You'll need the following installed on your computer:

• Erlang.
• Rebar, a package manager for Erlang. Get it with the appropriate system package.

You can then use rebar to install the Erlang dependencies:

$ rebar get-deps
$ rebar compile

In order to point erl at all of the deps we installed via Rebar, we have to run it with:

erl -pa ebin deps/*/ebin

Then, from there, run:

manager:init().

You can then go to the following URL on your local machine provided port 8888 is not already bound to some other process and play with it:

http://localhost:8888

• include/ - record declarations
  • vote.hrl - frontend server config record
• src/ - source files
  • vote.app.src - tells rebar what to compile
  • booth.erl - routes votes between UI and talliers
  • frontend.erl - configures and starts YAWS
    • frontent_config.erl - unpacks vote.hrl
    • frontend_sup.erl - supervises YAWS started in frontend.erl
    • result_events.erl - sends events from winner_collector.erl
    • winner_collector.erl - collects winners from talliers, maintaining list of most recent winners, and allowing others to subscribe for notifications on changes
  • manager.erl - starts everything, informs modules about each other
  • registrar.erl - assigns passwords and voting locations to others, prevents duplicate registations, notifies booths of valid passwords
  • tally.erl - implements talliers
    • count_map.erl - maps, whose values are numbers, which are combined by adding values
    • pairwise.erl - computes the graph of pairwise differences between candidates
    • point_scheme.erl - implements four schemes which assign points to candidates
    • schultze.erl - the best voting scheme
    • vote_count.erl - counts votes
    • all_votes.erl - lists all votes
    • debug.erl - collection of debug utilities
• www/ - YAWS view files
  • index.yaws - list of major pages in the web UI
  • magic.yaws - contains buttons to flush and simulate votes
  • register.yaws - contains registration form
    • register_post.yaws - processes registration form, shows success/fail messages
  • vote.yaws - contains vote form
    • vote_post.yaws - processes vote, shows success/fail messages
  • winners.yaws - displays winners