[devops] Move Linux build verification from GitHub Actions to Azure DevOps (#24926)

Replace the GitHub Actions workflow (.github/workflows/linux-build.yml)
with a new Azure DevOps stage that runs in parallel with the existing
pipeline stages. The new stage checks out the code on a Linux agent,
verifies system dependencies, and runs 'make' to confirm the build
succeeds.

The stage is added to both the official build pipeline (main-stage.yml)
and the test pipeline (tests-stage.yml), using the appropriate Linux
pool for each (1ES pool for official, ubuntu-latest for tests).

This solves a problem with the GitHub action where it wouldn't run if the last
commit was from another GitHub action (which is a good thing). This is
problematic for us though, because this happens fairly often (autoformat, global.json
generation), and it means such pull requests require admin rigths to merge,
because the linux validation is a required check.

---------

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: rolfbjarne

.github/workflows/linux-build.yml

@@ -265,6 +265,7 @@ class ParallelTestsResults {
     [string] $Context
     [string] $VSDropsIndex
     [TestResult[]] $Results
+    [string] $LinuxBuildStatus
 
     ParallelTestsResults (
         [TestResult[]] $results,
@@ -306,6 +307,9 @@ class ParallelTestsResults {
         if (-not [string]::IsNullOrEmpty($this.BuildFailureMessage)) {
             return $false
         }
+        if (-not [string]::IsNullOrEmpty($this.LinuxBuildStatus) -and $this.LinuxBuildStatus -ne "Succeeded") {
+            return $false
+        }
         $failingTests = $this.GetFailingTests()
         return $failingTests.Count -eq 0
     }
@@ -490,6 +494,19 @@ class ParallelTestsResults {
             }
         }
 
+        # Add Linux build verification status
+        if (-not [string]::IsNullOrEmpty($this.LinuxBuildStatus)) {
+            $pipelineLink = "$Env:SYSTEM_TEAMFOUNDATIONCOLLECTIONURI$Env:SYSTEM_TEAMPROJECT/_build/results?buildId=$Env:BUILD_BUILDID"
+            $stringBuilder.AppendLine("")
+            $stringBuilder.AppendLine("## Linux Build Verification")
+            $stringBuilder.AppendLine("")
+            if ($this.LinuxBuildStatus -eq "Succeeded") {
+                $stringBuilder.AppendLine(":white_check_mark: [Linux build succeeded]($pipelineLink)")
+            } else {
+                $stringBuilder.AppendLine(":x: [Linux build $($this.LinuxBuildStatus.ToLower())]($pipelineLink)")
+            }
+        }
+
         $stringBuilder.AppendLine()
         $stringBuilder.AppendLine("[comment]: <> (This is a test result report added by Azure DevOps)")
     }
@@ -664,7 +681,21 @@ class ParallelTestsResults {
             }
         }
 
-        return [ParallelTestsResults]::new($testResults, $Context, $VSDropsIndex)
+        $result = [ParallelTestsResults]::new($testResults, $Context, $VSDropsIndex)
+
+        # Extract the Linux build verification status from stage dependencies
+        if ($stageDep.ContainsKey("linux_build_verification")) {
+            $linuxStage = $stageDep["linux_build_verification"]
+            if ($linuxStage.ContainsKey("linux_build")) {
+                $linuxJob = $linuxStage["linux_build"]
+                if ($linuxJob.ContainsKey("result")) {
+                    $result.LinuxBuildStatus = $linuxJob["result"]
+                    Write-Host "Linux build verification status: $($result.LinuxBuildStatus)"
+                }
+            }
+        }
+
+        return $result
     }
 }
 

tools/devops/automation/scripts/TestResults.psm1

@@ -0,0 +1,52 @@
+# Stage to verify the project builds successfully on Linux.
+
+parameters:
+
+- name: isPR
+  type: boolean
+
+- name: repositoryAlias
+  type: string
+  default: self
+
+- name: commit
+  type: string
+  default: HEAD
+
+- name: pool
+  type: object
+  default:
+    vmImage: ubuntu-latest
+
+- name: stageDisplayNamePrefix
+  type: string
+  default: ''
+
+stages:
+
+- stage: linux_build_verification
+  displayName: '${{ parameters.stageDisplayNamePrefix }}Linux Build Verification'
+  dependsOn: []
+  jobs:
+  - job: linux_build
+    displayName: 'Build on Linux'
+    pool: ${{ parameters.pool }}
+    timeoutInMinutes: 60
+    steps:
+    - template: ../common/checkout.yml
+      parameters:
+        isPR: ${{ parameters.isPR }}
+        repositoryAlias: ${{ parameters.repositoryAlias }}
+        commit: ${{ parameters.commit }}
+
+    - bash: |
+        set -ex
+        ./system-dependencies.sh
+      displayName: 'Check system dependencies'
+      workingDirectory: $(System.DefaultWorkingDirectory)/$(BUILD_REPOSITORY_TITLE)
+
+    - bash: |
+        set -ex
+        make -j$(nproc)
+      displayName: 'Build on Linux'
+      workingDirectory: $(System.DefaultWorkingDirectory)/$(BUILD_REPOSITORY_TITLE)

tools/devops/automation/templates/build/linux-build-verification.yml

@@ -123,6 +123,13 @@ parameters:
 
 stages:
 
+- template: ./build/linux-build-verification.yml
+  parameters:
+    isPR: ${{ parameters.isPR }}
+    repositoryAlias: ${{ parameters.repositoryAlias }}
+    commit: ${{ parameters.commit }}
+    stageDisplayNamePrefix: ${{ parameters.stageDisplayNamePrefix }}
+
 - stage: configure_build
   displayName: '${{ parameters.stageDisplayNamePrefix }}Configure'
   dependsOn: ${{ parameters.dependsOn }}

tools/devops/automation/templates/tests-stage.yml

@@ -47,6 +47,7 @@ stages:
   - configure_build
   - simulator_tests
   - windows_integration
+  - linux_build_verification
   condition: and(succeededOrFailed(), ${{ parameters.condition }})
 
   jobs: