Add import rake task

lib/tasks/db.rake

@@ -12,4 +12,25 @@ namespace :db do
       puts 'Database exists, skipping bootstrap...'
     end
   end
+
+  desc "Import a given file into the database"
+  task :import, [:path] => :environment do |_t, args|
+    dump_path = args.path
+    connection_config = ActiveRecord::Base.connection_config
+
+    case connection_config[:adapter]
+    when "postgresql"
+      system("PGPASSWORD=#{connection_config[:password]} pg_restore " \
+        "--verbose --clean --no-acl --no-owner " \
+        "--username=#{connection_config[:username]} " \
+        "-d #{connection_config[:database]} #{dump_path}")
+    when "mysql", "mysql2"
+      system("mysql -u #{connection_config[:username]} " \
+        "-p#{connection_config[:password]} " \
+        "#{connection_config[:database]} < #{dump_path}")
+    else
+      raise NotImplementedError, "An importer hasn't been implemented for: " \
+        "#{connection_config[:adapter]}"
+    end
+  end
 end