gen_server2 is a modified version of OTP's gen_server behaviour. This repository is hosted so people don't have to keep copying the gen_server2 source file into their projects, which is pointless unless you're planning on making modifications of your own.
Using epm, you can install in the following manner:
t4@malachi:~ $ epm install hyperthunk/gen_server2 epm v0.1.1, 2010 =============================== Install the following packages? =============================== + hyperthunk-gen_server2-master ([y]/n) y + downloading http://github.com/hyperthunk/gen_server2/tarball/master + compiling with rebar... + running gen_server2 build command + running gen_server2 install command t4@malachi:~ $ erl Erlang R13B04 (erts-5.7.5) [source] [smp:2:2] [rq:2] [async-threads:0] [hipe] [kernel-poll:false] Eshell V5.7.5 (abort with ^G) 1> code:which(gen_server2). "/Users/t4/Library/Erlang/Site/gen_server2-1.0.0/ebin/gen_server2.beam" 2> If you're using rebar as your build tool, then you can include this in your dependencies to have it pulled down automatically:
%% file: rebar.config {deps, [ {gen_server2, "1.0.0", {git, "http://github.com/hyperthunk/gen_server2.git", "master"}} ]}. And pull it with get/check-deps:
t4@malachi:plumber $ rebar get-deps ==> plumber (get-deps) Pulling gen_server2 from {git,"http://github.com/hyperthunk/gen_server2.git", "master"} Initialized empty Git repository in /Users/t4/work/mine/plumber/deps/gen_server2/.git/ Already on 'master' ==> gen_server2 (get-deps) t4@malachi:plumber $ rebar check-deps ==> gen_server2 (check-deps) ==> plumber (check-deps) t4@malachi:plumber $