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Refactor the lua dependency checking.

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This is in preparation for the next step, which is to find a suitable
lua interpreter, rather than just erroring when an interpreter is found
but doesn't have the necessary dependencies.

Helped-by: John Szakmeister <john@szakmeister.net>
This commit is contained in:
Rui Abreu Ferreira 2014-07-11 12:12:10 +01:00 committed by John Szakmeister
parent e47968537c
commit 6f0d3c0e77
2 changed files with 45 additions and 21 deletions
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28
CMakeLists.txt
View File

@ -98,29 +98,15 @@ if(NOT EXISTS ${LUA_PRG})
find_program(LUA_PRG lua)
endif()
if(EXISTS ${LUA_PRG})
message(STATUS "Using the lua interpreter ${LUA_PRG}")
else()
message(FATAL_ERROR "A lua interpreter is required for building the Neovim")
include(LuaHelpers)
set(LUA_DEPENDENCIES lpeg cmsgpack)
check_lua_deps(${LUA_PRG} "${LUA_DEPENDENCIES}" LUA_PRG_WORKS)
if(NOT LUA_PRG_WORKS)
message(FATAL_ERROR "A suitable Lua interpreter was not found")
endif()
execute_process(COMMAND ${LUA_PRG} -e "require('lpeg')"
RESULT_VARIABLE LUA_LPEG_MISSING
ERROR_QUIET)
if(${LUA_LPEG_MISSING})
message(FATAL_ERROR
"The 'lpeg' lua package is required for building Neovim")
endif()
execute_process(COMMAND ${LUA_PRG} -e "require('cmsgpack')"
RESULT_VARIABLE LUA_MSGPACK_MISSING
ERROR_QUIET)
if(${LUA_MSGPACK_MISSING})
message(FATAL_ERROR
"The 'cmsgpack' lua package is required for building Neovim")
endif()
message(STATUS "Using the Lua interpreter ${LUA_PRG}")
add_subdirectory(config)
add_subdirectory(src/nvim)

38
cmake/LuaHelpers.cmake Normal file
View File

@ -0,0 +1,38 @@
#
# Functions to help checking for a Lua interpreter
#
# Check if a module is available in Lua
function(check_lua_module LUA_PRG_PATH MODULE RESULT_VAR)
execute_process(COMMAND ${LUA_PRG_PATH} -e "require('${MODULE}')"
RESULT_VARIABLE module_missing
ERROR_QUIET)
if(module_missing)
message(STATUS
"[${LUA_PRG_PATH}] The '${MODULE}' lua package is required for building Neovim")
set(${RESULT_VAR} False PARENT_SCOPE)
else()
set(${RESULT_VAR} True PARENT_SCOPE)
endif()
endfunction()
# Check Lua interpreter for dependencies
function(check_lua_deps LUA_PRG_PATH MODULES RESULT_VAR)
# Check if the lua interpreter at the given path
# satisfies all Neovim dependencies
message(STATUS "Checking Lua interpreter ${LUA_PRG_PATH}")
if(NOT EXISTS ${LUA_PRG_PATH})
message(STATUS
"[${LUA_PRG_PATH}] file not found")
endif()
foreach(module ${MODULES})
check_lua_module(${LUA_PRG_PATH} ${module} has_module)
if(NOT has_module)
set(${RESULT_VAR} False PARENT_SCOPE)
return()
endif()
endforeach()
set(${RESULT_VAR} True PARENT_SCOPE)
endfunction()