Export-DbaCredential - Add IF NOT EXISTS guard to exported SQL scripts (#10295)

Author: andreasjordan

public/Export-DbaCredential.ps1

@@ -165,14 +165,15 @@ function Export-DbaCredential {
 
             foreach ($cred in $credentials) {
                 $quotename = $cred.Quotename
+                $credName = $cred.Name.Replace("'", "''")
                 $identity = $cred.Identity.Replace("'", "''")
                 $password = $cred.Password.Replace("'", "''")
                 $cryptoSql = ""
                 if ($cred.MappedClassType -like 'Cryptographic*') {
                     $providerName = $cred.ProviderName
                     $cryptoSql = " FOR CRYPTOGRAPHIC PROVIDER $providerName"
                 }
-                $sql += "CREATE CREDENTIAL $quotename WITH IDENTITY = N'$identity', SECRET = N'$password'" + $cryptoSql
+                $sql += "IF NOT EXISTS (SELECT 1 FROM sys.credentials WHERE name = N'$credName') CREATE CREDENTIAL $quotename WITH IDENTITY = N'$identity', SECRET = N'$password'" + $cryptoSql
             }
 
             if ($Passthru) {

tests/Export-DbaCredential.Tests.ps1

@@ -108,6 +108,10 @@ Describe $CommandName -Tag IntegrationTests {
         It "Should have the password" {
             $exportResults | Should -Match "ReallyT3rrible!"
         }
+
+        It "Should include IF NOT EXISTS guard" {
+            $exportResults | Should -Match "IF NOT EXISTS"
+        }
     }
 
     Context "Should export a specific credential" {