Adds a rake task, and a task to whenevers schedule, to delete all zips in public/data/zip older than 2 days

config/schedule.rb

@@ -22,3 +22,7 @@
 every :day, at: '1am' do
   rake 'dump:full', environment: 'production'
 end
+
+every 7.days, at: '1am' do
+  rake 'dump:clean', environment: 'production'
+end

lib/tasks/dump_clean.rake

@@ -0,0 +1,22 @@
+namespace :dump do
+  desc 'clean everything in public/zip older than 2 days'
+  task clean: :environment do
+    dir = File.join(Rails.root, 'public/data/zip')
+    # Don't ever delete the link and what is linked to
+    datadump = File.join(dir, 'opensnp_datadump.current.zip')
+    forbidden_files = [datadump]
+    forbidden_files << File.readlink(datadump) unless not File.file? datadump
+
+    Dir.entries(dir).each do |f|
+      f = File.join(dir, f)
+      # Has to be older than 2 days, don't delete important files, only delete archives
+      if (get_file_age_in_days(f) > 2) and (not forbidden_files.include? f) and (f.ends_with? 'zip')
+        File.delete(f)
+      end
+    end
+  end
+end
+
+def get_file_age_in_days(file)
+  (Time.now - File.mtime(file)) / (60 * 60 * 24) 
+end