Execute Terraform Plan By Building Parameter String

ExcuteTerraformPlan.ps1

param
(
       [Parameter(Mandatory=$true)]
       [string] $tfStateFilePath,
       [Parameter(Mandatory=$true)]
       [string] $planFilePath,
       [Parameter(Mandatory=$true)]
       [string] $AzureSubscriptionId,
       [Parameter(Mandatory=$true)]
       [string] $AzureSPNAppId,
       [Parameter(Mandatory=$true)]
       [string] $AzureSPNPwd,
       [Parameter(Mandatory=$true)]
       [string] $AzureTenantId,
       [Parameter(Mandatory=$true)]
       [string] $projectName,
       [Parameter(Mandatory=$true)]
       [string] $envName,
       [Parameter(Mandatory=$true)]
       [string] $prodEnvName,
       [Parameter(Mandatory=$true)]
       [string] $location,
       [Parameter(Mandatory=$true)]
       [string] $dotnetCoreExtentionName,
       [Parameter(Mandatory=$true)]
       [string] $dotnetCoreExtentionVersion,
       [Parameter(Mandatory=$true)]
       [string] $dotnetFramework,
       [Parameter(Mandatory=$true)]
       [string] $deploySlotName,
       [Parameter(Mandatory=$true)]
       [string] $planKind,
       [Parameter(Mandatory=$true)]
       [string] $planReserved,
       [Parameter(Mandatory=$true)]
       [string] $planSKUTier,
       [Parameter(Mandatory=$true)]
       [string] $planSKUSize,
       [Parameter(Mandatory=$true)]
       [string] $storageTier,
       [Parameter(Mandatory=$true)]
       [string] $storageReplicatonType,
       [Parameter(Mandatory=$true)]
       [string] $functionVersion,
       [Parameter(Mandatory=$true)]
       [string] $keyvaultPurgeProtection,
       [Parameter(Mandatory=$true)]
       [string] $SqlSvrVersion,
       [Parameter(Mandatory=$true)]
       [string] $SqlSvrAdminUser,
       [Parameter(Mandatory=$true)]
       [string] $SqlSvrAdminUserPwd,
       [Parameter(Mandatory=$true)]
       [string] $SQLDatabaseEdition
)

$joinChar='=';

<# Use to try manually from local #>
<#$planFilePath="tempPlan.json"; 
$AzureSubscriptionId='AzureSubscriptionId','azuresubsid' -join $joinChar;
$AzureSPNAppId='AzureSPNAppId','spn app id' -join $joinChar;
$AzureSPNPwd='AzureSPNPwd','spn pwd' -join $joinChar;
$AzureTenantId='AzureTenantId','azure tenant' -join $joinChar;
$projectName='projectName','projname' -join $joinChar;
$envName='envName','dev' -join $joinChar;
$prodEnvName='prodEnvName','prod' -join $joinChar;
$location='location','eastus' -join $joinChar;
$dotnetCoreExtentionName='dotnetCoreExtentionName','AspNetCoreRuntime.3.1.x64' -join $joinChar;
$dotnetCoreExtentionVersion='dotnetCoreExtentionVersion','3.1.8' -join $joinChar;
$dotnetFramework='dotnetFramework','v4.0' -join $joinChar;
$deploySlotName='deploySlotName','deploy' -join $joinChar;
$planKind='planKind','Windows';
$planReserved='planReserved','0' -join $joinChar;
$planSKUTier='planSKUTier','Basic' -join $joinChar;
$planSKUSize='planSKUSize','B1' -join $joinChar;
$storageTier='storageTier','Standard' -join $joinChar;
$storageReplicatonType='storageReplicatonType','LRS' -join $joinChar;
$functionVersion='functionVersion','~3' -join $joinChar;
$keyvaultPurgeProtection='keyvaultPurgeProtection','~3' -join $joinChar;
$SqlSvrVersion='SqlSvrVersion','12.0' -join $joinChar;
$SqlSvrAdminUser='SqlSvrAdminUser','sqladmin' -join $joinChar;
$SqlSvrAdminUserPwd='SqlSvrAdminUserPwd','sqladminpwd' -join $joinChar;
$SQLDatabaseEdition='SQLDatabaseEdition','Basic' -join $joinChar;
#>

# Set terraform variable with value
$AzureSubscriptionId='AzureSubscriptionId',$AzureSubscriptionId -join $joinChar;
$AzureSPNAppId='AzureSPNAppId',$AzureSPNAppId -join $joinChar;
$AzureSPNPwd='AzureSPNPwd',$AzureSPNPwd -join $joinChar;
$AzureTenantId='AzureTenantId',$AzureTenantId -join $joinChar;
$projectName='projectName',$projectName -join $joinChar;
$envName='envName',$envName -join $joinChar;
$prodEnvName='prodEnvName',$prodEnvName -join $joinChar;
$location='location',$location -join $joinChar;
$dotnetCoreExtentionName='dotnetCoreExtentionName',$dotnetCoreExtentionName -join $joinChar;
$dotnetCoreExtentionVersion='dotnetCoreExtentionVersion',$dotnetCoreExtentionVersion -join $joinChar;
$dotnetFramework='dotnetFramework',$dotnetFramework -join $joinChar;
$deploySlotName='deploySlotName',$deploySlotName -join $joinChar;
$planKind='planKind',$planKind -join $joinChar;
$planReserved='planReserved',$planReserved -join $joinChar;
$planSKUTier='planSKUTier',$planSKUTier -join $joinChar;
$planSKUSize='planSKUSize',$planSKUSize -join $joinChar;
$storageTier='storageTier',$storageTier -join $joinChar;
$storageReplicatonType='storageReplicatonType',$storageReplicatonType -join $joinChar;
$functionVersion='functionVersion',$functionVersion -join $joinChar;
$keyvaultPurgeProtection='keyvaultPurgeProtection',$keyvaultPurgeProtection -join $joinChar;
$SqlSvrVersion='SqlSvrVersion',$SqlSvrVersion -join $joinChar;
$SqlSvrAdminUser='SqlSvrAdminUser',$SqlSvrAdminUser -join $joinChar;
$SqlSvrAdminUserPwd='SqlSvrAdminUserPwd',$SqlSvrAdminUserPwd -join $joinChar;
$SQLDatabaseEdition='SQLDatabaseEdition',$SQLDatabaseEdition -join $joinChar;


# Build up terraform varaible format string

$varPrefix= "-var";

$vars =  ($varPrefix,("'",$AzureSubscriptionId,"'" -join '') -join $joinChar
       ),($varPrefix,("'",$AzureSPNAppId,"'" -join '') -join $joinChar
       ),($varPrefix,("'",$AzureSPNPwd,"'" -join '') -join $joinChar
       ),($varPrefix,("'",$AzureTenantId,"'" -join '') -join $joinChar
       ),($varPrefix,("'",$projectName,"'" -join '') -join $joinChar
       ),($varPrefix,("'",$envName,"'" -join '') -join $joinChar
       ),($varPrefix,("'",$prodEnvName,"'" -join '') -join $joinChar
       ),($varPrefix,("'",$location,"'" -join '') -join $joinChar
       ),($varPrefix,("'",$dotnetCoreExtentionName,"'" -join '') -join $joinChar
       ),($varPrefix,("'",$dotnetCoreExtentionVersion,"'" -join '') -join $joinChar
       ),($varPrefix,("'",$dotnetFramework,"'" -join '') -join $joinChar
       ),($varPrefix,("'",$deploySlotName,"'" -join '') -join $joinChar
       ),($varPrefix,("'",$planKind,"'" -join '') -join $joinChar
       ),($varPrefix,("'",$planReserved,"'" -join '') -join $joinChar
       ),($varPrefix,("'",$planSKUTier,"'" -join '') -join $joinChar
       ),($varPrefix,("'",$planSKUSize,"'" -join '') -join $joinChar
       ),($varPrefix,("'",$storageTier,"'" -join '') -join $joinChar
       ),($varPrefix,("'",$storageReplicatonType,"'" -join '') -join $joinChar
       ),($varPrefix,("'",$functionVersion,"'" -join '') -join $joinChar
       ),($varPrefix,("'",$keyvaultPurgeProtection,"'" -join '') -join $joinChar
       ),($varPrefix,("'",$SqlSvrVersion,"'" -join '') -join $joinChar
       ),($varPrefix,("'",$SqlSvrAdminUser,"'" -join '') -join $joinChar
       ),($varPrefix,("'",$SqlSvrAdminUserPwd,"'" -join '') -join $joinChar
       ),($varPrefix,("'",$SQLDatabaseEdition,"'" -join '') -join $joinChar
       ) -join ' '

# Set terraform plan file path and state file path parameters       
$outParam = '-out',("'",$planFilePath,"'" -join '') -join $joinChar
$stateParam = '-state',("'",$tfStateFilePath,"'" -join '') -join $joinChar

# Build up terraform plan command
$planCommand = 'terraform plan',$outParam,$stateParam,$vars -join ' '
write-host ($planCommand)

# Execute terraform plan
Invoke-Expression $planCommand