Pin Autorest Version to 3.7.2 (#3547)

* pin autorest version to 3.7.1

* pin to last working version

* throttle limit 2

* csProjeHelper with retry

Author: ramsessanchez

.azure-pipelines/common-templates/install-tools.yml

@@ -34,7 +34,7 @@ steps:
     displayName: Install AutoRest
     inputs:
       command: custom
-      customCommand: install -g autorest@latest
+      customCommand: install -g autorest@3.7.2
 
   - task: Npm@1
     displayName: Install AutorestCore

tools/CSProjHelper.ps1

@@ -1,6 +1,38 @@
 # Copyright (c) Microsoft Corporation. All rights reserved.
 # Licensed under the MIT License.
 
+function Invoke-WithRetry {
+    param(
+        [Parameter(Mandatory = $true)]
+        [scriptblock]$ScriptBlock,
+
+        [Parameter(Mandatory = $false)]
+        [int]$MaxRetries = 5,
+
+        [Parameter(Mandatory = $false)]
+        [int]$InitialDelayMs = 100,
+
+        [Parameter(Mandatory = $false)]
+        [string]$OperationName = "Operation"
+    )
+
+    for ($attempt = 1; $attempt -le $MaxRetries; $attempt++) {
+        try {
+            return & $ScriptBlock
+        }
+        catch {
+            if ($attempt -eq $MaxRetries) {
+                Write-Error "$OperationName failed after $MaxRetries attempts. Last error: $_"
+                throw
+            }
+
+            $delayMs = $InitialDelayMs * [Math]::Pow(2, $attempt - 1)
+            Write-Warning "$OperationName failed (attempt $attempt/$MaxRetries). Retrying in $delayMs ms. Error: $_"
+            Start-Sleep -Milliseconds $delayMs
+        }
+    }
+}
+
 function Set-CSProjValues(
     [parameter(Mandatory = $true)][string] $ModuleCsProj,
     [parameter(Mandatory = $true)][string] $ModuleVersion,

tools/GenerateModules.ps1

@@ -92,8 +92,7 @@ $AutoRestTempFolder | ForEach-Object {
 }
 
 $Stopwatch = [system.diagnostics.stopwatch]::StartNew()
-$CpuCount = (Get-CimInstance Win32_Processor).NumberOfLogicalProcessors
-$Throttle = [math]::Min(4, $cpuCount / 2)  # Use half the CPU count but max 4
+$Throttle = 2  # Reduced from 4 to prevent file locking issues in parallel module generation
 $Results = $ModuleToGenerate | ForEach-Object -Parallel {
     $Module = $_
     Write-Host -ForegroundColor Green "-------------'Generating $Module'-------------"