Cron: remove Shrine cache items

After cached items are promoted and file derivatives are produced, we have no need of them anymore. This rake task will run nightly to remove items a week old from our cache.

Fixes geobtaa/geoblacklight_admin#63

config/schedule.rb

@@ -42,6 +42,11 @@
   rake 'geoportal:sidecar_states'
 end
 
+# Clear S3 Cache - removes cached files older than 7 days
+every :day, at: '8:00am', roles: [:app] do 
+  rake 'geoportal:s3:clear_cache'
+end
+
 # URI analysis - No longer required - EWL 10/11/23
 # every '0 1 1 * *', roles: [:prodcron] do
 #   rake 'geoportal:uri_purge'

lib/tasks/geoportal/geoportal_s3.rake

@@ -0,0 +1,8 @@
+namespace :geoportal do
+  namespace :s3 do
+    desc 'Clear S3 Cache'
+    task clear_cache: :environment do
+      Shrine.storages[:cache].clear! { |object| object.last_modified < Time.now - 7*24*60*60 }
+    end
+  end
+end