old_contents: # Copyright (c) 2014-present PlatformIO <contact@platformio.org>
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #    http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  # pylint: disable=keyword-arg-before-vararg,arguments-differ,signature-differs
  
  import os
  import socket
  
  import requests
  from twisted.internet import defer  # pylint: disable=import-error
  from twisted.internet import reactor  # pylint: disable=import-error
  from twisted.internet import threads  # pylint: disable=import-error
  
  from platformio import util
  from platformio.proc import where_is_program
  
  
  class AsyncSession(requests.Session):
      def __init__(self, n=None, *args, **kwargs):
          if n:
              pool = reactor.getThreadPool()
              pool.adjustPoolsize(0, n)
  
          super(AsyncSession, self).__init__(*args, **kwargs)
  
      def request(self, *args, **kwargs):
          func = super(AsyncSession, self).request
          return threads.deferToThread(func, *args, **kwargs)
  
      def wrap(self, *args, **kwargs):  # pylint: disable=no-self-use
          return defer.ensureDeferred(*args, **kwargs)
  
  
  @util.memoized(expire="60s")
  def requests_session():
      return AsyncSession(n=5)
  
  
  @util.memoized(expire="60s")
  def get_core_fullpath():
      return where_is_program(
          "platformio" + (".exe" if "windows" in util.get_systype() else "")
      )
  
  
  @util.memoized(expire="10s")
  def is_twitter_blocked():
      ip = "104.244.42.1"
      timeout = 2
      try:
          if os.getenv("HTTP_PROXY", os.getenv("HTTPS_PROXY")):
              requests.get("http://%s" % ip, allow_redirects=False, timeout=timeout)
          else:
              socket.socket(socket.AF_INET, socket.SOCK_STREAM).connect((ip, 80))
          return False
      except:  # pylint: disable=bare-except
          pass
      return True
  
new_contents: # Copyright (c) 2014-present PlatformIO <contact@platformio.org>
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #    http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  # pylint: disable=keyword-arg-before-vararg,arguments-differ,signature-differs
  
  import requests
  from twisted.internet import defer  # pylint: disable=import-error
  from twisted.internet import reactor  # pylint: disable=import-error
  from twisted.internet import threads  # pylint: disable=import-error
  
  from platformio import util
  from platformio.proc import where_is_program
  
  
  class AsyncSession(requests.Session):
      def __init__(self, n=None, *args, **kwargs):
          if n:
              pool = reactor.getThreadPool()
              pool.adjustPoolsize(0, n)
  
          super(AsyncSession, self).__init__(*args, **kwargs)
  
      def request(self, *args, **kwargs):
          func = super(AsyncSession, self).request
          return threads.deferToThread(func, *args, **kwargs)
  
      def wrap(self, *args, **kwargs):  # pylint: disable=no-self-use
          return defer.ensureDeferred(*args, **kwargs)
  
  
  @util.memoized(expire="60s")
  def requests_session():
      return AsyncSession(n=5)
  
  
  @util.memoized(expire="60s")
  def get_core_fullpath():
      return where_is_program(
          "platformio" + (".exe" if "windows" in util.get_systype() else "")
      )
  
subject: Remove unused code