add require_bundle_changes to yaml (#226)

* add require_bundle_changes to yaml

* add property to calculate total_size_delta for BA comparison

shared/bundle_analysis/comparison.py

@@ -234,6 +234,10 @@ def bundle_changes(self) -> Iterator[BundleChange]:
                 size_delta=-base_bundle_report.total_size(),
             )
 
+    @property
+    def total_size_delta(self) -> int:
+        return sum(bundle_change.size_delta for bundle_change in self.bundle_changes())
+
     def bundle_comparison(self, bundle_name: str) -> BundleComparison:
         """
         More detailed comparison (about asset changes) for a particular bundle that

shared/validation/user_schema.py

@@ -455,6 +455,7 @@
                 "nullable": True,
             },
             "require_changes": {"type": "boolean"},
+            "require_bundle_changes": {"type": "boolean"},
             "require_base": {"type": "boolean"},
             "require_head": {"type": "boolean"},
             "show_critical_paths": {"type": "boolean"},

tests/unit/bundle_analysis/test_bundle_comparison.py

@@ -123,3 +123,35 @@ def test_bundle_analysis_comparison():
 
     with pytest.raises(MissingBundleError):
         comparison.bundle_comparison("new")
+
+
+def test_bundle_analysis_total_size_delta():
+    loader = BundleAnalysisReportLoader(
+        storage_service=MemoryStorageService({}),
+        repo_key="testing",
+    )
+
+    comparison = BundleAnalysisComparison(
+        loader=loader,
+        base_report_key="base-report",
+        head_report_key="head-report",
+    )
+
+    base_report = BundleAnalysisReport()
+    base_report.ingest(base_report_bundle_stats_path)
+
+    old_bundle = Bundle(name="old")
+    base_report.db_session.add(old_bundle)
+    base_report.db_session.commit()
+
+    head_report = BundleAnalysisReport()
+    head_report.ingest(head_report_bundle_stats_path)
+
+    new_bundle = Bundle(name="new")
+    head_report.db_session.add(new_bundle)
+    head_report.db_session.commit()
+
+    loader.save(base_report, "base-report")
+    loader.save(head_report, "head-report")
+
+    assert comparison.total_size_delta == 1100