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splits i/o

splits i/o is a website similar to Pastebin or GitHub Gist, but for splits generated from speedruns rather than text or code. It's written in Ruby on Rails.

splits i/o currently supports splits from Urn, LiveSplit, SplitterZ, Time Split Tracker, and WSplit.

Running locally


  • Ruby 2.2.2
  • PostgreSQL

First run

cp config/application.example.yml config/application.yml
$EDITOR config/application.yml # give it a once-over (required if you want local sign in)
bundle install
rake db:create db:migrate
rails server

Splits I/O runs using some AWS resources, which means to run it locally you'll have to use local versions of these resources (or have AWS account credentials specified in config/application.yml).


Splits I/O uses AWS S3 for long-term run file storage. S3 is the source of truth for run files, allowing us to reparse runs whenever as if the run was just uploaded for the first time. To shim S3 on your local machine, run a fakes3 server in another terminal window.

fakes3 -r /tmp -p 4567


Splits I/O uses AWS DynamoDB for storing parsed runs, so that we don't have to reparse huge 10MB runs to get the splits out of it every time we want to display them. Everything in DynamoDB can theoretically be recreated from what's stored in S3.

To shim DynamoDB on your local machine, run Amazon's official DynamoDB local. If you're on MacOS, you can install this with just

brew install dynamodb-local

then have it auto-run now and at boot with

brew services start dynamodb-local

In your browser

You're good to go! Access localhost:3000 in your browser.

Troubleshooting (OS X)

If you get Bundler errors about eventmachine, try

brew install openssl
brew link openssl --force

If that doesn't work, you may need to also run

gem install eventmachine -- --with-cppflags=-I/usr/local/opt/openssl/include

If you get Bundler errors about nokogiri, run

xcode-select --install


See the full API documentation in the API readme file.


If you're interested in how we parse run files from different programs, check out the parsing readme.


To start running tests, you'll need to set up a test database:

RAILS_ENV=test rake db:create db:migrate