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CMake/Modules/FindGettext.cmake
Roger Leigh c5e797dbb8 FindIntl: New module to find Gettext libintl 
Add support for Sun/Uniforum/GNU gettext libintl.  This belongs in CMake
rather than upstream because:

* There are multiple upstreams (Sun, GNU).

* It may or may not be in the glibc C library depending
  upon the platform and build options used.

Although we already have a FindGettext module, that is for the tools.
This module is for the library, and is independent because it's
perfectly OK to use libintl without the gettext tools (and vice versa),
and they might not all be found.  Add cross references between the two
modules in notes to make the relationship clearer.
2014-11-11 13:02:16 -05:00

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#.rst:
# FindGettext
# -----------
#
# Find GNU gettext tools
#
# This module looks for the GNU gettext tools. This module defines the
# following values:
#
# ::
#
# GETTEXT_MSGMERGE_EXECUTABLE: the full path to the msgmerge tool.
# GETTEXT_MSGFMT_EXECUTABLE: the full path to the msgfmt tool.
# GETTEXT_FOUND: True if gettext has been found.
# GETTEXT_VERSION_STRING: the version of gettext found (since CMake 2.8.8)
#
#
#
# Additionally it provides the following macros:
#
# GETTEXT_CREATE_TRANSLATIONS ( outputFile [ALL] file1 ... fileN )
#
# ::
#
# This will create a target "translations" which will convert the
# given input po files into the binary output mo file. If the
# ALL option is used, the translations will also be created when
# building the default target.
#
# GETTEXT_PROCESS_POT_FILE( <potfile> [ALL] [INSTALL_DESTINATION <destdir>]
# LANGUAGES <lang1> <lang2> ... )
#
# ::
#
# Process the given pot file to mo files.
# If INSTALL_DESTINATION is given then automatically install rules will
# be created, the language subdirectory will be taken into account
# (by default use share/locale/).
# If ALL is specified, the pot file is processed when building the all traget.
# It creates a custom target "potfile".
#
# GETTEXT_PROCESS_PO_FILES( <lang> [ALL] [INSTALL_DESTINATION <dir>]
# PO_FILES <po1> <po2> ... )
#
# ::
#
# Process the given po files to mo files for the given language.
# If INSTALL_DESTINATION is given then automatically install rules will
# be created, the language subdirectory will be taken into account
# (by default use share/locale/).
# If ALL is specified, the po files are processed when building the all traget.
# It creates a custom target "pofiles".
#
# .. note::
# If you wish to use the Gettext library (libintl), use :module:`FindIntl`.
#=============================================================================
# Copyright 2007-2009 Kitware, Inc.
# Copyright 2007 Alexander Neundorf <neundorf@kde.org>
#
# Distributed under the OSI-approved BSD License (the "License");
# see accompanying file Copyright.txt for details.
#
# This software is distributed WITHOUT ANY WARRANTY; without even the
# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
# See the License for more information.
#=============================================================================
# (To distribute this file outside of CMake, substitute the full
# License text for the above reference.)
find_program(GETTEXT_MSGMERGE_EXECUTABLE msgmerge)
find_program(GETTEXT_MSGFMT_EXECUTABLE msgfmt)
if(GETTEXT_MSGMERGE_EXECUTABLE)
execute_process(COMMAND ${GETTEXT_MSGMERGE_EXECUTABLE} --version
OUTPUT_VARIABLE gettext_version
ERROR_QUIET
OUTPUT_STRIP_TRAILING_WHITESPACE)
if (gettext_version MATCHES "^msgmerge \\([^\\)]*\\) ([0-9\\.]+[^ \n]*)")
set(GETTEXT_VERSION_STRING "${CMAKE_MATCH_1}")
endif()
unset(gettext_version)
endif()
include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
FIND_PACKAGE_HANDLE_STANDARD_ARGS(Gettext
REQUIRED_VARS GETTEXT_MSGMERGE_EXECUTABLE GETTEXT_MSGFMT_EXECUTABLE
VERSION_VAR GETTEXT_VERSION_STRING)
include(${CMAKE_CURRENT_LIST_DIR}/CMakeParseArguments.cmake)
function(_GETTEXT_GET_UNIQUE_TARGET_NAME _name _unique_name)
set(propertyName "_GETTEXT_UNIQUE_COUNTER_${_name}")
get_property(currentCounter GLOBAL PROPERTY "${propertyName}")
if(NOT currentCounter)
set(currentCounter 1)
endif()
set(${_unique_name} "${_name}_${currentCounter}" PARENT_SCOPE)
math(EXPR currentCounter "${currentCounter} + 1")
set_property(GLOBAL PROPERTY ${propertyName} ${currentCounter} )
endfunction()
macro(GETTEXT_CREATE_TRANSLATIONS _potFile _firstPoFileArg)
# make it a real variable, so we can modify it here
set(_firstPoFile "${_firstPoFileArg}")
set(_gmoFiles)
get_filename_component(_potName ${_potFile} NAME)
string(REGEX REPLACE "^(.+)(\\.[^.]+)$" "\\1" _potBasename ${_potName})
get_filename_component(_absPotFile ${_potFile} ABSOLUTE)
set(_addToAll)
if(${_firstPoFile} STREQUAL "ALL")
set(_addToAll "ALL")
set(_firstPoFile)
endif()
foreach (_currentPoFile ${_firstPoFile} ${ARGN})
get_filename_component(_absFile ${_currentPoFile} ABSOLUTE)
get_filename_component(_abs_PATH ${_absFile} PATH)
get_filename_component(_lang ${_absFile} NAME_WE)
set(_gmoFile ${CMAKE_CURRENT_BINARY_DIR}/${_lang}.gmo)
add_custom_command(
OUTPUT ${_gmoFile}
COMMAND ${GETTEXT_MSGMERGE_EXECUTABLE} --quiet --update --backup=none -s ${_absFile} ${_absPotFile}
COMMAND ${GETTEXT_MSGFMT_EXECUTABLE} -o ${_gmoFile} ${_absFile}
DEPENDS ${_absPotFile} ${_absFile}
)
install(FILES ${_gmoFile} DESTINATION share/locale/${_lang}/LC_MESSAGES RENAME ${_potBasename}.mo)
set(_gmoFiles ${_gmoFiles} ${_gmoFile})
endforeach ()
if(NOT TARGET translations)
add_custom_target(translations)
endif()
_GETTEXT_GET_UNIQUE_TARGET_NAME(translations uniqueTargetName)
add_custom_target(${uniqueTargetName} ${_addToAll} DEPENDS ${_gmoFiles})
add_dependencies(translations ${uniqueTargetName})
endmacro()
function(GETTEXT_PROCESS_POT_FILE _potFile)
set(_gmoFiles)
set(_options ALL)
set(_oneValueArgs INSTALL_DESTINATION)
set(_multiValueArgs LANGUAGES)
CMAKE_PARSE_ARGUMENTS(_parsedArguments "${_options}" "${_oneValueArgs}" "${_multiValueArgs}" ${ARGN})
get_filename_component(_potName ${_potFile} NAME)
string(REGEX REPLACE "^(.+)(\\.[^.]+)$" "\\1" _potBasename ${_potName})
get_filename_component(_absPotFile ${_potFile} ABSOLUTE)
foreach (_lang ${_parsedArguments_LANGUAGES})
set(_poFile "${CMAKE_CURRENT_BINARY_DIR}/${_lang}.po")
set(_gmoFile "${CMAKE_CURRENT_BINARY_DIR}/${_lang}.gmo")
add_custom_command(
OUTPUT "${_poFile}"
COMMAND ${GETTEXT_MSGMERGE_EXECUTABLE} --quiet --update --backup=none -s ${_poFile} ${_absPotFile}
DEPENDS ${_absPotFile}
)
add_custom_command(
OUTPUT "${_gmoFile}"
COMMAND ${GETTEXT_MSGFMT_EXECUTABLE} -o ${_gmoFile} ${_poFile}
DEPENDS ${_absPotFile} ${_poFile}
)
if(_parsedArguments_INSTALL_DESTINATION)
install(FILES ${_gmoFile} DESTINATION ${_parsedArguments_INSTALL_DESTINATION}/${_lang}/LC_MESSAGES RENAME ${_potBasename}.mo)
endif()
list(APPEND _gmoFiles ${_gmoFile})
endforeach ()
if(NOT TARGET potfiles)
add_custom_target(potfiles)
endif()
_GETTEXT_GET_UNIQUE_TARGET_NAME( potfiles uniqueTargetName)
if(_parsedArguments_ALL)
add_custom_target(${uniqueTargetName} ALL DEPENDS ${_gmoFiles})
else()
add_custom_target(${uniqueTargetName} DEPENDS ${_gmoFiles})
endif()
add_dependencies(potfiles ${uniqueTargetName})
endfunction()
function(GETTEXT_PROCESS_PO_FILES _lang)
set(_options ALL)
set(_oneValueArgs INSTALL_DESTINATION)
set(_multiValueArgs PO_FILES)
set(_gmoFiles)
CMAKE_PARSE_ARGUMENTS(_parsedArguments "${_options}" "${_oneValueArgs}" "${_multiValueArgs}" ${ARGN})
foreach(_current_PO_FILE ${_parsedArguments_PO_FILES})
get_filename_component(_name ${_current_PO_FILE} NAME)
string(REGEX REPLACE "^(.+)(\\.[^.]+)$" "\\1" _basename ${_name})
set(_gmoFile ${CMAKE_CURRENT_BINARY_DIR}/${_basename}.gmo)
add_custom_command(OUTPUT ${_gmoFile}
COMMAND ${GETTEXT_MSGFMT_EXECUTABLE} -o ${_gmoFile} ${_current_PO_FILE}
WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}"
DEPENDS ${_current_PO_FILE}
)
if(_parsedArguments_INSTALL_DESTINATION)
install(FILES ${CMAKE_CURRENT_BINARY_DIR}/${_basename}.gmo DESTINATION ${_parsedArguments_INSTALL_DESTINATION}/${_lang}/LC_MESSAGES/ RENAME ${_basename}.mo)
endif()
list(APPEND _gmoFiles ${_gmoFile})
endforeach()
if(NOT TARGET pofiles)
add_custom_target(pofiles)
endif()
_GETTEXT_GET_UNIQUE_TARGET_NAME( pofiles uniqueTargetName)
if(_parsedArguments_ALL)
add_custom_target(${uniqueTargetName} ALL DEPENDS ${_gmoFiles})
else()
add_custom_target(${uniqueTargetName} DEPENDS ${_gmoFiles})
endif()
add_dependencies(pofiles ${uniqueTargetName})
endfunction()
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