From eec43aaccb3222c838091ac4eb8f8780d921d4cc Mon Sep 17 00:00:00 2001
From: mitchell <70453897+orbitalquark@users.noreply.github.com>
Date: Fri, 22 Jan 2021 15:57:13 -0500
Subject: `io.get_project_root()` accepts an optional flag for returning a
 submodule root. This is for systems like git that have '.git' files (not
 directories) for submodules under a parent '.git' directory.

---
 test/test.lua | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

(limited to 'test')

diff --git a/test/test.lua b/test/test.lua
index 8503615d..e3fb296b 100644
--- a/test/test.lua
+++ b/test/test.lua
@@ -521,6 +521,20 @@ function test_file_io_get_project_root()
   assert_equal(io.get_project_root(_HOME .. '/core'), _HOME)
   assert_equal(io.get_project_root(_HOME .. '/core/init.lua'), _HOME)
   assert_equal(io.get_project_root('/tmp'), nil)
+  lfs.chdir(cwd)
+
+  -- Test git submodules.
+  local dir = os.tmpname()
+  os.remove(dir)
+  lfs.mkdir(dir)
+  lfs.mkdir(dir .. '/.git')
+  lfs.mkdir(dir .. '/foo')
+  io.open(dir .. '/foo/.git', 'w'):write():close() -- simulate submodule
+  assert_equal(io.get_project_root(dir .. '/foo/bar.txt'), dir)
+  io.open_file(dir .. '/foo/bar.txt')
+  assert_equal(io.get_project_root(true), dir .. '/foo')
+  buffer:close()
+  os.execute('rm -r ' .. dir)
 
   assert_raises(function() io.get_project_root(1) end, 'string/nil expected, got number')
 end
-- 
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