Add support for destroying Terraform AWS backends

2 files changed, 19 insertions, 0 deletions

diff --git a/app/models/backends/terraform_aws.rb b/app/models/backends/terraform_aws.rb
index 204eaf0..299b5b5 100644
--- a/app/models/backends/terraform_aws.rb
+++ b/app/models/backends/terraform_aws.rb
@@ -127,6 +127,18 @@ class Backends::TerraformAws < ApplicationRecord
     end
   end
 
+  def destroy_backend
+    TerraformWorkingDirectory.new(
+      terraform_state_id,
+      'terraform/aws/backend'
+    ).within_working_directory do
+      RubyTerraform.destroy(
+        vars: backend_terraform_variables,
+        force: true
+      )
+    end
+  end
+
   def available_data_snapshots
     GovukGuix::DataSnapshot.where(backend: self)
   end
diff --git a/lib/tasks/backend.rake b/lib/tasks/backend.rake
index b2db905..c23a3df 100644
--- a/lib/tasks/backend.rake
+++ b/lib/tasks/backend.rake
@@ -15,5 +15,12 @@ namespace :backend do
         .find(args.backend_id)
         .deploy_backend
     end
+
+    desc 'Destroy a Terraform AWS backend'
+    task :destroy, [:backend_id] => :environment do |t, args|
+      Backends::TerraformAws
+        .find(args.backend_id)
+        .destroy_backend
+    end
   end
 end