msetup: Update options when builddir is already configured

`meson setup -Dfoo=bar builddir` command was returning success ignoring
new option values.

This now also update options. It is useful because it means
`meson setup -Dfoo=bar builddir && ninja -C builddir` works regardless
whether builddir already exists or not, and when done in a script,
changing options in the script will automatically trigger a reconfigure
if needed. This was already possible by always passing --reconfigure
argument, but that triggers a reconfigure even when options did not
change.

1 files changed, 7 insertions, 0 deletions

diff --git a/unittests/baseplatformtests.py b/unittests/baseplatformtests.py
index 03ab1c521..514f3b759 100644
--- a/unittests/baseplatformtests.py
+++ b/unittests/baseplatformtests.py
@@ -303,6 +303,13 @@ class BasePlatformTests(TestCase):
             ensure_backend_detects_changes(self.backend)
         self._run(self.mconf_command + arg + [self.builddir])
 
+    def getconf(self, optname: str):
+        opts = self.introspect('--buildoptions')
+        for x in opts:
+            if x.get('name') == optname:
+                return x.get('value')
+        self.fail(f'Option {optname} not found')
+
     def wipe(self):
         windows_proof_rmtree(self.builddir)