Add a new model to track services

Associated with a mini environment. This can also be used to store
customisations over the chosen revision of govuk-guix.

4 files changed, 135 insertions, 1 deletions

diff --git a/app/models/mini_environment.rb b/app/models/mini_environment.rb
index 712e3a0..77e2f1b 100644
--- a/app/models/mini_environment.rb
+++ b/app/models/mini_environment.rb
@@ -49,6 +49,8 @@ class MiniEnvironment < ApplicationRecord
   belongs_to :govuk_guix_revision, class_name: 'GovukGuix::Revision'
   belongs_to :backend, polymorphic: true
 
+  has_many :services, class_name: 'MiniEnvironmentService', dependent: :destroy
+
   def enqueued_terraform_jobs
     Que.execute("SELECT * FROM que_jobs WHERE args->>0 = '#{id}'")
   end
diff --git a/app/models/mini_environment_service.rb b/app/models/mini_environment_service.rb
new file mode 100644
index 0000000..73aa8aa
--- /dev/null
+++ b/app/models/mini_environment_service.rb
@@ -0,0 +1,57 @@
+# 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/>.
+
+# == Schema Information
+#
+# Table name: mini_environment_services
+#
+#  id                  :integer          not null, primary key
+#  name                :string
+#  revision            :string
+#  mini_environment_id :integer
+#  created_at          :datetime         not null
+#  updated_at          :datetime         not null
+#
+
+class MiniEnvironmentService < ApplicationRecord
+  belongs_to :mini_environment
+
+  def customised?
+    service = mini_environment
+                .govuk_guix_revision
+                .all_available_services
+                .find do |s|
+
+      s['name'] == name
+    end
+
+    Rails.logger.info service
+
+    service['package']['version'] != revision
+  end
+
+  def build_argument_string
+    if customised?
+      "#{name}@#{revision}"
+    else
+      name
+    end
+  end
+end
diff --git a/db/migrate/20180527183740_create_mini_environment_services.rb b/db/migrate/20180527183740_create_mini_environment_services.rb
new file mode 100644
index 0000000..135889c
--- /dev/null
+++ b/db/migrate/20180527183740_create_mini_environment_services.rb
@@ -0,0 +1,11 @@
+class CreateMiniEnvironmentServices < ActiveRecord::Migration[5.1]
+  def change
+    create_table :mini_environment_services do |t|
+      t.string :name
+      t.string :revision
+      t.references :mini_environment, foreign_key: true
+
+      t.timestamps
+    end
+  end
+end
diff --git a/db/structure.sql b/db/structure.sql
index 12c19cf..cd71ee3 100644
--- a/db/structure.sql
+++ b/db/structure.sql
@@ -85,6 +85,39 @@ CREATE TABLE public.govuk_guix_revisions (
 
 
 --
+-- Name: mini_environment_services; Type: TABLE; Schema: public; Owner: -
+--
+
+CREATE TABLE public.mini_environment_services (
+    id bigint NOT NULL,
+    name character varying,
+    revision character varying,
+    mini_environment_id bigint,
+    created_at timestamp without time zone NOT NULL,
+    updated_at timestamp without time zone NOT NULL
+);
+
+
+--
+-- Name: mini_environment_services_id_seq; Type: SEQUENCE; Schema: public; Owner: -
+--
+
+CREATE SEQUENCE public.mini_environment_services_id_seq
+    START WITH 1
+    INCREMENT BY 1
+    NO MINVALUE
+    NO MAXVALUE
+    CACHE 1;
+
+
+--
+-- Name: mini_environment_services_id_seq; Type: SEQUENCE OWNED BY; Schema: public; Owner: -
+--
+
+ALTER SEQUENCE public.mini_environment_services_id_seq OWNED BY public.mini_environment_services.id;
+
+
+--
 -- Name: mini_environments; Type: TABLE; Schema: public; Owner: -
 --
 
@@ -319,6 +352,13 @@ ALTER TABLE ONLY public.finished_terraform_jobs ALTER COLUMN id SET DEFAULT next
 
 
 --
+-- Name: mini_environment_services id; Type: DEFAULT; Schema: public; Owner: -
+--
+
+ALTER TABLE ONLY public.mini_environment_services ALTER COLUMN id SET DEFAULT nextval('public.mini_environment_services_id_seq'::regclass);
+
+
+--
 -- Name: mini_environments id; Type: DEFAULT; Schema: public; Owner: -
 --
 
@@ -385,6 +425,14 @@ ALTER TABLE ONLY public.govuk_guix_revisions
 
 
 --
+-- Name: mini_environment_services mini_environment_services_pkey; Type: CONSTRAINT; Schema: public; Owner: -
+--
+
+ALTER TABLE ONLY public.mini_environment_services
+    ADD CONSTRAINT mini_environment_services_pkey PRIMARY KEY (id);
+
+
+--
 -- Name: mini_environments mini_environments_pkey; Type: CONSTRAINT; Schema: public; Owner: -
 --
 
@@ -448,6 +496,13 @@ CREATE UNIQUE INDEX index_govuk_guix_revisions_on_commit_hash ON public.govuk_gu
 
 
 --
+-- Name: index_mini_environment_services_on_mini_environment_id; Type: INDEX; Schema: public; Owner: -
+--
+
+CREATE INDEX index_mini_environment_services_on_mini_environment_id ON public.mini_environment_services USING btree (mini_environment_id);
+
+
+--
 -- Name: index_mini_environments_on_backend_type_and_backend_id; Type: INDEX; Schema: public; Owner: -
 --
 
@@ -470,6 +525,14 @@ ALTER TABLE ONLY public.mini_environments
 
 
 --
+-- Name: mini_environment_services fk_rails_36052da616; Type: FK CONSTRAINT; Schema: public; Owner: -
+--
+
+ALTER TABLE ONLY public.mini_environment_services
+    ADD CONSTRAINT fk_rails_36052da616 FOREIGN KEY (mini_environment_id) REFERENCES public.mini_environments(id);
+
+
+--
 -- PostgreSQL database dump complete
 --
 
@@ -503,6 +566,7 @@ INSERT INTO "schema_migrations" (version) VALUES
 ('20180410192329'),
 ('20180410192412'),
 ('20180417195307'),
-('20180523062426');
+('20180523062426'),
+('20180527183740');