po: Add basic translation support

The messages in the polkit policy file need translating.

Signed-off-by: Philip Withnall <withnall@endlessm.com>

https://phabricator.endlessm.com/T23858

accounts-service/meson.build

@@ -1,5 +1,10 @@
-install_data('com.endlessm.ParentalControls.policy',
-  install_dir: polkitpolicydir)
+i18n.merge_file('com.endlessm.ParentalControls.policy',
+  input: 'com.endlessm.ParentalControls.policy.in',
+  output: 'com.endlessm.ParentalControls.policy',
+  po_dir: po_dir,
+  install: true,
+  install_dir: polkitpolicydir,
+)
 
 install_data('com.endlessm.ParentalControls.AppFilter.xml',
   install_dir: dbusinterfacesdir)

meson.build

@@ -9,9 +9,11 @@ project('eos-parental-controls', 'c',
   ]
 )
 
+i18n = import('i18n')
 pkgconfig = import('pkgconfig')
 
 meson_make_symlink = join_paths(meson.source_root(), 'tools', 'meson-make-symlink.sh')
+po_dir = join_paths(meson.source_root(), 'po')
 
 prefix = get_option('prefix')
 datadir = join_paths(prefix, get_option('datadir'))

po/POTFILES.in

@@ -0,0 +1,3 @@
+# List of source files containing translatable strings.
+# Please keep this file sorted alphabetically.
+accounts-service/com.endlessm.ParentalControls.policy

po/meson.build

@@ -0,0 +1 @@
+i18n.gettext('eos-parental-controls', preset: 'glib')