[Utilities] Enabled Workflow-Trigger function to trigger only for mod…

…ule diff (ported from AVM) (#4499)

* Add support for triggering workflows based on file diff

* Dummy change to test diff

* Dummy change to test diff

* Adding diff module filter

* Removed dummy changes

utilities/tools/Invoke-PipelinesForBranch.ps1

@@ -28,6 +28,9 @@ Optional. Input parameters to pass into the pipeline. Must match the names of th
 .PARAMETER WorkflowFilePath
 Required. The path to the workflow.
 
+.PARAMETER InvokeForDiff
+Optional. Trigger workflows only for those who's module files have changed (based on diff of branch to main)
+
 .EXAMPLE
 Invoke-GitHubWorkflow -PersonalAccessToken '<Placeholder>' -GitHubRepositoryOwner 'Azure' -GitHubRepositoryName 'ResourceModules' -WorkflowFileName 'ms.analysisservices.servers.yml' -TargetBranch 'main' -GitHubPipelineInputs @{ prerelease = 'false'; staticValidation = 'true'; deploymentValidation = 'true'; removeDeployment = 'true' }
 
@@ -73,10 +76,14 @@ function Invoke-GitHubWorkflow {
         } | ConvertTo-Json
     }
     if ($PSCmdlet.ShouldProcess("GitHub workflow [$workflowFileName] for branch [$TargetBranch]", 'Invoke')) {
-        $response = Invoke-RestMethod @requestInputObject -Verbose:$false
+        try {
+            $response = Invoke-RestMethod @requestInputObject -Verbose:$false
+        } catch {
+            Write-Error "Request failed for [$workflowFileName]. Reponse: [$_]"
+        }
 
         if ($response) {
-            Write-Error "Request failed. Reponse: [$response]"
+            Write-Error "Request failed for [$workflowFileName]. Reponse: [$response]"
             return $false
         }
     }
@@ -215,6 +222,9 @@ function Invoke-PipelinesForBranch {
         [Parameter(Mandatory = $false)]
         [string] $PipelineFilter = 'ms.*',
 
+        [Parameter(Mandatory = $false)]
+        [switch] $InvokeForDiff,
+
         [Parameter(Mandatory = $false)]
         [ValidateSet('GitHub', 'AzureDevOps')]
         [string] $Environment = 'GitHub',
@@ -259,6 +269,36 @@ function Invoke-PipelinesForBranch {
         Write-Verbose 'Fetching current GitHub workflows' -Verbose
         $workflows = Get-GitHubModuleWorkflowList @baseInputObject -Filter $PipelineFilter
 
+        Write-Verbose ('Fetched [{0}] workflows' -f $workflows.Count) -Verbose
+
+        if ($InvokeForDiff) {
+            # Load used function
+            . (Join-Path $RepositoryRoot 'utilities' 'tools' 'helper' 'Get-PipelineFileName.ps1')
+
+            # Get diff
+            $diff = git diff 'main' --name-only
+
+            # Identify pipeline names
+            $pipelineNames = [System.Collections.ArrayList]@()
+            $pipelineNames = $diff | ForEach-Object {
+                $folderPath = Split-Path $_ -Parent
+                $resourceTypeIdentifier = ($folderPath -split 'modules[\/|\\]{1}')[1] -replace '\\', '/'
+                if ($resourceTypeIdentifier.Length -gt 0) {
+                    $pipelineFileName = Get-PipelineFileName -ResourceIdentifier $resourceTypeIdentifier
+                    if ($pipelineFileName -match $PipelineFilter) {
+                        $pipelineFileName
+                    }
+                }
+            } | Select-Object -Unique
+
+            # Filter workflows
+            $workflows = $workflows | Where-Object {
+                $pipelineNames -contains (Split-Path $_.path -Leaf)
+            }
+
+            Write-Verbose ("As per 'diff', filtered workflows down to [{0}]" -f $workflows.Count) -Verbose
+        }
+
         $gitHubWorkflowBadges = [System.Collections.ArrayList]@()
 
         Write-Verbose "Triggering GitHub workflows for branch [$TargetBranch]" -Verbose