[gthumb] meson: added the postinstall script

[Paolo Bacchilega <paobac src gnome org>]

commit 1025c734087654de4b08ea1cd99d6f1e49051f12
Author: Paolo Bacchilega <paobac src gnome org>
Date:   Mon Oct 23 16:26:51 2017 +0200

    meson: added the postinstall script

 meson.build    |    2 ++
 postinstall.py |   27 +++++++++++++++++++++++++++
 2 files changed, 29 insertions(+), 0 deletions(-)
---
diff --git a/meson.build b/meson.build
index 5d82ed6..aacbb0b 100644
--- a/meson.build
+++ b/meson.build
@@ -54,6 +54,8 @@ else
   webalbum_data_dir = pkgdatadir
 endif
 
+meson.add_install_script('postinstall.py')
+
 # Dependencies
 
 if get_option('exiv2')
diff --git a/postinstall.py b/postinstall.py
new file mode 100644
index 0000000..3a245cd
--- /dev/null
+++ b/postinstall.py
@@ -0,0 +1,27 @@
+#!/usr/bin/env python3
+
+import os
+import subprocess
+
+prefix = os.environ.get('MESON_INSTALL_PREFIX', '/usr/local')
+datadir = os.path.join(prefix, 'share')
+
+# Packaging tools define DESTDIR and this isn't needed for them
+if 'DESTDIR' not in os.environ:
+    print('Updating icon cache…')
+    icon_cache_dir = os.path.join(datadir, 'icons', 'hicolor')
+    if not os.path.exists(icon_cache_dir):
+        os.makedirs(icon_cache_dir)
+    subprocess.call(['gtk-update-icon-cache', '-qtf', icon_cache_dir])
+
+    print('Updating desktop database…')
+    desktop_database_dir = os.path.join(datadir, 'applications')
+    if not os.path.exists(desktop_database_dir):
+        os.makedirs(desktop_database_dir)
+    subprocess.call(['update-desktop-database', '-q', desktop_database_dir])
+
+    print('Compiling GSettings schemas…')
+    schemas_dir = os.path.join(datadir, 'glib-2.0', 'schemas')
+    if not os.path.exists(schemas_dir):
+        os.makedirs(schemas_dir)
+    subprocess.call(['glib-compile-schemas', schemas_dir])