Revert "Remove whenever gem and unneeded cron stuff (#1081)" (#1082)

This reverts commit b3e881a.

Dockerfile

@@ -10,7 +10,7 @@ SHELL ["/bin/bash", "-c"]
 RUN groupadd -g $userid -r gi-bill-data-service && \
     useradd -u $userid -r -g gi-bill-data-service -d /srv/gi-bill-data-service gi-bill-data-service
 RUN apt-get update -qq && apt-get install -y \
-    build-essential git curl wget libpq-dev dumb-init shared-mime-info nodejs
+    build-essential git curl wget libpq-dev dumb-init shared-mime-info nodejs cron
 
 RUN mkdir -p /srv/gi-bill-data-service/src && \
     chown -R gi-bill-data-service:gi-bill-data-service /srv/gi-bill-data-service
@@ -47,6 +47,7 @@ COPY --chown=gi-bill-data-service:gi-bill-data-service . .
 USER gi-bill-data-service
 RUN gem install bundler --no-document -v ${BUNDLER_VERSION}
 RUN bundle install --binstubs="${BUNDLE_APP_CONFIG}/bin" $bundler_opts && find ${BUNDLE_APP_CONFIG}/cache -type f -name \*.gem -delete
+RUN bundle exec whenever --update-crontab
 ENV PATH="/usr/local/bundle/bin:${PATH}"
 
 ###

Gemfile

@@ -61,6 +61,7 @@ gem 'rails-html-sanitizer', '>= 1.4.4'
 gem 'ruby-saml'
 gem 'sitemap_generator'
 gem 'strong_migrations'
+gem 'whenever', require: false
 gem 'will_paginate'
 
 group :production do

Gemfile.lock

@@ -121,6 +121,7 @@ GEM
     case_transform (0.2)
       activesupport
     cgi (0.4.1)
+    chronic (0.10.2)
     coderay (1.1.3)
     coercible (1.0.0)
       descendants_tracker (~> 0.0.1)
@@ -446,6 +447,8 @@ GEM
     websocket-driver (0.7.6)
       websocket-extensions (>= 0.1.0)
     websocket-extensions (0.1.5)
+    whenever (1.0.0)
+      chronic (>= 0.6.3)
     will_paginate (4.0.0)
     xpath (3.2.0)
       nokogiri (~> 1.8)
@@ -519,6 +522,7 @@ DEPENDENCIES
   virtus (~> 2.0.0)
   watir (~> 7.3)
   web-console (~> 4.2)
+  whenever
   will_paginate
 
 RUBY VERSION

config/schedule.rb

@@ -0,0 +1,21 @@
+# Use this file to easily define all of your cron jobs.
+#
+# It's helpful, but not entirely necessary to understand cron before proceeding.
+# http://en.wikipedia.org/wiki/Cron
+
+# Example:
+#
+# set :output, "/path/to/my/cron_log.log"
+#
+# every 2.hours do
+#   command "/usr/bin/some_great_command"
+#   runner "MyModel.some_method"
+#   rake "some:great:rake:task"
+# end
+#
+# every 4.days do
+#   runner "AnotherModel.prune_old_records"
+# end
+
+# Learn more: http://github.com/javan/whenever
+#set :job_template, nil