chore: augment build script to build forked modules into correct bundles

web3.js/package.json

@@ -82,7 +82,7 @@
     "@babel/register": "^7.12.13",
     "@commitlint/config-conventional": "^15.0.0",
     "@commitlint/travis-cli": "^17.0.0",
-    "@rollup/plugin-alias": "^3.1.2",
+    "@rollup/plugin-alias": "^3.1.9",
     "@rollup/plugin-babel": "^5.2.3",
     "@rollup/plugin-commonjs": "^22.0.0",
     "@rollup/plugin-json": "^4.1.0",

web3.js/rollup.config.js

@@ -1,6 +1,9 @@
+import alias from '@rollup/plugin-alias';
 import babel from '@rollup/plugin-babel';
 import commonjs from '@rollup/plugin-commonjs';
+import * as fs from 'fs';
 import json from '@rollup/plugin-json';
+import path from 'path';
 import nodeResolve from '@rollup/plugin-node-resolve';
 import replace from '@rollup/plugin-replace';
 import {terser} from 'rollup-plugin-terser';
@@ -15,6 +18,41 @@ function generateConfig(configType, format) {
   const config = {
     input: 'src/index.ts',
     plugins: [
+      alias({
+        entries: [
+          {
+            find: /^\./, // Relative paths.
+            replacement: '.',
+            async customResolver(source, importer, options) {
+              const resolved = await this.resolve(source, importer, {
+                skipSelf: true,
+                ...options,
+              });
+              if (resolved == null) {
+                return;
+              }
+              const {id: resolvedId} = resolved;
+              const directory = path.dirname(resolvedId);
+              const moduleFilename = path.basename(resolvedId);
+              const forkPath = path.join(
+                directory,
+                '__forks__',
+                configType,
+                moduleFilename,
+              );
+              const hasForkCacheKey = `has_fork:${forkPath}`;
+              let hasFork = this.cache.get(hasForkCacheKey);
+              if (hasFork === undefined) {
+                hasFork = fs.existsSync(forkPath);
+                this.cache.set(hasForkCacheKey, hasFork);
+              }
+              if (hasFork) {
+                return forkPath;
+              }
+            },
+          },
+        ],
+      }),
       commonjs(),
       nodeResolve({
         browser,

web3.js/yarn.lock

@@ -1521,9 +1521,10 @@
   dependencies:
     "@octokit/openapi-types" "^11.2.0"
 
-"@rollup/plugin-alias@^3.1.2":
+"@rollup/plugin-alias@^3.1.9":
   version "3.1.9"
-  resolved "https://registry.npmjs.org/@rollup/plugin-alias/-/plugin-alias-3.1.9.tgz"
+  resolved "https://registry.npmjs.org/@rollup/plugin-alias/-/plugin-alias-3.1.9.tgz#a5d267548fe48441f34be8323fb64d1d4a1b3fdf"
+  integrity sha512-QI5fsEvm9bDzt32k39wpOwZhVzRcL5ydcffUHMyLVaVaLeC70I8TJZ17F1z1eMoLu4E/UOcH9BWVkKpIKdrfiw==
   dependencies:
     slash "^3.0.0"