Init Danger/Endanger with Backbone/package.json versions rules

danger/rules/migrateBackboneToRedux.ts

@@ -0,0 +1,54 @@
+// Copyright 2022 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import { Line, Rule } from 'endanger';
+
+export default function migrateBackboneToRedux() {
+  return new Rule({
+    match: {
+      files: ['**/*.{js,jsx,ts,tsx}'],
+    },
+    messages: {
+      foundNewBackboneFile: `
+				**Prefer Redux**
+				Don't create new Backbone files, use Redux
+			`,
+      foundBackboneFileWithManyChanges: `
+				**Prefer Redux**
+				Migrate Backbone files to Redux when making major changes
+			`,
+    },
+    async run({ files, context }) {
+      for (let file of files.touched) {
+        let lines = await file.lines();
+        let matchedLine: Line | null = null;
+
+        for (let line of lines) {
+          // Check for the most stable part of the backbone `import`
+          if (
+            (await line.contains("from 'backbone'")) ||
+            (await line.contains('window.Backbone'))
+          ) {
+            matchedLine = line;
+            break;
+          }
+        }
+
+        if (!matchedLine) {
+          continue;
+        }
+
+        if (file.created) {
+          context.warn('foundNewBackboneFile', { file, line: matchedLine });
+        } else if (file.modifiedOnly) {
+          if (await file.diff().changedBy({ added: 0.1 })) {
+            context.warn('foundBackboneFileWithManyChanges', {
+              file,
+              line: matchedLine,
+            });
+          }
+        }
+      }
+    },
+  });
+}