[chrome-gnome-shell/feature/gettext] gettext: added cmake target to build all translation stuff

[Yuri Konotopov <ykonotopov src gnome org>]

commit 5c1835d588c481aa1783019fc698562d4779f75c
Author: Yuri Konotopov <ykonotopov gmail com>
Date:   Thu May 5 12:42:57 2016 +0300

    gettext: added cmake target to build all translation stuff

 CMakeLists.txt |   58 ++++++++++++++++++++++++++++++++++++++++++++++---------
 1 files changed, 48 insertions(+), 10 deletions(-)
---
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 76b6325..0debcd0 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -21,6 +21,7 @@ option(BUILD_EXTENSION                "Build extension zip package"   TRUE)
 option(BUILD_CONNECTOR         "Build native messaging host"   TRUE)
 option(BUILD_SOURCE_PACKAGE    "Build source package"          FALSE)
 option(BUILD_DEB               "Build debian package"          FALSE)
+option(BUILD_MESSAGES          "Update translation strings"    FALSE)
 
 # Default extensions id for Chrome web store
 if(NOT DEFINED(EXTENSION_ID))
@@ -52,9 +53,9 @@ endmacro(find_program_ex)
 include(GNUInstallDirs)
 
 # Options validating
-if(NOT BUILD_EXTENSION AND NOT BUILD_CONNECTOR)
+if(NOT BUILD_EXTENSION AND NOT BUILD_CONNECTOR AND NOT BUILD_MESSAGES)
        message(FATAL_ERROR "No build options selected")
-endif(NOT BUILD_EXTENSION AND NOT BUILD_CONNECTOR)
+endif(NOT BUILD_EXTENSION AND NOT BUILD_CONNECTOR AND NOT BUILD_MESSAGES)
 
 if(BUILD_DEB AND NOT BUILD_SOURCE_PACKAGE)
        message(STATUS "Building of debian package enabled. Turning on building source package.")
@@ -65,6 +66,10 @@ if(BUILD_SOURCE_PACKAGE AND NOT EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/.git/)
        message(FATAL_ERROR "Unable to build source package outside of git repository.")
 endif(BUILD_SOURCE_PACKAGE AND NOT EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/.git/)
 
+if(BUILD_MESSAGES AND NOT DEFINED GETTEXT_REPORT_EMAIL)
+       message(FATAL_ERROR "GETTEXT_REPORT_EMAIL must be specified to generate po template.")
+endif(BUILD_MESSAGES AND NOT DEFINED GETTEXT_REPORT_EMAIL)
+
 # Options handling
 if(BUILD_EXTENSION)
        find_program_ex(7z FATAL_ERROR)
@@ -133,13 +138,46 @@ if(BUILD_SOURCE_PACKAGE)
        endif(BUILD_DEB)
 endif(BUILD_SOURCE_PACKAGE)
 
-if(DEFINED GETTEXT_REPORT_EMAIL)
+if(BUILD_MESSAGES)
+       find_package(Gettext)
+       if(NOT GETTEXT_FOUND)
+               message(FATAL_ERROR "Gettext not found")
+       endif(NOT GETTEXT_FOUND)
+
        add_custom_target(generate-pot
                COMMAND ${CMAKE_CURRENT_SOURCE_DIR}/contrib/chrome-messages2po.py
-                               --email ${GETTEXT_REPORT_EMAIL}
-                               --reference-lang en
-                               --write-pot
-                               ${CMAKE_CURRENT_SOURCE_DIR}/contrib/chrome-web-store/
-                               ${CMAKE_CURRENT_SOURCE_DIR}/extension/_locales/
-                               ${CMAKE_CURRENT_SOURCE_DIR}/po/)
-endif(DEFINED GETTEXT_REPORT_EMAIL)
+                       --email ${GETTEXT_REPORT_EMAIL}
+                       --reference-lang en
+                       --write-pot
+                       ${CMAKE_CURRENT_SOURCE_DIR}/contrib/chrome-web-store/
+                       ${CMAKE_CURRENT_SOURCE_DIR}/extension/_locales/
+                       ${CMAKE_CURRENT_SOURCE_DIR}/po/)
+
+       add_custom_target(update-po
+               DEPENDS generate-pot)
+
+       file(GLOB PO_FILES
+               LIST_DIRECTORIES false
+               RELATIVE ${CMAKE_CURRENT_SOURCE_DIR}/po/
+               ${CMAKE_CURRENT_SOURCE_DIR}/po/*.po)
+
+       foreach(PO ${PO_FILES})
+               add_custom_command(TARGET update-po
+                       COMMENT "Updating ${PO}"
+                       WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/po
+                       COMMAND ${GETTEXT_MSGMERGE_EXECUTABLE} -q --update
+                               ${PO}
+                               ${CMAKE_CURRENT_SOURCE_DIR}/po/template.pot)
+       endforeach()
+
+       add_custom_command(TARGET update-po
+               COMMAND ${CMAKE_COMMAND} -E remove ${CMAKE_CURRENT_SOURCE_DIR}/po/*.po~)
+
+       add_custom_target(build-messages ALL
+               DEPENDS update-po
+               COMMAND ${CMAKE_CURRENT_SOURCE_DIR}/contrib/po2chrome-messages.py
+                       --reference-lang en
+                       ${CMAKE_CURRENT_SOURCE_DIR}/contrib/chrome-web-store/
+                       ${CMAKE_CURRENT_SOURCE_DIR}/extension/_locales/
+                       ${CMAKE_CURRENT_SOURCE_DIR}/po/)
+endif(BUILD_MESSAGES)