From 7def24826c298df77e34fd17bb72c570a22b04bd Mon Sep 17 00:00:00 2001
From: Julian Andres Klode <jak@debian.org>
Date: Sat, 6 Aug 2016 21:11:06 +0200
Subject: CMake: Add support for building and installing .mo files

Introduce support for building translation domain-specific
templates, merging them with the translations, and building
a language-specific .mo file.

The invocation of xgettext is done in the project source
directory, not in the current source directory, and all paths
are made relative to the project root, in order to have clean
templates.

This only supports the C++ source code for now, it unfortunately
does not handle the shell scripts of deselect yet.
---
 CMake/Translations.cmake | 53 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 53 insertions(+)
 create mode 100644 CMake/Translations.cmake

(limited to 'CMake')

diff --git a/CMake/Translations.cmake b/CMake/Translations.cmake
new file mode 100644
index 000000000..2a1e03d4c
--- /dev/null
+++ b/CMake/Translations.cmake
@@ -0,0 +1,53 @@
+# translations.cmake - Translations using APT's translation system.
+# Copyright (C) 2009, 2016 Julian Andres Klode <jak@debian.org>
+
+function(apt_add_translation_domain domain)
+    set(targets ${ARGN})
+    # Build the list of source files of the target
+    set(files "")
+    foreach(target ${targets})
+        get_target_property(source_dir ${target} SOURCE_DIR)
+        get_target_property(sources ${target} SOURCES)
+        foreach(source ${sources})
+            string(SUBSTRING ${source} 0 1 init_char)
+            string(COMPARE EQUAL ${init_char} "/" is_absolute)
+            if (${is_absolute})
+                set(file "${source}")
+            else()
+                set(file "${source_dir}/${source}")
+            endif()
+            file(RELATIVE_PATH relfile ${PROJECT_SOURCE_DIR} ${file})
+            set(files ${files} ${relfile})
+        endforeach()
+
+        target_compile_definitions(${target} PRIVATE -DAPT_DOMAIN="${domain}")
+    endforeach()
+
+    # Create the template for this specific sub-domain
+    add_custom_command (OUTPUT ${PROJECT_BINARY_DIR}/${domain}.pot
+        COMMAND xgettext --add-comments --foreign -k_ -kN_
+                         -o ${PROJECT_BINARY_DIR}/${domain}.pot ${files}
+        WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
+    )
+
+    # Build .mo files
+    file(GLOB translations "${PROJECT_SOURCE_DIR}/po/*.po")
+    list(SORT translations)
+    foreach(file ${translations})
+        get_filename_component(langcode ${file} NAME_WE)
+        set(outdir ${PROJECT_BINARY_DIR}/locale/${langcode}/LC_MESSAGES)
+        file(MAKE_DIRECTORY ${outdir})
+        # Command to merge and compile the messages
+        add_custom_command(OUTPUT ${outdir}/${domain}.mo
+            COMMAND msgmerge -qo - ${file} ${PROJECT_BINARY_DIR}/${domain}.pot |
+                    msgfmt -o ${outdir}/${domain}.mo -
+            DEPENDS ${file} ${PROJECT_BINARY_DIR}/${domain}.pot
+        )
+
+        set(mofiles ${mofiles} ${outdir}/${domain}.mo)
+        install(FILES ${outdir}/${domain}.mo
+                DESTINATION "${CMAKE_INSTALL_LOCALEDIR}/${langcode}/LC_MESSAGES")
+    endforeach(file ${translations})
+
+    add_custom_target(nls-${domain} ALL DEPENDS ${mofiles})
+endfunction()
-- 
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