Revert "Update dependency rollup to v3 (#58252)" (#63790)

This reverts commit a97e9a1e17.

packages/grafana-data/.eslintrc

@@ -1,9 +1,6 @@
 {
   "rules": {
-    "no-restricted-imports": [
-      "error",
-      { "patterns": ["@grafana/runtime", "@grafana/ui", "@grafana/data", "@grafana/e2e/*"] }
-    ]
+    "no-restricted-imports": ["error", { "patterns": ["@grafana/runtime", "@grafana/ui", "@grafana/data", "@grafana/e2e/*"] }]
   },
   "overrides": [
     {
@@ -11,17 +8,6 @@
       "rules": {
         "no-restricted-imports": "off"
       }
-    },
-    // rollup v3 uses esm modules
-    {
-      "files": ["rollup.config.mjs"],
-      "parser": "@babel/eslint-parser",
-      "parserOptions": {
-        "requireConfigFile": false,
-        "babelOptions": {
-          "plugins": ["@babel/plugin-syntax-import-assertions"]
-        }
-      }
     }
   ]
 }

packages/grafana-data/package.json

@@ -28,7 +28,7 @@
     "LICENSE_APACHE2"
   ],
   "scripts": {
-    "build": "tsc -p ./tsconfig.build.json && rollup -c rollup.config.mjs",
+    "build": "tsc -p ./tsconfig.build.json && rollup -c rollup.config.ts",
     "clean": "rimraf ./dist ./compiled ./package.tgz",
     "typecheck": "tsc --emitDeclarationOnly false --noEmit",
     "prepack": "cp package.json package.json.bak && node ../../scripts/prepare-packagejson.js",
@@ -59,6 +59,8 @@
   },
   "devDependencies": {
     "@grafana/tsconfig": "^1.2.0-rc1",
+    "@rollup/plugin-commonjs": "23.0.2",
+    "@rollup/plugin-json": "5.0.1",
     "@rollup/plugin-node-resolve": "15.0.1",
     "@testing-library/dom": "8.20.0",
     "@testing-library/jest-dom": "5.16.5",
@@ -82,10 +84,10 @@
     "react-dom": "17.0.2",
     "react-test-renderer": "17.0.2",
     "rimraf": "3.0.2",
-    "rollup": "3.3.0",
+    "rollup": "2.79.1",
     "rollup-plugin-dts": "^5.0.0",
     "rollup-plugin-esbuild": "5.0.0",
-    "rollup-plugin-node-externals": "^5.0.2",
+    "rollup-plugin-node-externals": "^5.0.0",
     "sinon": "14.0.1",
     "typescript": "4.8.4"
   },

packages/grafana-data/rollup.config.ts

@@ -4,7 +4,7 @@ import dts from 'rollup-plugin-dts';
 import esbuild from 'rollup-plugin-esbuild';
 import { externals } from 'rollup-plugin-node-externals';
 
-import pkg from './package.json' assert { type: 'json' };
+const pkg = require('./package.json');
 
 export default [
   {
@@ -21,7 +21,8 @@ export default [
         sourcemap: true,
         dir: path.dirname(pkg.publishConfig.module),
         preserveModules: true,
-        preserveModulesRoot: path.join(process.env.PROJECT_CWD, 'packages/grafana-data/src'),
+        // @ts-expect-error (TS cannot assure that `process.env.PROJECT_CWD` is a string)
+        preserveModulesRoot: path.join(process.env.PROJECT_CWD, `packages/grafana-data/src`),
       },
     ],
   },