updateTemplate.ps1

param (
    [string]$templateFile = 'azuredeploy.json',
    [string]$releasesUrl
)

$cloudConfigFile = 'cloud-config.yaml'

if (!(Test-Path $cloudConfigFile)) {
    Write-Host "Cloud config file '$cloudConfigFile' is not accessible"
    exit 1
}

. ./newtonjson.ps1

$json = Invoke-WebRequest $releasesUrl | ConvertFrom-Json

# Select last two major releases
$groups = $json.TC | Group-Object -Property majorVersion | Select-Object -First 2
$versions = New-Object System.Collections.ArrayList

foreach($group in $groups) {
    foreach($release in $group.Group) {
        $versions.add($release.version) > $null
    }
}

Write-Host "Will set the following versions: $versions"

Write-Host "Updating $templateFile file"

$replacementTokens = @{
    "%RDSHost%" = "',reference(resourceId('Microsoft.DBforMySQL/servers',variables('dbServerName'))).fullyQualifiedDomainName,'";
    "%RDSPassword%" = "',replace(parameters('databasePassword'), '\\', '\\\\'),'";
    "%RDSDataBase%" = "',variables('dbName'),'";
    "%DomainName%" = "',reference(variables('publicIpName')).dnsSettings.fqdn,'";
    "%DomainOwnerEmailEnv%" = "',if(empty(parameters('domainOwnerEmail')),'',concat('-e LETSENCRYPT_EMAIL=',parameters('domainOwnerEmail'))),'";
}

$json = (Get-Content -Path $cloudConfigFile -Raw).replace("'", "''")

foreach ($key in $replacementTokens.keys) {
    $json = $json.replace($key, $replacementTokens.Item($key))
}

$customData = "[base64(concat('$json'))]"

$template = [Newtonsoft.Json.JsonConvert]::DeserializeObject((Get-Content $templateFile -Raw), [Newtonsoft.Json.Linq.JObject])

$template.parameters.teamcityVersion.defaultValue = $versions[0]
$allowedValues = $template.parameters.teamcityVersion.allowedValues
if ($allowedValues) {
    $allowedValues.clear()
    foreach($version in $versions) {
        $allowedValues.add($version)
    }
}

$vmResource = $template.resources | Where-Object { $_.name -eq "[variables('vmName')]" }
$vmResource.properties.osProfile.customData = $customData

[Newtonsoft.Json.JsonConvert]::SerializeObject($template, [Newtonsoft.Json.Formatting]::Indented) | Set-Content $templateFile

Write-Host "$templateFile file was updated"