From 90909e9362dacb5ece17c7baaffe33b16d106ce7 Mon Sep 17 00:00:00 2001
From: Florian Walch <florian@fwalch.com>
Date: Tue, 29 Sep 2015 21:22:55 +0200
Subject: CMake: Force use of project directory to look for Git data.

Before this change, building Neovim would recursively search parent
directories for a .git directory. If Neovim was downloaded as a tarball
(i.e. without a .git directory), but placed in a subdirectory of
a Git repository, this caused a CMake error. Such a situation could
occur when packaging Neovim, for example.

Unfortunately, the previous attempt in #3317 did not fix this problem.
---
 CMakeLists.txt                        | 2 +-
 cmake/GetGitRevisionDescription.cmake | 8 +++++++-
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index f4e5e51bcb..70be0be6d4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -52,8 +52,8 @@ set(NVIM_VERSION_MINOR 0)
 set(NVIM_VERSION_PATCH 0)
 set(NVIM_VERSION_PRERELEASE "-alpha")
 
+file(TO_CMAKE_PATH ${CMAKE_CURRENT_LIST_DIR}/.git FORCED_GIT_DIR)
 include(GetGitRevisionDescription)
-file(TO_NATIVE_PATH ${CMAKE_CURRENT_LIST_DIR}/.git GIT_DIR)
 if(NVIM_VERSION_PRERELEASE)
   get_git_head_revision(GIT_REFSPEC NVIM_VERSION_COMMIT)
 
diff --git a/cmake/GetGitRevisionDescription.cmake b/cmake/GetGitRevisionDescription.cmake
index 1e0968ec3b..5044c682e4 100644
--- a/cmake/GetGitRevisionDescription.cmake
+++ b/cmake/GetGitRevisionDescription.cmake
@@ -42,7 +42,13 @@ set(__get_git_revision_description YES)
 get_filename_component(_gitdescmoddir ${CMAKE_CURRENT_LIST_FILE} PATH)
 
 function(get_git_dir _gitdir)
-  # check GIT_DIR in environment first
+  # check FORCED_GIT_DIR first
+  if(FORCED_GIT_DIR)
+    set(${_gitdir} ${FORCED_GIT_DIR} PARENT_SCOPE)
+    return()
+  endif()
+
+  # check GIT_DIR in environment
   set(GIT_DIR $ENV{GIT_DIR})
   if(NOT GIT_DIR)
     set(GIT_PARENT_DIR ${CMAKE_CURRENT_SOURCE_DIR})
-- 
cgit