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Introduction

Try to build a .NetStandard2.0 native (for win-x64, linux-x64 and osx-x64) nuget multi package using dotnet/cli and the new .csproj format.

Build the Binary Packages

To build the .Net nuget packages, simply run:

cmake -S. -Bbuild -DBUILD_DOTNET=ON
cmake --build build --target dotnet_package -v

note: Since dotnet_package is in target all, you can also omit the --target option.

Testing

To list tests:

cd build
ctest -N

To only run .NET tests:

cd build
ctest -R "dotnet_.*"

Technical Notes

First you should take a look at the ortools/dotnet/README.md to understand the layout.
Here I will only focus on the CMake/SWIG tips and tricks.

Build directory layout

Since .Net use a .csproj project file to orchestrate everything we need to generate them and have the following layout:

<CMAKE_BINARY_DIR>/dotnet
── Directory.Build.props
├── orLogo.png
├── ortools
│   ├── algorithms
│   │   ├── *.cs
│   │   ├── knapsack_solverCSHARP_wrap.cxx
│   │   ├── operations_research_algorithms.cs
│   │   └── operations_research_algorithmsPINVOKE.cs
│   ├── constraint_solver
│   │   ├── *.cs
│   │   ├── operations_research_constraint_solver.cs
│   │   ├── operations_research_constraint_solverPINVOKE.cs
│   │   ├── routingCSHARP_wrap.cxx
│   │   └── routingCSHARP_wrap.h
│   ├── graph
│   │   ├── *.cs
│   │   ├── graphCSHARP_wrap.cxx
│   │   ├── operations_research_graph.cs
│   │   └── operations_research_graphPINVOKE.cs
│   ├── linear_solver
│   │   ├── *.cs
│   │   ├── LinearSolver.pb.cs
│   │   ├── operations_research_linear_solver.cs
│   │   └── operations_research_linear_solverPINVOKE.cs
│   ├── sat
│   │   ├── *.cs
│   │   ├── BooleanProblem.pb.cs
│   │   ├── CpModel.pb.cs
│   │   ├── SatParameters.pb.cs
│   │   ├── operations_research_sat.cs
│   │   ├── operations_research_satPINVOKE.cs
│   │   ├── satCSHARP_wrap.cxx
│   │   └── satCSHARP_wrap.h
│   └── util
│       ├── *.cs
│       ├── operations_research_utilPINVOKE.cs
│       ├── sorted_interval_listCSHARP_wrap.cxx
│       └── sorted_interval_listCSHARP_wrap.h
├── Google.OrTools.runtime.linux-x64
│   └── Google.OrTools.runtime.linux-x64.csproj
├── Google.OrTools
│   └── Google.OrTools.csproj
├── replace.cmake
└── replace_runtime.cmake

src: tree build/dotnet --prune -I "obj|bin"