rebar.config.script

%% -*- tab-width: 4;erlang-indent-level: 4;indent-tabs-mode: nil -*-
%% ex: ft=erlang ts=4 sw=4 et
%%

%% check if we build it statically or not
IsStatic = case os:getenv("ENABLE_STATIC") of
    "no" -> false;
    _ -> true
end,

%% set common dor
{ok, Cwd} = file:get_cwd(),
StaticDir = filename:join([Cwd, "c_src", ".libs"]),

%% helpers
Include = fun(Name) ->
        filename:join([StaticDir, Name, "include"])
end,

Lib = fun(Name, FName) ->
        filename:join([StaticDir, Name, "lib", FName])
end,

%% set top directory environment used by build_czmq.sh
os:putenv("CORE_TOP", filename:join([Cwd, "c_src"])),

%% set the flags to build czmq_port and czmq_benchmark
PortEnv = case IsStatic of
    true ->
        [{"CFLAGS", "-Wall -c -g -O2" ++
                    " -I" ++ Include("libsodium") ++
                    " -I" ++ Include("libzmq") ++
                    " -I" ++ Include("czmq")},
         {"LDFLAGS", "-lerl_interface -lei -lstdc++ -lpthread -lrt" ++
                  " " ++ Lib("czmq", "libczmq.a") ++
                  " " ++ Lib("libzmq", "libzmq.a") ++
                  " " ++ Lib("libsodium", "libsodium.a") ++
                  " -lstdc++"}];
    false ->
        [{"CFLAGS", "-Wall -c -g -O2"},
         {"LDFLAGS", "-lerl_interface -lei -lstdc++ -lpthread -lczmq -lzmq"}]
end,

%% config to build czmq_port and czmq_benchmark
PortInfo0 = [{port_env, PortEnv},
             {port_specs, [
                {filename:join(["priv", "czmq-port"]),
                                ["c_src/czmq_port.c",
                                 "c_src/erl_czmq.c",
                                 "c_src/vector.c"]},
                {filename:join(["priv", "czmq-benchmark"]),
                                ["c_src/czmq_benchmark.c",
                                 "c_src/erl_czmq.c",
                                 "c_src/vector.c"]}
            ]}],

PortInfo = case IsStatic of
    true ->
        PortInfo0 ++
        [{pre_hooks, [{compile, "./c_src/build_czmq.sh"}]},
         {post_hooks, [{clean, "./c_src/build_czmq.sh clean"}]}];
    false ->
        PortInfo0
end,

%% update the rebar config
lists:keymerge(1,lists:keysort(1, PortInfo), lists:keysort(1, CONFIG)).