Use $buildNumber$ token for NuGet (#198)

* Use Nuget token for versions

* Use NuGet v4.6.4+

* Add buildProps during Android PR

.ado/android-pr.yml

@@ -24,6 +24,11 @@ jobs:
       - task: UseNode@1
         inputs:
           version: '10.x'
+
+      # Install NuGet v4.6.4+
+      - task: NuGetToolInstaller@1
+        inputs:
+          versionSpec: '>=4.6.4'
 
       - task: CmdLine@2
         displayName: npm install
@@ -112,6 +117,7 @@ jobs:
           command: pack
           packagesToPack: 'ReactAndroid/ReactAndroid.nuspec'
           packDestination: '$(System.DefaultWorkingDirectory)'
+          buildProperties: buildNumber=$(buildNumber);commitId=$(Build.SourceVersion)
 
       - task: Gradle@1
         displayName: gradlew clean

.ado/publish.yml

@@ -28,6 +28,11 @@ jobs:
         submodules: recursive # set to 'true' for a single level of submodules or 'recursive' to get submodules of submodules
         persistCredentials: true # set to 'true' to leave the OAuth token in the Git config after the initial fetch
 
+      # Install NuGet v4.6.4+
+      - task: NuGetToolInstaller@1
+        inputs:
+          versionSpec: '>=4.6.4'
+
       - task: CmdLine@2
         displayName: npm install
         inputs:
@@ -110,6 +115,7 @@ jobs:
           command: pack
           packagesToPack: 'ReactAndroid/ReactAndroid.nuspec'
           packDestination: '$(Build.StagingDirectory)\final'
+          buildProperties: buildNumber=$(buildNumber);commitId=$(Build.SourceVersion)
 
       - task: CmdLine@2
         displayName: Do Publish

.ado/templates/prep-android-nuget.yml

@@ -1,12 +1,12 @@
 steps:
   - task: PowerShell@2
-    displayName: Extract version from package.json, and put it in nuspec
+    displayName: Extract version from package.json, and put it in `buildNumber` variable
     inputs:
       targetType: inline # filePath | inline
       script: |
         $lines = Get-Content package.json | Where {$_ -match '^\s*"version":.*'} 
         $npmVersion = $lines.Trim().Split()[1].Trim('",');
-        (Get-Content ReactAndroid/ReactAndroid.nuspec).replace('__BuildBuildNumber__', $npmVersion) | Set-Content ReactAndroid/ReactAndroid.nuspec
+        echo "##vso[task.setvariable variable=buildNumber]$npmVersion"
 
   # Pretty yucky - but we dont want devmain to have to update versions _all_ over the place
   - task: PowerShell@2

ReactAndroid/ReactAndroid.nuspec

@@ -2,10 +2,11 @@
 <package xmlns="http://schemas.microsoft.com/packaging/2010/07/nuspec.xsd">
   <metadata>
     <id>OfficeReact.Android</id>
-    <version>__BuildBuildNumber__</version>
+    <version>$buildNumber$</version>
     <description>Contains Android Implementation of React-Native</description>
     <authors>Microsoft</authors>
     <projectUrl>https://github.com/microsoft/react-native</projectUrl>
+    <repository type="git" url="https://github.com/microsoft/react-native.git" commit="$commitId$" />
     <requireLicenseAcceptance>false</requireLicenseAcceptance>
   </metadata>