meta-refkit-extra: build testing for computer vision demo

Our CI system does not enable the layer by default to avoid tainting
"normal" builds. However, we need to ensure that the extra content at
least continues to build.

This can be done in a meta-refkit selftest which adds the extra layer
as needed and removes it again. This is sub-optimal because it adds a
long-running test with no output while the test runs; extending the CI
setup so that it covers different build configurations would be
better. But for now the selftest is better than nothing.

Signed-off-by: Patrick Ohly <[email protected]>

Author: pohly

meta-refkit/lib/oeqa/selftest/meta-refkit-extra.py

@@ -51,9 +51,42 @@ def setUpLocal(self):
                 self.skipTest('meta-refkit-extra already in bblayers.conf')
             if layer == 'meta-refkit':
                 self.refkit_extra_path = path + '/../meta-refkit-extra'
+        self.extra_conf = "require conf/distro/include/refkit-extra.conf"
+        self.image_dir = get_bb_var('DEPLOY_DIR_IMAGE')
+        self.machine = get_bb_var('MACHINE')
+
+    def enable_refkit_extra(self):
+        '''
+        Adds the meta-refkit-extra layer and enables its content.
+        Will be undone after the test completes.
+        '''
+        self.write_bblayers_config('REFKIT_LAYERS += "%s"' % self.refkit_extra_path)
+        self.write_config(self.extra_conf)
 
     def test_yocto_compat(self):
         """
         Checks for 'Yocto Compatible 2.0' using the yocto-compat-layer.py tool.
         """
         runCmd("yocto-compat-layer.py '%s'" % self.refkit_extra_path)
+
+    def test_build_computervision(self):
+        """
+        Build an image with the extra packages mentioned in meta-refkit-extra/doc/computervision.rst.
+        """
+        self.enable_refkit_extra()
+        image = 'refkit-image-common'
+        packages = 'caffe-imagenet-model python3-pyrealsense opencv'
+        result = bitbake(image, postconfig='''
+REFKIT_IMAGE_EXTRA_INSTALL = "%s"
+        ''' % packages)
+
+        # Ensure that the packages really were installed.
+        manifest = os.path.join(self.image_dir, '%s-%s.manifest' % (image, self.machine))
+        with open(manifest) as f:
+            content = f.read()
+            missing = []
+            for package in packages.split():
+                if not package in content.split():
+                    missing.append(package)
+            if missing:
+                self.fail('%s not installed in %s:\n%s' % (missing, manifest, content))