meson: Add postinstall script to compile schemas etc

Closes #298

build-aux/meson/postinstall.py

@@ -0,0 +1,18 @@
+#!/usr/bin/env python3
+
+from os import environ, path
+from subprocess import call
+
+# Package managers set this, so we don't need to run
+if not environ.get('DESTDIR', ''):
+    prefix = environ.get('MESON_INSTALL_PREFIX', '/usr/local')
+    datadir = path.join(prefix, 'share')
+
+    print('Updating icon cache...')
+    call(['gtk-update-icon-cache', '-qtf', path.join(datadir, 'icons', 'hicolor')])
+
+    print('Updating desktop database...')
+    call(['update-desktop-database', path.join(datadir, 'applications')])
+
+    print('Compiling schemas...')
+    call(['glib-compile-schemas', path.join(datadir, 'glib-2.0', 'schemas')])

meson.build

@@ -125,3 +125,4 @@ subdir('doc')
 subdir('data')
 subdir('tests')
 
+meson.add_install_script('build-aux/meson/postinstall.py')