[gtk/wip/Jehan/gio-querymodules-pkg-config: 27/27] build-aux: fallback to default glib-compile-schemas & gio-querymodules.

[Jehan <jehanp src gnome org>]

commit 8df0c818078f480870befb7935b3d7eeae88512b
Author: Jehan <jehan girinstud io>
Date:   Sun Jun 28 12:39:28 2020 +0200

    build-aux: fallback to default glib-compile-schemas & gio-querymodules.
    
    The pkg-config variables have been added in GLib 2.62.0. Let's fallback
    to default names for these tools in such case (`pkg-config` still
    returns a 0 return value, but with empty output for absent variables).

 build-aux/meson/post-install.py | 6 ++++++
 1 file changed, 6 insertions(+)
---
diff --git a/build-aux/meson/post-install.py b/build-aux/meson/post-install.py
index bdbc8a32c9..e302a6ee5a 100644
--- a/build-aux/meson/post-install.py
+++ b/build-aux/meson/post-install.py
@@ -30,6 +30,9 @@ if 'DESTDIR' not in os.environ:
     glib_compile_schemas = subprocess.check_output(['pkg-config',
                                                    '--variable=glib_compile_schemas',
                                                    'gio-2.0']).strip()
+    if not os.path.exists(glib_compile_schemas):
+        # pkg-config variables only available since GLib 2.62.0.
+        glib_compile_schemas = 'glib-compile-schemas'
     subprocess.call([glib_compile_schemas,
                     os.path.join(gtk_datadir, 'glib-2.0', 'schemas')])
 
@@ -49,4 +52,7 @@ if 'DESTDIR' not in os.environ:
     gio_querymodules = subprocess.check_output(['pkg-config',
                                                 '--variable=gio_querymodules',
                                                 'gio-2.0']).strip()
+    if not os.path.exists(gio_querymodules):
+        # pkg-config variables only available since GLib 2.62.0.
+        gio_querymodules = 'gio-querymodules'
     subprocess.call([gio_querymodules, gtk_printmodule_dir])