Context: 4ecedac733/src/Shared/BuildEnvironmentHelper.cs (L567-L586)
Context: 1d71d99837/tools/xabuild
When using `xibuild` to build an SDK-style project:
tools/xibuild/xibuild -- msbuild/tests/MyXamarinFormsApp/MyXamarinFormsAppNS/MyXamarinFormsAppNS.csproj /restore
It was failing with:
Resolving SDK 'Microsoft.NET.Sdk'...
Project "msbuild/tests/MyXamarinFormsApp/MyXamarinFormsApp.csproj" is building "msbuild/tests/MyXamarinFormsApp/MyXamarinFormsAppNS/MyXamarinFormsAppNS.csproj" (GetTargetFrameworks target(s)):
Building with tools version "Current".
msbuild/tests/MyXamarinFormsApp/MyXamarinFormsAppNS/MyXamarinFormsAppNS.csproj : error MSB4236: The SDK 'Microsoft.NET.Sdk' specified could not be found.
Looking at this code, it looks pretty familiar -- it came from xabuild!
xibuild was currently setting `MSBuildSDKsPath` via a config file:
<msbuildToolsets default="Current">
<toolset toolsVersion="Current">
<property name="MSBuildSDKsPath" value="/Library/Frameworks/Mono.framework/Versions/Current/lib/mono/msbuild/Current/bin/Sdks" />
Reviewing the source code for MSBuild, they don't even look for this
value via MSBuild properties... They just look for Visual Studio
directories and a `MSBuildSDKsPath` environment variable. We don't have
to use this in Xamarin.Android, because we do things a different way.
There was craziness involved to get both Windows & Mac working.
For this to work on Mac, we can just set `MSBuildSDKsPath` when
starting the new MSBuild process.
I cleaned up how `MSBUILD_EXE_PATH` is set so both of these variables
are just set via `ProcessStartInfo.EnvironmentVariables`.
Now I can fully build a Xamarin.Forms project that references a
netstandard library with `xibuild`:
$ tools/xibuild/xibuild -- msbuild/tests/MyXamarinFormsApp/MyXamarinFormsApp.csproj /restore
...
Build succeeded.
0 Warning(s)
0 Error(s)
Time Elapsed 00:00:15.83
~~ New Tests ~~
I went ahead and added a new Xamarin.Forms project to test and verify
that it builds. It is the Blank Forms app template from latest VS4Mac.
With the changes to `xibuild`, I was able to build with the in-process
MSBuild APIs.
a51e9f8e88