Using dotnet SDK from PATH when global_json_has_runtimes

[tmds]

arcade defaults to want to use the dotnet that is on PATH if it matches the global.json SDK version:

arcade/eng/common/tools.sh

Line 54 in 3fe889b

use_installed_dotnet_cli=${use_installed_dotnet_cli:-true}

but that doesn't work when the global.json files has a tools.runtimes section:

arcade/eng/common/tools.sh

Lines 131 to 138 in 3fe889b

	# Find the first path on $PATH that contains the dotnet.exe
	if [[ "$use_installed_dotnet_cli" == true && $global_json_has_runtimes == false && -z "${DOTNET_INSTALL_DIR:-}" ]]; then
	local dotnet_path=`command -v dotnet`
	if [[ -n "$dotnet_path" ]]; then
	ResolvePath "$dotnet_path"
	export DOTNET_INSTALL_DIR=`dirname "$_ResolvePath"`
	fi
	fi

This is the case for aspnetcore: https://github.com/dotnet/aspnetcore/blob/480683e067ec01616eef758f8b0a4f968bf9fbee/global.json#L7C6-L7C14.

Could we extend this condition so that when DotNetBuildFromSource is set to true that the sdk on path does get used?
Does that make sense?

cc @MichaelSimons @premun

[premun]

Apologies, totally missed this.

@MichaelSimons thoughts? Does this tie in together with the planned changes for .NET 9 in any way?

[MichaelSimons]

@MichaelSimons thoughts? Does this tie in together with the planned changes for .NET 9 in any way?

The proposal makes sense for source-build. I see that as orthogonal to the unified build work. If we dropped the unified build work, this still has value.