# FindIntltool.cmake

#

# Searches for intltool and gettext. It aborts, if anything cannot be found.

# Requires GETTEXT_PO_DIR to be set to full path of the po/ directory.

#

# Output is:

#   INTLTOOL_UPDATE  - an intltool-update executable path, as found

#   INTLTOOL_EXTRACT  - an intltool-extract executable path, as found

#   INTLTOOL_MERGE  - an intltool-merge executable path, as found

#

# and anything from the FindGettext module.

#

# The below provided macros require GETTEXT_PACKAGE to be set.

#

# intltool_add_check_potfiles_target()

#    Adds a check-potfiles target, which verifies that all files with translations

#    are added in the POTFILES.in file inside GETTEXT_PO_DIR. This macro can be called

#    only inside GETTEXT_PO_DIR.

#

# intltool_add_pot_file_target()

#    Creates a new target pot-file, which generates ${GETTEXT_PACKAGE}.pot file into

#    the CMAKE_CURERNT_BINARY_DIR. This target is not part of ALL.

#    This can be called only inside GETTEXT_PO_DIR.

#

# intltool_process_po_files()

#    Processes all files in the GETTEXT_PO_DIR and generates .gmo files for them

#    in CMAKE_CURRENT_BINARY_DIR. These are added into a new target gmo-files.

#    It also installs them into proper location under LOCALE_INSTALL_DIR.

#    This can be called only inside GETTEXT_PO_DIR.

#

# intltool_setup_po_dir()

#    Shortcut to setup intltool's po/ directory by adding all custom targets

#    and such. this can be called only inside GETTEXT_PO_DIR.

#

# intltool_merge(_in_filename _out_filename ...args)

#    Adds rule to call intltool-merge. The args are optional arguments.

#    This can be called in any folder, only the GETTEXT_PO_DIR should

#    be properly set, otherwise the call will fail.

#

# add_appdata_file(_infilename _outfilename)

#    A shortcut to call intltool-merge() for an appdata file and install it

#    to ${SHARE_INSTALL_PREFIX}/metainfo

include(FindGettext)

if(NOT GETTEXT_FOUND)

	message(FATAL_ERROR "gettext not found, please install at least 0.18.3 version")

endif(NOT GETTEXT_FOUND)

if(NOT GETTEXT_FOUND)

	message(FATAL_ERROR "gettext not found, please install at least 0.18.3 version")

endif(NOT GETTEXT_FOUND)

if(GETTEXT_VERSION_STRING VERSION_LESS "0.18.3")

	message(FATAL_ERROR "gettext version 0.18.3+ required, but version '${GETTEXT_VERSION_STRING}' found instead. Please update your gettext")

endif(GETTEXT_VERSION_STRING VERSION_LESS "0.18.3")

find_program(XGETTEXT xgettext)

if(NOT XGETTEXT)

	message(FATAL_ERROR "xgettext executable not found. Please install or update your gettext to at least 0.18.3 version")

endif(NOT XGETTEXT)

find_program(INTLTOOL_UPDATE intltool-update)

if(NOT INTLTOOL_UPDATE)

	message(FATAL_ERROR "intltool-update not found. Please install it (usually part of an 'intltool' package)")

endif(NOT INTLTOOL_UPDATE)

find_program(INTLTOOL_EXTRACT intltool-extract)

if(NOT INTLTOOL_EXTRACT)

	message(FATAL_ERROR "intltool-extract not found. Please install it (usually part of an 'intltool' package)")

endif(NOT INTLTOOL_EXTRACT)

find_program(INTLTOOL_MERGE intltool-merge)

if(NOT INTLTOOL_MERGE)

	message(FATAL_ERROR "intltool-merge not found. Please install it (usually part of an 'intltool' package)")

endif(NOT INTLTOOL_MERGE)

macro(intltool_add_check_potfiles_target)

	if(NOT CMAKE_CURRENT_SOURCE_DIR STREQUAL GETTEXT_PO_DIR)

		message(FATAL_ERROR "intltool_add_pot_file_target() can be called only inside GETTEXT_PO_DIR ('${GETTEXT_PO_DIR}'), but it is called inside '${CMAKE_CURRENT_SOURCE_DIR}' instead")

	endif(NOT CMAKE_CURRENT_SOURCE_DIR STREQUAL GETTEXT_PO_DIR)

	add_custom_target(check-potfiles

		COMMAND ${INTLTOOL_UPDATE} -m

		WORKING_DIRECTORY ${GETTEXT_PO_DIR}

	)

endmacro(intltool_add_check_potfiles_target)

macro(intltool_add_pot_file_target)

	if(NOT CMAKE_CURRENT_SOURCE_DIR STREQUAL GETTEXT_PO_DIR)

		message(FATAL_ERROR "intltool_add_pot_file_target() can be called only inside GETTEXT_PO_DIR ('${GETTEXT_PO_DIR}'), but it is called inside '${CMAKE_CURRENT_SOURCE_DIR}' instead")

	endif(NOT CMAKE_CURRENT_SOURCE_DIR STREQUAL GETTEXT_PO_DIR)

	add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${GETTEXT_PACKAGE}.pot

		COMMAND ${CMAKE_COMMAND} -E env INTLTOOL_EXTRACT="${INTLTOOL_EXTRACT}" XGETTEXT="${XGETTEXT}" srcdir=${CMAKE_CURRENT_SOURCE_DIR} ${INTLTOOL_UPDATE} --gettext-package ${GETTEXT_PACKAGE} --pot

	)

	add_custom_target(pot-file

		DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/${GETTEXT_PACKAGE}.pot

	)

endmacro(intltool_add_pot_file_target)

macro(intltool_process_po_files)

	if(NOT CMAKE_CURRENT_SOURCE_DIR STREQUAL GETTEXT_PO_DIR)

		message(FATAL_ERROR "intltool_process_po_files() can be called only inside GETTEXT_PO_DIR ('${GETTEXT_PO_DIR}'), but it is called inside '${CMAKE_CURRENT_SOURCE_DIR}' instead")

	endif(NOT CMAKE_CURRENT_SOURCE_DIR STREQUAL GETTEXT_PO_DIR)

	file(GLOB po_files ${GETTEXT_PO_DIR}/*.po)

	set(LINGUAS)

	set(LINGUAS_GMO)

	foreach(file IN LISTS po_files)

		get_filename_component(lang ${file} NAME_WE)

		list(APPEND LINGUAS ${lang})

		list(APPEND LINGUAS_GMO ${lang}.gmo)

		add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${lang}.gmo

			COMMAND ${GETTEXT_MSGFMT_EXECUTABLE} -o ${CMAKE_CURRENT_BINARY_DIR}/${lang}.gmo ${CMAKE_CURRENT_SOURCE_DIR}/${lang}.po

			DEPENDS ${lang}.po

		)

		install(FILES ${CMAKE_CURRENT_BINARY_DIR}/${lang}.gmo

			DESTINATION ${LOCALE_INSTALL_DIR}/${lang}/LC_MESSAGES/

			RENAME ${GETTEXT_PACKAGE}.mo

		)

		if(EXISTS ${CMAKE_CURRENT_BINARY_DIR}/${lang}.gmo.m)

			install(FILES ${CMAKE_CURRENT_BINARY_DIR}/${lang}.gmo.m

				DESTINATION ${LOCALE_INSTALL_DIR}/${lang}/LC_MESSAGES/

				RENAME ${GETTEXT_PACKAGE}.mo.m

			)

		endif(EXISTS ${CMAKE_CURRENT_BINARY_DIR}/${lang}.gmo.m)

	endforeach(file)

	add_custom_target(gmo-files ALL

		DEPENDS ${LINGUAS_GMO}

	)

endmacro(intltool_process_po_files)

macro(intltool_setup_po_dir)

	if(NOT CMAKE_CURRENT_SOURCE_DIR STREQUAL GETTEXT_PO_DIR)

		message(FATAL_ERROR "intltool_setup_po_dir() can be called only inside GETTEXT_PO_DIR ('${GETTEXT_PO_DIR}'), but it is called inside '${CMAKE_CURRENT_SOURCE_DIR}' instead")

	endif(NOT CMAKE_CURRENT_SOURCE_DIR STREQUAL GETTEXT_PO_DIR)

	intltool_add_check_potfiles_target()

	intltool_add_pot_file_target()

	intltool_process_po_files()

endmacro(intltool_setup_po_dir)

macro(intltool_merge _in_filename _out_filename)

	set(_in ${_in_filename})

	set(_out ${_out_filename})

	get_filename_component(_path ${_in} DIRECTORY)

	if(_path STREQUAL "")

		set(_in ${CMAKE_CURRENT_SOURCE_DIR}/${_in})

	endif(_path STREQUAL "")

	get_filename_component(_path ${_out} DIRECTORY)

	if(_path STREQUAL "")

		set(_out ${CMAKE_CURRENT_BINARY_DIR}/${_out})

	endif(_path STREQUAL "")

	set(_has_no_translations OFF)

	set(_args)

	foreach(_arg ${ARGN})

		list(APPEND _args "${_arg}")

		if(_arg STREQUAL "--no-translations")

			set(_has_no_translations ON)

		endif(_arg STREQUAL "--no-translations")

	endforeach(_arg)

	if(_has_no_translations)

		add_custom_command(OUTPUT ${_out}

			COMMAND ${INTLTOOL_MERGE} ${_args} --quiet "${_in}" "${_out}"

			DEPENDS ${_in}

		)

	else(_has_no_translations)

		add_custom_command(OUTPUT ${_out}

			COMMAND ${INTLTOOL_MERGE} ${_args} --quiet --cache="${CMAKE_BINARY_DIR}/po/.intltool-merge-cache" "${GETTEXT_PO_DIR}" "${_in}" "${_out}"

			DEPENDS ${_in}

		)

	endif(_has_no_translations)

endmacro(intltool_merge)

macro(add_appdata_file _infilename _outfilename)

	if(NOT TARGET appdata-files)

		add_custom_target(appdata-files ALL)

	endif(NOT TARGET appdata-files)

	set(_out ${_outfilename})

	get_filename_component(_outtarget ${_out} NAME)

	get_filename_component(_path ${_out} DIRECTORY)

	if(_path STREQUAL "")

		set(_out ${CMAKE_CURRENT_BINARY_DIR}/${_out})

	endif(_path STREQUAL "")

	intltool_merge(${_infilename} ${_out} --xml-style --utf8)

	add_custom_target(appdata-${_outtarget}

		DEPENDS ${_out}

	)

	add_dependencies(appdata-files appdata-${_outtarget})

	install(FILES ${_out}

		DESTINATION ${SHARE_INSTALL_PREFIX}/metainfo

	)

endmacro(add_appdata_file)