Umbrella child applications are not added to the PLT

[mguimas]

Environment

$ elixir --version
Erlang/OTP 21 [erts-10.2.3] [source] [64-bit] [smp:4:4] [ds:4:4:10] [async-threads:1] [hipe]

Elixir 1.8.1 (compiled with Erlang/OTP 21)

$ cat mix.lock | grep dialyxir
  "dialyxir": {:hex, :dialyxir, "1.0.0-rc.6", "78e97d9c0ff1b5521dd68041193891aebebce52fc3b93463c0a6806874557d7d", [:mix], [{:erlex, "~> 0.2.1", [hex: :erlex, repo: "hexpm", optional: false]}], "hexpm"}

Current behavior

After cleaning everything under _build, and running mix dialyzer --plt --force-check from the umbrella root directory, some umbrella child applications are not added to the generated PLT.

The umbrella child applications that are added automatically to the PLT are those that are dependencies of other child applications, and those that are explicitly included in the mix.exs file of the umbrella project, like this

def project do
  [
    ...
    dialyzer: [plt_add_apps: [...]]
   ]
end

Expected behavior

All umbrella child applications should be added automatically to the PLT.

[vtm9]

same in 1.2.0

[vtm9]

as a temporary solution, i've used

      dialyzer: [
        paths: [
          Path.join(File.cwd!(), "_build/dev/lib/app1/ebin"),
          Path.join(File.cwd!(), "_build/dev/lib/app2/ebin")
        ],
]