Workaround peculiar caching behaviors in NuGetSdkResovler when NUGET_PACKAGES is set

.appveyor.yml

@@ -7,7 +7,7 @@ branches:
     - /^release\/.*/
     - /^(.*\/)?ci-.*$/
 build_script:
-  - ps: .\build.ps1
+  - ps: .\build.ps1 -ci
 clone_depth: 1
 test: off
 deploy: off

.gitignore

@@ -25,3 +25,4 @@ global.json
 launchSettings.json
 korebuild-lock.txt
 *.binlog
+.dotnet/

.travis.yml

@@ -18,4 +18,4 @@ branches:
     - /^release\/.*/
     - /^(.*\/)?ci-.*$/
 script:
-  - ./build.sh
+  - ./build.sh --ci

build.ps1

@@ -4,6 +4,8 @@
 <#
 .DESCRIPTION
     Builds this repository
+.PARAMETER CI
+    Treat build as a CI build
 .PARAMETER SkipTests
     Skip tests
 .PARAMETER DotNetHome
@@ -21,6 +23,7 @@
 #>
 [CmdletBinding(PositionalBinding = $false)]
 param(
+    [switch]$CI,
     [switch]$SkipTests,
     [string]$DotNetHome = $null,
     [string]$ToolsSource = 'https://aspnetcore.blob.core.windows.net/buildtools',
@@ -62,7 +65,7 @@ try {
         $MSBuildArguments += "-p:DotNetRestoreSources=$RestoreSources"
     }
 
-    Set-KoreBuildSettings -ToolsSource $ToolsSource -DotNetHome $DotNetHome -RepoPath $PSScriptRoot -ConfigFile $ConfigFile
+    Set-KoreBuildSettings -ToolsSource $ToolsSource -DotNetHome $DotNetHome -RepoPath $PSScriptRoot -ConfigFile $ConfigFile -CI:$CI
     Invoke-KoreBuildCommand "default-build" @MSBuildArguments
 }
 finally {

build.sh

@@ -14,6 +14,7 @@ __usage() {
     echo "    -v|--verbose             Show verbose output."
     echo "    -d|--dotnet-home <DIR>   The directory where .NET Core tools will be stored. Defaults to '$DOTNET_HOME'."
     echo "    -s|--tools-source <URL>  The base url where build tools can be downloaded. Defaults to '$tools_source'."
+    echo "    --ci                     Apply CI specific settings and environment variables."
     exit 2
 }
 
@@ -25,6 +26,7 @@ __usage() {
 config_file="$DIR/korebuild.json"
 tools_source='https://aspnetcore.blob.core.windows.net/buildtools'
 verbose=false
+ci=false
 while [[ $# -gt 0 ]]; do
     case $1 in
         -\?|-h|--help)
@@ -43,6 +45,9 @@ while [[ $# -gt 0 ]]; do
         -v|--verbose)
             verbose=true
             ;;
+        --ci|-[Cc][Ii])
+            ci=true
+            ;;
         --)
             shift
             break
@@ -54,6 +59,6 @@ while [[ $# -gt 0 ]]; do
     shift
 done
 
-set_korebuildsettings "$tools_source" "$DOTNET_HOME" "$DIR" "$config_file"
+set_korebuildsettings "$tools_source" "$DOTNET_HOME" "$DIR" "$config_file" "$ci"
 
 invoke_korebuild_command "default-build" "$@"

modules/BundledPackages/BundledPackages.proj

@@ -23,21 +23,25 @@
       <BundledPackageRestorerContent>
 <![CDATA[
 <Project Sdk="Microsoft.NET.Sdk">
+
+  <Sdk Name="Microsoft.DotNet.GlobalTools.Sdk" Version="$(Version)" />
+
   <PropertyGroup>
     <TargetFramework>netcoreapp2.0</TargetFramework>
     <DisableImplicitFrameworkReferences>true</DisableImplicitFrameworkReferences>
   </PropertyGroup>
+
   <ItemGroup>
     <PackageReference Include="Internal.AspNetCore.Sdk" Version="$(Version)" />
-    <PackageReference Include="Microsoft.DotNet.GlobalTools.Sdk" Version="$(Version)" />
   </ItemGroup>
+
 </Project>
 ]]>
       </BundledPackageRestorerContent>
     </PropertyGroup>
 
     <WriteLinesToFile File="$(PublishDir)BundledPackageRestorer.csproj" Lines="$(BundledPackageRestorerContent)" Overwrite="true" />
-    <Copy SourceFiles="module.props;module.targets" DestinationFolder="$(PublishDir)" />
+    <Copy SourceFiles="module.props;module.targets;NuGet.config" DestinationFolder="$(PublishDir)" />
   </Target>
 
 </Project>

modules/BundledPackages/NuGet.config

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<configuration>
+  <packageSources>
+    <clear />
+    <add key="LocalFolder" value="./" />
+  </packageSources>
+</configuration>

scripts/bootstrapper/run.sh

@@ -186,7 +186,7 @@ while [[ $# -gt 0 ]]; do
         --reinstall|-[Rr]einstall)
             reinstall=true
             ;;
-        --ci)
+        --ci|-[Cc][Ii])
             ci=true
             ;;
         --verbose|-Verbose)