[mutter] meson: Add option flags to control test suites building

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit 5d1a87d3554a69db89bb63cebd65fadf1b82169b
Author: Marco Trevisan (Treviño) <mail 3v1n0 net>
Date:   Wed Feb 13 12:51:21 2019 -0500

    meson: Add option flags to control test suites building
    
    Now the `tests` meson option controls weather we should build all the test suites
    while `core_tests` controls mutter tests.
    
    https://gitlab.gnome.org/GNOME/mutter/merge_requests/442

 meson.build       | 21 +++++++++++++++------
 meson_options.txt |  8 +++++++-
 src/meson.build   |  2 +-
 3 files changed, 23 insertions(+), 8 deletions(-)
---
diff --git a/meson.build b/meson.build
index 1c865759d..2b65b036f 100644
--- a/meson.build
+++ b/meson.build
@@ -246,15 +246,23 @@ if have_introspection
   ]
 endif
 
-have_cogl_tests = get_option('cogl_tests')
-have_clutter_tests = get_option('clutter_tests')
-have_installed_tests = get_option('installed_tests')
-
 have_tests = get_option('tests')
+have_core_tests = false
+have_cogl_tests = false
+have_clutter_tests = false
+have_installed_tests = false
+
 if have_tests
-  if not have_wayland
-    error('Tests require Wayland to be enabled')
+  have_core_tests = get_option('core_tests')
+  if have_core_tests
+    if not have_wayland
+      error('Tests require Wayland to be enabled')
+    endif
   endif
+
+  have_cogl_tests = get_option('cogl_tests')
+  have_clutter_tests = get_option('clutter_tests')
+  have_installed_tests = get_option('installed_tests')
 endif
 
 required_functions = [
@@ -405,6 +413,7 @@ output = [
   '    Tests:',
   '',
   '        Enabled.................. ' + have_tests.to_string(),
+  '        Core tests............... ' + have_core_tests.to_string(),
   '        Cogl tests............... ' + have_cogl_tests.to_string(),
   '        Clutter tests............ ' + have_clutter_tests.to_string(),
   '        Installed tests.......... ' + have_installed_tests.to_string(),
diff --git a/meson_options.txt b/meson_options.txt
index add49c866..1e122300e 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -111,10 +111,16 @@ option('clutter_tests',
   description: 'Enable clutter tests'
 )
 
+option('core_tests',
+  type: 'boolean',
+  value: true,
+  description: 'Enable mutter core tests'
+)
+
 option('tests',
   type: 'boolean',
   value: true,
-  description: 'Enable mutter tests'
+  description: 'Enable tests globally. Specific test suites can be controlled with core_tests, 
clutter_tests, and cogl_tests'
 )
 
 option('installed_tests',
diff --git a/src/meson.build b/src/meson.build
index 1370eac0b..a55db8a25 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -875,6 +875,6 @@ pkg.generate(libmutter,
 
 subdir('compositor/plugins')
 
-if have_tests 
+if have_core_tests
   subdir('tests')
 endif