# 防止重复引入
if(Gmsh_ALREADY_INCLUDED)
	return()
endif()
set(Gmsh_ALREADY_INCLUDED 1)

# find_path 搜索包含某个文件的路径
# 如果在某个路径下发现了该文件，该结果会被存储到该变量中；如果没有找到，存储的结果将会是<VAR>-NOTFOUND
find_path(Gmsh_DIRS 
	NAMES 
		gmsh.exe gmsh
	PATHS 
		${CMAKE_SOURCE_DIR}/extlib/Gmsh 
	NO_SYSTEM_ENVIRONMENT_PATH
	NO_CMAKE_SYSTEM_PATH
)

set(Gmsh_VERSION_MAJOR 4)
set(Gmsh_VERSION_MINOR 8)
set(Gmsh_VERSION_PATCH 0)

set(Gmsh_VERSION "${Gmsh_VERSION_MAJOR}.${Gmsh_VERSION_MINOR}.${Gmsh_VERSION_PATCH}")

# find_path(Gmsh_INCLUDE_DIRS
# 	NAMES
# 		gmsh.h
# 	HINTS
# 		${Gmsh_DIRS}
# )

# find_path(Gmsh_LIBRARY_DIRS
# 	NAMES
# 		libgmsh.so.4.11
# 	HINTS
# 		${Gmsh_DIRS}
# )

# set(Gmsh_LIBRARIES GJDM::Gmsh)

if(CMAKE_SYSTEM_NAME STREQUAL "Windows")
	set(Gmsh_EXECUTABLE "${Gmsh_DIRS}/gmsh.exe")
else()
	set(Gmsh_EXECUTABLE "${Gmsh_DIRS}/gmsh")
endif()

include(FindPackageHandleStandardArgs)

# 如果找到所有需要的变量，并且版本匹配，则将Gmsh_FOUND变量设置为TRUE
find_package_handle_standard_args(Gmsh
	FOUND_VAR
		Gmsh_FOUND
	REQUIRED_VARS
		Gmsh_DIRS
		Gmsh_EXECUTABLE
	VERSION_VAR
		Gmsh_VERSION
)