The end goal here is to enable Windows users to easily run the various
types of tests. Commands have been migrated to MSBuild, keeping `make`
commands the same for macOS and linux.
~~ Usage ~~
Windows:
```
msbuild Xamarin.Android.sln /t:RunAllTests
msbuild Xamarin.Android.sln /t:RunNUnitTests
msbuild Xamarin.Android.sln /t:RunJavaInteropTests
msbuild Xamarin.Android.sln /t:RunApkTests
```
macOS/linux should remain unchanged:
```
make run-all-tests
make run-nunit-tests
make run-ji-tests
make run-apk-tests
```
~~ Changes ~~
- Added a new `build-tools/scripts/RunTests.targets`
- `Before.Xamarin.Android.sln.targets` includes these test targets
- A new `<SetEnvironmentVariable/>` task is needed, added to
`xa-prep-tasks`
- Ported any environment variables set in Makefile to MSBuild
- `Mono.Android-Tests.csproj` needs to remove the `@(ProjectReference)`
within `xa-prep-tasks`:
- Otherwise `xa-prep-tasks.dll` can become locked on Windows
- A nested `xabuild.exe` call will attempt to overwrite it
- Update `.gitignore` for `*.rawproto` and the generated
`Xamarin.Android.Common.props`
Context: https://stackoverflow.com/questions/17709873/how-can-i-invoke-my-msbuild-target-when-msbuild-exe-starts-and-when-it-ends
There is a convention where an MSBuild file named
`Before.<SolutionName>.sln.targets` will get imported prior to a SLN
file getting built. This enables us to import `PrepareWindows.targets`
and enable `msbuild Xamarin.Android.sln /t:Prepare` to work
appropriately.
macOS/Linux remain unchanged, since `PrepareWindows.targets`
currently only works for Windows.
Jonathan Peppers