Use puma instead of unicorn

Puma is the server we use in the development environment, so this way we
don't need to maintain two servers. Furthermore, puma seems to offer a
few advantages over unicorn (like multithreading) and no disadvantages.

Capfile

@@ -12,6 +12,9 @@ require "capistrano/delayed_job"
 require "whenever/capistrano"
 require "rvm1/capistrano3"
 
+require "capistrano/puma"
+install_plugin Capistrano::Puma
+
 #SCM: Git
 require "capistrano/scm/git"
 install_plugin Capistrano::SCM::Git

Gemfile

@@ -41,6 +41,7 @@ gem "paperclip", "~> 5.2.1"
 gem "paranoia", "~> 2.4.2"
 gem "pg", "~> 0.21.0"
 gem "pg_search", "~> 2.0.1"
+gem "puma", "~> 4.2.1"
 gem "recipient_interceptor", "~> 0.2.0"
 gem "redcarpet", "~> 3.4.0"
 gem "responders", "~> 2.4.0"
@@ -55,7 +56,6 @@ gem "translator-text", "~> 0.1.0"
 gem "turbolinks", "~> 2.5.3"
 gem "turnout", "~> 2.4.0"
 gem "uglifier", "~> 4.1.2"
-gem "unicorn", "~> 5.4.1"
 gem "whenever", "~> 0.10.0", require: false
 gem "wicked_pdf", "~> 1.1.0"
 gem "wkhtmltopdf-binary", "~> 0.12.4"
@@ -74,7 +74,6 @@ group :development, :test do
   gem "knapsack_pro", "~> 1.1.0"
   gem "launchy", "~> 2.4.3"
   gem "letter_opener_web", "~> 1.3.4"
-  gem "puma", "~> 4.1.1"
   gem "spring", "~> 2.0.1"
   gem "spring-commands-rspec", "~> 1.0.4"
 end
@@ -94,6 +93,7 @@ group :development do
   gem "capistrano-bundler", "~> 1.2", require: false
   gem "capistrano-rails", "~> 1.4.0", require: false
   gem "capistrano3-delayed-job", "~> 1.7.3"
+  gem "capistrano3-puma", "~> 4.0.0"
   gem "erb_lint", require: false
   gem "mdl", "~> 0.5.0", require: false
   gem "rubocop", "~> 0.75.0", require: false

Gemfile.lock

@@ -116,6 +116,10 @@ GEM
     capistrano3-delayed-job (1.7.5)
       capistrano (~> 3.0, >= 3.0.0)
       daemons (~> 1.2.4)
+    capistrano3-puma (4.0.0)
+      capistrano (~> 3.7)
+      capistrano-bundler
+      puma (~> 4.0)
     capybara (2.17.0)
       addressable
       mini_mime (>= 0.1.3)
@@ -301,7 +305,6 @@ GEM
       activerecord
       kaminari-core (= 1.1.1)
     kaminari-core (1.1.1)
-    kgio (2.11.2)
     knapsack_pro (1.1.0)
       rake
     kramdown (1.17.0)
@@ -388,7 +391,7 @@ GEM
       activesupport (>= 4.2)
       arel (>= 6)
     public_suffix (4.0.1)
-    puma (4.1.1)
+    puma (4.2.1)
       nio4r (~> 2.0)
     rack (2.0.7)
     rack-accept (0.4.5)
@@ -428,7 +431,6 @@ GEM
       rake (>= 0.8.7)
       thor (>= 0.18.1, < 2.0)
     rainbow (3.0.0)
-    raindrops (0.19.0)
     rake (12.3.3)
     recipient_interceptor (0.2.0)
       mail
@@ -554,9 +556,6 @@ GEM
     uglifier (4.1.19)
       execjs (>= 0.3.0, < 3)
     unicode-display_width (1.6.0)
-    unicorn (5.4.1)
-      kgio (~> 2.6)
-      raindrops (~> 0.7)
     uniform_notifier (1.11.0)
     user_agent_parser (2.4.1)
     uuidtools (2.1.5)
@@ -598,6 +597,7 @@ DEPENDENCIES
   capistrano-bundler (~> 1.2)
   capistrano-rails (~> 1.4.0)
   capistrano3-delayed-job (~> 1.7.3)
+  capistrano3-puma (~> 4.0.0)
   capybara (~> 2.17.0)
   capybara-webmock (~> 0.5.3)
   ckeditor (~> 4.2.3)
@@ -641,7 +641,7 @@ DEPENDENCIES
   paranoia (~> 2.4.2)
   pg (~> 0.21.0)
   pg_search (~> 2.0.1)
-  puma (~> 4.1.1)
+  puma (~> 4.2.1)
   rails (= 5.0.7.2)
   rails-assets-leaflet!
   rails-assets-markdown-it (~> 8.2.1)!
@@ -669,7 +669,6 @@ DEPENDENCIES
   turbolinks (~> 2.5.3)
   turnout (~> 2.4.0)
   uglifier (~> 4.1.2)
-  unicorn (~> 5.4.1)
   web-console (~> 3.3.0)
   whenever (~> 0.10.0)
   wicked_pdf (~> 1.1.0)

config/deploy.rb

@@ -21,7 +21,7 @@ set :log_level, :info
 set :pty, true
 set :use_sudo, false
 
-set :linked_files, %w[config/database.yml config/secrets.yml config/unicorn.rb config/environments/production.rb]
+set :linked_files, %w[config/database.yml config/secrets.yml config/environments/production.rb]
 set :linked_dirs, %w[log tmp public/system public/assets public/ckeditor_assets]
 
 set :keep_releases, 5
@@ -35,7 +35,6 @@ set(:config_files, %w[
   log_rotation
   database.yml
   secrets.yml
-  unicorn.rb
 ])
 
 set :whenever_roles, -> { :app }

lib/capistrano/tasks/restart.cap

@@ -1,11 +0,0 @@
-namespace :deploy do
-  desc "Restart Unicorn"
-  task :restart do
-    on roles(:app) do
-      execute "kill -QUIT `cat #{deploy_to}/pids/unicorn.pid`; true"
-      execute "kill -QUIT `cat #{shared_path}/pids/unicorn.pid`; true"
-      execute "kill -QUIT `cat #{shared_path}/tmp/pids/unicorn.pid`; true"
-      execute "cd #{release_path} && bundle exec unicorn -c config/unicorn.rb -E production -D"
-    end
-  end
-end