Sync eng/common directory with azure-sdk-tools for PR 16054 (#7187)

* Add pipeline step template to upload test result or llm-facing artifacts

* Make common llm-artifacts template support junit emitting repos

* Only set upload flag when artifacts are found

---------

Co-authored-by: Ben Broderick Phillips <bebroder@microsoft.com>

Author: azure-sdk-automation[bot]

eng/common/pipelines/templates/steps/upload-llm-artifacts.yml

@@ -0,0 +1,96 @@
+# This template stages test result files into an "llm-artifacts" directory so they can be
+# uploaded as a pipeline artifact and consumed by LLM tooling (for example GitHub Copilot)
+# to analyze a test run.
+#
+# It is language agnostic. Every Azure SDK language repo emits test results in a different
+# format (.NET produces TRX, the other languages produce JUnit XML) and with a different
+# file name, so callers pass the appropriate leaf-name glob via TestResultsGlob:
+#
+#   .NET    (TRX):       TestResultsGlob: '$(TestTargetFramework)*.trx'
+#   Python  (JUnit XML): TestResultsGlob: '*test*.xml'
+#   JS      (JUnit XML): TestResultsGlob: 'test-results*.xml', SearchFolder: '$(System.DefaultWorkingDirectory)/sdk'
+#   Java    (JUnit XML): TestResultsGlob: 'TEST-*.xml',        SearchFolder: '$(System.DefaultWorkingDirectory)/sdk'
+#   Go      (JUnit XML): TestResultsGlob: 'report.xml'
+#
+# The staging step does not care about the file format; it only moves files. Each file is
+# renamed using its location relative to the repo's "sdk" directory so results from different
+# services/packages do not collide once flattened into a single directory.
+#
+# Example template usage, see above for per language values:
+#
+#  - template: /eng/common/pipelines/templates/steps/upload-llm-artifacts.yml
+#    parameters:
+#      TestResultsGlob: '*test*.xml'  # e.g. Python
+#      SearchFolder: '$(System.DefaultWorkingDirectory)/sdk'
+#  - output: pipelineArtifact
+#    condition: eq(variables['uploadLlmArtifacts'], 'true')
+
+
+parameters:
+  # One or more comma separated leaf-name globs used to locate test result files.
+  - name: TestResultsGlob
+    type: string
+  # Root directory to search recursively. Scope this (for example to ".../sdk") to avoid
+  # scanning large unrelated trees such as node_modules.
+  - name: SearchFolder
+    type: string
+    default: '$(Build.SourcesDirectory)'
+
+steps:
+  - pwsh: |
+      $artifactsDirectory = "$(Build.ArtifactStagingDirectory)/llm-artifacts"
+      New-Item $artifactsDirectory -ItemType Directory -Force | Out-Null
+
+      $searchFolder = "${{ parameters.SearchFolder }}"
+      $patterns = "${{ parameters.TestResultsGlob }}".Split(",", [StringSplitOptions]::RemoveEmptyEntries) `
+        | ForEach-Object { $_.Trim() } | Where-Object { $_ }
+
+      $testResultsFiles = @(Get-ChildItem -Path $searchFolder -Include $patterns -Recurse -File -ErrorAction SilentlyContinue)
+
+      Write-Host "================="
+      Write-Host "Found $($testResultsFiles.Count) test result file(s) under '$searchFolder' matching: $($patterns -join ', ')"
+      $testResultsFiles | ForEach-Object { Write-Host $_.FullName }
+      Write-Host "================="
+
+      $stagedCount = 0
+      foreach ($testResultsFile in $testResultsFiles)
+      {
+        $fileFullName = $testResultsFile.FullName
+
+        # Build a unique, traceable artifact name from the file's location. Prefer the path
+        # relative to the language repo's "sdk" directory, for example:
+        #   <sources>/sdk/template/Azure.Template/tests/TestResults/net8.0.trx
+        #     -> template-Azure.Template-tests-TestResults-net8.0.trx
+        #   <sources>/sdk/storage/report.xml
+        #     -> storage-report.xml
+        # Fall back to a sources-relative path for repos without an "sdk" directory.
+        if ($fileFullName -match "[\\/]sdk[\\/]")
+        {
+          $relativePath = ($fileFullName -split "[\\/]sdk[\\/]", 2)[-1]
+        }
+        else
+        {
+          $relativePath = [System.IO.Path]::GetRelativePath("$(Build.SourcesDirectory)", $fileFullName)
+        }
+        $fileName = $relativePath -replace "^[\\/]+", "" -replace "[\\/]+", "-"
+
+        $destination = "$artifactsDirectory/$fileName"
+        Move-Item -Path $fileFullName -Destination $destination -ErrorAction Continue
+        if (Test-Path -Path $destination)
+        {
+          $stagedCount++
+        }
+      }
+
+      # Only signal an upload when test result files were actually staged.
+      if ($stagedCount -gt 0)
+      {
+        Write-Host "Staged $stagedCount test result file(s) into '$artifactsDirectory'."
+        Write-Host "##vso[task.setvariable variable=uploadLlmArtifacts]true"
+      }
+      else
+      {
+        Write-Host "No test result files were staged; skipping llm-artifacts upload."
+      }
+    condition: succeededOrFailed()
+    displayName: Copy test result files to llm artifacts staging directory