[gnote/meson] Add post install script for updating caches

[Aurimas Černius <aurimasc src gnome org>]

commit f875ea2b3f75faaf450dc44b1f255e230e9f7f35
Author: Aurimas Černius <aurisc4 gmail com>
Date:   Mon Apr 5 13:34:49 2021 +0300

    Add post install script for updating caches

 meson.build     |  4 ++++
 post-install.py | 19 +++++++++++++++++++
 2 files changed, 23 insertions(+)
---
diff --git a/meson.build b/meson.build
index f8c61037..f4b13bdc 100644
--- a/meson.build
+++ b/meson.build
@@ -2,6 +2,7 @@ project('gnote', 'cpp', version: '41.alpha', meson_version: '>=0.49.0')
 
 gnome = import('gnome')
 i18n = import('i18n')
+python = import('python')
 
 gnote_release = meson.project_version().split('.')[0]
 libgnote_version_info = '0.0.0'
@@ -39,6 +40,9 @@ configure_file(
 root_include_dir = include_directories('.')
 srcdir = meson.current_source_dir()
 
+meson.add_install_script(python.find_installation('python3').path(),
+  join_paths(meson.source_root(), 'post-install.py'))
+
 subdir('data')
 subdir('help')
 subdir('src')
diff --git a/post-install.py b/post-install.py
new file mode 100755
index 00000000..69d526a3
--- /dev/null
+++ b/post-install.py
@@ -0,0 +1,19 @@
+#!/usr/bin/env python3
+
+import os
+import pathlib
+import subprocess
+
+prefix = pathlib.Path(os.environ.get('MESON_INSTALL_PREFIX', '/usr/local'))
+datadir = prefix / 'share'
+destdir = os.environ.get('DESTDIR', '')
+
+if not destdir:
+    print('Compiling gsettings schemas...')
+    subprocess.call(['glib-compile-schemas', str(datadir / 'glib-2.0' / 'schemas')])
+
+    print('Updating icon cache...')
+    subprocess.call(['gtk-update-icon-cache', '-qtf', str(datadir / 'icons' / 'hicolor')])
+
+    print('Updating desktop database...')
+    subprocess.call(['update-desktop-database', '-q', str(datadir / 'applications')])