chore: Enable import/export rule (#16843)

.yarn/patches/eslint-plugin-import-npm-2.30.0-4fd74d3ee6.patch

@@ -0,0 +1,37 @@
+diff --git a/lib/rules/export.js b/lib/rules/export.js
+index a155254c8e4c00816ef0cb128ab8c8b6d60be838..8baf0fbd492ad5d34b6e2932afe78bced223cdbc 100644
+--- a/lib/rules/export.js
++++ b/lib/rules/export.js
+@@ -39,17 +39,21 @@ var tsTypePrefix = 'type:';
+ function isTypescriptFunctionOverloads(nodes) {
+   var nodesArr = Array.from(nodes);
+
+-  var idents = (0, _arrayPrototype2['default'])(
+-  nodesArr,
+-  function (node) {return node.declaration && (
+-    node.declaration.type === 'TSDeclareFunction' // eslint 6+
+-    || node.declaration.type === 'TSEmptyBodyFunctionDeclaration' // eslint 4-5
+-    ) ?
+-    node.declaration.id.name :
+-    [];});
+-
+-  if (new Set(idents).size !== idents.length) {
+-    return true;
++  if (nodesArr[0].type === "ExportDefaultDeclaration") {
++    let num = 0;
++    for (const node of nodesArr) {
++      if (
++        // eslint 6+
++        node.declaration.type === 'TSDeclareFunction' ||
++        // eslint 4-5
++        node.declaration.type === 'TSEmptyBodyFunctionDeclaration'
++      ) {
++        num++;
++      }
++    }
++    if (num === nodesArr.length - 1) {
++      return true;
++    }
+   }
+
+   var types = new Set(nodesArr.map(function (node) {return node.parent.type;}));

eslint.config.mjs

@@ -111,6 +111,7 @@ export default [
     rules: {
       "n/no-process-exit": "error",
       "import/no-extraneous-dependencies": "error",
+      "import/export": "error",
       "regexp/match-any": ["error", { allows: ["[^]", "dotAll"] }],
       "unicorn/prefer-set-has": "error",
       "unicorn/no-typeof-undefined": "error",

package.json

@@ -55,7 +55,7 @@
     "eslint-config-prettier": "^9.1.0",
     "eslint-formatter-codeframe": "^7.32.1",
     "eslint-import-resolver-node": "^0.3.9",
-    "eslint-plugin-import": "^2.29.1",
+    "eslint-plugin-import": "patch:eslint-plugin-import@npm%3A2.30.0#~/.yarn/patches/eslint-plugin-import-npm-2.30.0-4fd74d3ee6.patch",
     "eslint-plugin-jest": "^27.9.0",
     "eslint-plugin-n": "^17.9.0",
     "eslint-plugin-regexp": "^2.6.0",

packages/babel-types/src/index.ts

@@ -13,6 +13,7 @@ export { default as createUnionTypeAnnotation } from "./builders/flow/createFlow
 export { default as createFlowUnionType } from "./builders/flow/createFlowUnionType.ts";
 export { default as createTSUnionType } from "./builders/typescript/createTSUnionType.ts";
 export * from "./builders/generated/index.ts";
+// eslint-disable-next-line import/export
 export * from "./builders/generated/uppercase.js";
 export * from "./builders/productions.ts";