Modify Azure pipeline for Azure Artifacts publishing (microsoft#1336)

Updated Azure pipeline to publish to Azure Artifacts instead of npm.
Added Managed Identity for authentication and created .npmrc files for
Azure Artifacts.

Author: StellaHuang95

build/azure-pipeline.npm.yml

@@ -56,6 +56,14 @@ variables:
       value: next
     ${{ else }}:
       value: latest
+  - name: AzureArtifactsFeedUrl
+    value: 'https://pkgs.dev.azure.com/azure-public/vside/_packaging/python-environments/npm/registry/'
+  # Same URL without the https:// prefix (used in .npmrc auth lines)
+  - name: AzureArtifactsFeedUrlNoProtocol
+    value: 'pkgs.dev.azure.com/azure-public/vside/_packaging/python-environments/npm/registry/'
+  # Managed Identity service connection for Azure Artifacts auth (shared with Pylance)
+  - name: AzureServiceConnection
+    value: 'PylanceSecureVsIdePublishWithManagedIdentity'
 
 extends:
   template: azure-pipelines/MicroBuild.1ES.Official.yml@MicroBuildTemplate
@@ -97,30 +105,66 @@ extends:
                   targetFolder: $(Build.ArtifactStagingDirectory)
 
       - stage: Publish
-        displayName: Publish to npm
+        displayName: Publish to Azure Artifacts
         dependsOn: Build
         condition: and(succeeded(), eq('${{ parameters.publishPackage }}', 'true'))
         jobs:
           - job: PublishPackage
             displayName: Publish $(PackageName)
-            steps:
-              - task: DownloadPipelineArtifact@2
-                displayName: Download build artifact
-                inputs:
+            templateContext:
+              type: releaseJob
+              isProduction: true
+              inputs:
+                - input: pipelineArtifact
                   artifactName: npm-package
-                  targetPath: $(Build.ArtifactStagingDirectory)/npm-package
+                  targetPath: $(Pipeline.Workspace)/npm-package
+            steps:
+              - checkout: none
 
               - task: NodeTool@0
                 inputs:
                   versionSpec: '22.21.1'
                 displayName: Select Node version
 
-              - bash: echo '//registry.npmjs.org/:_authToken=${NODE_AUTH_TOKEN}' > .npmrc
-                workingDirectory: $(Build.SourcesDirectory)/pythonEnvironmentsApi
-                displayName: Configure npm auth
-
-              - bash: npm publish $(Build.ArtifactStagingDirectory)/npm-package/*.tgz --tag $(npmTag) --access public --ignore-scripts
-                displayName: Publish to npm (${{ parameters.quality }})
-                workingDirectory: $(Build.SourcesDirectory)/pythonEnvironmentsApi
+              # Acquire a short-lived AAD token via Managed Identity (no stored secrets)
+              # SEE https://eng.ms/docs/cloud-ai-platform/devdiv/one-engineering-system-1es/1es-docs/1es-security-configuration/configuration-guides/pat-burndown-guidance
+              - task: AzureCLI@2
+                displayName: Acquire AAD token via Managed Identity
+                inputs:
+                  azureSubscription: '$(AzureServiceConnection)'
+                  scriptType: 'pscore'
+                  scriptLocation: 'inlineScript'
+                  inlineScript: |
+                    $token = az account get-access-token --query accessToken --resource 499b84ac-1321-427f-aa17-267ca6975798 -o tsv
+                    Write-Host "##vso[task.setvariable variable=AzdoToken;issecret=true]$token"
+
+              - powershell: |
+                  @"
+                  registry=$(AzureArtifactsFeedUrl)
+                  always-auth=true
+                  "@ | Out-File -FilePath .npmrc
+
+                  @"
+                  ; begin auth token
+                  //$(AzureArtifactsFeedUrlNoProtocol):username=VssSessionToken
+                  //$(AzureArtifactsFeedUrlNoProtocol):_authToken=$env:AZDO_TOKEN
+                  //$(AzureArtifactsFeedUrlNoProtocol):email=not-used@example.com
+                  ; end auth token
+                  "@ | Out-File -FilePath $HOME/.npmrc
                 env:
-                  NODE_AUTH_TOKEN: $(NpmAuthToken)
+                  AZDO_TOKEN: $(AzdoToken)
+                displayName: Create .npmrc files
+
+              - powershell: |
+                  $tgz = Get-ChildItem "$(Pipeline.Workspace)/npm-package/*.tgz" | Select-Object -First 1
+                  if (-not $tgz) {
+                      Write-Error "No .tgz file found in $(Pipeline.Workspace)/npm-package/"
+                      exit 1
+                  }
+                  Write-Host "Publishing: $($tgz.FullName)"
+                  if ("$(npmTag)" -eq "next") {
+                      npm publish $tgz.FullName --registry $(AzureArtifactsFeedUrl) --tag next --ignore-scripts
+                  } else {
+                      npm publish $tgz.FullName --registry $(AzureArtifactsFeedUrl) --ignore-scripts
+                  }
+                displayName: npm publish (${{ parameters.quality }})