Split out a couple of modules from the TerraformAws class

3 files changed, 167 insertions, 125 deletions

diff --git a/app/models/backends/terraform_aws.rb b/app/models/backends/terraform_aws.rb
index 026f1e4..4db7c51 100644
--- a/app/models/backends/terraform_aws.rb
+++ b/app/models/backends/terraform_aws.rb
@@ -51,116 +51,6 @@ class Backends::TerraformAws < ApplicationRecord
     "#{self.class.name}=#{id}"
   end
 
-  def build(mini_environment)
-    slug = mini_environment.name.parameterize
-
-    GovukGuix::BuildMiniEnvironment.build(
-      mini_environment.id,
-      services: mini_environment.services.map(&:build_argument_string),
-      arguments: {
-        type: 'container-start-script',
-        app_domain: "#{slug}.#{domain}",
-        web_domain: "www.#{slug}.#{domain}",
-        use_https: 'certbot',
-        http_ports_mode: 'alternative',
-        read_bundle_install_input_as_tar_archive: true,
-        signon_instance_name: slug,
-        admin_environment_label: mini_environment.name,
-        use_error_pages: 'true',
-        origin_basic_auth: "#{slug}=#{slug}",
-        share: [
-          '/var/cache/govuk-mini-environment-admin=/var/cache',
-          '/var/lib/govuk-mini-environment-admin=/var/lib',
-          '/var/log/govuk-mini-environment-admin=/var/log'
-        ]
-      },
-      run_remotely_on_host: "ubuntu@guix-daemon.#{domain}"
-    )
-  end
-
-  def create_data_snapshot
-    GovukGuix::CreateDataSnapshotJob.enqueue(
-      run_remotely_on_host: "ubuntu@guix-daemon.#{domain}",
-      backend_type: self.class.name,
-      backend_id: id
-    )
-  end
-
-  def start(mini_environment)
-    logger.info "Setting up #{mini_environment.name}"
-
-    within_terraform_working_directory(mini_environment) do
-      RubyTerraform.apply(
-        vars: terraform_variables(mini_environment),
-        auto_approve: true
-      )
-    end
-  end
-
-  def destroy(mini_environment)
-    within_terraform_working_directory(mini_environment) do
-      RubyTerraform.destroy(
-        vars: terraform_variables(mini_environment),
-        force: true
-      )
-    end
-  end
-
-  def backend_terraform_variables
-    public_ip_address = ENV[
-      'GOVUK_MINI_ENVIRONMENT_ADMIN_PUBLIC_IP_ADDRESS'
-    ]
-
-    raise 'missing public ip address' if public_ip_address.nil?
-
-    common_terraform_variables.merge(
-      aws_vpc_id: vpc_id,
-      ssh_public_key: ssh_public_key,
-      backend_slug: label.parameterize,
-      mini_environment_admin_guix_public_key: guix_public_key,
-      mini_environment_admin_public_ip_address: public_ip_address
-    )
-  end
-
-  def deploy_backend
-    TerraformWorkingDirectory.new(
-      terraform_state_id,
-      'terraform/aws/backend'
-    ).within_working_directory do
-      RubyTerraform.apply(
-        vars: backend_terraform_variables,
-        auto_approve: true
-      )
-    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
-
-  def within_terraform_working_directory(mini_environment, &block)
-    TerraformWorkingDirectory.new(
-      "mini_environment/#{mini_environment.id}",
-      'terraform/aws/mini_environment'
-    ).within_working_directory(&block)
-  end
-
-  def signon_url(mini_environment)
-    "https://signon.#{mini_environment.name.parameterize}.#{domain}"
-  end
-
   def common_terraform_variables
     {
       aws_access_key: aws_access_key_id,
@@ -171,21 +61,6 @@ class Backends::TerraformAws < ApplicationRecord
     }
   end
 
-  def terraform_variables(mini_environment)
-    common_terraform_variables.merge(
-      slug: mini_environment.name.parameterize,
-      start_command: mini_environment.backend_data['build_output'],
-      backend_remote_state_address: (
-        'http://localhost:3000' +
-        Rails
-          .application
-          .routes
-          .url_helpers
-          .terraform_http_backend_path(terraform_state_id)
-      )
-    )
-  end
-
   def terraform_state_id
     "backend/terraform_aws/#{id}"
   end
diff --git a/app/models/backends/terraform_aws/backend_methods.rb b/app/models/backends/terraform_aws/backend_methods.rb
new file mode 100644
index 0000000..726494c
--- /dev/null
+++ b/app/models/backends/terraform_aws/backend_methods.rb
@@ -0,0 +1,73 @@
+# GOV.UK Mini Environment Admin
+# Copyright © 2018  Christopher Baines <mail@cbaines.net>
+#
+# This file is part of the GOV.UK Mini Environment Admin.
+#
+# The GOV.UK Mini Environment Admin is free software: you can
+# redistribute it and/or modify it under the terms of the GNU Affero
+# General Public License as published by the Free Software Foundation,
+# either version 3 of the License, or (at your option) any later
+# version.
+#
+# The GOV.UK Mini Environment Admin is distributed in the hope that it
+# will be useful, but WITHOUT ANY WARRANTY; without even the implied
+# warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public
+# License along with the GOV.UK Mini Environment Admin.  If not, see
+# <http://www.gnu.org/licenses/>.
+
+module Backends::TerraformAws::BackendMethods
+  def create_data_snapshot
+    GovukGuix::CreateDataSnapshotJob.enqueue(
+      run_remotely_on_host: "ubuntu@guix-daemon.#{domain}",
+      backend_type: self.class.name,
+      backend_id: id
+    )
+  end
+
+  def backend_terraform_variables
+    public_ip_address = ENV[
+      'GOVUK_MINI_ENVIRONMENT_ADMIN_PUBLIC_IP_ADDRESS'
+    ]
+
+    raise 'missing public ip address' if public_ip_address.nil?
+
+    common_terraform_variables.merge(
+      aws_vpc_id: vpc_id,
+      ssh_public_key: ssh_public_key,
+      backend_slug: label.parameterize,
+      mini_environment_admin_guix_public_key: guix_public_key,
+      mini_environment_admin_public_ip_address: public_ip_address
+    )
+  end
+
+  def deploy_backend
+    TerraformWorkingDirectory.new(
+      terraform_state_id,
+      'terraform/aws/backend'
+    ).within_working_directory do
+      RubyTerraform.apply(
+        vars: backend_terraform_variables,
+        auto_approve: true
+      )
+    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
+end
diff --git a/app/models/backends/terraform_aws/mini_environment_methods.rb b/app/models/backends/terraform_aws/mini_environment_methods.rb
new file mode 100644
index 0000000..31d7b19
--- /dev/null
+++ b/app/models/backends/terraform_aws/mini_environment_methods.rb
@@ -0,0 +1,94 @@
+# GOV.UK Mini Environment Admin
+# Copyright © 2018  Christopher Baines <mail@cbaines.net>
+#
+# This file is part of the GOV.UK Mini Environment Admin.
+#
+# The GOV.UK Mini Environment Admin is free software: you can
+# redistribute it and/or modify it under the terms of the GNU Affero
+# General Public License as published by the Free Software Foundation,
+# either version 3 of the License, or (at your option) any later
+# version.
+#
+# The GOV.UK Mini Environment Admin is distributed in the hope that it
+# will be useful, but WITHOUT ANY WARRANTY; without even the implied
+# warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public
+# License along with the GOV.UK Mini Environment Admin.  If not, see
+# <http://www.gnu.org/licenses/>.
+
+module Backends::TerraformAws::MiniEnvironmentMethods
+  def build(mini_environment)
+    slug = mini_environment.name.parameterize
+
+    GovukGuix::BuildMiniEnvironment.build(
+      mini_environment.id,
+      services: mini_environment.services.map(&:build_argument_string),
+      arguments: {
+        type: 'container-start-script',
+        app_domain: "#{slug}.#{domain}",
+        web_domain: "www.#{slug}.#{domain}",
+        use_https: 'certbot',
+        http_ports_mode: 'alternative',
+        read_bundle_install_input_as_tar_archive: true,
+        signon_instance_name: slug,
+        admin_environment_label: mini_environment.name,
+        use_error_pages: 'true',
+        origin_basic_auth: "#{slug}=#{slug}",
+        share: [
+          '/var/cache/govuk-mini-environment-admin=/var/cache',
+          '/var/lib/govuk-mini-environment-admin=/var/lib',
+          '/var/log/govuk-mini-environment-admin=/var/log'
+        ]
+      },
+      run_remotely_on_host: "ubuntu@guix-daemon.#{domain}"
+    )
+  end
+
+  def start(mini_environment)
+    logger.info "Setting up #{mini_environment.name}"
+
+    within_terraform_working_directory(mini_environment) do
+      RubyTerraform.apply(
+        vars: terraform_variables(mini_environment),
+        auto_approve: true
+      )
+    end
+  end
+
+  def destroy(mini_environment)
+    within_terraform_working_directory(mini_environment) do
+      RubyTerraform.destroy(
+        vars: terraform_variables(mini_environment),
+        force: true
+      )
+    end
+  end
+
+  def within_terraform_working_directory(mini_environment, &block)
+    TerraformWorkingDirectory.new(
+      "mini_environment/#{mini_environment.id}",
+      'terraform/aws/mini_environment'
+    ).within_working_directory(&block)
+  end
+
+  def signon_url(mini_environment)
+    "https://signon.#{mini_environment.name.parameterize}.#{domain}"
+  end
+
+  def terraform_variables(mini_environment)
+    common_terraform_variables.merge(
+      slug: mini_environment.name.parameterize,
+      start_command: mini_environment.backend_data['build_output'],
+      backend_remote_state_address: (
+        'http://localhost:3000' +
+        Rails
+          .application
+          .routes
+          .url_helpers
+          .terraform_http_backend_path(terraform_state_id)
+      )
+    )
+  end
+end