From a7a00824e44e38734e11c8894018d5327a21692a Mon Sep 17 00:00:00 2001
From: Andreas Fehn <fehnomenal@fehn.systems>
Date: Fri, 27 Nov 2020 09:28:35 +0100
Subject: [PATCH 1/2] maintainers: add fehnomenal

---
 maintainers/maintainer-list.nix | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/maintainers/maintainer-list.nix b/maintainers/maintainer-list.nix
index 2838f60ad00..e753fdf8d84 100644
--- a/maintainers/maintainer-list.nix
+++ b/maintainers/maintainer-list.nix
@@ -2885,6 +2885,12 @@
     githubId = 541748;
     name = "Felipe Espinoza";
   };
+  fehnomenal = {
+    email = "fehnomenal@fehn.systems";
+    github = "fehnomenal";
+    githubId = 9959940;
+    name = "Andreas Fehn";
+  };
   felschr = {
     email = "dev@felschr.com";
     github = "felschr";

From 68a379e36456b20629ed0edf2ce82c021c260548 Mon Sep 17 00:00:00 2001
From: Andreas Fehn <fehnomenal@fehn.systems>
Date: Fri, 27 Nov 2020 09:48:32 +0100
Subject: [PATCH 2/2] pythonPackages.ifcopenshell: init at 0.6.0b

---
 .../python-modules/ifcopenshell/default.nix   | 67 +++++++++++++++++++
 .../ifcopenshell/site-packages.patch          | 32 +++++++++
 pkgs/top-level/python-packages.nix            |  2 +
 3 files changed, 101 insertions(+)
 create mode 100644 pkgs/development/python-modules/ifcopenshell/default.nix
 create mode 100644 pkgs/development/python-modules/ifcopenshell/site-packages.patch

diff --git a/pkgs/development/python-modules/ifcopenshell/default.nix b/pkgs/development/python-modules/ifcopenshell/default.nix
new file mode 100644
index 00000000000..16ee8dcbace
--- /dev/null
+++ b/pkgs/development/python-modules/ifcopenshell/default.nix
@@ -0,0 +1,67 @@
+{ stdenv
+, buildPythonPackage
+, fetchFromGitHub
+, substituteAll
+, python
+, gcc10
+, cmake
+, boost172
+, icu
+, swig
+, pcre
+, opencascade-occt
+, opencollada
+, libxml2
+}:
+
+buildPythonPackage rec {
+  pname = "ifcopenshell";
+  version = "0.6.0b0";
+  format = "other";
+
+  src = fetchFromGitHub {
+    owner  = "IfcOpenShell";
+    repo   = "IfcOpenShell";
+    rev    = "v${version}";
+    fetchSubmodules = true;
+    sha256 = "1ad1s9az41z2f46rbi1jnr46mgc0q4h5kz1jm9xdlwifqv9y04g1";
+  };
+
+  patches = [
+    (substituteAll {
+      name = "site-packages.patch";
+      src = ./site-packages.patch;
+      site_packages = "lib/${python.libPrefix}/site-packages";
+    })
+  ];
+
+  nativeBuildInputs = [ gcc10 cmake ];
+
+  buildInputs = [
+    boost172
+    icu
+    pcre
+    libxml2
+  ];
+
+  preConfigure = ''
+    cd cmake
+  '';
+
+  cmakeFlags = [
+    "-DOCC_INCLUDE_DIR=${opencascade-occt}/include/opencascade"
+    "-DOCC_LIBRARY_DIR=${opencascade-occt}/lib"
+    "-DOPENCOLLADA_INCLUDE_DIR=${opencollada}/include/opencollada"
+    "-DOPENCOLLADA_LIBRARY_DIR=${opencollada}/lib/opencollada"
+    "-DSWIG_EXECUTABLE=${swig}/bin/swig"
+    "-DLIBXML2_INCLUDE_DIR=${libxml2.dev}/include/libxml2"
+    "-DLIBXML2_LIBRARIES=${libxml2.out}/lib/${if stdenv.isDarwin then "libxml2.dylib" else "libxml2.so"}"
+  ];
+
+  meta = with stdenv.lib; {
+    description = "Open source IFC library and geometry engine";
+    homepage    = http://ifcopenshell.org/;
+    license     = licenses.lgpl3;
+    maintainers = with maintainers; [ fehnomenal ];
+  };
+}
diff --git a/pkgs/development/python-modules/ifcopenshell/site-packages.patch b/pkgs/development/python-modules/ifcopenshell/site-packages.patch
new file mode 100644
index 00000000000..e61fe2056f7
--- /dev/null
+++ b/pkgs/development/python-modules/ifcopenshell/site-packages.patch
@@ -0,0 +1,32 @@
+--- a/src/ifcwrap/CMakeLists.txt
++++ b/src/ifcwrap/CMakeLists.txt
+@@ -68,26 +68,17 @@ endif()
+ # directory in which the wrapper can be installed.
+ FIND_PACKAGE(PythonInterp)
+ IF(PYTHONINTERP_FOUND AND NOT "${PYTHON_EXECUTABLE}" STREQUAL "")
+-    EXECUTE_PROCESS(
+-        COMMAND ${PYTHON_EXECUTABLE} -c "import sys; from distutils.sysconfig import get_python_lib; sys.stdout.write(get_python_lib(1))"
+-        OUTPUT_VARIABLE python_package_dir
+-    )
+-
+-    IF("${python_package_dir}" STREQUAL "")
+-        MESSAGE(WARNING "Unable to locate Python site-package directory, unable to install the Python wrapper")
+-    ELSE()
+         FILE(GLOB_RECURSE sourcefiles "${CMAKE_CURRENT_SOURCE_DIR}/../ifcopenshell-python/ifcopenshell/*.py")
+         FOREACH(file ${sourcefiles})
+             FILE(RELATIVE_PATH relative "${CMAKE_CURRENT_SOURCE_DIR}/../ifcopenshell-python/ifcopenshell/" "${file}")
+             GET_FILENAME_COMPONENT(dir "${relative}" DIRECTORY)
+ 			INSTALL(FILES "${file}"
+-                    DESTINATION "${python_package_dir}/ifcopenshell/${dir}")
++                    DESTINATION "@site_packages@/ifcopenshell/${dir}")
+         ENDFOREACH()
+         INSTALL(FILES "${CMAKE_BINARY_DIR}/ifcwrap/ifcopenshell_wrapper.py"
+-                DESTINATION "${python_package_dir}/ifcopenshell")
++                DESTINATION "@site_packages@/ifcopenshell")
+         INSTALL(TARGETS _ifcopenshell_wrapper
+-                DESTINATION "${python_package_dir}/ifcopenshell")
+-    ENDIF()
++                DESTINATION "@site_packages@/ifcopenshell")
+ ELSE()
+     MESSAGE(WARNING "No Python interpreter found, unable to install the Python wrapper")
+ ENDIF()
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index d84b4c36624..754460dd696 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -2879,6 +2879,8 @@ in {
 
   ifconfig-parser = callPackage ../development/python-modules/ifconfig-parser { };
 
+  ifcopenshell = callPackage ../development/python-modules/ifcopenshell { };
+
   ignite = callPackage ../development/python-modules/ignite { };
 
   ihatemoney = callPackage ../development/python-modules/ihatemoney { };