install .NET SDKs as specified by repo's global.json
files
#11090
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This PR adds new behavior behind the experiment flag
nuget_install_dotnet_sdks
. This experiment is not yet enabled anywhere.The NuGet updater currently has 2 installed .NET SDKs,
8.0.404
and9.0.100
.This PR crawls the directories specified in the job file to install the exact SDKs required by the target repo. It also adds a new helper method to run
dotnet
commands as a subprocess and before starting the process, it removes allMSBuild*
environment variables. This is done because when adotnet
program is running, including the updater tool, it sets some variables indicating where MSBuild came from, but we don't want that in case the user has aglobal.json
file; we instead wantdotnet
to rediscover the correct values. This will prevent, e.g., a 9.x SDK from trying to load 7.x MSBuild binaries.