From 63972bb0d7b1c2bc55844b6ab8718995ef7c84fb Mon Sep 17 00:00:00 2001
From: Hennadii Stepanov <32963518+hebasto@users.noreply.github.com>
Date: Tue, 18 Jun 2024 07:27:04 +0100
Subject: [PATCH] cmake: Implement `translate` target

---
 src/qt/CMakeLists.txt | 57 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 57 insertions(+)

diff --git a/src/qt/CMakeLists.txt b/src/qt/CMakeLists.txt
index 248d0e89508b0..6f8a95d305333 100644
--- a/src/qt/CMakeLists.txt
+++ b/src/qt/CMakeLists.txt
@@ -297,3 +297,60 @@ install(TARGETS ${installable_targets}
 if(BUILD_GUI_TESTS)
   add_subdirectory(test)
 endif()
+
+
+# Gets sources to be parsed to gather translatable strings.
+function(get_translatable_sources var)
+  set(result)
+  set(targets)
+  foreach(dir IN ITEMS ${ARGN})
+    get_directory_property(dir_targets DIRECTORY ${PROJECT_SOURCE_DIR}/${dir} BUILDSYSTEM_TARGETS)
+    list(APPEND targets ${dir_targets})
+  endforeach()
+  foreach(target IN LISTS targets)
+    get_target_property(target_sources ${target} SOURCES)
+    if(target_sources)
+      foreach(source IN LISTS target_sources)
+        # Get an expression from the generator expression, if any.
+        if(source MATCHES ":([^>]+)>$")
+          set(source ${CMAKE_MATCH_1})
+        endif()
+        cmake_path(GET source EXTENSION LAST_ONLY ext)
+        if(ext STREQUAL ".qrc")
+          continue()
+        endif()
+        if(NOT IS_ABSOLUTE source)
+          get_target_property(target_source_dir ${target} SOURCE_DIR)
+          cmake_path(APPEND target_source_dir ${source} OUTPUT_VARIABLE source)
+        endif()
+        list(APPEND result ${source})
+      endforeach()
+    endif()
+  endforeach()
+  set(${var} ${result} PARENT_SCOPE)
+endfunction()
+
+find_program(XGETTEXT_EXECUTABLE xgettext)
+find_program(SED_EXECUTABLE sed)
+if(NOT XGETTEXT_EXECUTABLE)
+  add_custom_target(translate
+    COMMAND ${CMAKE_COMMAND} -E echo "Error: GNU gettext-tools not found"
+  )
+elseif(NOT SED_EXECUTABLE)
+  add_custom_target(translate
+    COMMAND ${CMAKE_COMMAND} -E echo "Error: GNU sed not found"
+  )
+else()
+  get_translatable_sources(translatable_sources src src/qt src/util src/wallet)
+  get_translatable_sources(qt_translatable_sources src/qt)
+  file(GLOB ui_files ${CMAKE_CURRENT_SOURCE_DIR}/forms/*.ui)
+  add_custom_target(translate
+    COMMAND ${CMAKE_COMMAND} -E env XGETTEXT=${XGETTEXT_EXECUTABLE} COPYRIGHT_HOLDERS=${COPYRIGHT_HOLDERS} ${Python3_EXECUTABLE} ${PROJECT_SOURCE_DIR}/share/qt/extract_strings_qt.py ${translatable_sources}
+    COMMAND Qt5::lupdate -no-obsolete -I ${PROJECT_SOURCE_DIR}/src -locations relative ${CMAKE_CURRENT_SOURCE_DIR}/bitcoinstrings.cpp ${ui_files} ${qt_translatable_sources} -ts ${CMAKE_CURRENT_SOURCE_DIR}/locale/bitcoin_en.ts
+    COMMAND Qt5::lconvert -drop-translations -o ${CMAKE_CURRENT_SOURCE_DIR}/locale/bitcoin_en.xlf -i ${CMAKE_CURRENT_SOURCE_DIR}/locale/bitcoin_en.ts
+    COMMAND ${SED_EXECUTABLE} -i.old -e "s|source-language=\"en\" target-language=\"en\"|source-language=\"en\"|" -e "/<target xml:space=\"preserve\"><\\/target>/d" ${CMAKE_CURRENT_SOURCE_DIR}/locale/bitcoin_en.xlf
+    COMMAND ${CMAKE_COMMAND} -E rm ${CMAKE_CURRENT_SOURCE_DIR}/locale/bitcoin_en.xlf.old
+    WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}/src
+    VERBATIM
+  )
+endif()