Bring back autocomplete for remote nodes, closes #8743

2 files changed, 21 insertions, 1 deletions

diff --git a/lib/iex/lib/iex.ex b/lib/iex/lib/iex.ex
index 33e77811a..0bf033fb5 100644
--- a/lib/iex/lib/iex.ex
+++ b/lib/iex/lib/iex.ex
@@ -794,10 +794,17 @@ defmodule IEx do
   defp set_expand_fun do
     gl = Process.group_leader()
 
+    expand_fun =
+      if node(gl) != node() do
+        IEx.Autocomplete.remsh(node())
+      else
+        &IEx.Autocomplete.expand/1
+      end
+
     # expand_fun is not supported by a shell variant
     # on Windows, so we do two IO calls, not caring
     # about the result of the expand_fun one.
-    _ = :io.setopts(gl, expand_fun: &IEx.Autocomplete.expand/1)
+    _ = :io.setopts(gl, expand_fun: expand_fun)
     :io.setopts(gl, binary: true, encoding: :unicode)
   end
 
diff --git a/lib/iex/lib/iex/autocomplete.ex b/lib/iex/lib/iex/autocomplete.ex
index 9eeb83ff6..2731e1d09 100644
--- a/lib/iex/lib/iex/autocomplete.ex
+++ b/lib/iex/lib/iex/autocomplete.ex
@@ -2,6 +2,19 @@ defmodule IEx.Autocomplete do
   @moduledoc false
 
   @doc """
+  Provides one helper function that is injected into connecting
+  remote nodes to properly handle autocompletion.
+  """
+  def remsh(node) do
+    fn e ->
+      case :rpc.call(node, IEx.Autocomplete, :expand, [e]) do
+        {:badrpc, _} -> {:no, '', []}
+        r -> r
+      end
+    end
+  end
+
+  @doc """
   The expansion logic.
 
   Some of the expansion has to be use the current shell