From 0b9813f25d5b78cfd30f2a2b3ee784ee973dc937 Mon Sep 17 00:00:00 2001
From: anotherzxx <30956192+anotherzxx@users.noreply.github.com>
Date: Wed, 23 Aug 2023 08:34:37 +0800
Subject: [PATCH 1/2] get third dep name from definition

---
 .../lib/language_server/providers/hover.ex     | 18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)

diff --git a/apps/language_server/lib/language_server/providers/hover.ex b/apps/language_server/lib/language_server/providers/hover.ex
index c837aee34..aff82b01e 100644
--- a/apps/language_server/lib/language_server/providers/hover.ex
+++ b/apps/language_server/lib/language_server/providers/hover.ex
@@ -73,7 +73,7 @@ defmodule ElixirLS.LanguageServer.Providers.Hover do
         ""
 
       true ->
-        dep = subject |> root_module_name() |> dep_name(project_dir) |> URI.encode()
+        dep = subject |> dep_name(project_dir) |> URI.encode()
 
         cond do
           func?(title) ->
@@ -114,16 +114,24 @@ defmodule ElixirLS.LanguageServer.Providers.Hover do
     end
   end
 
-  defp dep_name(root_mod_name, project_dir) do
+  defp dep_name(subject, project_dir) do
+    root_mod_name = root_module_name(subject)
+
     if not elixir_mod_exported?(root_mod_name) do
       ""
     else
       s = root_mod_name |> source()
 
       cond do
-        third_dep?(s, project_dir) -> third_dep_name(s, project_dir)
-        builtin?(s) -> builtin_dep_name(s)
-        true -> ""
+        third_dep?(s, project_dir) ->
+          %ElixirSense.Location{file: source} = ElixirSense.definition(subject, 1, 1)
+          third_dep_name(source, project_dir)
+
+        builtin?(s) ->
+          builtin_dep_name(s)
+
+        true ->
+          ""
       end
     end
   end

From 28452fafccf5841345c7da09d7ebd01736522f3e Mon Sep 17 00:00:00 2001
From: anotherzxx <30956192+anotherzxx@users.noreply.github.com>
Date: Wed, 23 Aug 2023 15:17:47 +0800
Subject: [PATCH 2/2] handle definition return nil file

---
 .../lib/language_server/providers/hover.ex               | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/apps/language_server/lib/language_server/providers/hover.ex b/apps/language_server/lib/language_server/providers/hover.ex
index aff82b01e..bd9adb778 100644
--- a/apps/language_server/lib/language_server/providers/hover.ex
+++ b/apps/language_server/lib/language_server/providers/hover.ex
@@ -124,8 +124,13 @@ defmodule ElixirLS.LanguageServer.Providers.Hover do
 
       cond do
         third_dep?(s, project_dir) ->
-          %ElixirSense.Location{file: source} = ElixirSense.definition(subject, 1, 1)
-          third_dep_name(source, project_dir)
+          case ElixirSense.definition(subject, 1, 1) do
+            %ElixirSense.Location{file: source} when not is_nil(source) ->
+              third_dep_name(source, project_dir)
+
+            _ ->
+              third_dep_name(s, project_dir)
+          end
 
         builtin?(s) ->
           builtin_dep_name(s)