1 files changed, 45 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/development/python-modules/cffi/default.nix b/nixpkgs/pkgs/development/python-modules/cffi/default.nix
new file mode 100644
index 000000000000..7eca740953f8
--- /dev/null
+++ b/nixpkgs/pkgs/development/python-modules/cffi/default.nix
@@ -0,0 +1,45 @@
+{ stdenv, buildPythonPackage, isPyPy, fetchPypi, libffi, pycparser, pytest }:
+
+if isPyPy then null else buildPythonPackage rec {
+  pname = "cffi";
+  version = "1.12.1";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "9b6f7ba4e78c52c1a291d0c0c0bd745d19adde1a9e1c03cb899f0c6efd6f8033";
+  };
+
+  outputs = [ "out" "dev" ];
+
+  propagatedBuildInputs = [ libffi pycparser ];
+  checkInputs = [ pytest ];
+
+  # On Darwin, the cffi tests want to hit libm a lot, and look for it in a global
+  # impure search path. It's obnoxious how much repetition there is, and how difficult
+  # it is to get it to search somewhere else (since we do actually have a libm symlink in libSystem)
+  prePatch = stdenv.lib.optionalString stdenv.isDarwin ''
+    substituteInPlace testing/cffi0/test_parsing.py \
+      --replace 'lib_m = "m"' 'lib_m = "System"' \
+      --replace '"libm" in name' '"libSystem" in name'
+    substituteInPlace testing/cffi0/test_unicode_literals.py --replace 'lib_m = "m"' 'lib_m = "System"'
+    substituteInPlace testing/cffi0/test_zdistutils.py --replace 'self.lib_m = "m"' 'self.lib_m = "System"'
+    substituteInPlace testing/cffi1/test_recompiler.py --replace 'lib_m = "m"' 'lib_m = "System"'
+    substituteInPlace testing/cffi0/test_function.py --replace "lib_m = 'm'" "lib_m = 'System'"
+    substituteInPlace testing/cffi0/test_verify.py --replace "lib_m = ['m']" "lib_m = ['System']"
+  '';
+
+  # The tests use -Werror but with python3.6 clang detects some unreachable code.
+  NIX_CFLAGS_COMPILE = stdenv.lib.optionals stdenv.cc.isClang [ "-Wno-unused-command-line-argument" "-Wno-unreachable-code" ];
+
+  doCheck = !stdenv.hostPlatform.isMusl; # TODO: Investigate
+  checkPhase = ''
+    py.test -k "not test_char_pointer_conversion"
+  '';
+
+  meta = with stdenv.lib; {
+    maintainers = with maintainers; [ domenkozar lnl7 ];
+    homepage = https://cffi.readthedocs.org/;
+    license = with licenses; [ mit ];
+    description = "Foreign Function Interface for Python calling C code";
+  };
+}