Disable sourcelink on RHEL6 and Ubuntu 18

Due to https://github.com/dotnet/sourcelink/issues/204

.vsts-ci.yml

@@ -61,6 +61,7 @@ phases:
           _RuntimeIdentifier: ''
           _BuildArchitecture: 'x64'
           _DropSuffix: ''
+          _AdditionalBuildParameters: '-p:DisableSourceLink=true'
         Build_Fedora_27_Debug_x64:
           _BuildConfig: Debug
           _DockerParameter: '--docker fedora.27'
@@ -103,6 +104,7 @@ phases:
           _RuntimeIdentifier: '--runtime-id rhel.6-x64'
           _BuildArchitecture: 'x64'
           _DropSuffix: ''
+          _AdditionalBuildParameters: '-p:DisableSourceLink=true'
         Build_Arm_Debug:
           _BuildConfig: Debug
           _DockerParameter: ''

Directory.Build.props

@@ -14,4 +14,10 @@
     <IsShipping>true</IsShipping>
     <CoreSdkTargetFramework>netcoreapp3.0</CoreSdkTargetFramework>
   </PropertyGroup>
+
+  <PropertyGroup Condition="'$(DisableSourceLink)' == 'true'">
+    <EnableSourceLink>false</EnableSourceLink>
+    <EnableSourceControlManagerQueries>false</EnableSourceControlManagerQueries>
+    <DeterministicSourcePaths>false</DeterministicSourcePaths>
+  </PropertyGroup>
 </Project>

eng/build.yml

@@ -22,6 +22,7 @@ phases:
       DockerParameter: $(_DockerParameter)
       LinuxPortable: $(_LinuxPortable)
       RuntimeId: $(_RuntimeIdentifier)
+      AdditionalBuildParameters: $(_AdditionalBuildParameters)
 
     steps:
     - ${{ if eq(parameters.agentOs, 'Windows_NT') }}:
@@ -29,6 +30,7 @@ phases:
                   -test -pack -publish
                   -Configuration $(BuildConfig)
                   -Architecture $(BuildArchitecture)
+                  $(AdditionalBuildParameters)
         displayName: Build
         env:
           DOTNET_CLI_UI_LANGUAGE: $(_DOTNET_CLI_UI_LANGUAGE)
@@ -43,6 +45,7 @@ phases:
                   --architecture $(BuildArchitecture)
                   $(LinuxPortable)
                   $(RuntimeId)
+                  $(AdditionalBuildParameters)
         displayName: Build
         env:
           DropSuffix: $(_DropSuffix)