{CI} Switch docs reference trigger to tag trigger

.azure-pipelines/trigger-reference-docs-ci.yml

@@ -2,10 +2,11 @@ name: Azure CLI Trigger Reference Docs CI
 
 trigger:
   branches:
+    exclude:
+    - '*'
+  tags:
     include:
-    - release
-    - release-lts-*
-    - test-release-*
+    - azure-cli-*
 
 pr: none
 
@@ -19,7 +20,6 @@ variables:
 jobs:
 - job: TriggerReferenceDocsCI
   displayName: 'Queue Microsoft Learn Docs Reference CI'
-  condition: or(eq(variables['Build.SourceBranchName'], 'release'), startsWith(variables['Build.SourceBranchName'], 'release-lts-'), startsWith(variables['Build.SourceBranchName'], 'test-release-'))
   pool:
     name: ${{ variables.ubuntu_pool }}
   steps:
@@ -35,7 +35,30 @@ jobs:
         $project = $env:AdoProject
         $thisRepoLink = $env:ThisRepoLink
         $thisRunLink = $env:ThisRunLink
-        $triggerBranch = $env:ReleaseBranch
+        $tagName = $env:TagName
+
+        # Resolve the release's target_commitish ('release' = latest, 'release-lts-<ver>' = LTS) to pick
+        # the matching docs pipeline. Never guess: retry transient errors, but a 404 (tag with no Release)
+        # or exhausted retries fail the job so a release is never queued against the wrong pipeline.
+        $triggerBranch = $null
+        for ($attempt = 1; $attempt -le 5; $attempt++) {
+            try {
+                $release = Invoke-RestMethod -Uri "https://api.github.com/repos/Azure/azure-cli/releases/tags/$tagName" -Headers @{ 'User-Agent' = 'azure-cli-ado' }
+                $triggerBranch = $release.target_commitish
+                break
+            }
+            catch {
+                if ([int]$_.Exception.Response.StatusCode -eq 404) {
+                    throw "Tag '$tagName' exists but has no GitHub Release; aborting without queuing."
+                }
+                Write-Host "Release lookup attempt $attempt failed, retrying... $_"
+                Start-Sleep -Seconds (5 * $attempt)
+            }
+        }
+        if (-not $triggerBranch) {
+            throw "Could not resolve target_commitish for tag '$tagName' after retries; aborting."
+        }
+
         $definitionId = $triggerBranch -like 'release-lts-*' ? $env:AdoLtsPipelineId : $env:AdoLatestPipelineId
         $variables = @("triggerBranch=$triggerBranch", "triggerFromRepo=$thisRepoLink", "triggerByPipeline=$thisRunLink")
 
@@ -53,6 +76,6 @@ jobs:
       AdoProject: $(ADO_DocsReference_Project)
       AdoLatestPipelineId: $(ADO_DocsReference_Latest_Pipeline_ID)
       AdoLtsPipelineId: $(ADO_DocsReference_LTS_Pipeline_ID)
-      ReleaseBranch: $(Build.SourceBranchName)
+      TagName: $(Build.SourceBranchName)
       ThisRepoLink: $(Build.Repository.Uri)
       ThisRunLink: $(System.CollectionUri)$(System.TeamProject)/_build/results?buildId=$(Build.BuildId)