| import os | |
| import site | |
| import sys | |
| from distutils.sysconfig import get_python_lib | |
| from setuptools import setup | |
| # Allow editable install into user site directory. | |
| # See https://github.com/pypa/pip/issues/7953. | |
| site.ENABLE_USER_SITE = "--user" in sys.argv[1:] | |
| # Warn if we are installing over top of an existing installation. This can | |
| # cause issues where files that were deleted from a more recent Django are | |
| # still present in site-packages. See #18115. | |
| overlay_warning = False | |
| if "install" in sys.argv: | |
| lib_paths = [get_python_lib()] | |
| if lib_paths[0].startswith("/usr/lib/"): | |
| # We have to try also with an explicit prefix of /usr/local in order to | |
| # catch Debian's custom user site-packages directory. | |
| lib_paths.append(get_python_lib(prefix="/usr/local")) | |
| for lib_path in lib_paths: | |
| existing_path = os.path.abspath(os.path.join(lib_path, "django")) | |
| if os.path.exists(existing_path): | |
| # We note the need for the warning here, but present it after the | |
| # command is run, so it's more likely to be seen. | |
| overlay_warning = True | |
| break | |
| setup() | |
| if overlay_warning: | |
| sys.stderr.write( | |
| """ | |
| ======== | |
| WARNING! | |
| ======== | |
| You have just installed Django over top of an existing | |
| installation, without removing it first. Because of this, | |
| your install may now include extraneous files from a | |
| previous version that have since been removed from | |
| Django. This is known to cause a variety of problems. You | |
| should manually remove the | |
| %(existing_path)s | |
| directory and re-install Django. | |
| """ | |
| % {"existing_path": existing_path} | |
| ) | |