Repromise example repo (esy)

Repromise is a proposed Reason binding to promises, that also comes with an isomorphic native promise implementation. This repo shows how to use the native promises with esy.

main.re is a simple program that prints Hello, world!, asynchronously.

The interesting files are package.json and jbuild, which show how to depend on the Repromise development repo. The empty *.opam file is needed for Jbuilder (Dune) to recognize the repo as an OCaml/Reason package.

To build and run, first install esy with

npm install -g esy

Then, install your system's development package for libuv 1.x. On Ubuntu, this is done with

sudo apt install libuv1-dev

Then do

git clone https://github.com/aantron/repromise-example-esy.git
cd repromise-example-esy
esy install
esy build
esy jbuilder exec ./main.exe

This may take a little while to build all the OCaml deps, but then you should see Hello, world!.

If you see an error message about missing makeinfo from the libffi part of the build, you can install it with

sudo apt install texinfo

on Ubuntu, and similar commands on other systems. We will remove the libffi dependency in the future. We also plan to vendor libuv.