Accepting request 924948 from home:bnavigator:branches:devel:languages:python

- Add disable-RustExtension.patch in order to avoid a build
  requirement setuptools_rust
- Next version (35.0) needs a full Rust toolchain.
- Clean runtime, build and test requirements
- Disable python2 build: Not supported anymore

OBS-URL: https://build.opensuse.org/request/show/924948
OBS-URL: https://build.opensuse.org/package/show/devel:languages:python/python-cryptography?expand=0&rev=139

disable-RustExtension.patch

@@ -0,0 +1,49 @@
+Index: cryptography-3.4.8/setup.py
+===================================================================
+--- cryptography-3.4.8.orig/setup.py
++++ cryptography-3.4.8/setup.py
+@@ -13,18 +13,9 @@ from setuptools import find_packages, se
+ try:
+     from setuptools_rust import RustExtension
+ except ImportError:
+-    print(
+-        """
+-        =============================DEBUG ASSISTANCE==========================
+-        If you are seeing an error here please try the following to
+-        successfully install cryptography:
+-
+-        Upgrade to the latest pip and try again. This will fix errors for most
+-        users. See: https://pip.pypa.io/en/stable/installing/#upgrading-pip
+-        =============================DEBUG ASSISTANCE==========================
+-        """
+-    )
+-    raise
++    print("Could not find setuptools_rust."
++          "Set CRYPTOGRAPHY_DONT_BUILD_RUST in order to not build with Rust")
++    RustExtension = None
+ 
+ 
+ base_dir = os.path.dirname(__file__)
+@@ -41,9 +32,9 @@ with open(os.path.join(src_dir, "cryptog
+ 
+ # `install_requirements` and `setup_requirements` must be kept in sync with
+ # `pyproject.toml`
+-setuptools_rust = "setuptools-rust>=0.11.4"
++setuptools_rust = ["setuptools-rust>=0.11.4"] if RustExtension else []
+ install_requirements = ["cffi>=1.12"]
+-setup_requirements = install_requirements + [setuptools_rust]
++setup_requirements = install_requirements + setuptools_rust
+ 
+ if os.environ.get("CRYPTOGRAPHY_DONT_BUILD_RUST"):
+     rust_extensions = []
+@@ -129,9 +120,7 @@ try:
+                 "twine >= 1.12.0",
+                 "sphinxcontrib-spelling >= 4.0.1",
+             ],
+-            "sdist": [
+-                setuptools_rust,
+-            ],
++            "sdist": setuptools_rust,
+             "pep8test": [
+                 "black",
+                 "flake8",