系統環境
Python：2.7.5
django-haystack：2.8.1
遇到的問題
重新部署一個使用Python2開發的項目，使用默認源安裝時，有安裝進度但報錯：
$ pip install django-haystack==2.8.1
DEPRECATION: Python 2.7 reached the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 is no longer maintained. A future version of pip will drop support for Python 2.7. More details about Python 2 support in pip, can be found at https://pip.pypa.io/en/latest/development/release-process/#python-2-support
Looking in indexes: http://172.18.0.62/pypi/simple/
Collecting django-haystack==2.8.1
Downloading http://172.18.0.62/pypi/packages/69/43/3e247b7b2134b48e9a53fb387e191e5e05b5f38f2faf78ca892097c2b441/django-haystack-2.8.1.tar.gz (1.6 MB)
|████████████████████████████████| 1.6 MB 4.7 MB/s
ERROR: Command errored out with exit status 1:
command: /root/.virtualenvs/THCMPHelpCenter/bin/python2.7 -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-xYf4n0/django-haystack/setup.py'"'"'; __file__='"'"'/tmp/pip-install-xYf4n0/django-haystack/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' egg_info --egg-base /tmp/pip-install-xYf4n0/django-haystack/pip-egg-info
cwd: /tmp/pip-install-xYf4n0/django-haystack/
Complete output (25 lines):
DEPRECATION: Python 2.7 reached the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 is no longer maintained. A future version of pip will drop support for Python 2.7. More details about Python 2 support in pip, can be found at https://pip.pypa.io/en/latest/development/release-process/#python-2-support
WARNING: The repository located at 172.18.0.62 is not a trusted or secure host and is being ignored. If this repository is available via HTTPS we recommend you use HTTPS instead, otherwise you may silence this warning and allow it anyway with '--trusted-host 172.18.0.62'.
ERROR: Could not find a version that satisfies the requirement setuptools_scm (from versions: none)
ERROR: No matching distribution found for setuptools_scm
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "/tmp/pip-install-xYf4n0/django-haystack/setup.py", line 71, in <module>
setup_requires=['setuptools_scm'],
File "/root/.virtualenvs/THCMPHelpCenter/lib/python2.7/site-packages/setuptools/__init__.py", line 144, in setup
_install_setup_requires(attrs)
File "/root/.virtualenvs/THCMPHelpCenter/lib/python2.7/site-packages/setuptools/__init__.py", line 139, in _install_setup_requires
dist.fetch_build_eggs(dist.setup_requires)
File "/root/.virtualenvs/THCMPHelpCenter/lib/python2.7/site-packages/setuptools/dist.py", line 721, in fetch_build_eggs
replace_conflicting=True,
File "/root/.virtualenvs/THCMPHelpCenter/lib/python2.7/site-packages/pkg_resources/__init__.py", line 782, in resolve
replace_conflicting=replace_conflicting
File "/root/.virtualenvs/THCMPHelpCenter/lib/python2.7/site-packages/pkg_resources/__init__.py", line 1065, in best_match
return self.obtain(req, installer)
File "/root/.virtualenvs/THCMPHelpCenter/lib/python2.7/site-packages/pkg_resources/__init__.py", line 1077, in obtain
return installer(requirement)
File "/root/.virtualenvs/THCMPHelpCenter/lib/python2.7/site-packages/setuptools/dist.py", line 777, in fetch_build_egg
return fetch_build_egg(self, req)
File "/root/.virtualenvs/THCMPHelpCenter/lib/python2.7/site-packages/setuptools/installer.py", line 130, in fetch_build_egg
raise DistutilsError(str(e))
distutils.errors.DistutilsError: Command '['/root/.virtualenvs/THCMPHelpCenter/bin/python2.7', '-m', 'pip', '--disable-pip-version-check', 'wheel', '--no-deps', '-w', '/tmp/tmpyA0zVE', '--quiet', 'setuptools_scm']' returned non-zero exit status 1
----------------------------------------
ERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.
錯誤原因
setuptools版本過低，或缺少依賴的下載工具setuptools-scm
解決方法
如果是因爲setuptools版本過低，就升級版本：
$ pip install --upgrade setuptools
如果升級後依然報錯，就安裝setuptools-scm
$ pip install setuptools_scm
之後重新安裝django-haystack，成功：
pip install django-haystack==2.8.1
DEPRECATION: Python 2.7 reached the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 is no longer maintained. A future version of pip will drop support for Python 2.7. t Python 2 support in pip, can be found at https://pip.pypa.io/en/latest/development/release-process/#python-2-support
Looking in indexes: http://172.18.0.62/pypi/simple/
Collecting django-haystack==2.8.1
Downloading http://172.18.0.62/pypi/packages/69/43/3e247b7b2134b48e9a53fb387e191e5e05b5f38f2faf78ca892097c2b441/django-haystack-2.8.1.tar.gz (1.6 MB)
|████████████████████████████████| 1.6 MB 2.9 MB/s
Requirement already satisfied: Django>=1.11 in /root/.virtualenvs/THCMPHelpCenter/lib/python2.7/site-packages (from django-haystack==2.8.1) (1.11.29)
Requirement already satisfied: pytz in /root/.virtualenvs/THCMPHelpCenter/lib/python2.7/site-packages (from Django>=1.11->django-haystack==2.8.1) (2019.3)
Building wheels for collected packages: django-haystack
Building wheel for django-haystack (setup.py) ... done
Created wheel for django-haystack: filename=django_haystack-2.8.1-py2-none-any.whl size=131002 sha256=c4ed6d0f3b31377bd0be7ea97afbedf51e5a1dccb430e3b1dc4c80c7f60e3e7f
Stored in directory: /root/.cache/pip/wheels/26/e1/87/e5b97c5111704b6145052f3d9ba5f6b030200edec6c42c76f1
Successfully built django-haystack
Installing collected packages: django-haystack
Successfully installed django-haystack-2.8.1
其它問題
不知道是不是因爲2020年1月1日起官方不再支持Python2，還是機器代理設置的原因，在搭環境的時候還遇到了一些大大小小的問題，比如國內各種源都無法使用了，這也是爲什麼都2020年了，我還在用默認源裝module。（這個問題可能是代理設置的鍋，留存一下，以後有時間再研究）：
$ pip install django-haystack==2.8.1 -i https://mirrors.cloud.aliyuncs.com/pypi/simple/
DEPRECATION: Python 2.7 reached the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 is no longer maintained. A future version of pip will drop support for Python 2.7. More details about Python 2 support in pip, can be found at https://pip.pypa.io/en/latest/development/release-process/#python-2-support
Looking in indexes: https://mirrors.cloud.aliyuncs.com/pypi/simple/
WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.VerifiedHTTPSConnection object at 0x2427810>: Failed to establish a new connection: [Errno -2] Name or service not known',)': /pypi/simple/django-haystack/
WARNING: Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.VerifiedHTTPSConnection object at 0x242d090>: Failed to establish a new connection: [Errno -2] Name or service not known',)': /pypi/simple/django-haystack/
WARNING: Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.VerifiedHTTPSConnection object at 0x242d210>: Failed to establish a new connection: [Errno -2] Name or service not known',)': /pypi/simple/django-haystack/
WARNING: Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.VerifiedHTTPSConnection object at 0x242d350>: Failed to establish a new connection: [Errno -2] Name or service not known',)': /pypi/simple/django-haystack/
WARNING: Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.VerifiedHTTPSConnection object at 0x242d4d0>: Failed to establish a new connection: [Errno -2] Name or service not known',)': /pypi/simple/django-haystack/
ERROR: Could not find a version that satisfies the requirement django-haystack==2.8.1 (from versions: none)
ERROR: No matching distribution found for django-haystack==2.8.1