Custom Paperclip path. (#778)

* Custom Paperclip path.

* Document PAPERCLIP_ROOT.

* Add PAPERCLIP_ROOT_URL (and rename PAPERCLIP_ROOT to PAPERCLIP_ROOT_PATH).

.env.production.sample

@@ -41,6 +41,10 @@ SMTP_FROM_ADDRESS=notifications@example.com
 #SMTP_ENABLE_STARTTLS_AUTO=true
 
 
+# Optional user upload path and URL (images, avatars). Default is :rails_root/public/system. If you set this variable, you are responsible for making your HTTP server (eg. nginx) serve these files.
+# PAPERCLIP_ROOT_PATH=/var/lib/mastodon/public-system
+# PAPERCLIP_ROOT_URL=/system
+
 # Optional asset host for multi-server setups
 # CDN_HOST=assets.example.com
 

config/initializers/paperclip.rb

@@ -38,4 +38,7 @@ if ENV['S3_ENABLED'] == 'true'
     Paperclip::Attachment.default_options[:url]           = ':s3_alias_url'
     Paperclip::Attachment.default_options[:s3_host_alias] = ENV['S3_CLOUDFRONT_HOST']
   end
+else
+  Paperclip::Attachment.default_options[:path]           = (ENV['PAPERCLIP_ROOT_PATH'] || ':rails_root/public/system') + '/:class/:attachment/:id_partition/:style/:filename'
+  Paperclip::Attachment.default_options[:url]            = (ENV['PAPERCLIP_ROOT_URL'] || '/system') + '/:class/:attachment/:id_partition/:style/:filename'
 end