From 50b9b456f7a3ea188fd3916822acdacc894f2e25 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Eric=20Meadows-J=C3=B6nsson?=
 <eric.meadows.jonsson@gmail.com>
Date: Tue, 21 Jun 2016 23:13:29 +0200
Subject: [PATCH] Do not load mix.exs file for rebar deps

---
 lib/mix/lib/mix/dep/loader.ex         | 30 +++++++++++++--------------
 lib/mix/lib/mix/tasks/deps.compile.ex |  6 +++---
 2 files changed, 18 insertions(+), 18 deletions(-)

diff --git a/lib/mix/lib/mix/dep/loader.ex b/lib/mix/lib/mix/dep/loader.ex
index d1d09cabee4..72ea016df8c 100644
--- a/lib/mix/lib/mix/dep/loader.ex
+++ b/lib/mix/lib/mix/dep/loader.ex
@@ -266,22 +266,22 @@ defmodule Mix.Dep.Loader do
     {dep, deps}
   end
 
-  defp rebar_dep(%Mix.Dep{app: app} = dep, children, manager) do
-    Mix.Dep.in_dependency(dep, fn _ ->
-      config = Mix.Rebar.load_config(".")
-      extra = Mix.Rebar.merge_config(dep.extra, config)
-      deps =
-        if children do
-          from = Path.absname("rebar.config")
-          # Pass the manager because deps of a Rebar project need
-          # to default to Rebar if we cannot chose a manager from
-          # files in the dependency
-          Enum.map(children, &to_dep(&1, from, manager))
-        else
-          rebar_children(app, config, extra, manager)
-        end
-      {%{dep | extra: extra}, deps}
+  defp rebar_dep(%Mix.Dep{app: app, opts: opts} = dep, children, manager) do
+    config = File.cd!(opts[:dest], fn ->
+      Mix.Rebar.load_config(".")
     end)
+    extra = Mix.Rebar.merge_config(dep.extra, config)
+    deps =
+      if children do
+        from = Path.absname("rebar.config")
+        # Pass the manager because deps of a Rebar project need
+        # to default to Rebar if we cannot chose a manager from
+        # files in the dependency
+        Enum.map(children, &to_dep(&1, from, manager))
+      else
+        rebar_children(app, config, extra, manager)
+      end
+    {%{dep | extra: extra}, deps}
   end
 
   defp make_dep(dep) do
diff --git a/lib/mix/lib/mix/tasks/deps.compile.ex b/lib/mix/lib/mix/tasks/deps.compile.ex
index c32c8f380a0..feb8e12e7a1 100644
--- a/lib/mix/lib/mix/tasks/deps.compile.ex
+++ b/lib/mix/lib/mix/tasks/deps.compile.ex
@@ -202,15 +202,15 @@ defmodule Mix.Tasks.Deps.Compile do
     end
   end
 
-  defp do_command(%Mix.Dep{app: app} = dep, config, command, print_app?, env \\ []) do
-    Mix.Dep.in_dependency dep, fn _ ->
+  defp do_command(%Mix.Dep{app: app, opts: opts}, config, command, print_app?, env \\ []) do
+    File.cd!(opts[:dest], fn ->
       env = [{"ERL_LIBS", Path.join(config[:env_path], "lib")}] ++ env
       if Mix.shell.cmd(command, print_app: print_app?, env: env) != 0 do
         Mix.raise "Could not compile dependency #{inspect app}, \"#{command}\" command failed. " <>
           "You can recompile this dependency with \"mix deps.compile #{app}\", update it " <>
           "with \"mix deps.update #{app}\" or clean it with \"mix deps.clean #{app}\""
       end
-    end
+    end)
     true
   end