Handle situation where gettext 0.19.6 is not available

By default we require gettext 0.19.6 as this is needed to generate a translated version of gnucash.desktop and gnucash.appdata.xml.
However this version is not available on some platforms (most notably our own ubuntu 14.04LTS travis instance).
By setting ALLOW_OLD_GETTEXT=ON, the build configuration falls back to generating untranslated versions of said files instead.

CMakeLists.txt

@@ -66,6 +66,7 @@ OPTION (DISABLE_NLS "do not use Native Language Support" OFF)
 OPTION (DISABLE_DEPRECATED_GLIB "don't use deprecated glib functions" OFF)
 OPTION (DISABLE_DEPRECATED_GTK "don't use deprecated gtk, gdk or gdk-pixbuf functions" OFF)
 OPTION (DISABLE_DEPRECATED_GNOME "don't use deprecated gnome functions" OFF)
+OPTION (ALLOW_OLD_GETTEXT "allow to configure build with a gettext version older than 0.19.6. Some files will not be translated!" OFF)
 # ############################################################
 
 # These are also settable from the command line in a similar way.
@@ -248,15 +249,27 @@ ENDIF()
 
 
 FIND_PROGRAM(GLIB_COMPILE_SCHEMAS glib-compile-schemas HINTS ${CMAKE_PREFIX_PATH}/gnome/bin)
-FIND_PROGRAM(MSGFMT msgfmt)
-
 IF (NOT GLIB_COMPILE_SCHEMAS)
   MESSAGE(SEND_ERROR "Can't find glib-compile-schemas program. Please set GLIB_COMPILE_SCHEMAS.")
 ENDIF(NOT GLIB_COMPILE_SCHEMAS)
 
-IF (NOT MSGFMT)
-  MESSAGE(SEND_ERROR "Can't find msgfmt program. Please set MSGFMT.")
-ENDIF(NOT MSGFMT)
+if (ALLOW_OLD_GETTEXT)
+    find_package (Gettext REQUIRED)
+else (ALLOW_OLD_GETTEXT)
+    find_package (Gettext 0.19.6)
+    if (NOT GETTEXT_FOUND)
+        message (FATAL_ERROR "Note the build can be configured with an older version of gnucash by setting ALLOW_OLD_GETTEXT=ON but then some files will not be translated:
+        - gnucash.desktop (requires at least gettext 0.19)
+        - gnucash.appdata.xml (requires at least gettext 0.19.6)")
+    endif (NOT GETTEXT_FOUND)
+endif (ALLOW_OLD_GETTEXT)
+
+if (${GETTEXT_VERSION_STRING} VERSION_LESS 0.19)
+    message (WARNING "Got gettext version ${GETTEXT_VERSION_STRING}, however you need at least gettext version 0.19 in order to handle translation of the gnucash.desktop file. The build will be configured with an untranslated gnucash.desktop file.")
+endif ()
+if (${GETTEXT_VERSION_STRING} VERSION_LESS 0.19.6)
+    message (WARNING "Got gettext version ${GETTEXT_VERSION_STRING}, however you need at least gettext version 0.19.6 in order to handle translation of the gnucash.appdata file. The build will be configured with an untranslated gnucash.appdata file.")
+endif ()
 
 FIND_PATH (REGEX_INCLUDE_PATH NAMES regex.h
 		  PATHS /usr/include /opt/gnome/include)

gnucash/gnome/CMakeLists.txt

@@ -167,15 +167,24 @@ IF (${CMAKE_VERSION} VERSION_GREATER 3.1)
   SET(CMAKE_COMMAND_TMP ${CMAKE_COMMAND} -E env)
 ENDIF()
 
-ADD_CUSTOM_COMMAND(
-    OUTPUT gnucash.appdata.xml
-    COMMAND ${CMAKE_COMMAND_TMP}
-      LC_ALL=C
-      ${MSGFMT} --xml --template ${CMAKE_CURRENT_SOURCE_DIR}/gnucash.appdata.xml.in
+
+if (${GETTEXT_VERSION_STRING} VERSION_LESS 0.19.6)
+    # Gettext is too old to be able to merge an appdata file.
+    # Fall back to providing an unmerged (and hence untranslated) appdata file.
+    configure_file (${CMAKE_CURRENT_SOURCE_DIR}/gnucash.appdata.xml.in
+                    ${CMAKE_CURRENT_BINARY_DIR}/gnucash.appdata.xml COPYONLY)
+else()
+    add_custom_command (
+        OUTPUT gnucash.appdata.xml
+        COMMAND ${CMAKE_COMMAND_TMP}
+            LC_ALL=C
+            ${GETTEXT_MSGFMT_EXECUTABLE}
+                --xml --template ${CMAKE_CURRENT_SOURCE_DIR}/gnucash.appdata.xml.in
                 -d ${CMAKE_SOURCE_DIR}/po
                 -o gnucash.appdata.xml
-    DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/gnucash.appdata.xml.in
-)
+        DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/gnucash.appdata.xml.in
+    )
+endif()
 
 ADD_CUSTOM_TARGET(gnucash-appdata ALL DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/gnucash.appdata.xml)
 
@@ -185,15 +194,23 @@ INSTALL(FILES ${CMAKE_CURRENT_BINARY_DIR}/gnucash.appdata.xml DESTINATION  ${CMA
 
 configure_file(gnucash.desktop.in.in gnucash.desktop.in)
 
-ADD_CUSTOM_COMMAND(
-    OUTPUT gnucash.desktop
-    COMMAND ${CMAKE_COMMAND_TMP}
-      LC_ALL=C
-      ${MSGFMT} --desktop --template gnucash.desktop.in
+if (${GETTEXT_VERSION_STRING} VERSION_LESS 0.19)
+    # Gettext is too old to be able to merge a desktop file.
+    # Fall back to providing an unmerged (and hence untranslated) desktop file.
+    configure_file (${CMAKE_CURRENT_BINARY_DIR}/gnucash.desktop.in
+                    ${CMAKE_CURRENT_BINARY_DIR}/gnucash.desktop COPYONLY)
+else()
+    add_custom_command (
+        OUTPUT gnucash.desktop
+        COMMAND ${CMAKE_COMMAND_TMP}
+            LC_ALL=C
+            ${GETTEXT_MSGFMT_EXECUTABLE}
+                --desktop --template gnucash.desktop.in
                 -d ${CMAKE_SOURCE_DIR}/po
                 -o gnucash.desktop
-    DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/gnucash.desktop.in
-)
+        DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/gnucash.desktop.in
+    )
+endif()
 
 ADD_CUSTOM_TARGET(gnucash-desktop ALL DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/gnucash.desktop)
 

po/CMakeLists.txt

@@ -35,7 +35,9 @@ FOREACH(lingua ${ALL_LINGUAS})
   LIST(APPEND CATALOGS ${_OUTPUT_FILE})
   ADD_CUSTOM_COMMAND(
       OUTPUT ${_OUTPUT_FILE}
-      COMMAND ${CMAKE_COMMAND_TMP} ${MSGFMT} -o ${_OUTPUT_FILE} ${CMAKE_CURRENT_SOURCE_DIR}/${lingua}.po
+      COMMAND ${CMAKE_COMMAND_TMP}
+        ${GETTEXT_MSGFMT_EXECUTABLE}
+            -o ${_OUTPUT_FILE} ${CMAKE_CURRENT_SOURCE_DIR}/${lingua}.po
   )
   SET(_BUILD_FILE_DIR ${DATADIR_BUILD}/locale/${lingua}/LC_MESSAGES)
   MAKE_DIRECTORY(${_BUILD_FILE_DIR})

util/ci/arch-testscript

@@ -12,7 +12,9 @@
 mkdir ourpython_bin
 ln -s /usr/bin/python2 ourpython_bin/python
 export PATH=/ourpython_bin:"$PATH"
+export PLATFORM_CMAKE_OPTS=
 echo path is "$PATH"
 echo python version is "$(python --version)"
+echo PLATFORM_CMAKE_OPTS= "$PLATFORM_CMAKE_OPTS"
 
 ../commonbuild

util/ci/commonbuild

@@ -7,11 +7,11 @@ cd build
 export TZ="America/Los_Angeles"
 
 if [[ "$BUILDTYPE" == "cmake-make" ]]; then
-    cmake ../gnucash
+    cmake ../gnucash $PLATFORM_CMAKE_OPTS
     make -j 4
     make check || ../afterfailure
 elif [[ "$BUILDTYPE" == "cmake-ninja" ]]; then
-    cmake ../gnucash -DWITH_PYTHON=ON -DCMAKE_BUILD_TYPE=debug -G Ninja
+    cmake ../gnucash -DWITH_PYTHON=ON -DCMAKE_BUILD_TYPE=debug -G Ninja $PLATFORM_CMAKE_OPTS
     ninja
     ninja check || ../afterfailure;
 else

util/ci/ubuntu-14.04-testscript

@@ -4,5 +4,7 @@
 #  exit immediately.
 
 export GTEST_ROOT=/gtest/googletest GMOCK_ROOT=/gtest/googlemock
+export PLATFORM_CMAKE_OPTS="-DALLOW_OLD_GETTEXT=ON"
+echo PLATFORM_CMAKE_OPTS= "$PLATFORM_CMAKE_OPTS"
 
 ../commonbuild