Localising your application with GNU gettext takes a little effort but
is quite straightforward. We'll create a
po subdirectory at your
project root directory for all the localisation info.
Generating .pot and .po files
In your main meson.build file include the
po subdirectory in the build process.
po subdirectory we need:
LINGUAS: Space separated list of languages
POTFILES: List of source files to scan for translatable strings.
meson.build: Localization specific Meson file
File with space separated list of languages. A sample LINGUAS might look like this.
aa ab ae af
File that lists all the source files that gettext should scan in order to find strings to translate. The syntax of the file is one line per source file and the line must contain the relative path from source root. A sample POTFILES might look like this.
src/file1.c src/file2.c src/subdir/file3.c include/mything/somefile.h
Localization specific Meson file. It imports and uses the
module. If not defined before it needs to define the
i18n = import('i18n') # define GETTEXT_PACKAGE add_project_arguments('-DGETTEXT_PACKAGE="intltest"', language:'c') i18n.gettext(meson.project_name(), args: '--directory=' + meson.source_root() )
The first command imports the
i18n module that provides gettext
features. The fourth line does the actual invocation. The first
argument is the gettext package name. This causes two things to
happen. The first is that Meson will generate binary mo files and put
them to their proper locations when doing an install. The second is
that it creates a build rule to regenerate the main pot file. If you
are using the Ninja backend, this is how you would invoke the rebuild.
generate .pot file
Then we need to generate the main pot file. The potfile can have any
name but is usually the name of the gettext package. Let's say the
project is called intltest. In this case the corresponding pot file
would be called
Run the following command from your build folder to generate the pot file. It is recommended to inspect it manually afterwards and fill in e.g. proper copyright and contact information.
$ meson compile intltest-pot
generate .po files
For each language listed in the array above we need a corresponding
.po file. Those can be generated by running the following command
from your build folder.
$ meson compile intltest-update-po
The results of the search are