Private/Save-TemplateBackup.ps1
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function Save-TemplateBackup { <# .SYNOPSIS Saves stack template with current parameters as backup files .PARAMETER StackName Stack name or ARN .PARAMETER CredentialArguments Credential arguments passed to public function. #> param ( [string]$StackName, [hashtable]$CredentialArguments = @{}, [string]$OutputPath ) $stackArguments = Update-EndpointValue -CredentialArguments $CredentialArguments -Service CF try { # Get the stack $stack = Get-CFNStack -StackName $StackName @stackArguments # Check for nested stacks - might support in future if (Get-CFNStackResourceList -StackName $stack.StackId @stackArguments | Where-Object { $_.ResourceType -eq 'AWS::CloudFormation::Stack' }) { Write-Warning "Template backup doesn't currently support nested stacks." } } catch { # Stack not found return } # Get the template $template = Get-CFNTemplate -StackName $stack.StackId @stackArguments $encoding = New-Object System.Text.UTF8Encoding($false, $false) # Determine format $ext = $( try { $template | ConvertFrom-Json | Out-Null "json" } catch { "yaml" } ) if (-not (Test-Path -PathType Container -Path $OutputPath)) { New-Item -Path $OutputPath -ItemType Directory | Out-Null } $OutputPath = (Resolve-Path $OutputPath).Path # Write template $templatePath = Join-Path $OutputPath "$($stack.StackName).template.bak.$($ext)" [IO.File]::WriteAllText($templatePath, $template, $encoding) if ($stack.Parameters.Count -gt 0) { # Write out parameter file $parameterPath = Join-Path $OutputPath "$($stack.StackName).parameters.bak.json" [IO.File]::WriteAllText($parameterPath, ($stack.Parameters | Select-Object PArameterKey, ParameterValue | ConvertTo-Json), $encoding) Write-Host "Template backed up. Revert changes with the following arguments" Write-Host "-StackName $StackName -TemplateLocation '$templatePath' -ParameterFile '$parameterPath'" } else { Write-Host "Template backed up. Revert changes with the following arguments" Write-Host "-StackName $StackName -TemplateLocation '$templatePath'" } } |