1 files changed, 49 insertions, 0 deletions
diff --git a/src/lustre_add_ffi.erl b/src/lustre_add_ffi.erl
new file mode 100644
index 0000000..d7c5030
--- /dev/null
+++ b/src/lustre_add_ffi.erl
@@ -0,0 +1,49 @@
+-module(lustre_add_ffi).
+-export([
+    get_cpu/0,
+    get_esbuild/1,
+    get_os/0,
+    unzip_esbuild/1
+]).
+
+get_os() ->
+    case os:type() of
+        {win32, _} -> <<"win32">>;
+        {unix, darwin} -> <<"darwin">>;
+        {unix, linux} -> <<"linux">>;
+        {_, Unknown} -> atom_to_binary(Unknown, utf8)
+    end.
+
+get_cpu() ->
+    case erlang:system_info(os_type) of
+        {unix, _} ->
+            [Arch, _] = string:split(erlang:system_info(system_architecture), "-"),
+            list_to_binary(Arch);
+        {win32, _} ->
+            case erlang:system_info(wordsize) of
+                4 -> {ok, <<"ia32">>};
+                8 -> {ok, <<"x64">>}
+            end
+    end.
+
+get_esbuild(Url) ->
+    inets:start(),
+    ssl:start(),
+
+    case httpc:request(get, {Url, []}, [], [{body_format, binary}]) of
+        {ok, {{_, 200, _}, _, Zip}} -> {ok, Zip};
+        {ok, Res} -> {error, {network_error, Res}};
+        {error, Err} -> {error, {network_error, Err}}
+    end.
+
+unzip_esbuild(Zip) ->
+    Result =
+        erl_tar:extract({binary, Zip}, [
+            memory, compressed, {files, ["package/bin/esbuild"]}
+        ]),
+
+    case Result of
+        {ok, [{_, Esbuild}]} -> {ok, Esbuild};
+        {ok, Res} -> {error, {unzip_error, Res}};
+        {error, Err} -> {error, {unzip_error, Err}}
+    end.