Add a `required` argument to `subproject`

Allowing to use the new "feature" option type and allowing not to fail
on subproject if it is not necessary to fail.

By default subprojects are "required" so previous behaviour is not
changed.

Fixes #3880

1 files changed, 10 insertions, 0 deletions

diff --git a/run_unittests.py b/run_unittests.py
index 5da2798..ebead66 100755
--- a/run_unittests.py
+++ b/run_unittests.py
@@ -2848,6 +2848,16 @@ class FailureTests(BasePlatformTests):
         msg = '.*WARNING:.*feature.*build_always_stale.*custom_target.*'
         self.assertMesonDoesNotOutput(vcs_tag, msg, meson_version='>=0.43')
 
+    def test_missing_subproject_not_required_and_required(self):
+        self.assertMesonRaises("sub1 = subproject('not-found-subproject', required: false)\n" +
+                               "sub2 = subproject('not-found-subproject', required: true)",
+                               """.*Subproject "subprojects/not-found-subproject" required but not found.*""")
+
+    def test_get_variable_on_not_found_project(self):
+        self.assertMesonRaises("sub1 = subproject('not-found-subproject', required: false)\n" +
+                               "sub1.get_variable('naaa')",
+                               """Subproject "subprojects/not-found-subproject" disabled can't get_variable on it.""")
+
 
 class WindowsTests(BasePlatformTests):
     '''