rebar3-release.nix

{ stdenv
, erlang
, rebar3WithPlugins
, openssl
, lib
}:

{ pname
, version
, src
, beamDeps ? [ ]
, buildPlugins ? [ ]
, checkouts ? null
, releaseType
, buildInputs ? [ ]
, setupHook ? null
, profile ? "default"
, installPhase ? null
, buildPhase ? null
, configurePhase ? null
, meta ? { }
, ...
}@attrs:

let
  shell = drv: stdenv.mkDerivation {
    name = "interactive-shell-${drv.pname}";
    buildInputs = [ drv ];
  };

  customPhases = lib.filterAttrs
    (_: v: v != null)
    { inherit setupHook configurePhase buildPhase installPhase; };

  # When using the `beamDeps` argument, it is important that we use
  # `rebar3WithPlugins` here even when there are no plugins. The vanilla
  # `rebar3` package is an escript archive with bundled dependencies which can
  # interfere with those in the app we are trying to build. `rebar3WithPlugins`
  # doesn't have this issue since it puts its own deps last on the code path.
  rebar3 = rebar3WithPlugins {
    plugins = buildPlugins;
  };

  pkg =
    assert beamDeps != [ ] -> checkouts == null;
    self: stdenv.mkDerivation (attrs // {

      name = "${pname}-${version}";
      inherit version pname;

      buildInputs = buildInputs ++ [ erlang rebar3 openssl ] ++ beamDeps;

      # ensure we strip any native binaries (eg. NIFs, ports)
      stripDebugList = lib.optional (releaseType == "release") "rel";

      inherit src;

      REBAR_IGNORE_DEPS = beamDeps != [ ];

      configurePhase = ''
        runHook preConfigure
        ${lib.optionalString (checkouts != null)
        "cp --no-preserve=all -R ${checkouts}/_checkouts ."}
        runHook postConfigure
      '';

      buildPhase = ''
        runHook preBuild
        HOME=. DEBUG=1 rebar3 as ${profile} ${if releaseType == "escript"
                                              then "escriptize"
                                              else "release"}
        runHook postBuild
      '';

      installPhase = ''
        runHook preInstall
        dir=${if releaseType == "escript"
              then "bin"
              else "rel"}
        mkdir -p "$out/$dir" "$out/bin"
        cp -R --preserve=mode "_build/${profile}/$dir" "$out"
        ${lib.optionalString (releaseType == "release")
          "find $out/rel/*/bin -type f -executable -exec ln -s -t $out/bin {} \\;"}
        runHook postInstall
      '';

      # Release will generate a binary which will cause a read null byte failure, see #261354
      postInstall = lib.optionalString (releaseType == "escript") ''
        for dir in $out/rel/*/erts-*; do
          echo "ERTS found in $dir - removing references to erlang to reduce closure size"
          for f in $dir/bin/{erl,start}; do
            substituteInPlace "$f" --replace "${erlang}/lib/erlang" "''${dir/\/erts-*/}"
          done
        done
      '';

      meta = {
        inherit (erlang.meta) platforms;
      } // meta;

      passthru = ({
        packageName = pname;
        env = shell self;
      } // (if attrs ? passthru then attrs.passthru else { }));
    } // customPhases);
in
lib.fix pkg