3 check if deployment branch can be the newest tag

Readme.md

@@ -8,21 +8,20 @@ i.e. a mix of configurations that allow easy deployment with capistrano.
 
 The basic command to deploy `<application>` in the `<environment>` to a `<server>` is
 
-    $ bundle exec cap <server>_<environment>_<application> deploy
+    $ bundle exec cap <server>_<application> deploy
 
 where the three place holders can be:
 * `<server>` is one of
+  * `live` (ontohub.org)
   * `staging` (staging.ontohub.org)
-* `<environment>` is one of
-  * `production`
 * `<application>` is one of
   * `ontohub-frontend`
   * `ontohub-backend`
   * `hets-rabbitmq-wrapper`
 
 so to deploy the backend to staging.ontohub.org, you need to execute
 
-    $ bundle exec cap staging_production_ontohub-backend deploy
+    $ bundle exec cap staging_ontohub-backend deploy
 
 ## First deployment
 

config/deploy/live_hets-rabbitmq-wrapper.rb

@@ -0,0 +1,5 @@
+# frozen_string_literal: true
+
+mixin 'servers/ontohub.org'
+mixin 'environments/production'
+mixin 'applications/hets-rabbitmq-wrapper'

config/deploy/live_ontohub-backend.rb

@@ -0,0 +1,5 @@
+# frozen_string_literal: true
+
+mixin 'servers/ontohub.org'
+mixin 'environments/production'
+mixin 'applications/ontohub-backend'

config/deploy/live_ontohub-frontend.rb

@@ -0,0 +1,5 @@
+# frozen_string_literal: true
+
+mixin 'servers/ontohub.org'
+mixin 'environments/production'
+mixin 'applications/ontohub-frontend'

config/mixins/applications/ontohub-frontend.rb

@@ -66,6 +66,18 @@
   end
 end
 
+# Find the latest tag in the local repository
+# (overwrite the task for the live stage)
+Rake::Task['set_latest_tag'].clear_actions
+after :'git:update', :set_latest_tag do
+  run_locally do
+    Dir.chdir(fetch(:local_repo_path)) do
+      set :latest_tag, `git tag --list`.lines.last.strip
+    end
+  end
+end
+after :set_latest_tag, :set_deploy_tag
+
 after :'git:update', :'git:checkout' do
   run_locally do
     Dir.chdir(fetch(:local_repo_path)) do

config/mixins/servers/ontohub.org.rb

@@ -0,0 +1,47 @@
+# frozen_string_literal: true
+
+set :deploy_user, 'webadm'
+server 'staging.ontohub.org', user: fetch(:deploy_user), roles: %w(app db web)
+set :tmp_dir, '/var/tmp'
+set :rbenv_custom_path, '/local/usr/ruby'
+
+# The branch will be set in the :set_deploy_tag task
+set :branch, nil
+set :backend_url, 'https://tb.iks.cs.ovgu.de'
+set :grecaptcha_site_key, '6LdKSR8UAAAAANuiYuJcuJRQm4Go-dQh0he82vpU'
+
+# Find the latest tag in the repository
+after :'git:update', :set_latest_tag do
+  on roles(:all) do
+    within repo_path do
+      with fetch(:git_environmental_variables) do
+        set :latest_tag, capture(:git, 'tag', '--list').lines.last.strip
+      end
+    end
+  end
+end
+
+# Set the tag to deploy (sets the branch)
+after :set_latest_tag, :set_deploy_tag do
+  # Exit if a branch is given (e.g. by command line)
+  unless fetch(:branch).nil?
+    $stderr.puts 'Cannot deploy: Deploying a branch is disabled for this stage.'
+    exit
+  end
+  # Get the latest tags and set the default
+  default_tag = fetch(:latest_tag)
+
+  # Allow the developer to choose a tag to deploy
+  # rubocop:disable Layout/SpaceInsideStringInterpolation
+  set(:tag,
+      ask("a tag to deploy: [Default: #{ default_tag }] ", default_tag))
+  # rubocop:enable Layout/SpaceInsideStringInterpolation
+
+  # Be extra cautious and exit if a tag cannot be found
+  if fetch(:tag).nil? || fetch(:tag).empty?
+    $stderr.puts 'Cannot deploy: The tag was not found.'
+    exit
+  end
+
+  set(:branch, fetch(:tag))
+end

config/mixins/servers/staging.ontohub.org.rb

@@ -8,3 +8,6 @@
 set :branch, 'master'
 set :backend_url, 'https://tb.iks.cs.ovgu.de'
 set :grecaptcha_site_key, '6LdKSR8UAAAAANuiYuJcuJRQm4Go-dQh0he82vpU'
+
+after :'git:update', :set_latest_tag {}
+after :set_latest_tag, :set_deploy_tag {}