Why is my OpenStudio with Python bindings build not working?

edit

So in answer to my own question, the issue was trying to build using Visual Studio 2015. After a few missteps I've managed to get a working build using Visual Studio 2013. Thanks definitely due to @MarkAdams!

There are five main steps to the process - setting up the tools required, cloning the source code, configuring and generating the solution file in CMake, building in Visual Studio 2013, and finally setting up your Python environment

1) Set up the build environment for Windows

Install the software listed:

• Visual Studio 2013 with Update 5 (must be VisualStudio 2013 - trying to build with VisualStudio 2015 Community Edition failed)

• CMake v3.3.0

• Qt v5.3.2

• msysGit for working with Git

• EnergyPlus 8.3.0

• NSIS (builds the installer that packages everything up including the Python library)

Add C:\Qt\Qt5.3.2\5.3\msvc2013_64_opengl\bin to the System Path

2) Clone OpenStudio from Github

Launch Git Bash and run the following commands in the folder you want to build in. I ran directly in C: so my source folder will be C:\OpenStudio throughout this step-by-step.

git clone -b develop git@github.com:NREL/OpenStudio.git
cd OpenStudio
mkdir build

3) Configure and generate in CMake

• Launch CMake

• Set the path to the source code: C:\OpenStudio and the build path: C:\OpenStudio\build

• Hit Configure and selected Visual Studio 12 2013 Win64 from the dropdown

• Leave the radio button on the default, Use default native compilers

• CMake runs for a little while then will hit an error which prompts to set SWIG_EXECUTABLE

• Set the full path to the swig.exe executable C:/swigwin-3.0.7/swig.exe

• Tick BUILD_PACKAGE and BUILD_PYTHON_BINDINGS

• Keep hitting Configure until the red highlighting on the new entries is all gone

• Hit Generate

4) Build in Visual Studio 2013

• Open up Visual Studio 2013 and open the OpenStudio.sln file from the build directory

• Build > Configuration Manager set the build configuration to Release. This is needed because we don't have python_d.lib on the system which is required for a Debug build

• Set to build PACKAGE since that setting wasn't set and this answer suggested we need it

• Run Build > Build solution which churns away for a few hours and eventually spits out the final product

• Run the installer from C:\OpenStudio\build\_CPack_Packages\win64\NSIS

5) Make it visible to Python (edited)

• Add an __init__.py file to C:\Program Files\OpenStudio 1.8.5\Python\openstudio to make it into a Python package

• Add the following to the __init__.py file for all the imports. My one's here. I think it could be better structured (@MarkAdams, any suggestions? I notice you do from openstudioutilitiescore import * here

  import openstudioairflow as airflow
  import openstudioanalysis as analysis
  ...
  

• Add C:\Program Files\OpenStudio 1.8.5\Python (or wherever you installed to) to you Python path

• Test it out. Open up a Python shell and try

from openstudio import model
print model.Model()

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