Adding updated Pipeline file for new PR pipeline

Author: Benjin

build/PullRequest.yml

@@ -0,0 +1,12 @@
+trigger:
+  batch: 'true'
+  branches:
+    include:
+      - release/*
+pool:
+  vmImage: "macos-latest"
+
+steps:
+  - template: ./templates/build.yml@self
+    parameters:
+      publishArtifactName: drop # artifact name for publish task

build/templates/build.yml

@@ -0,0 +1,84 @@
+parameters:
+  - name: gulpfile
+    type: string
+    default: "$(Build.SourcesDirectory)/gulpfile.js"
+  - name: publishArtifactName  # artifact name for publish task; enforced by OneBranch
+    type: string
+
+steps:
+  - task: UseNode@1
+    displayName: "Use Node 18.x"
+    inputs:
+      version: 18.x
+
+  - pwsh: |
+      Write-Host "Installing Yarn"
+      npm install --global [email protected]
+      Write-Host "Installing Gulp CLI"
+      npm install --global [email protected]
+      Write-Host "Installing VSCE"
+      npm install --global [email protected]
+    displayName: Install toolchain
+
+  - pwsh: |
+      yarn --frozen-lockfile
+    displayName: "Install extension depedencies"
+    workingDirectory: "$(Build.SourcesDirectory)"
+
+  - task: gulp@1
+    displayName: Build extension
+    inputs:
+      targets: build
+      gulpFile: ${{ parameters.gulpfile }}
+    env:
+      BUILDMACHINE: true
+
+  - task: gulp@1
+    displayName: Lint code
+    inputs:
+      targets: lint
+      gulpFile: ${{ parameters.gulpfile }}
+
+  - task: gulp@1
+    displayName: Run tests and compute coverage
+    inputs:
+      targets: test:cover --log
+      gulpFile: ${{ parameters.gulpfile }}
+
+  - task: PublishTestResults@2
+    displayName: Publish test results
+    inputs:
+      testResultsFormat: 'JUnit'
+      testResultsFiles: '$(Build.SourcesDirectory)/test-reports/test-results-ext.xml'
+    condition: succeededOrFailed()
+
+  - task: gulp@1
+    displayName: Process test coverage
+    inputs:
+      targets: cover
+      gulpFile: ${{ parameters.gulpfile }}
+
+  - task: gulp@1
+    displayName: Package (online)
+    inputs:
+      targets: package:online
+      gulpFile: ${{ parameters.gulpfile }}
+
+  - task: gulp@1
+    displayName: Package (offline)
+    inputs:
+      targets: package:offline
+      gulpFile: ${{ parameters.gulpfile }}
+
+  - task: CopyFiles@2
+    displayName: 'Copy VSIXs to clean folder'
+    inputs:
+      SourceFolder: '$(Build.SourcesDirectory)'
+      Contents: '*.vsix'
+      TargetFolder: '$(Build.ArtifactStagingDirectory)/vsix'
+
+  - task: PublishPipelineArtifact@1
+    displayName: Publish artifacts
+    inputs:
+      targetPath: '$(Build.ArtifactStagingDirectory)/vsix'
+      artifact: ${{ parameters.publishArtifactName }}