Feature: add auto-approve for terraform (#72)

# Pull Request

## Issue

N/A

## Description

This PR adds the capability to override the Terraform approval step.
This is to support automated testing, but may also benefit customers.

## License

By submitting this pull request, I confirm that my contribution is made
under the terms of the projects associated license.

Author: jaredfholgate

src/ALZ/Private/Invoke-Terraform.ps1

@@ -5,11 +5,19 @@ function Invoke-Terraform {
         [string] $moduleFolderPath,
 
         [Parameter(Mandatory = $false)]
-        [string] $tfvarsFileName
+        [string] $tfvarsFileName,
+
+        [Parameter(Mandatory = $false)]
+        [switch] $autoApprove
     )
 
     if ($PSCmdlet.ShouldProcess("Apply Terraform", "modify")) {
         terraform -chdir="$moduleFolderPath" init
-        terraform -chdir="$moduleFolderPath" apply -var-file="$tfvarsFileName"
+        Write-InformationColored "Terraform init has completed, now running the apply..." -ForegroundColor Green -InformationAction Continue
+        if($autoApprove) {
+            terraform -chdir="$moduleFolderPath" apply -var-file="$tfvarsFileName" -auto-approve
+        } else {
+            terraform -chdir="$moduleFolderPath" apply -var-file="$tfvarsFileName"
+        }
     }
 }

src/ALZ/Private/New-ALZEnvironmentTerraform.ps1

@@ -17,7 +17,10 @@ function New-ALZEnvironmentTerraform {
 
         [Parameter(Mandatory = $false)]
         [Alias("inputs")]
-        [string] $userInputOverridePath = ""
+        [string] $userInputOverridePath = "",
+
+        [Parameter(Mandatory = $false)]
+        [switch] $autoApprove
     )
 
     $terraformModuleUrl = "https://github.com/Azure/alz-terraform-accelerator"
@@ -74,8 +77,12 @@ function New-ALZEnvironmentTerraform {
 
         # Running terraform init and apply
         Write-InformationColored "Thank you for providing those inputs, we are now initializing and applying Terraform to bootstrap your environment..." -ForegroundColor Green -InformationAction Continue
-        Write-InformationColored "Once the plan is complete you will be prompted to confirm the apply. You must enter 'yes' to apply." -ForegroundColor Green -InformationAction Continue
 
-        Invoke-Terraform -moduleFolderPath $bootstrapPath -tfvarsFileName "override.tfvars"
+        if($autoApprove) {
+            Invoke-Terraform -moduleFolderPath $bootstrapPath -tfvarsFileName "override.tfvars" -autoApprove
+        } else {
+            Write-InformationColored "Once the plan is complete you will be prompted to confirm the apply. You must enter 'yes' to apply." -ForegroundColor Green -InformationAction Continue
+            Invoke-Terraform -moduleFolderPath $bootstrapPath -tfvarsFileName "override.tfvars"
+        }
     }
 }

src/ALZ/Public/New-ALZEnvironment.ps1

@@ -14,6 +14,8 @@ function New-ALZEnvironment {
     The IaC provider to use for the ALZ environment.
     .PARAMETER userInputOverridePath
     A json file containing user input overrides for the user input prompts. This will cause the tool to by pass requesting user input for that field and use the value(s) provided. E.g { "starter_module": "basic", "azure_location": "uksouth" }
+    .PARAMETER autoApprove
+    Automatically approve the terraform apply.
     .EXAMPLE
     New-ALZEnvironment
     .EXAMPLE
@@ -47,7 +49,10 @@ function New-ALZEnvironment {
 
         [Parameter(Mandatory = $false)]
         [Alias("inputs")]
-        [string] $userInputOverridePath = ""
+        [string] $userInputOverridePath = "",
+
+        [Parameter(Mandatory = $false)]
+        [switch] $autoApprove
     )
 
     Write-InformationColored "Getting ready to create a new ALZ environment with you..." -ForegroundColor Green -InformationAction Continue
@@ -64,7 +69,11 @@ function New-ALZEnvironment {
                 if($alzVersion -eq "") {
                     $alzVersion = "latest"
                 }
-                New-ALZEnvironmentTerraform -alzEnvironmentDestination $alzEnvironmentDestination -alzVersion $alzVersion -alzCicdPlatform $alzCicdPlatform -userInputOverridePath $userInputOverridePath
+                if($autoApprove) {
+                    New-ALZEnvironmentTerraform -alzEnvironmentDestination $alzEnvironmentDestination -alzVersion $alzVersion -alzCicdPlatform $alzCicdPlatform -userInputOverridePath $userInputOverridePath -autoApprove
+                } else {
+                    New-ALZEnvironmentTerraform -alzEnvironmentDestination $alzEnvironmentDestination -alzVersion $alzVersion -alzCicdPlatform $alzCicdPlatform -userInputOverridePath $userInputOverridePath
+                }
             }
         }
     }