Support source-build tarball creation w/internal repos

src/SourceBuild/Arcade/eng/common/templates/job/source-build-create-tarball.yml

@@ -12,7 +12,11 @@ jobs:
       name: NetCore1ESPool-Svc-Internal
       demands: ImageOverride -equals Build.Ubuntu.1604.Amd64
   variables:
-    _BuildConfig: Release
+  - name: _BuildConfig
+    value: Release
+
+  - ${{ if eq(variables['System.TeamProject'], 'internal') }}:
+    - group: DotNet-Source-Build-All-Orgs-Source-Access
   workspace:
     clean: all
 
@@ -50,7 +54,8 @@ jobs:
         $officialBuildArgs \
         $internalRuntimeDownloadArgs \
         /p:DotNetPublishUsingPipelines=true \
-        /p:ArcadeBuildTarball=true
+        /p:ArcadeBuildTarball=true \
+        /p:AzDoPat=$(dn-bot-all-orgs-build-rw-code-rw)
     displayName: Create Tarball
 
   - template: /src/SourceBuild/Arcade/eng/common/templates/steps/source-build-publish-logs.yml

src/SourceBuild/Arcade/tools/SourceBuildArcadeTarball.targets

@@ -123,6 +123,7 @@
       <TarballRepoSourceEngDir>$(TarballSourceDir)$(SourceDir)eng/</TarballRepoSourceEngDir>
       <TarballVersionDetailsFile>$(TarballRepoSourceEngDir)Version.Details.xml</TarballVersionDetailsFile>
       <CloneParam Condition=" '$(CloneVerbosity)' == 'quiet' ">-q</CloneParam>
+      <RepoUri Condition=" '$(AzDoPat)' != '' ">$(RepoUri.Replace('https://dev.azure.com', 'https://dn-bot:$(AzDoPat)@dev.azure.com'))</RepoUri>
     </PropertyGroup>
 
     <!-- Perform a local clone of the root repo, it's faster and doesn't require the RepoSha to be a tree. -->