-_use_old_Twisted_and_Nevow = False
-if sys.platform == "win32":
- try:
- import win32api
- [win32api]
- except ImportError:
- _use_old_Twisted_and_Nevow = True
-
-if _use_old_Twisted_and_Nevow:
- install_requires += [
- "Twisted >= 11.1.0, <= 12.1.0",
- "Nevow >= 0.9.33, <= 0.10",
- ]
- setup_requires += [req for req in install_requires if req.startswith('Twisted')
- or req.startswith('zope.interface')]
-else:
- install_requires += [
- "Twisted >= 13.0.0",
- "Nevow >= 0.11.1",
- ]
-
-
-# * pyOpenSSL is required in order for foolscap to provide secure connections.
-# Since foolscap doesn't reliably declare this dependency in a machine-readable
-# way, we need to declare a dependency on pyOpenSSL ourselves. Tahoe-LAFS does
-# not *directly* depend on pyOpenSSL.
-#
-# * pyOpenSSL >= 0.13 is needed in order to avoid
-# <https://tahoe-lafs.org/trac/tahoe-lafs/ticket/2005>, and also to check the
-# version of OpenSSL that pyOpenSSL is using.
-#
-# * pyOpenSSL >= 0.14 is built on the 'cryptography' package which depends
-# on 'cffi' (and indirectly several other packages). Unfortunately cffi
-# attempts to compile code dynamically, which causes problems on many systems.
-# It also depends on the libffi OS package which may not be installed.
-# <https://bitbucket.org/cffi/cffi/issue/109/enable-sane-packaging-for-cffi>
-# <https://bitbucket.org/cffi/cffi/issue/70/cant-install-cffi-using-pip-on-windows>
-#
-# So, if pyOpenSSL 0.14 has *already* been installed and is importable, we
-# want to accept it; otherwise we ask for pyOpenSSL 0.13 or 0.13.1.
-# <https://tahoe-lafs.org/trac/tahoe-lafs/ticket/2193>
-#
-# We don't rely on pkg_resources to tell us the installed pyOpenSSL version
-# number, because pkg_resources telling us that we have 0.14 is not sufficient
-# evidence that 0.14 will be the imported version (or will work correctly).
-# One possible reason why it might not be is explained in
-# <https://tahoe-lafs.org/trac/tahoe-lafs/ticket/1246#comment:6> and
-# <https://tahoe-lafs.org/trac/tahoe-lafs/ticket/1258>.
-
-_can_use_pyOpenSSL_0_14 = False
-try:
- import OpenSSL
- pyOpenSSL_ver = OpenSSL.__version__.split('.')
- if int(pyOpenSSL_ver[0]) > 0 or int(pyOpenSSL_ver[1]) >= 14:
- _can_use_pyOpenSSL_0_14 = True
-except Exception:
- pass
-
-if _can_use_pyOpenSSL_0_14:
- install_requires += [
- # Although we checked for pyOpenSSL >= 0.14 above, we only actually
- # need pyOpenSSL >= 0.13; requiring 0.14 here cannot help.
- "pyOpenSSL >= 0.13",
-
- # ... and now all the new stuff that pyOpenSSL 0.14 transitively
- # depends on. We specify these explicitly because setuptools is
- # bad at correctly resolving indirect dependencies (e.g. see
- # <https://tahoe-lafs.org/trac/tahoe-lafs/ticket/2286>).
- #
- "cryptography",
- "cffi >= 0.8", # latest cryptography depends on this version
- "six >= 1.4.1", # latest cryptography depends on this version
- "enum34", # latest cryptography depends on this
- "pycparser", # cffi depends on this
- ]
-
- package_imports += [
- ('cryptography', 'cryptography'),
- ('cffi', 'cffi'),
- ('six', 'six'),
- ('enum34', 'enum'),
- ('pycparser', 'pycparser'),
- ]
-else:
- install_requires += [
- "pyOpenSSL >= 0.13, <= 0.13.1",
- ]
-