env: attempt to support build-self as ESM

- need to use `createRequire` in ESM mode
  - deps: bump `@types/node` to support the types for that as well
  - this is a BREAKING CHANGE as it requires Node 14+
- fix `fs-extra` error due to it being CJS

- add `build-self/*` to `prebuild` clean
  - not to `build-self` script, as the `build-self/` directory has to exist for that
- output as `build-self/index.mjs` instead of `build-self/dist/rollup-plugin-typescript2.es.js`
  - so that types work out of the box -- due to `index.d.ts`
  - and so that Rollup correctly loads it as ESM and not CJS

package.json

@@ -22,11 +22,11 @@
   "homepage": "https://github.com/ezolenko/rollup-plugin-typescript2",
   "author": "@ezolenko",
   "scripts": {
-    "prebuild": "rimraf dist/*",
-    "build": "rollup -c rollup.config.ts --configPlugin \"typescript2={ tsconfigOverride: { compilerOptions: { resolveJsonModule: true } } }\"",
-    "_build-self": "rollup -c rollup.config.self.ts --configPlugin ./build-self/dist/rollup-plugin-typescript2.es.js",
-    "watch": "npm run _build-self -- -w ",
+    "prebuild": "rimraf dist/* build-self/*.ts build-self/*.*js",
+    "build": "rollup -c rollup.config.ts --configPlugin typescript2=\"{ tsconfigOverride: { compilerOptions: { resolveJsonModule: true } } }\"",
+    "_build-self": "rollup -c rollup.config.self.ts --configPlugin ./build-self/index.mjs=\"{ tsconfigOverride: { compilerOptions: { resolveJsonModule: true } } }\"",
     "build-self": "rimraf dist/* && npm run _build-self",
+    "watch": "npm run _build-self -- -w ",
     "lint": "tslint -c ./tslint.json src/*.ts __tests__/*.ts ./*.js",
     "test": "jest",
     "test:watch": "jest --watch",
@@ -53,7 +53,7 @@
     "@types/graphlib": "2.1.7",
     "@types/jest": "^27.5.0",
     "@types/lodash": "4.14.161",
-    "@types/node": "8.0.47",
+    "@types/node": "^20.4.2",
     "@types/object-hash": "1.3.3",
     "@types/semver": "7.3.12",
     "colors": "1.4.0",

rollup.config.base.ts

@@ -59,7 +59,7 @@ export default {
 		},
 		{
 			format: "es",
-			file: "build-self/" + pkg.module,
+			file: "build-self/index.mjs",
 			sourcemap: true,
 			banner: "/* eslint-disable */",
 			exports: "auto",

rollup.config.self.ts

@@ -1,4 +1,4 @@
-import ts from "./build-self/dist/rollup-plugin-typescript2.es";
+import ts from "./build-self/index";
 
 import config from "./rollup.config.base";
 

src/index.ts

@@ -1,3 +1,4 @@
+import { createRequire } from "module";
 import { relative, dirname, normalize as pathNormalize, resolve } from "path";
 import * as tsTypes from "typescript";
 import { PluginImpl, InputOptions, TransformResult, SourceMap, Plugin } from "rollup";
@@ -16,6 +17,8 @@ import { convertDiagnostic, printDiagnostics } from "./diagnostics";
 import { TSLIB, TSLIB_VIRTUAL, tslibSource, tslibVersion } from "./tslib";
 import { createFilter } from "./get-options-overrides";
 
+const require = createRequire(import.meta.url);
+
 // these use globals during testing and are substituted by @rollup/plugin-replace during builds
 const TS_VERSION_RANGE = (global as any)?.rpt2__TS_VERSION_RANGE || "$TS_VERSION_RANGE";
 const ROLLUP_VERSION_RANGE = (global as any)?.rpt2__ROLLUP_VERSION_RANGE || "$ROLLUP_VERSION_RANGE";

src/rollingcache.ts

@@ -1,9 +1,11 @@
 import { existsSync, readdirSync, renameSync } from "fs";
-import { emptyDirSync, ensureFileSync, readJsonSync, removeSync, writeJsonSync } from "fs-extra";
+import fsExtra from "fs-extra"; // TODO: replace with fs-extra/esm once we support node16+ moduleResolution
 import * as _ from "lodash";
 
 import { ICache } from "./icache";
 
+const { emptyDirSync, ensureFileSync, readJsonSync, removeSync, writeJsonSync } = fsExtra; // TODO: per above, replace as named exports once we support node16+ moduleResolution
+
 /**
  * Saves data in new cache folder or reads it from old one.
  * Avoids perpetually growing cache and situations when things need to consider changed and then reverted data to be changed.

src/tslib.ts

@@ -1,3 +1,4 @@
+import { createRequire } from "module";
 import { readFileSync } from "fs";
 
 // The injected id for helpers.
@@ -6,6 +7,8 @@ export const TSLIB_VIRTUAL = "\0tslib.js";
 export let tslibSource: string;
 export let tslibVersion: string;
 
+const require = createRequire(import.meta.url);
+
 try
 {
 	// tslint:disable-next-line:no-string-literal no-var-requires