[gnome-contacts] meson: Require Vala > 0.40.10

[Niels De Graef <nielsdg src gnome org>]

commit b007812ab2257ed133c4bc4861288ec23f5b89cb
Author: Niels De Graef <nielsdegraef gmail com>
Date:   Sun Jun 7 09:53:00 2020 +0200

    meson: Require Vala > 0.40.10
    
    @ricotz helpfully pointed out that we don't need the
    `--disable-since-check`, since we don't even compile on valac 0.38.10.
    
    Let's remove the check for the option, and instead have a check at the
    beginning that people aren't trying to compile Contcts on a too old
    Vala.

 meson.build | 17 +++++++++++------
 1 file changed, 11 insertions(+), 6 deletions(-)
---
diff --git a/meson.build b/meson.build
index 9005484..c69deeb 100644
--- a/meson.build
+++ b/meson.build
@@ -32,6 +32,13 @@ min_eds_version = '3.13.90'
 min_folks_version = '0.11.4'
 min_glib_version = '2.44' # We also use this value for --target-glib, so scratch the micro version.
 
+# We know that compiling on a lower version doesn't work
+min_vala_version = '0.40.10'
+if valac.version().version_compare('<' + min_vala_version)
+  error('Your Vala installation is too old (@0@).'.format(valac.version())
+      + ' Please make sure you have at least Vala ' + min_vala_version)
+endif
+
 math = meson.get_compiler('c').find_library('m')
 
 folks = dependency('folks', version: '>=' + min_folks_version)
@@ -76,12 +83,10 @@ if not libhandy.found()
 
   # We need to add this, since Vala queries the pkgconfig version on its own
   # and will error out if that is lower then required one
-  if valac.version().version_compare('>= 0.31.1')
-    add_project_arguments(
-      [ '--disable-since-check' ],
-      language: 'vala'
-    )
-  endif
+  add_project_arguments(
+    [ '--disable-since-check' ],
+    language: 'vala'
+  )
 
   libhandy_vapidir = meson.build_root() / 'subprojects' / 'libhandy' / 'src'
 else