Download the AWS cloud formation samples in both JSON and AWS format

Get-AWSCloudFormationSamples.ps1

param(
    [Parameter(Mandatory=$false)]
    [ValidateSet("ap-northeast-1","ap-northeast-2","ap-south-1","ap-southeast-1","ap-southeast-2","ca-central-1","eu-central-1","eu-west-1","eu-west-2","sa-east-1","us-east-1","us-east-2","us-west-1","us-west-2")]
    [string]$Region="eu-west-1",
    [Parameter(Mandatory=$false)]
    [string]$OutputPath="$env:USERPROFILE\Documents\AWSCloudFormation-samples-json-yaml"
)
Set-StrictMode -Version latest

$rubyPath=& "C:\Windows\System32\where.exe" ruby 2>&1
if(-not $?)
{
    Write-Warning "ruby.exe is not available. Stopping"
    return
}

# US East (Northern Virginia) Region url is
# https://s3.amazonaws.com/cloudformation-examples-us-east-1/AWSCloudFormation-samples.zip
if($region -eq "us-east-1")
{
    $sampleUrl="https://s3.amazonaws.com/cloudformation-examples-$region/AWSCloudFormation-samples.zip"
}
else
{
    $sampleUrl="https://s3-$region.amazonaws.com/cloudformation-examples-$region/AWSCloudFormation-samples.zip"
}

$tempSamplePath=Join-Path $env:TEMP "AWSCloudFormation-samples.zip"
if(Test-Path -Path $tempSamplePath)
{
    Remove-Item -Path $tempSamplePath -Force
}
Invoke-WebRequest -Uri $sampleUrl -UseBasicParsing -OutFile $tempSamplePath

$expandPath=Join-Path $env:TEMP "AWSCloudFormation-samples"
if(Test-Path -Path $expandPath)
{
    Remove-Item -Path $expandPath -Recurse -Force
}

Expand-Archive -Path $tempSamplePath -DestinationPath $expandPath

Get-ChildItem -Path $expandPath |ForEach-Object {
    $jsonPath="$($_.FullName).json"
    $yamlPath="$($_.FullName).yaml"
    $_|Rename-Item -NewName $jsonPath

    $rubyArgs=@(
        "-ryaml"
        "-rjson"
        "-e"
        "puts YAML.dump(JSON.parse(File.read('$jsonPath')))"
    )
    Write-Host "Converting $jsonPath to $yamlPath"
    & $rubyPath $rubyArgs 2>&1 |Out-File -Encoding ascii -FilePath $yamlPath -Force
}
if(-not (Test-Path $OutputPath -PathType Container))
{
    $null=New-Item $OutputPath -ItemType Directory
}
Move-Item -Path "$expandPath\*.*" -Destination $OutputPath -Force

Requires ruby to be installed. Quick way to install with Chocolatey choco install ruby -y.

Usage examples

# Download samples from EU West (Ireland) into AWSCloudFormation-samples-json-yaml in your documents folder. e.g. c:\users\username\documents\AWSCloudFormation-samples-json-yaml
& Get-AWSCloudFormationSamples.ps1

# Download samples from Asia Pacific (Tokyo) into C:\AWSCloudFormation-samples-json-yaml
& Get-AWSCloudFormationSamples.ps1 -Region ap-northeast-1 -OutputPath "C:\AWSCloudFormation-samples-json-yaml"