Only sign and publish once at the join point (#717)

* Only run publish at join point (#714)

(cherry picked from commit 1ed00a9)

* Only sign and publish once

* Set asset manifest file name

Author: mmitche

eng/azure-pipelines.yml

@@ -291,12 +291,7 @@ extends:
                   artifact: Packages_linux_musl_arm64
                   path: 'artifacts/packages'
               - powershell: |
-                  ./eng/common/build.ps1 -ci -configuration $(_BuildConfig) -restore -sign -publish /p:PackageRID=osx-x64 /p:AssetManifestOS=osx /p:PlatformName=x64 $(_InternalBuildArgs)
-                  ./eng/common/build.ps1 -ci -configuration $(_BuildConfig) -restore -sign -publish /p:PackageRID=osx-arm64 /p:AssetManifestOS=osx /p:PlatformName=arm64 $(_InternalBuildArgs)
-                  ./eng/common/build.ps1 -ci -configuration $(_BuildConfig) -restore -sign -publish /p:PackageRID=linux-x64 /p:AssetManifestOS=linux /p:PlatformName=x64 $(_InternalBuildArgs)
-                  ./eng/common/build.ps1 -ci -configuration $(_BuildConfig) -restore -sign -publish /p:PackageRID=linux-arm64 /p:AssetManifestOS=linux /p:PlatformName=arm64 $(_InternalBuildArgs)
-                  ./eng/common/build.ps1 -ci -configuration $(_BuildConfig) -restore -sign -publish /p:PackageRID=linux-musl-x64 /p:AssetManifestOS=linux-musl /p:PlatformName=x64 $(_InternalBuildArgs)
-                  ./eng/common/build.ps1 -ci -configuration $(_BuildConfig) -restore -sign -publish /p:PackageRID=linux-musl-arm64 /p:AssetManifestOS=linux-musl /p:PlatformName=arm64 $(_InternalBuildArgs)
+                  ./eng/common/build.ps1 -ci -configuration $(_BuildConfig) -restore -sign -publish /p:AssetManifestFileName=unix-all.xml $(_InternalBuildArgs)
 
           ############ Workloads BUILD ############
           - job: Build_Workloads

eng/common-variables.yml

@@ -12,7 +12,7 @@ variables:
     value: ''
   - name: _InternalPublishArg
     value: ''
-  - ${{ if or(startswith(variables['Build.SourceBranch'], 'refs/heads/release/'), startswith(variables['Build.SourceBranch'], 'refs/heads/internal/release/')) }}:
+  - ${{ if or(startswith(variables['Build.SourceBranch'], 'refs/heads/release/'), startswith(variables['Build.SourceBranch'], 'refs/heads/internal/release/'), in(variables['Build.Reason'], 'Manual')) }}:
     - name: PostBuildSign
       value: false
   - ${{ else }}: