Add Gitea build, container tests and registry publication

ci/tests/test_docker_configuration.py

@@ -0,0 +1,29 @@
+import json
+from pathlib import Path
+import subprocess
+import tempfile
+import unittest
+
+SCRIPT = Path(__file__).resolve().parents[1] / 'runner/configure-docker.py'
+
+class DockerConfigurationTest(unittest.TestCase):
+    def test_merge_preserves_existing_settings_and_is_idempotent(self):
+        with tempfile.TemporaryDirectory() as directory:
+            path = Path(directory) / 'daemon.json'
+            original = {'features': {'buildkit': True}, 'insecure-registries': ['existing:5000']}
+            path.write_text(json.dumps(original))
+            for _ in range(2):
+                result = subprocess.run(['python3', str(SCRIPT), str(path)], capture_output=True, text=True)
+                self.assertEqual(0, result.returncode, result.stderr)
+            actual = json.loads(path.read_text())
+            self.assertEqual(original['features'], actual['features'])
+            self.assertEqual(['existing:5000', '192.168.2.28:3000'], actual['insecure-registries'])
+            self.assertEqual(original, json.loads(path.with_name('daemon.json.before-agiledancers').read_text()))
+    def test_invalid_configuration_is_left_unchanged(self):
+        with tempfile.TemporaryDirectory() as directory:
+            path = Path(directory) / 'daemon.json'
+            original = '{"insecure-registries": "invalid"}'
+            path.write_text(original)
+            result = subprocess.run(['python3', str(SCRIPT), str(path)], capture_output=True, text=True)
+            self.assertNotEqual(0, result.returncode)
+            self.assertEqual(original, path.read_text())