rayex
Cannot compile an Erlang dependency in an Elixir project
Hi,
I am using the following versions:
Erlang/OTP 27 [erts-15.1] [source] [64-bit] [smp:8:8] [ds:8:8:10] [async-threads:1] [jit:ns]
Elixir 1.18.4 (compiled with Erlang/OTP 27)
I am compiling an Identicon project based on the one by Stephen Grider.
In this project, I use the following dependency:
{:egd24, “~> 0.10”}
Unfortunately, when compiling this dependency, I get a compile error:
mix deps.compile egd24
===> Analyzing applications...
===> Compiling string_compat
===> Compiling bbmustache
===> Compiling _build/default/plugins/bbmustache/src/bbmustache.erl failed
ââ _build/default/plugins/bbmustache/src/bbmustache.erl:
â
622 â -spec check_data_type(data() | term()) -> boolean() | maybe.
â â°ââ syntax error before: 'maybe'
ââ _build/default/plugins/bbmustache/src/bbmustache.erl:
â
624 â check_data_type([]) -> maybe;
â â°ââ syntax error before: ';'
ââ _build/default/plugins/bbmustache/src/bbmustache.erl:
â
181 â case check_data_type(Data) of
â â°ââ function check_data_type/1 undefined
ââ _build/default/plugins/bbmustache/src/bbmustache.erl:
â
207 â case check_data_type(Value) of
â â°ââ function check_data_type/1 undefined
ââ _build/default/plugins/bbmustache/src/bbmustache.erl:
â
592 â case check_data_type(Data) =:= true andalso find_data(convert_keytype(Key, State), Data) of
â â°ââ function check_data_type/1 undefined
Any help appreciated…
Thanks, 
Most Liked
al2o3cr
maybe was introduced as an Erlang feature in OTP 27.
You can disable it partially using a couple different methods:
I suspect there’s a way to pass the required options for just one dependency when building with mix deps, but I don’t see a good example of it.
The easiest approach would be to copy bbmustache locally and add -feature(maybe_expr, disable) to the top of bbmustache.erl.
rayex
Hi,
I found a better solution thanks to the advise of Hinagiku Soranoba (the publisher of bbmustache).
I updated file rebar.config of the egd app to use the latest version of rebar3_appup_pluginlike so:
%% -*- erlang -*-
% {plugins, [rebar3_appup_plugin]}.
{plugins, [{rebar3_appup_plugin, "2.4.8"}]}.
{provider_hooks, [{post, [{compile, {appup, compile}},
{clean, {appup, clean}}]}
]}.
{otpdoc_opts, [{edoc_modules, [egd]}]}.
%% vim: ft=erlang
Popular in Troubleshooting
Other popular topics
Latest on Elixir Forum
Sponsor Spotlight
We build reliable cloud platforms for business-critical systems.
Categories:
Sub Categories:
Forums
Our Sponsors
Build Elixir applications with speed and confidence.
Supporting innovation across the BEAM ecosystem.
We build reliable cloud platforms for business-critical systems.
Catch errors, track performance, monitor hosts and more.
Develop your skills with books, videos, and courses.
Producing high quality Elixir screencasts since 2017.
The deployment platform built for Elixir: PaaS ease, VPS control.
Courses that'll move you from confusion to "Aha, now I get it!"