Enable default GitHub auto-merge support (#5353)

- Add helper scripts to enable GitHub auto-merge
- Enable Github auto-merge for version updates
- Ignore errors from maven search for now because it is down

eng/pipelines/version-updater.yml

@@ -65,7 +65,14 @@ steps:
     PushArgs: -f
     WorkingDirectory: $(AzureSDKClonePath)
     ScriptDirectory: $(AzureSDKToolsScriptsPath)
-    PRLabels: 'auto-merge'
+
+- pwsh: |
+    . ./eng/scripts/Github-Helpers.ps1
+    EnableAutoMergeForPullRequest -pullRequestNumber $(Submitted.PullRequest.Number)
+  displayName: Apply AutoMerge to Pull Request
+  workingDirectory: $(AzureSDKClonePath)
+  env:
+    GH_TOKEN: $(azuresdk-github-pat)
 
 - template: template/steps/generate-releasenotes.yml
 

eng/scripts/Github-Helpers.ps1

@@ -0,0 +1,55 @@
+# These features use a GitHub API that only works under specific conditions. All of the following conditions must be true for this action to succeed.
+
+# The target repository must have Allow auto-merge enabled in settings.
+# The pull request base must have a branch protection rule with at least one requirement enabled.
+# The pull request must be in a state where requirements have not yet been satisfied. If the pull request can already be merged, attempting to enable auto-merge will fail.
+
+function EnableAutoMergeForPullRequest([int]$pullRequestNumber, [string]$name="azure-sdk", [string]$owner="Azure")
+{
+  # query MyQuery($number: Int = "", $owner: String = "", $name: String = "") {
+  #   repository(name: $name, owner: $owner) { pullRequest(number: $number) { id } }
+  # }
+  $projectQuery = 'query($name: String!, $owner: String!, $pullRequestNumber: Int!) { repository(name: $name, owner: $owner) { pullRequest(number: $pullRequestNumber) { id } } }'
+  $selectQuery = ".data.repository.pullRequest.id"
+  $pullRequestId = gh api graphql -f query=$projectQuery -F name=$name -F owner=$owner -F pullRequestNumber=$pullRequestNumber --jq $selectQuery
+  if (!$LASTEXITCODE) {
+    EnableAutoMergeForPullRequestId $pullRequestId
+  }
+  else {
+    Write-Error "$pullRequestId`nLASTEXITCODE = $LASTEXITCODE"
+  }
+}
+
+function EnableAutoMergeForPullRequestId([string]$pullRequestId)
+{
+  $response = gh api graphql -F pullRequestId=$pullRequestId -f query='
+    mutation($pullRequestId: ID!) {
+      enablePullRequestAutoMerge(input: {pullRequestId: $pullRequestId, mergeMethod: SQUASH}) {
+        clientMutationId
+      }
+    }'
+
+  if ($LASTEXITCODE) {
+    $responseJson = $response | ConvertFrom-Json
+    if ($responseJson.errors.message -match "pull request is in (clean|unstable) status") {
+      Write-Verbose "Unable to enable automerge. Make sure you have enabled branch protection with at least one status check marked as required."
+      $LASTEXITCODE = 0
+    }
+  }
+  if ($LASTEXITCODE) {
+    Write-Error "$response`nLASTEXITCODE = $LASTEXITCODE"
+  }
+}
+
+function DisablePullRequestAutoMerge([string]$pullRequestId)
+{
+  $response = gh api graphql -F pullRequestId=$pullRequestId -f query='
+    mutation($pullRequestId: ID!) {
+      disablePullRequestAutoMerge(input: {pullRequestId: $pullRequestId}) {
+        clientMutationId
+      }
+    }'
+  if ($LASTEXITCODE) {
+    Write-Error "$response`nLASTEXITCODE = $LASTEXITCODE"
+  }
+}

eng/scripts/Query-Azure-Packages.ps1

@@ -332,13 +332,19 @@ function Write-Latest-Versions($lang)
 switch($language)
 {
   "all" {
-    Write-Latest-Versions "java"
     Write-Latest-Versions "js"
     Write-Latest-Versions "dotnet"
     Write-Latest-Versions "python"
     Write-Latest-Versions "cpp"
     Write-Latest-Versions "go"
-    Write-Latest-Versions "android"
+    
+    # Currently ignoring errors for maven search site until incident is fixed
+    # see https://github.com/Azure/azure-sdk/issues/5368
+    try {
+      Write-Latest-Versions "java"
+      Write-Latest-Versions "android"
+    }
+    catch { }
     break
   }
   "java" {