Add RemoteConverger.post_converge/0 callback (elixir-lang#5074)

lib/mix/lib/mix/dep/converger.ex

@@ -48,6 +48,7 @@ defmodule Mix.Dep.Converger do
   """
   def converge(acc, lock, opts, callback) do
     {deps, acc, lock} = all(acc, lock, opts, callback)
+    if remote = Mix.RemoteConverger.get, do: remote.post_converge()
     {topsort(deps), acc, lock}
   end
 

lib/mix/lib/mix/hex.ex

@@ -1,6 +1,6 @@
 defmodule Mix.Hex do
   @moduledoc false
-  @hex_requirement  ">= 0.5.0"
+  @hex_requirement  ">= 0.14.0"
   @hex_mirror       "https://repo.hex.pm"
 
   @doc """

lib/mix/lib/mix/remote_converger.ex

@@ -24,6 +24,12 @@ defmodule Mix.RemoteConverger do
   """
   @callback deps(Mix.Dep.t, map) :: [atom]
 
+  @doc """
+  Called after all convergers have run so that the remote
+  converger can perform clean up.
+  """
+  @callback post_converge() :: any
+
   @doc """
   Gets registered remote converger.
   """

lib/mix/test/mix/dep_test.exs

@@ -248,15 +248,14 @@ defmodule Mix.DepTest do
     @behaviour Mix.RemoteConverger
 
     def remote?(_app), do: true
+    def deps(_dep, _lock), do: []
+    def post_converge, do: :ok
 
     def converge(deps, lock) do
       Process.put(:remote_converger, deps)
       lock
     end
 
-    def deps(_dep, _lock) do
-      []
-    end
   end
 
   test "remote converger" do
@@ -305,15 +304,13 @@ defmodule Mix.DepTest do
     @behaviour Mix.RemoteConverger
 
     def remote?(_app), do: false
+    def deps(_dep, _lock), do: :ok
+    def post_converge, do: :ok
 
     def converge(_deps, lock) do
       Process.put(:remote_converger, true)
       lock
     end
-
-    def deps(_dep, _lock) do
-      []
-    end
   end
 
   test "remote converger is not invoked if deps diverge" do