Use different dotnet and artifacts folders when running in docker (on Windows)

This means docker builds won't conflict with each other or with a non-docker build

eng/common/tools.ps1

@@ -50,6 +50,10 @@ function InitializeDotNetCli([bool]$install) {
     $dotnetRoot = $env:DOTNET_INSTALL_DIR
   } else {
     $dotnetRoot = Join-Path $RepoRoot ".dotnet"
+    if ($env:ARCADE_DOTNET_DIR -ne $null)
+    {
+      $dotnetRoot = $env:ARCADE_DOTNET_DIR
+    }
     $env:DOTNET_INSTALL_DIR = $dotnetRoot
 
     if (-not (Test-Path(Join-Path $env:DOTNET_INSTALL_DIR "sdk\$dotnetSdkVersion"))) {
@@ -342,6 +346,11 @@ function MsBuild() {
 $RepoRoot = Resolve-Path (Join-Path $PSScriptRoot "..\..")
 $EngRoot = Resolve-Path (Join-Path $PSScriptRoot "..")
 $ArtifactsDir = Join-Path $RepoRoot "artifacts"
+if ($env:ARCADE_ARTIFACTS_DIR -ne $null)
+{
+  $ArtifactsDir = [System.IO.Path]::GetFullPath($env:ARCADE_ARTIFACTS_DIR) + "\"
+  $env:ArtifactsDir = $ArtifactsDir
+}
 $ToolsetDir = Join-Path $ArtifactsDir "toolset"
 $ToolsDir = Join-Path $RepoRoot ".tools"
 $LogDir = Join-Path (Join-Path $ArtifactsDir "log") $configuration

eng/common/tools.sh

@@ -15,6 +15,11 @@ useInstalledDotNetCli=${useInstalledDotNetCli:-true}
 repo_root="$scriptroot/../.."
 eng_root="$scriptroot/.."
 artifacts_dir="$repo_root/artifacts"
+if [[ -n "${ARCADE_ARTIFACTS_DIR:-}" ]]; then
+  artifacts_dir="$ARCADE_ARTIFACTS_DIR"
+  export ArtifactsDir="$artifacts_dir"
+fi
+
 toolset_dir="$artifacts_dir/toolset"
 log_dir="$artifacts_dir/log/$configuration"
 temp_dir="$artifacts_dir/tmp/$configuration"
@@ -89,6 +94,10 @@ function InitializeDotNetCli {
     dotnet_root="$DOTNET_INSTALL_DIR"
   else
     dotnet_root="$repo_root/.dotnet"
+    if [[ -n "${ARCADE_DOTNET_DIR:-}" ]]; then
+      dotnet_root="$ARCADE_DOTNET_DIR"
+    fi
+
     export DOTNET_INSTALL_DIR="$dotnet_root"
 
     if [[ ! -d "$DOTNET_INSTALL_DIR/sdk/$dotnet_sdk_version" ]]; then

eng/dockerrun.ps1

@@ -55,5 +55,7 @@ docker run $interactiveFlag -t --rm --sig-proxy=true `
   -e PB_PACKAGEVERSIONPROPSURL `
   -e PB_PUBLISHBLOBFEEDURL `
   -e EXTERNALRESTORESOURCES `
+  -e ARCADE_DOTNET_DIR="/opt/code/artifacts/docker/${dockerImageName}/.dotnet" `
+  -e ARCADE_ARTIFACTS_DIR="/opt/code/artifacts/docker/${dockerImageName}/" `
   $dockerContainerTag `
   /opt/code/run-build.sh @additionalArgs

src/redist/targets/GenerateDebs.targets

@@ -236,7 +236,7 @@
         Mode="u+x" />-->
 
       <!-- Build SDK Deb package -->
-      <DotNetDebTool ToolPath="$(RepoRoot).dotnet"
+      <DotNetDebTool ToolPath="$(_DotNetRoot)"
                      InputDirectory="$(LayoutDirectory)"
                      OutputDirectory="$(DotNetDebToolOutputDirectory)"
                      PackageName="$(SdkDebianPackageName)"