[dotnet] use **FromWorkload** for targeting/runtime pack versions (#12449)

Context: dotnet/sdk#19596
Context: dotnet/android#6184

If we use the version number string of `**FromWorkload**`, then our
runtime packages don't need to be resolved from a NuGet feed. They can
be resolved from the `dotnet/packs` directory.

This completely eliminates the need for a `NuGet.config` file when
building a .NET 6 app with a local build of xamarin-macios.

You will no longer need a feed such as:

    <add key="local-dotnet-feed" value="~/src/xamarin-macios/_build/nuget-feed" />

To further clean things up, I removed the need for:

* Any NuGet feed named `local-dotnet-feed`
* `$(DOTNET_FEED_DIR)`
* Generation of `dotnet/Workloads/NuGet.config`

Author: jonathanpeppers

Make.config

@@ -519,7 +519,6 @@ DOTNET=/usr/local/share/dotnet/dotnet
 DOTNET_DESTDIR ?= $(TOP)/_build
 DOTNET_NUPKG_DIR ?= $(DOTNET_DESTDIR)/nupkgs
 DOTNET_PKG_DIR ?= $(DOTNET_DESTDIR)/pkgs
-DOTNET_FEED_DIR ?= $(DOTNET_DESTDIR)/nuget-feed
 
 # Configuration for .NET 6.
 # We're using preview versions, and there will probably be many of them, so install locally (into builds/downloads) if there's no system version to

dotnet/.gitignore

@@ -1,4 +1,3 @@
-NuGet.config
 global.json
 tmpdir
 Workloads/Microsoft.NET.Sdk.*/LICENSE

dotnet/Makefile

@@ -45,7 +45,6 @@ $(foreach platform,$(DOTNET_WINDOWS_PLATFORMS),$(eval $(call DefineWindowsTarget
 DIRECTORIES += \
 	$(DOTNET_NUPKG_DIR) \
 	$(DOTNET_PKG_DIR) \
-	$(DOTNET_FEED_DIR) \
 	$(foreach platform,$(DOTNET_PLATFORMS),$(DOTNET_DESTDIR)/Microsoft.$(platform).Sdk/data) \
 	$(foreach platform,$(DOTNET_PLATFORMS),$(DOTNET_DESTDIR)/Microsoft.$(platform).Sdk/Sdk) \
 	$(foreach platform,$(DOTNET_PLATFORMS),$(DOTNET_DESTDIR)/Microsoft.$(platform).Sdk/targets) \
@@ -165,21 +164,13 @@ nupkgs/$(1)$(4).$(2).nupkg: $(TEMPLATED_FILES) $(WORKLOAD_TARGETS) $(3) package/
 	@# Delete any versions of the nuget we're building
 	$$(Q) rm -f nupkgs/$(1).*.nupkg
 	$$(Q_PACK) $(DOTNET6) pack package/$(1)/package.csproj -p:VersionBand=$(DOTNET6_VERSION_BAND) --output "$$(dir $$@)" $(DOTNET_PACK_VERBOSITY) "/bl:$$@.binlog"
-	@# Clean the local feed
-	$$(Q_NUGET_DEL) if test -d $(DOTNET_FEED_DIR)/$(shell echo $(1) | tr A-Z a-z)/$(2); then nuget delete $(1) $(2) -source $(abspath $(DOTNET_FEED_DIR)) -NonInteractive $(NUGET_VERBOSITY); fi
-	@# Add the nupkg to our local feed
-	$$(Q_NUGET_ADD) nuget add "$$@" -source $(DOTNET_FEED_DIR) -NonInteractive $(NUGET_VERBOSITY)
 endef
 
 define CreateWindowsNuGetTemplate
 nupkgs/$(1).$(2).nupkg: $(3) $(WORKLOAD_TARGETS) package/$(1)/package.csproj $(wildcard package/*.csproj) $(wildcard $(DOTNET_DESTDIR)/$(1)/* $(DOTNET_DESTDIR)/$(1)/*/* $(DOTNET_DESTDIR)/$(1)/*/*/* $(DOTNET_DESTDIR)/$(1)/*/*/*/*) global.json .stamp-workaround-for-maccore-issue-2427
 	@# Delete any versions of the nuget we're building
 	$$(Q) rm -f nupkgs/$(1).*.nupkg
 	$$(Q_PACK) $(DOTNET6) pack package/$(1)/package.csproj --output "$$(dir $$@)" $(DOTNET_PACK_VERBOSITY) "/bl:$$@.binlog"
-	@# Clean the local feed
-	$$(Q_NUGET_DEL) if test -d $(DOTNET_FEED_DIR)/$(shell echo $(1) | tr A-Z a-z)/$(2); then nuget delete $(1) $(2) -source $(abspath $(DOTNET_FEED_DIR)) -NonInteractive $(NUGET_VERBOSITY); fi
-	@# Add the nupkg to our local feed
-	$$(Q_NUGET_ADD) nuget add "$$@" -source $(DOTNET_FEED_DIR) -NonInteractive $(NUGET_VERBOSITY)
 endef
 
 # Create the NuGet packaging targets. It's amazing what make allows you to do...
@@ -359,10 +350,12 @@ $(foreach platform,$(DOTNET_WINDOWS_PLATFORMS),$(eval $(call CreateMsi,$(platfor
 
 export DOTNETSDK_WORKLOAD_MANIFEST_ROOTS:=$(abspath ./Workloads)
 
-.stamp-install-workloads: Makefile Workloads/NuGet.config $(WORKLOAD_TARGETS) $(RUNTIME_PACKS) $(REF_PACKS) $(SDK_PACKS) $(TEMPLATE_PACKS) $(WORKLOAD_PACKS)
+.stamp-install-workloads: Makefile $(WORKLOAD_TARGETS) $(RUNTIME_PACKS) $(REF_PACKS) $(SDK_PACKS) $(TEMPLATE_PACKS) $(WORKLOAD_PACKS)
 	@# The microsoft.net.sdk.maui workload has a reference to the microsoft-ios-sdk-full workload, which has been renamed, so 'dotnet workload install' fails. Just remove the maui workload, we don't need it here.
 	$(Q) rm -Rf $(DOTNET6_DIR)/sdk-manifests/6.0.100/microsoft.net.sdk.maui
-	$(Q) cd Workloads && $(DOTNET6) workload install --skip-manifest-update \
+	$(Q) $(DOTNET6) workload install --skip-manifest-update \
+		--source https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet6/nuget/v3/index.json \
+		--source $(DOTNET_NUPKG_DIR) --verbosity diag \
 		$(foreach platform,$(DOTNET_PLATFORMS),$(shell echo $(platform) | tr A-Z a-z))
 	$(Q) touch $@
 
@@ -397,11 +390,8 @@ global.json: $(TOP)/global6.json
 $(TOP)/tests/dotnet/NuGet.config:
 	$(Q) $(MAKE) -C $(TOP)/tests/dotnet NuGet.config
 
-Workloads/NuGet.config: $(TOP)/tests/dotnet/NuGet.config
-	$(Q) $(CP) $< $@
-
 clean-local::
-	$(Q) rm -Rf $(DOTNET_NUPKG_DIR) $(DOTNET_FEED_DIR)
+	$(Q) rm -Rf $(DOTNET_NUPKG_DIR)
 	$(Q) git clean -xfdq
 
 .stamp-workaround-for-maccore-issue-2427: global.json $(TOP)/eng/Versions.props $(LOCAL_WORKLOAD_TARGETS)

dotnet/targets/Xamarin.Shared.Sdk.DefaultItems.targets

@@ -85,10 +85,10 @@
     <KnownFrameworkReference Include="Microsoft.$(_PlatformName)"
                             TargetFramework="net6.0"
                             RuntimeFrameworkName="Microsoft.$(_PlatformName)"
-                            DefaultRuntimeFrameworkVersion="$(_ShortPackageVersion)"
-                            LatestRuntimeFrameworkVersion="$(_ShortPackageVersion)"
+                            DefaultRuntimeFrameworkVersion="**FromWorkload**"
+                            LatestRuntimeFrameworkVersion="**FromWorkload**"
                             TargetingPackName="Microsoft.$(_PlatformName).Ref"
-                            TargetingPackVersion="$(_ShortPackageVersion)"
+                            TargetingPackVersion="**FromWorkload**"
                             RuntimePackNamePatterns="Microsoft.$(_PlatformName).Runtime.**RID**"
                             RuntimePackRuntimeIdentifiers="$(_RuntimePackRuntimeIdentifiers)"
                             Profile="$(_PlatformName)"

tests/dotnet/Makefile

@@ -6,7 +6,6 @@ include $(TOP)/Make.config
 # and to put any extracted packages in the 'packages' directory (to not clutter up ~/.nuget/packages)
 NuGet.config: $(TOP)/NuGet.config Makefile
 	$(Q) $(CP) $< $@.tmp
-	$(Q) nuget sources add -Name local-dotnet-feed -Source $(abspath $(DOTNET_FEED_DIR)) -ConfigFile $@.tmp
 ifdef CUSTOM_DOTNET
 	$(Q) nuget sources add -Name dev-runtime-feed -Source $(abspath $(DOTNET_RUNTIME_PATH)/artifacts/packages/Release/Shipping) -ConfigFile [email protected]
 endif