chore: add utility getRequireDeclarators

Author: trivikr

src/transforms/v2-to-v3/modules/requireModule/getImportSpecifiers.ts

@@ -1,13 +1,7 @@
-import {
-  CallExpression,
-  Collection,
-  JSCodeshift,
-  Literal,
-  ObjectProperty,
-  Property,
-} from "jscodeshift";
-import { OBJECT_PROPERTY_TYPE_LIST, PACKAGE_NAME } from "../../config";
+import { Collection, JSCodeshift, ObjectProperty, Property } from "jscodeshift";
+import { OBJECT_PROPERTY_TYPE_LIST } from "../../config";
 import { ImportSpecifierType } from "../types";
+import { getRequireDeclarators } from "./getRequireDeclarators";
 
 export const getImportSpecifiers = (
   j: JSCodeshift,
@@ -16,38 +10,7 @@ export const getImportSpecifiers = (
 ): ImportSpecifierType[] => {
   const importSpecifiers = new Set<ImportSpecifierType>();
 
-  const varDeclarators = source
-    .find(j.VariableDeclarator, {
-      init: {
-        type: "CallExpression",
-        callee: { type: "Identifier", name: "require" },
-      },
-    })
-    .nodes()
-    .filter((varDeclarator) => {
-      const declaratorInit = varDeclarator.init;
-      if (!declaratorInit || declaratorInit.type !== "CallExpression") {
-        return false;
-      }
-
-      const callExpression = declaratorInit as CallExpression;
-      if (callExpression.arguments.length !== 1) {
-        return false;
-      }
-
-      const { value: sourceValue } = callExpression.arguments[0] as Literal;
-      if (typeof sourceValue !== "string") {
-        return false;
-      }
-
-      if (path) {
-        return sourceValue === path;
-      } else {
-        return sourceValue.startsWith(PACKAGE_NAME);
-      }
-    });
-
-  for (const varDeclarator of varDeclarators) {
+  for (const varDeclarator of getRequireDeclarators(j, source, path).nodes()) {
     const declaratorId = varDeclarator.id;
 
     if (declaratorId.type === "Identifier") {

src/transforms/v2-to-v3/modules/requireModule/getRequireDeclarators.ts

@@ -0,0 +1,37 @@
+import { CallExpression, Collection, JSCodeshift, Literal, VariableDeclarator } from "jscodeshift";
+import { PACKAGE_NAME } from "../../config";
+
+export const getRequireDeclarators = (
+  j: JSCodeshift,
+  source: Collection<unknown>,
+  path?: string
+): Collection<VariableDeclarator> =>
+  source
+    .find(j.VariableDeclarator, {
+      init: {
+        type: "CallExpression",
+        callee: { type: "Identifier", name: "require" },
+      },
+    })
+    .filter((varDeclarator) => {
+      const declaratorInit = varDeclarator.value.init;
+      if (!declaratorInit || declaratorInit.type !== "CallExpression") {
+        return false;
+      }
+
+      const callExpression = declaratorInit as CallExpression;
+      if (callExpression.arguments.length !== 1) {
+        return false;
+      }
+
+      const { value: sourceValue } = callExpression.arguments[0] as Literal;
+      if (typeof sourceValue !== "string") {
+        return false;
+      }
+
+      if (path) {
+        return sourceValue === path;
+      }
+
+      return sourceValue.startsWith(PACKAGE_NAME);
+    });

src/transforms/v2-to-v3/modules/requireModule/index.ts

@@ -1,2 +1,3 @@
 export * from "./addNamedModule";
 export * from "./getImportSpecifiers";
+export * from "./getRequireDeclarators";