We are currently solving the following issue within our repository. Here is the issue text:
--- BEGIN ISSUE ---
setup.py install_requires should have `"click>=7"` not `"click>=6"`
Thank you for all the work on this tool, it's very useful.

Issue:
As of 4.4.0 pip-tools now depends on version 7.0 of click, not 6.0.

The argument `show_envvar` is now being passed to `click.option()`
https://github.com/jazzband/pip-tools/compare/4.3.0...4.4.0#diff-c8673e93c598354ab4a9aa8dd090e913R183

That argument was added in click 7.0
https://click.palletsprojects.com/en/7.x/api/#click.Option
compared to 
https://click.palletsprojects.com/en/6.x/api/#click.Option

Fix: setup.py install_requires should have `"click>=7"` not `"click>=6"`

--- END ISSUE ---

Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
--- BEGIN FILES ---
Path: `setup.py`
Content:
```
1 """
2 pip-tools keeps your pinned dependencies fresh.
3 """
4 from os.path import abspath, dirname, join
5 
6 from setuptools import find_packages, setup
7 
8 
9 def read_file(filename):
10     """Read the contents of a file located relative to setup.py"""
11     with open(join(abspath(dirname(__file__)), filename)) as thefile:
12         return thefile.read()
13 
14 
15 setup(
16     name="pip-tools",
17     use_scm_version=True,
18     url="https://github.com/jazzband/pip-tools/",
19     license="BSD",
20     author="Vincent Driessen",
21     author_email="me@nvie.com",
22     description=__doc__.strip(),
23     long_description=read_file("README.rst"),
24     long_description_content_type="text/x-rst",
25     packages=find_packages(exclude=["tests"]),
26     package_data={},
27     python_requires=">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*",
28     setup_requires=["setuptools_scm"],
29     install_requires=["click>=6", "six"],
30     zip_safe=False,
31     entry_points={
32         "console_scripts": [
33             "pip-compile = piptools.scripts.compile:cli",
34             "pip-sync = piptools.scripts.sync:cli",
35         ]
36     },
37     platforms="any",
38     classifiers=[
39         "Development Status :: 5 - Production/Stable",
40         "Intended Audience :: Developers",
41         "Intended Audience :: System Administrators",
42         "License :: OSI Approved :: BSD License",
43         "Operating System :: OS Independent",
44         "Programming Language :: Python",
45         "Programming Language :: Python :: 2",
46         "Programming Language :: Python :: 2.7",
47         "Programming Language :: Python :: 3",
48         "Programming Language :: Python :: 3.5",
49         "Programming Language :: Python :: 3.6",
50         "Programming Language :: Python :: 3.7",
51         "Programming Language :: Python :: 3.8",
52         "Programming Language :: Python :: Implementation :: CPython",
53         "Programming Language :: Python :: Implementation :: PyPy",
54         "Topic :: System :: Systems Administration",
55     ],
56 )
57
```
--- END FILES ---

Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.

Here is an example:

```diff
diff --git a/examples/server_async.py b/examples/server_async.py
--- a/examples/server_async.py
+++ b/examples/server_async.py
@@ -313,4 +313,4 @@
 
 
 if __name__ == "__main__":
-    asyncio.run(run_async_server("."), debug=True)
+    asyncio.run(run_async_server(), debug=True)
diff --git a/examples/server_sync.py b/examples/server_sync.py
--- a/examples/server_sync.py
+++ b/examples/server_sync.py
@@ -313,5 +313,5 @@
 
 
 if __name__ == "__main__":
-    server = run_sync_server(".")
+    server = run_sync_server()
     server.shutdown()

```

diff --git a/setup.py b/setup.py
--- a/setup.py
+++ b/setup.py
@@ -26,7 +26,7 @@
     package_data={},
     python_requires=">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*",
     setup_requires=["setuptools_scm"],
-    install_requires=["click>=6", "six"],
+    install_requires=["click>=7", "six"],
     zip_safe=False,
     entry_points={
         "console_scripts": [

{"golden_diff": "diff --git a/setup.py b/setup.py\n--- a/setup.py\n+++ b/setup.py\n@@ -26,7 +26,7 @@\n     package_data={},\n     python_requires=\">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*\",\n     setup_requires=[\"setuptools_scm\"],\n-    install_requires=[\"click>=6\", \"six\"],\n+    install_requires=[\"click>=7\", \"six\"],\n     zip_safe=False,\n     entry_points={\n         \"console_scripts\": [\n", "issue": "setup.py install_requires should have `\"click>=7\"` not `\"click>=6\"`\nThank you for all the work on this tool, it's very useful.\r\n\r\nIssue:\r\nAs of 4.4.0 pip-tools now depends on version 7.0 of click, not 6.0.\r\n\r\nThe argument `show_envvar` is now being passed to `click.option()`\r\nhttps://github.com/jazzband/pip-tools/compare/4.3.0...4.4.0#diff-c8673e93c598354ab4a9aa8dd090e913R183\r\n\r\nThat argument was added in click 7.0\r\nhttps://click.palletsprojects.com/en/7.x/api/#click.Option\r\ncompared to \r\nhttps://click.palletsprojects.com/en/6.x/api/#click.Option\r\n\r\nFix: setup.py install_requires should have `\"click>=7\"` not `\"click>=6\"`\n", "before_files": [{"content": "\"\"\"\npip-tools keeps your pinned dependencies fresh.\n\"\"\"\nfrom os.path import abspath, dirname, join\n\nfrom setuptools import find_packages, setup\n\n\ndef read_file(filename):\n    \"\"\"Read the contents of a file located relative to setup.py\"\"\"\n    with open(join(abspath(dirname(__file__)), filename)) as thefile:\n        return thefile.read()\n\n\nsetup(\n    name=\"pip-tools\",\n    use_scm_version=True,\n    url=\"https://github.com/jazzband/pip-tools/\",\n    license=\"BSD\",\n    author=\"Vincent Driessen\",\n    author_email=\"me@nvie.com\",\n    description=__doc__.strip(),\n    long_description=read_file(\"README.rst\"),\n    long_description_content_type=\"text/x-rst\",\n    packages=find_packages(exclude=[\"tests\"]),\n    package_data={},\n    python_requires=\">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*\",\n    setup_requires=[\"setuptools_scm\"],\n    install_requires=[\"click>=6\", \"six\"],\n    zip_safe=False,\n    entry_points={\n        \"console_scripts\": [\n            \"pip-compile = piptools.scripts.compile:cli\",\n            \"pip-sync = piptools.scripts.sync:cli\",\n        ]\n    },\n    platforms=\"any\",\n    classifiers=[\n        \"Development Status :: 5 - Production/Stable\",\n        \"Intended Audience :: Developers\",\n        \"Intended Audience :: System Administrators\",\n        \"License :: OSI Approved :: BSD License\",\n        \"Operating System :: OS Independent\",\n        \"Programming Language :: Python\",\n        \"Programming Language :: Python :: 2\",\n        \"Programming Language :: Python :: 2.7\",\n        \"Programming Language :: Python :: 3\",\n        \"Programming Language :: Python :: 3.5\",\n        \"Programming Language :: Python :: 3.6\",\n        \"Programming Language :: Python :: 3.7\",\n        \"Programming Language :: Python :: 3.8\",\n        \"Programming Language :: Python :: Implementation :: CPython\",\n        \"Programming Language :: Python :: Implementation :: PyPy\",\n        \"Topic :: System :: Systems Administration\",\n    ],\n)\n", "path": "setup.py"}], "after_files": [{"content": "\"\"\"\npip-tools keeps your pinned dependencies fresh.\n\"\"\"\nfrom os.path import abspath, dirname, join\n\nfrom setuptools import find_packages, setup\n\n\ndef read_file(filename):\n    \"\"\"Read the contents of a file located relative to setup.py\"\"\"\n    with open(join(abspath(dirname(__file__)), filename)) as thefile:\n        return thefile.read()\n\n\nsetup(\n    name=\"pip-tools\",\n    use_scm_version=True,\n    url=\"https://github.com/jazzband/pip-tools/\",\n    license=\"BSD\",\n    author=\"Vincent Driessen\",\n    author_email=\"me@nvie.com\",\n    description=__doc__.strip(),\n    long_description=read_file(\"README.rst\"),\n    long_description_content_type=\"text/x-rst\",\n    packages=find_packages(exclude=[\"tests\"]),\n    package_data={},\n    python_requires=\">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*\",\n    setup_requires=[\"setuptools_scm\"],\n    install_requires=[\"click>=7\", \"six\"],\n    zip_safe=False,\n    entry_points={\n        \"console_scripts\": [\n            \"pip-compile = piptools.scripts.compile:cli\",\n            \"pip-sync = piptools.scripts.sync:cli\",\n        ]\n    },\n    platforms=\"any\",\n    classifiers=[\n        \"Development Status :: 5 - Production/Stable\",\n        \"Intended Audience :: Developers\",\n        \"Intended Audience :: System Administrators\",\n        \"License :: OSI Approved :: BSD License\",\n        \"Operating System :: OS Independent\",\n        \"Programming Language :: Python\",\n        \"Programming Language :: Python :: 2\",\n        \"Programming Language :: Python :: 2.7\",\n        \"Programming Language :: Python :: 3\",\n        \"Programming Language :: Python :: 3.5\",\n        \"Programming Language :: Python :: 3.6\",\n        \"Programming Language :: Python :: 3.7\",\n        \"Programming Language :: Python :: 3.8\",\n        \"Programming Language :: Python :: Implementation :: CPython\",\n        \"Programming Language :: Python :: Implementation :: PyPy\",\n        \"Topic :: System :: Systems Administration\",\n    ],\n)\n", "path": "setup.py"}]}