build: Create available translations in Meson

po/meson.build

@@ -1,3 +1,12 @@
+translations = []
 po_files = run_command('ls', check: true).stdout().strip()
+foreach po_file : po_files.split('\n')
+  if po_file.endswith('.po')
+    translations += po_file.substring(0, -3)
+  endif
+endforeach
+
+# create Python list
+available_translations = '["' + '", "'.join(translations) + '"]'
 
 i18n.gettext('os-installer', preset: 'glib', args: '--add-location=file')

src/meson.build

@@ -8,7 +8,7 @@ conf.set('PYTHON', python.find_installation('python3').full_path())
 conf.set('VERSION', meson.project_version())
 conf.set('localedir', join_paths(get_option('prefix'), get_option('localedir')))
 conf.set('pkgdatadir', pkgdatadir)
-conf.set('po_files', po_files)
+conf.set('available_translations', available_translations)
 
 configure_file(
   input: 'os-installer.in',

src/os-installer.in

@@ -5,9 +5,7 @@ import signal
 import sys
 
 localedir = '@localedir@'
-# TODO: Flatten this string in meson?
-po_files='''@po_files@'''.split('\n')
-available_translations = [po[:-3] for po in po_files if po.endswith('.po')]
+available_translations = @available_translations@
 config_localedir="/etc/os-installer/po/"
 pkgdatadir = '@pkgdatadir@'
 VERSION = '@VERSION@'