CMake/Tests/RunCMake/GeneratorInstance
Brad King 9ffb35386f VS: Select and save a VS 2017 instance persistently
Visual Studio 2017 supports multiple instances installed on a single
machine.  We use the Visual Studio Installer tool to enumerate instances
and select one.  Once we select an instance for a given build tree, save
the result in `CMAKE_GENERATOR_INSTANCE` so we can re-configure the tree
with the same instance on future re-runs of CMake.

Fixes: #17268
2017-10-19 10:20:12 -04:00
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