearml.conf
    if not _check_configuration():
        raise ValueError("ClearML configuration not found. Please run `clearml-init`")

    # load previous state
    state_file = os.path.abspath(os.path.expandvars(os.path.expanduser(args.config_file)))
    state = load_state(state_file)

    if args.verbose:
        state['verbose'] = args.verbose

    state['shell'] = bool(args.shell)

    client = APIClient()

    if args.shutdown is not None:
        task = _get_previous_session(
            client, args, state, task_id=args.shutdown, verb="Shutting down",
            question_verb="Shut down", ask_for_explicit_id=True
        )
        if not task:
            print("No session to shut down, exiting")
            return 1
        task.mark_stopped()
        print("Session #{} shut down, goodbye!".format(task.id))
        return 0

    # check if upload folder/files exist
    if args.upload_files:
        if not Path(args.upload_files).expanduser().exists():
            print("Requested file/folder `{}` does not exist, exiting".format(args.upload_files))
            return 1

    # get previous session, if it is running
    task = _get_previous_session(client, args, state, task_id=args.attach)

    if task:
        state['task_id'] = task.id
        save_state(state, state_file)
        if args.username:
            state['username'] = args.username
        if args.password:
            state['password'] = args.password
    else:
        state.pop('task_id', None)
        save_state(state, state_file)

        print('Verifying credentials')

        # update state with new args
        # and make sure we have all the required fields
        state = get_user_inputs(args, parser, state, client)

        # save state
        save_state(state, state_file)

        # remove old Tasks created by us.
        delete_old_tasks(state, client, state.get('base_task_id'))

        # Clone the Task and adjust parameters
        task = clone_task(state)
        state['task_id'] = task.id
        save_state(state, state_file)

        # launch
        Task.enqueue(task=task, queue_name=state['queue'])

    # wait for machine to become available
    try:
        wait_for_machine(state, task)
    except ValueError as ex:
        print('\nERROR: {}'.format(ex))
        return 1

    # launch ssh tunnel
    monitor_ssh_tunnel(state, task)

    # we are done
    print('Goodbye')


def _get_previous_session(
    client, args, state, task_id=None, verb="Connecting to", question_verb="Connect to", ask_for_explicit_id=False
):
    assume_yes = args.yes
    if task_id:
        print('Checking session #{}'.format(task_id))
        try:
            task = Task.get_task(task_id=task_id)
        except ValueError:
            task = None
        status = task.get_status() if task else None
        if status == 'in_progress':
            if not args.debugging_session or task.parent == args.debugging_session:
                if assume_yes or not ask_for_explicit_id:
                    print("{} active session id={}".format(verb, task_id))
                    return task
                choice = input("{} active session id={} [Y]/n? ".format(question_verb, task_id))
                if str(choice).strip().lower() in ("y", "yes"):
                    return task
                return None
        raise ValueError('Could not connect to requested session id={} - status \'{}\''.format(
            task_id, status or 'Not Found'))

    # let's see if we have any other running sessions
    running_task_ids_created = _get_running_tasks(client, state.get('task_id'))
    if not running_task_ids_created:
        return None

    if args.debugging_session:
        running_task_ids_created = [t for t in running_task_ids_created if t[2] == args.debugging_session]
        if not running_task_ids_created:
            print('No active task={} debugging session found'.format(args.debugging_session))
            return None

    # a single running session
    if len(running_task_ids_created) == 1:
        task_id = running_task_ids_created[0][0]
        if assume_yes:
            print("{} active session {}".format(verb, task_id))
        else:
            choice = input("{} active session id={} [Y]/n? ".format(question_verb, task_id))
            if str(choice).strip().lower() in ("", "y", "yes"):
                return Task.get_task(task_id=task_id)

    # multiple sessions running
    print("{} active session:".format(verb))
    try:
        prev_task_id = state.get('task_id')
        default_i = next(i for i, (tid, _, _) in enumerate(running_task_ids_created) if prev_task_id == tid)
    except StopIteration:
        default_i = None

    session_list = "\n".join(
        "{}{}] {} id={}".format(i, "*" if i == default_i else "", dt.strftime("%Y-%m-%d %H:%M:%S"), tid)
        for i, (tid, dt, _) in enumerate(running_task_ids_created)
    )
    if assume_yes:
        choice = 0
    else:
        while True:
            try:
                choice = input(
                    session_list
                    + "\n{} session [{}] or 'N' to skip: ".format(
                        question_verb,
                        "0" if len(running_task_ids_created) <= 1 else "0-{}".format(len(running_task_ids_created) - 1)
                    )
                )
                if choice.strip().lower().startswith("n"):
                    choice = None
                elif default_i is not None and not choice.strip():
                    choice = default_i
                else:
                    choice = int(choice)
                    assert 0 <= choice < len(running_task_ids_created)
                break
            except (TypeError, ValueError, AssertionError):
                pass
    if choice is None:
        return None
    return Task.get_task(task_id=running_task_ids_created[choice][0])


def main():
    try:
        cli()
    except KeyboardInterrupt:
        print('\nUser aborted')
    except Exception as ex:
        print('\nError: {}'.format(ex))
        exit(1)


if __name__ == '__main__':
    main()