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# Usage: cmake -P Win32Depends.cmake

# Only CMake 3.1+ supports XZ archives and 7z doesn't also untar automatically
cmake_minimum_required (VERSION 3.1)

# Directories
set (working_dir ${CMAKE_CURRENT_BINARY_DIR}/win32-depends)
set (pkg_dir ${working_dir}/packages)
set (tools_dir ${working_dir}/tools)
set (sevenzip_executable ${tools_dir}/7za)
set (tmp_dir ${working_dir}/tmp)
file (MAKE_DIRECTORY ${working_dir})
file (MAKE_DIRECTORY ${pkg_dir})

# Cleanup
message (STATUS "Cleaning up...")
file (GLOB files ${working_dir}/*)
list (REMOVE_ITEM files ${pkg_dir})
if (files)
	file (REMOVE_RECURSE ${files})
endif (files)

# Packages
set (pkg_list "7za" "gtk" "gtkalt" "winlibs" "mingw_lua")

set (pkg_7za_root "http://sourceforge.net/projects/sevenzip/files")
set (pkg_7za_urls "${pkg_7za_root}/7-Zip/9.20/7za920.zip")
set (pkg_7za_md5 "2fac454a90ae96021f4ffc607d4c00f8")

set (pkg_gtk_root "http://ftp.gnome.org/pub/gnome/binaries/win32")
set (pkg_gtk_urls "${pkg_gtk_root}/dependencies/gettext-tools-0.17.zip")
set (pkg_gtk_md5 "09baff956ebd1c391c7f71e9bd768edd")

set (pkg_gtkalt_root "http://win32builder.gnome.org")
set (pkg_gtkalt_urls "${pkg_gtkalt_root}/gtk+-bundle_3.8.2-20131001_win32.zip")
set (pkg_gtkalt_md5 "3f9b159207edf44937f209b4a5e6bb63")

# Doesn't work, no gtk+-3.0.pc file present
#set (pkg_gtkalt_urls "${pkg_gtkalt_root}/gtk+-bundle_3.10.4-20131202_win32.zip")
#set (pkg_gtkalt_md5 "520bed70943974efdaeea2a1dbe48f84")
# Too old
#set (pkg_gtkalt_urls "${pkg_gtkalt_root}/gtk+-bundle_3.6.4-20130921_win32.zip")
#set (pkg_gtkalt_md5 "9bcb87d917982a6e52a69141ade8bd56")

set (pkg_winlibs_root "http://sourceforge.net/projects/winlibs/files")
set (pkg_winlibs_urls "${pkg_winlibs_root}/GTK+/libjson-glib-1.0-1-mingw32.7z")
set (pkg_winlibs_md5 "f06e42c5998dae5fb6245fecc96a403e")

set (pkg_mingw_lua_root "http://sourceforge.net/projects/mingw/files/MinGW/Extension")
set (pkg_mingw_lua_urls
	"${pkg_mingw_lua_root}/lua/lua-5.2.0-1/lua-5.2.0-1-mingw32-dll-52.tar.xz"
	"${pkg_mingw_lua_root}/lua/lua-5.2.0-1/lua-5.2.0-1-mingw32-dev.tar.xz")
set (pkg_mingw_lua_md5
	"150b27cab05b78ba40bbd7225630c00d"
	"6abe77c1e1a783075fe73c53b7c235fb")

# Stage 1: fetch missing packages
foreach (pkg_set ${pkg_list})
	set (pkg_md5 ${pkg_${pkg_set}_md5})

	foreach (url ${pkg_${pkg_set}_urls})
		get_filename_component (basename ${url} NAME)
		set (filename ${pkg_dir}/${basename})

		if (NOT pkg_md5)
			message (WARNING "MD5 checksum missing for ${basename}")
			set (pkg_md5_sum)
			set (pkg_md5_param)
		else (NOT pkg_md5)
			list (GET pkg_md5 0 pkg_md5_sum)
			list (REMOVE_AT pkg_md5 0)
			set (pkg_md5_param EXPECTED_MD5 ${pkg_md5_sum})
		endif (NOT pkg_md5)

		if (NOT EXISTS ${filename})
			message (STATUS "Downloading ${url}...")
			file (DOWNLOAD ${url} ${filename} STATUS status ${pkg_md5_param})

			list (GET status 0 status_errno)
			list (GET status 1 status_msg)
			if (status_errno)
				file (REMOVE ${filename})
				message (FATAL_ERROR "Download failed: ${status_msg}")
			endif (status_errno)
		elseif (pkg_md5_sum)
			execute_process (COMMAND ${CMAKE_COMMAND} -E md5sum ${filename}
				OUTPUT_VARIABLE output)
			if (NOT output MATCHES "^${pkg_md5_sum}")
				message (FATAL_ERROR "MD5 mismatch for ${basename}")
			endif (NOT output MATCHES "^${pkg_md5_sum}")
		endif (NOT EXISTS ${filename})
	endforeach (url)
endforeach (pkg_set)

if (NOT WIN32)
	unset (sevenzip_executable)
	find_program (sevenzip_executable 7za)
	if (NOT sevenzip_executable)
		message (FATAL_ERROR "Could not find 7za (part of p7zip)")
	endif (NOT sevenzip_executable)
endif (NOT WIN32)

# Stage 2: setup 7za first
file (MAKE_DIRECTORY ${tmp_dir})
foreach (url ${pkg_7za_urls})
	get_filename_component (filename ${url} NAME)
	message (STATUS "Extracting ${filename}...")

	set (filename ${pkg_dir}/${filename})
	execute_process (COMMAND ${CMAKE_COMMAND} -E tar xf ${filename}
		WORKING_DIRECTORY ${tmp_dir}
		RESULT_VARIABLE status)
	if (status)
		message (FATAL_ERROR "Extraction failed: ${status}")
	endif (status)
endforeach (url)

file (MAKE_DIRECTORY ${tools_dir})
file (COPY ${tmp_dir}/7za.exe DESTINATION ${tools_dir})
file (REMOVE_RECURSE ${tmp_dir})
list (REMOVE_ITEM pkg_list "7za")

# Stage 3: extract the rest of packages
foreach (pkg_set ${pkg_list})
	foreach (url ${pkg_${pkg_set}_urls})
		get_filename_component (filename ${url} NAME)
		message (STATUS "Extracting ${filename}...")

		if (filename MATCHES "\\.7z$")
			set (extract_command ${sevenzip_executable} x)
			set (quiet OUTPUT_QUIET)
		else (filename MATCHES "\\.7z$")
			set (extract_command ${CMAKE_COMMAND} -E tar xf)
			set (quiet)
		endif (filename MATCHES "\\.7z$")

		set (filename ${pkg_dir}/${filename})
		if (pkg_${pkg_set}_strip)
			file (MAKE_DIRECTORY ${tmp_dir})
			execute_process (COMMAND ${extract_command} ${filename}
				WORKING_DIRECTORY ${tmp_dir}
				RESULT_VARIABLE status ${quiet})
			file (COPY ${tmp_dir}/${pkg_${pkg_set}_strip}/
				DESTINATION ${working_dir})
			file (REMOVE_RECURSE ${tmp_dir})
		else (pkg_${pkg_set}_strip)
			execute_process (COMMAND ${extract_command} ${filename}
				WORKING_DIRECTORY ${working_dir}
				RESULT_VARIABLE status ${quiet})
		endif (pkg_${pkg_set}_strip)

		if (status)
			message (FATAL_ERROR "Extraction failed: ${status}")
		endif (status)
	endforeach (url)
endforeach (pkg_set)

# Stage 4: final touches
# We have to fix the prefix path as it is completely wrong everywhere
file (GLOB files ${working_dir}/lib/pkgconfig/*.pc)
foreach (file ${files})
	message (STATUS "Fixing ${file}...")
	file (READ ${file} file_content)
	string (REGEX REPLACE "prefix=[^\r\n]*(.*)" "prefix=${working_dir}\\1"
		file_content_fixed "${file_content}")
	file (WRITE ${file} "${file_content_fixed}")
endforeach (file)