mixRelease: integrate mix2nix

1 files changed, 17 insertions, 9 deletions

diff --git a/pkgs/development/beam-modules/mix-release.nix b/pkgs/development/beam-modules/mix-release.nix
index 320fcaa9c9b..774af2e5ec9 100644
--- a/pkgs/development/beam-modules/mix-release.nix
+++ b/pkgs/development/beam-modules/mix-release.nix
@@ -8,15 +8,23 @@
 , enableDebugInfo ? false
 , mixEnv ? "prod"
 , compileFlags ? [ ]
-, mixDeps ? null
+  # mix fixed output derivation dependencies
+, mixFodDeps ? null
+  # mix dependencies generated by mix2nix
+  # this assumes each dependency is built by buildMix or buildRebar3
+  # each dependency needs to have a setup hook to add the lib path to $ERL_LIBS
+  # this is how mix will find dependencies
+, mixNixDeps ? { }
 , ...
 }@attrs:
 let
-  overridable = builtins.removeAttrs attrs [ "compileFlags" ];
-
+  # remove non standard attributes that cannot be coerced to strings
+  overridable = builtins.removeAttrs attrs [ "compileFlags" "mixNixDeps" ];
 in
+assert mixNixDeps != { } -> mixFodDeps == null;
 stdenv.mkDerivation (overridable // {
   nativeBuildInputs = nativeBuildInputs ++ [ erlang hex elixir makeWrapper git ];
+  buildInputs = builtins.attrValues mixNixDeps;
 
   MIX_ENV = mixEnv;
   MIX_DEBUG = if enableDebugInfo then 1 else 0;
@@ -29,17 +37,17 @@ stdenv.mkDerivation (overridable // {
   postUnpack = ''
     export HEX_HOME="$TEMPDIR/hex"
     export MIX_HOME="$TEMPDIR/mix"
-    # compilation of the dependencies will require
-    # that the dependency path is writable
-    # thus a copy to the TEMPDIR is inevitable here
-    export MIX_DEPS_PATH="$TEMPDIR/deps"
 
     # Rebar
     export REBAR_GLOBAL_CONFIG_DIR="$TEMPDIR/rebar3"
     export REBAR_CACHE_DIR="$TEMPDIR/rebar3.cache"
 
-    ${lib.optionalString (mixDeps != null) ''
-      cp --no-preserve=mode -R "${mixDeps}" "$MIX_DEPS_PATH"
+    ${lib.optionalString (mixFodDeps != null) ''
+      # compilation of the dependencies will require
+      # that the dependency path is writable
+      # thus a copy to the TEMPDIR is inevitable here
+      export MIX_DEPS_PATH="$TEMPDIR/deps"
+      cp --no-preserve=mode -R "${mixFodDeps}" "$MIX_DEPS_PATH"
     ''
     }