build: remove FindLua.cmake since it's already built into cmake

FindLua.cmake is a copy from the cmake repo:
https://github.com/Kitware/CMake/blob/0419ecbcad7719614349a07189b45e341a8f2c69/Modules/FindLua.cmake.
It's a cmake module, meaning it's already shipped with cmake by default.
There have been two changes done to our version of FindLua.cmake.

The first change is that

include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)

was changed to

include(FindPackageHandleStandardArgs.cmake)

This change is required only because we have imported FindLua.cmake
module but not FindPackageHandleStandardArgs module. Had FindLua been
called as a module as intended then this file would not need changing.

The second change is that support for Lua 5.4 is added. However, support
for any version of Lua except for 5.1 is disabled since
https://github.com/neovim/neovim/pull/16633/commits/e322b5c864c771f774ddfea32f6cd5190a1af419.

Because these changes from the upstream FindLua.cmake is unnecessary I
believe we can and should use the builtin FindLua.cmake instead of our
own.

1 files changed, 0 insertions, 197 deletions

diff --git a/cmake/FindLua.cmake b/cmake/FindLua.cmake
deleted file mode 100644
index 7ba13e1f56..0000000000
--- a/cmake/FindLua.cmake
+++ /dev/null
@@ -1,197 +0,0 @@
-# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
-# file Copyright.txt or https://cmake.org/licensing for details.
-
-#.rst:
-# FindLua
-# -------
-#
-#
-#
-# Locate Lua library This module defines
-#
-# ::
-#
-#   LUA_FOUND          - if false, do not try to link to Lua
-#   LUA_LIBRARIES      - both lua and lualib
-#   LUA_INCLUDE_DIR    - where to find lua.h
-#   LUA_VERSION_STRING - the version of Lua found
-#   LUA_VERSION_MAJOR  - the major version of Lua
-#   LUA_VERSION_MINOR  - the minor version of Lua
-#   LUA_VERSION_PATCH  - the patch version of Lua
-#
-#
-#
-# Note that the expected include convention is
-#
-# ::
-#
-#   #include "lua.h"
-#
-# and not
-#
-# ::
-#
-#   #include <lua/lua.h>
-#
-# This is because, the lua location is not standardized and may exist in
-# locations other than lua/
-
-unset(_lua_include_subdirs)
-unset(_lua_library_names)
-unset(_lua_append_versions)
-
-# this is a function only to have all the variables inside go away automatically
-function(_lua_set_version_vars)
-    set(LUA_VERSIONS5 5.4 5.3 5.2 5.1 5.0)
-
-    if (Lua_FIND_VERSION_EXACT)
-        if (Lua_FIND_VERSION_COUNT GREATER 1)
-            set(_lua_append_versions ${Lua_FIND_VERSION_MAJOR}.${Lua_FIND_VERSION_MINOR})
-        endif ()
-    elseif (Lua_FIND_VERSION)
-        # once there is a different major version supported this should become a loop
-        if (NOT Lua_FIND_VERSION_MAJOR GREATER 5)
-            if (Lua_FIND_VERSION_COUNT EQUAL 1)
-                set(_lua_append_versions ${LUA_VERSIONS5})
-            else ()
-                foreach (subver IN LISTS LUA_VERSIONS5)
-                    if (NOT subver VERSION_LESS ${Lua_FIND_VERSION})
-                        list(APPEND _lua_append_versions ${subver})
-                    endif ()
-                endforeach ()
-            endif ()
-        endif ()
-    else ()
-        # once there is a different major version supported this should become a loop
-        set(_lua_append_versions ${LUA_VERSIONS5})
-    endif ()
-
-    list(APPEND _lua_include_subdirs "include/lua" "include")
-
-    foreach (ver IN LISTS _lua_append_versions)
-        string(REGEX MATCH "^([0-9]+)\\.([0-9]+)$" _ver "${ver}")
-        list(APPEND _lua_include_subdirs
-             include/lua${CMAKE_MATCH_1}${CMAKE_MATCH_2}
-             include/lua${CMAKE_MATCH_1}.${CMAKE_MATCH_2}
-             include/lua-${CMAKE_MATCH_1}.${CMAKE_MATCH_2}
-        )
-    endforeach ()
-
-    set(_lua_include_subdirs "${_lua_include_subdirs}" PARENT_SCOPE)
-    set(_lua_append_versions "${_lua_append_versions}" PARENT_SCOPE)
-endfunction(_lua_set_version_vars)
-
-function(_lua_check_header_version _hdr_file)
-    # At least 5.[012] have different ways to express the version
-    # so all of them need to be tested. Lua 5.2 defines LUA_VERSION
-    # and LUA_RELEASE as joined by the C preprocessor, so avoid those.
-    file(STRINGS "${_hdr_file}" lua_version_strings
-         REGEX "^#define[ \t]+LUA_(RELEASE[ \t]+\"Lua [0-9]|VERSION([ \t]+\"Lua [0-9]|_[MR])).*")
-
-    string(REGEX REPLACE ".*;#define[ \t]+LUA_VERSION_MAJOR[ \t]+\"([0-9])\"[ \t]*;.*" "\\1" LUA_VERSION_MAJOR ";${lua_version_strings};")
-    if (LUA_VERSION_MAJOR MATCHES "^[0-9]+$")
-        string(REGEX REPLACE ".*;#define[ \t]+LUA_VERSION_MINOR[ \t]+\"([0-9])\"[ \t]*;.*" "\\1" LUA_VERSION_MINOR ";${lua_version_strings};")
-        string(REGEX REPLACE ".*;#define[ \t]+LUA_VERSION_RELEASE[ \t]+\"([0-9])\"[ \t]*;.*" "\\1" LUA_VERSION_PATCH ";${lua_version_strings};")
-        set(LUA_VERSION_STRING "${LUA_VERSION_MAJOR}.${LUA_VERSION_MINOR}.${LUA_VERSION_PATCH}")
-    else ()
-        string(REGEX REPLACE ".*;#define[ \t]+LUA_RELEASE[ \t]+\"Lua ([0-9.]+)\"[ \t]*;.*" "\\1" LUA_VERSION_STRING ";${lua_version_strings};")
-        if (NOT LUA_VERSION_STRING MATCHES "^[0-9.]+$")
-            string(REGEX REPLACE ".*;#define[ \t]+LUA_VERSION[ \t]+\"Lua ([0-9.]+)\"[ \t]*;.*" "\\1" LUA_VERSION_STRING ";${lua_version_strings};")
-        endif ()
-        string(REGEX REPLACE "^([0-9]+)\\.[0-9.]*$" "\\1" LUA_VERSION_MAJOR "${LUA_VERSION_STRING}")
-        string(REGEX REPLACE "^[0-9]+\\.([0-9]+)[0-9.]*$" "\\1" LUA_VERSION_MINOR "${LUA_VERSION_STRING}")
-        string(REGEX REPLACE "^[0-9]+\\.[0-9]+\\.([0-9]).*" "\\1" LUA_VERSION_PATCH "${LUA_VERSION_STRING}")
-    endif ()
-    foreach (ver IN LISTS _lua_append_versions)
-        if (ver STREQUAL "${LUA_VERSION_MAJOR}.${LUA_VERSION_MINOR}")
-            set(LUA_VERSION_MAJOR ${LUA_VERSION_MAJOR} PARENT_SCOPE)
-            set(LUA_VERSION_MINOR ${LUA_VERSION_MINOR} PARENT_SCOPE)
-            set(LUA_VERSION_PATCH ${LUA_VERSION_PATCH} PARENT_SCOPE)
-            set(LUA_VERSION_STRING ${LUA_VERSION_STRING} PARENT_SCOPE)
-            return()
-        endif ()
-    endforeach ()
-endfunction(_lua_check_header_version)
-
-_lua_set_version_vars()
-
-if (LUA_INCLUDE_DIR AND EXISTS "${LUA_INCLUDE_DIR}/lua.h")
-    _lua_check_header_version("${LUA_INCLUDE_DIR}/lua.h")
-endif ()
-
-if (NOT LUA_VERSION_STRING)
-    foreach (subdir IN LISTS _lua_include_subdirs)
-        unset(LUA_INCLUDE_PREFIX CACHE)
-        find_path(LUA_INCLUDE_PREFIX ${subdir}/lua.h
-          HINTS
-            ENV LUA_DIR
-          PATHS
-          ~/Library/Frameworks
-          /Library/Frameworks
-          /sw # Fink
-          /opt/local # DarwinPorts
-          /opt/csw # Blastwave
-          /opt
-        )
-        if (LUA_INCLUDE_PREFIX)
-            _lua_check_header_version("${LUA_INCLUDE_PREFIX}/${subdir}/lua.h")
-            if (LUA_VERSION_STRING)
-                set(LUA_INCLUDE_DIR "${LUA_INCLUDE_PREFIX}/${subdir}")
-                break()
-            endif ()
-        endif ()
-    endforeach ()
-endif ()
-unset(_lua_include_subdirs)
-unset(_lua_append_versions)
-
-if (LUA_VERSION_STRING)
-    set(_lua_library_names
-        lua${LUA_VERSION_MAJOR}${LUA_VERSION_MINOR}
-        lua${LUA_VERSION_MAJOR}.${LUA_VERSION_MINOR}
-        lua-${LUA_VERSION_MAJOR}.${LUA_VERSION_MINOR}
-        lua.${LUA_VERSION_MAJOR}.${LUA_VERSION_MINOR}
-    )
-endif ()
-
-find_library(LUA_LIBRARY
-  NAMES ${_lua_library_names} lua
-  HINTS
-    ENV LUA_DIR
-  PATH_SUFFIXES lib
-  PATHS
-  ~/Library/Frameworks
-  /Library/Frameworks
-  /sw
-  /opt/local
-  /opt/csw
-  /opt
-)
-unset(_lua_library_names)
-
-if (LUA_LIBRARY)
-    # include the math library for Unix
-    if (UNIX AND NOT APPLE AND NOT BEOS)
-        find_library(LUA_MATH_LIBRARY m)
-        set(LUA_LIBRARIES "${LUA_LIBRARY};${LUA_MATH_LIBRARY}")
-
-        # include dl library for statically-linked Lua library
-        get_filename_component(LUA_LIB_EXT ${LUA_LIBRARY} EXT)
-        if(LUA_LIB_EXT STREQUAL CMAKE_STATIC_LIBRARY_SUFFIX)
-          list(APPEND LUA_LIBRARIES ${CMAKE_DL_LIBS})
-        endif()
-
-    # For Windows and Mac, don't need to explicitly include the math library
-    else ()
-        set(LUA_LIBRARIES "${LUA_LIBRARY}")
-    endif ()
-endif ()
-
-include(FindPackageHandleStandardArgs)
-# handle the QUIETLY and REQUIRED arguments and set LUA_FOUND to TRUE if
-# all listed variables are TRUE
-FIND_PACKAGE_HANDLE_STANDARD_ARGS(Lua
-                                  REQUIRED_VARS LUA_LIBRARIES LUA_INCLUDE_DIR
-                                  VERSION_VAR LUA_VERSION_STRING)
-
-mark_as_advanced(LUA_INCLUDE_DIR LUA_LIBRARY LUA_MATH_LIBRARY)