beam-modules: add fetch-mix-deps

1 files changed, 41 insertions, 0 deletions

diff --git a/pkgs/development/beam-modules/fetch-mix-deps.nix b/pkgs/development/beam-modules/fetch-mix-deps.nix
new file mode 100644
index 000000000000..31f0821e81de
--- /dev/null
+++ b/pkgs/development/beam-modules/fetch-mix-deps.nix
@@ -0,0 +1,41 @@
+{ stdenvNoCC, elixir, hex, rebar, rebar3, cacert }:
+
+{ name, version, sha256, src, mixEnv ? "prod", debug ? false, meta ? { } }:
+
+with stdenvNoCC.lib;
+
+stdenvNoCC.mkDerivation ({
+  name = "mix-deps-${name}-${version}";
+
+  phases = [ "configurePhase" "downloadPhase" ];
+
+  nativeBuildInputs = [ elixir hex cacert ];
+
+  inherit src;
+
+  MIX_ENV = mixEnv;
+  MIX_REBAR = "${rebar}/bin/rebar";
+  MIX_REBAR3 = "${rebar3}/bin/rebar3";
+  MIX_DEBUG = if debug then 1 else 0;
+
+  configurePhase = ''
+    mkdir -p $out/deps
+    mkdir -p $out/.hex
+    export HEX_HOME="$out/.hex";
+    export MIX_HOME="$TEMPDIR/.mix";
+    export MIX_DEPS_PATH="$out/deps";
+  '';
+
+  downloadPhase = ''
+    ln -s ${src}/mix.exs ./mix.exs
+    ln -s ${src}/mix.lock ./mix.lock
+    mix deps.get --only ${mixEnv}
+  '';
+
+  outputHashAlgo = "sha256";
+  outputHashMode = "recursive";
+  outputHash = sha256;
+
+  impureEnvVars = stdenvNoCC.lib.fetchers.proxyImpureEnvVars;
+  inherit meta;
+})