From 70fa4aabeb92d2880b00cf013587d9f0a041579a Mon Sep 17 00:00:00 2001
From: Kenneth Reitz <me@kennethreitz.org>
Date: Mon, 12 Mar 2018 09:04:52 -0400
Subject: [PATCH] remove background task, as it's problematic #1589

---
 pipenv/cli.py               |  4 +--
 pipenv/core.py              | 20 -------------
 pipenv/vendor/background.py | 60 -------------------------------------
 3 files changed, 1 insertion(+), 83 deletions(-)
 delete mode 100644 pipenv/vendor/background.py

diff --git a/pipenv/cli.py b/pipenv/cli.py
index 32df7c4a..c43c6fee 100644
--- a/pipenv/cli.py
+++ b/pipenv/cli.py
@@ -62,9 +62,7 @@ def cli(
     from . import core
 
     if not update:
-        if core.need_update_check():
-            # Spun off in background thread, not unlike magic.
-            core.check_for_updates()
+        pass
     else:
         # Update pip to latest version.
         core.ensure_latest_pip()
diff --git a/pipenv/core.py b/pipenv/core.py
index 516386c8..2ea4fddf 100644
--- a/pipenv/core.py
+++ b/pipenv/core.py
@@ -13,7 +13,6 @@ import tempfile
 from glob import glob
 import json as simplejson
 
-import background
 import click
 import click_completion
 import crayons
@@ -140,25 +139,6 @@ def add_to_path(p):
         os.environ['PATH'] = '{0}{1}{2}'.format(p, os.pathsep, os.environ['PATH'])
 
 
-@background.task
-def check_for_updates():
-    """Background thread -- beautiful, isn't it?"""
-    try:
-        touch_update_stamp()
-        r = requests.get('https://pypi.python.org/pypi/pipenv/json', timeout=0.5)
-        latest = max(map(semver.parse_version_info, r.json()['releases'].keys()))
-        current = semver.parse_version_info(__version__)
-
-        if latest > current:
-            click.echo('{0}: {1} is now available. You get bonus points for upgrading ($ {})!'.format(
-                crayons.green('Courtesy Notice'),
-                crayons.yellow('Pipenv {v.major}.{v.minor}.{v.patch}'.format(v=latest)),
-                crayons.red('pipenv --update')
-            ), err=True)
-    except Exception:
-        pass
-
-
 def ensure_latest_self(user=False):
     """Updates Pipenv to latest version, cleverly."""
     touch_update_stamp()
diff --git a/pipenv/vendor/background.py b/pipenv/vendor/background.py
deleted file mode 100644
index 5b513f60..00000000
--- a/pipenv/vendor/background.py
+++ /dev/null
@@ -1,60 +0,0 @@
-#!/usr/bin/env python
-# -*- coding:utf-8 -*-
-
-import sys
-import multiprocessing
-
-try:
-    if sys.version_info.major < 3:
-        import concurrent27.futures as concurrent
-    else:
-        import concurrent.futures as concurrent
-except ImportError:
-    pass
-
-
-
-def default_n():
-    return multiprocessing.cpu_count()
-
-n = default_n()
-
-if 'concurrent' in globals():
-    pool = concurrent.ThreadPoolExecutor(max_workers=n)
-else:
-    pool = None
-callbacks = []
-results = []
-
-
-def run(f, *args, **kwargs):
-
-    if pool:
-        pool._max_workers = n
-        pool._adjust_thread_count()
-
-        f = pool.submit(f, *args, **kwargs)
-    results.append(f)
-
-    return f
-
-
-def task(f, *args, **kwargs):
-    def do_task():
-        result = run(f, *args, **kwargs)
-        results.append(result)
-
-        for cb in callbacks:
-            result.add_done_callback(cb)
-
-        return result
-    return do_task
-
-
-def callback(f):
-    callbacks.append(f)
-
-    def register_callback():
-        f()
-
-    return register_callback
\ No newline at end of file