feat: add support for forge.config.ts et. al

This brings in rechoir and interpret which allow arbitrary extensions / loaders for our forge config.

Notably this allows us to make forge.config.ts a thing (and thus generate type safe configurations).

package.json

@@ -64,6 +64,7 @@
     "got": "^11.8.5",
     "html-webpack-plugin": "^5.3.1",
     "inquirer": "^8.0.0",
+    "interpret": "^3.1.1",
     "lodash": "^4.17.20",
     "log-symbols": "^4.0.0",
     "mime-types": "^2.1.25",
@@ -73,6 +74,7 @@
     "parse-author": "^2.0.0",
     "pretty-ms": "^7.0.0",
     "progress": "^2.0.3",
+    "rechoir": "^0.8.0",
     "resolve-package": "^1.0.1",
     "semver": "^7.2.1",
     "source-map-support": "^0.5.13",
@@ -102,6 +104,7 @@
     "@types/fetch-mock": "^7.3.1",
     "@types/fs-extra": "^9.0.6",
     "@types/inquirer": "^8.1.1",
+    "@types/interpret": "^1.1.1",
     "@types/listr": "^0.14.2",
     "@types/lodash": "^4.14.166",
     "@types/mime-types": "^2.1.0",
@@ -111,6 +114,7 @@
     "@types/node-fetch": "^2.5.5",
     "@types/progress": "^2.0.5",
     "@types/proxyquire": "^1.3.28",
+    "@types/rechoir": "^0.6.1",
     "@types/semver": "^7.3.4",
     "@types/sinon": "^10.0.0",
     "@types/sinon-chai": "^3.2.5",

packages/api/core/package.json

@@ -25,7 +25,9 @@
     "@electron-forge/maker-wix": "6.0.0-beta.68",
     "@electron-forge/maker-zip": "6.0.0-beta.68",
     "@electron-forge/test-utils": "6.0.0-beta.68",
+    "@types/interpret": "^1.1.1",
     "@types/progress": "^2.0.5",
+    "@types/rechoir": "^0.6.1",
     "chai": "^4.3.3",
     "chai-as-promised": "^7.0.0",
     "cross-env": "^7.0.2",
@@ -56,10 +58,12 @@
     "find-up": "^5.0.0",
     "fs-extra": "^10.0.0",
     "got": "^11.8.5",
+    "interpret": "^3.1.1",
     "lodash": "^4.17.20",
     "log-symbols": "^4.0.0",
     "node-fetch": "^2.6.7",
     "progress": "^2.0.3",
+    "rechoir": "^0.8.0",
     "resolve-package": "^1.0.1",
     "semver": "^7.2.1",
     "source-map-support": "^0.5.13",

packages/api/core/src/api/make.ts

@@ -2,7 +2,7 @@ import path from 'path';
 
 import { asyncOra } from '@electron-forge/async-ora';
 import MakerBase from '@electron-forge/maker-base';
-import { ForgeArch, ForgeConfig, ForgeConfigMaker, ForgeMakeResult, ForgePlatform, IForgeResolvableMaker } from '@electron-forge/shared-types';
+import { ForgeArch, ForgeConfigMaker, ForgeMakeResult, ForgePlatform, IForgeResolvableMaker, ResolvedForgeConfig } from '@electron-forge/shared-types';
 import { getHostArch } from '@electron/get';
 import chalk from 'chalk';
 import filenamify from 'filenamify';
@@ -29,7 +29,7 @@ class MakerImpl extends MakerBase<any> {
 
 type MakeTargets = ForgeConfigMaker[] | string[];
 
-function generateTargets(forgeConfig: ForgeConfig, overrideTargets?: MakeTargets) {
+function generateTargets(forgeConfig: ResolvedForgeConfig, overrideTargets?: MakeTargets) {
   if (overrideTargets) {
     return overrideTargets.map((target) => {
       if (typeof target === 'string') {
@@ -90,7 +90,7 @@ export default async ({
 }: MakeOptions): Promise<ForgeMakeResult[]> => {
   asyncOra.interactive = interactive;
 
-  let forgeConfig!: ForgeConfig;
+  let forgeConfig!: ResolvedForgeConfig;
   await asyncOra('Resolving Forge Config', async () => {
     const resolvedDir = await resolveDir(dir);
     if (!resolvedDir) {

packages/api/core/src/util/forge-config.ts

@@ -1,8 +1,10 @@
 import path from 'path';
 
-import { ForgeConfig, IForgeResolvableMaker } from '@electron-forge/shared-types';
+import { ForgeConfig, IForgeResolvableMaker, ResolvedForgeConfig } from '@electron-forge/shared-types';
 import fs from 'fs-extra';
+import * as interpret from 'interpret';
 import { template } from 'lodash';
+import * as rechoir from 'rechoir';
 
 import { runMutatingHook } from './hook';
 import PluginInterface from './plugin-interface';
@@ -119,22 +121,29 @@ export function renderConfigTemplate(dir: string, templateObj: any, obj: any): v
   }
 }
 
-export default async (dir: string): Promise<ForgeConfig> => {
+type MaybeESM<T> = T | { default: T };
+
+export default async (dir: string): Promise<ResolvedForgeConfig> => {
   const packageJSON = await readRawPackageJson(dir);
   let forgeConfig: ForgeConfig | string | null = packageJSON.config && packageJSON.config.forge ? packageJSON.config.forge : null;
 
   if (!forgeConfig) {
-    if (await fs.pathExists(path.resolve(dir, 'forge.config.js'))) {
-      forgeConfig = 'forge.config.js';
-    } else {
-      forgeConfig = {} as ForgeConfig;
+    for (const extension of ['.js', ...Object.keys(interpret.extensions)]) {
+      const pathToConfig = path.resolve(dir, `forge.config${extension}`);
+      if (await fs.pathExists(pathToConfig)) {
+        rechoir.prepare(interpret.extensions, pathToConfig, dir);
+        forgeConfig = `forge.config${extension}`;
+        break;
+      }
     }
   }
+  forgeConfig = forgeConfig || ({} as ForgeConfig);
 
   if (await forgeConfigIsValidFilePath(dir, forgeConfig)) {
     try {
       // eslint-disable-next-line @typescript-eslint/no-var-requires
-      forgeConfig = require(path.resolve(dir, forgeConfig as string)) as ForgeConfig;
+      const loaded = require(path.resolve(dir, forgeConfig as string)) as MaybeESM<ForgeConfig>;
+      forgeConfig = 'default' in loaded ? loaded.default : loaded;
     } catch (err) {
       console.error(`Failed to load: ${path.resolve(dir, forgeConfig as string)}`);
       throw err;
@@ -149,17 +158,19 @@ export default async (dir: string): Promise<ForgeConfig> => {
     publishers: [],
     plugins: [],
   };
-  forgeConfig = {
+  let resolvedForgeConfig: ResolvedForgeConfig = {
     ...defaultForgeConfig,
     ...forgeConfig,
+    // eslint-disable-next-line @typescript-eslint/no-explicit-any
+    pluginInterface: null as any,
   };
 
   const templateObj = { ...packageJSON, year: new Date().getFullYear() };
-  renderConfigTemplate(dir, templateObj, forgeConfig);
+  renderConfigTemplate(dir, templateObj, resolvedForgeConfig);
 
-  forgeConfig.pluginInterface = new PluginInterface(dir, forgeConfig);
+  resolvedForgeConfig.pluginInterface = new PluginInterface(dir, resolvedForgeConfig);
 
-  forgeConfig = await runMutatingHook(forgeConfig, 'resolveForgeConfig', forgeConfig);
+  resolvedForgeConfig = await runMutatingHook(resolvedForgeConfig, 'resolveForgeConfig', resolvedForgeConfig);
 
-  return proxify<ForgeConfig>(forgeConfig.buildIdentifier || '', forgeConfig, 'ELECTRON_FORGE');
+  return proxify<ResolvedForgeConfig>(resolvedForgeConfig.buildIdentifier || '', resolvedForgeConfig, 'ELECTRON_FORGE');
 };

packages/api/core/src/util/hook.ts

@@ -1,10 +1,10 @@
-import { ForgeConfig } from '@electron-forge/shared-types';
+import { ResolvedForgeConfig } from '@electron-forge/shared-types';
 import debug from 'debug';
 
 const d = debug('electron-forge:hook');
 
 // eslint-disable-next-line @typescript-eslint/no-explicit-any
-export const runHook = async (forgeConfig: ForgeConfig, hookName: string, ...hookArgs: any[]): Promise<void> => {
+export const runHook = async (forgeConfig: ResolvedForgeConfig, hookName: string, ...hookArgs: any[]): Promise<void> => {
   const { hooks } = forgeConfig;
   if (hooks) {
     d(`hook triggered: ${hookName}`);
@@ -16,7 +16,7 @@ export const runHook = async (forgeConfig: ForgeConfig, hookName: string, ...hoo
   await forgeConfig.pluginInterface.triggerHook(hookName, hookArgs);
 };
 
-export async function runMutatingHook<T>(forgeConfig: ForgeConfig, hookName: string, item: T): Promise<T> {
+export async function runMutatingHook<T>(forgeConfig: ResolvedForgeConfig, hookName: string, item: T): Promise<T> {
   const { hooks } = forgeConfig;
   if (hooks) {
     d(`hook triggered: ${hookName}`);

packages/api/core/src/util/out-dir.ts

@@ -1,10 +1,10 @@
 import path from 'path';
 
-import { ForgeConfig } from '@electron-forge/shared-types';
+import { ResolvedForgeConfig } from '@electron-forge/shared-types';
 
 const BASE_OUT_DIR = 'out';
 
-export default (baseDir: string, forgeConfig: ForgeConfig): string => {
+export default (baseDir: string, forgeConfig: ResolvedForgeConfig): string => {
   if (forgeConfig.buildIdentifier) {
     let identifier = forgeConfig.buildIdentifier;
     if (typeof identifier === 'function') {

packages/api/core/src/util/plugin-interface.ts

@@ -1,5 +1,5 @@
 import PluginBase from '@electron-forge/plugin-base';
-import { ForgeConfig, IForgePlugin, IForgePluginInterface, StartResult } from '@electron-forge/shared-types';
+import { IForgePlugin, IForgePluginInterface, ResolvedForgeConfig, StartResult } from '@electron-forge/shared-types';
 import debug from 'debug';
 
 import { StartOptions } from '../api';
@@ -15,9 +15,9 @@ function isForgePlugin(plugin: IForgePlugin | unknown): plugin is IForgePlugin {
 export default class PluginInterface implements IForgePluginInterface {
   private plugins: IForgePlugin[];
 
-  private config: ForgeConfig;
+  private config: ResolvedForgeConfig;
 
-  constructor(dir: string, forgeConfig: ForgeConfig) {
+  constructor(dir: string, forgeConfig: ResolvedForgeConfig) {
     this.plugins = forgeConfig.plugins.map((plugin) => {
       if (isForgePlugin(plugin)) {
         return plugin;

packages/api/core/src/util/read-package-json.ts

@@ -1,6 +1,6 @@
 import path from 'path';
 
-import { ForgeConfig } from '@electron-forge/shared-types';
+import { ResolvedForgeConfig } from '@electron-forge/shared-types';
 import fs from 'fs-extra';
 
 import { runMutatingHook } from './hook';
@@ -9,5 +9,5 @@ import { runMutatingHook } from './hook';
 export const readRawPackageJson = async (dir: string): Promise<any> => fs.readJson(path.resolve(dir, 'package.json'));
 
 // eslint-disable-next-line @typescript-eslint/no-explicit-any
-export const readMutatedPackageJson = async (dir: string, forgeConfig: ForgeConfig): Promise<any> =>
+export const readMutatedPackageJson = async (dir: string, forgeConfig: ResolvedForgeConfig): Promise<any> =>
   runMutatingHook(forgeConfig, 'readPackageJson', await readRawPackageJson(dir));

packages/api/core/test/fast/forge-config_spec.ts

@@ -1,6 +1,6 @@
 import path from 'path';
 
-import { ForgeConfig } from '@electron-forge/shared-types';
+import { ResolvedForgeConfig } from '@electron-forge/shared-types';
 import { expect } from 'chai';
 
 import findConfig, {
@@ -106,21 +106,27 @@ describe('forge-config', () => {
   });
 
   it('should resolve the JS file exports in config.forge points to a JS file and maintain functions', async () => {
-    type MagicFunctionConfig = ForgeConfig & { magicFn: () => string };
+    type MagicFunctionConfig = ResolvedForgeConfig & { magicFn: () => string };
     const conf = (await findConfig(path.resolve(__dirname, '../fixture/dummy_js_conf'))) as MagicFunctionConfig;
     expect(conf.magicFn).to.be.a('function');
     expect(conf.magicFn()).to.be.equal('magic result');
   });
 
-  it('should resolve the JS file exports of forge.config.js if config.forge does not exist points', async () => {
-    type DefaultResolvedConfig = ForgeConfig & { defaultResolved: boolean };
+  it('should resolve the JS file exports of forge.config.js if config.forge does not exist ', async () => {
+    type DefaultResolvedConfig = ResolvedForgeConfig & { defaultResolved: boolean };
     const conf = (await findConfig(path.resolve(__dirname, '../fixture/dummy_default_js_conf'))) as DefaultResolvedConfig;
     expect(conf.buildIdentifier).to.equal('default');
     expect(conf.defaultResolved).to.equal(true);
   });
 
+  it('should resolve the TS file exports of forge.config.ts if config.forge does not exist and the TS config exists', async () => {
+    type DefaultResolvedConfig = ResolvedForgeConfig;
+    const conf = (await findConfig(path.resolve(__dirname, '../fixture/dummy_default_ts_conf'))) as DefaultResolvedConfig;
+    expect(conf.buildIdentifier).to.equal('typescript');
+  });
+
   it('should magically map properties to environment variables', async () => {
-    type MappedConfig = ForgeConfig & {
+    type MappedConfig = ResolvedForgeConfig & {
       s3: {
         secretAccessKey?: string;
       };
@@ -140,7 +146,7 @@ describe('forge-config', () => {
   });
 
   it('should resolve values fromBuildIdentifier', async () => {
-    type ResolveBIConfig = ForgeConfig & {
+    type ResolveBIConfig = ResolvedForgeConfig & {
       topLevelProp: string;
       sub: {
         prop: {
@@ -164,13 +170,13 @@ describe('forge-config', () => {
   });
 
   it('should resolve undefined from fromBuildIdentifier if no value is provided', async () => {
-    type ResolveUndefConfig = ForgeConfig & { topLevelUndef?: string };
+    type ResolveUndefConfig = ResolvedForgeConfig & { topLevelUndef?: string };
     const conf = (await findConfig(path.resolve(__dirname, '../fixture/dummy_js_conf'))) as ResolveUndefConfig;
     expect(conf.topLevelUndef).to.equal(undefined);
   });
 
   it('should leave arrays intact', async () => {
-    type NestedConfig = ForgeConfig & {
+    type NestedConfig = ResolvedForgeConfig & {
       sub: {
         prop: {
           inArray: string[];
@@ -182,7 +188,7 @@ describe('forge-config', () => {
   });
 
   it('should leave regexps intact', async () => {
-    type RegExpConfig = ForgeConfig & { regexp: RegExp };
+    type RegExpConfig = ResolvedForgeConfig & { regexp: RegExp };
     const conf = (await findConfig(path.resolve(__dirname, '../fixture/dummy_js_conf'))) as RegExpConfig;
     expect(conf.regexp).to.be.instanceOf(RegExp);
     expect(conf.regexp.test('foo')).to.equal(true, 'regexp should match foo');

packages/api/core/test/fast/hook_spec.ts

@@ -1,4 +1,4 @@
-import { ForgeConfig, ForgeHookFn } from '@electron-forge/shared-types';
+import { ForgeHookFn, ResolvedForgeConfig } from '@electron-forge/shared-types';
 import { expect } from 'chai';
 import { SinonStub, stub } from 'sinon';
 
@@ -9,7 +9,7 @@ const fakeConfig = {
     triggerHook: async () => false,
     triggerMutatingHook: async (_hookName: string, item: unknown) => item,
   },
-} as unknown as ForgeConfig;
+} as unknown as ResolvedForgeConfig;
 
 describe('hooks', () => {
   describe('runHook', () => {

packages/api/core/test/fast/out-dir_spec.ts

@@ -1,6 +1,6 @@
 import path from 'path';
 
-import { ForgeConfig } from '@electron-forge/shared-types';
+import { ResolvedForgeConfig } from '@electron-forge/shared-types';
 import { expect } from 'chai';
 
 import getCurrentOutDir from '../../src/util/out-dir';
@@ -10,22 +10,22 @@ describe('out-dir', () => {
 
   describe('getCurrentOutDir', () => {
     it('resolves to the default out directory when nothing extra is declared', () => {
-      expect(getCurrentOutDir(DIR, {} as ForgeConfig)).to.equal(`${DIR}${path.sep}out`);
+      expect(getCurrentOutDir(DIR, {} as ResolvedForgeConfig)).to.equal(`${DIR}${path.sep}out`);
     });
 
     it('resolves to the provided identifier', () => {
       expect(
         getCurrentOutDir(DIR, {
           buildIdentifier: 'bar',
-        } as ForgeConfig)
+        } as ResolvedForgeConfig)
       ).to.equal(`${DIR}${path.sep}out${path.sep}bar`);
     });
 
     it('resolves to the return value of provided identifier getter', () => {
       expect(
         getCurrentOutDir(DIR, {
           buildIdentifier: () => 'thing',
-        } as ForgeConfig)
+        } as ResolvedForgeConfig)
       ).to.equal(`${DIR}${path.sep}out${path.sep}thing`);
     });
   });

packages/api/core/test/fast/read-package-json_spec.ts

@@ -1,11 +1,11 @@
 import path from 'path';
 
-import { ForgeConfig } from '@electron-forge/shared-types';
+import { ResolvedForgeConfig } from '@electron-forge/shared-types';
 import { expect } from 'chai';
 
 import { readMutatedPackageJson, readRawPackageJson } from '../../src/util/read-package-json';
 
-const emptyForgeConfig: Partial<ForgeConfig> = {
+const emptyForgeConfig: Partial<ResolvedForgeConfig> = {
   packagerConfig: {},
   rebuildConfig: {},
   makers: [],
@@ -31,7 +31,7 @@ describe('read-package-json', () => {
             triggerHook: () => Promise.resolve(),
             overrideStartLogic: () => Promise.resolve(false),
           },
-        } as ForgeConfig)
+        } as ResolvedForgeConfig)
       ).to.deep.equal(require('../../package.json'));
     });
 
@@ -44,7 +44,7 @@ describe('read-package-json', () => {
             triggerHook: () => Promise.resolve(),
             overrideStartLogic: () => Promise.resolve(false),
           },
-        } as ForgeConfig)
+        } as ResolvedForgeConfig)
       ).to.deep.equal('test_mut');
     });
   });

packages/api/core/test/fast/upgrade-forge-config_spec.ts

@@ -1,3 +1,5 @@
+import assert from 'assert';
+
 import { ForgeConfig, IForgeResolvableMaker, IForgeResolvablePublisher } from '@electron-forge/shared-types';
 import { expect } from 'chai';
 import { merge } from 'lodash';
@@ -104,6 +106,7 @@ describe('upgradeForgeConfig', () => {
     };
     const newConfig = upgradeForgeConfig(oldConfig);
     expect(newConfig.publishers).to.have.lengthOf(1);
+    assert(newConfig.publishers);
     const publisherConfig = (newConfig.publishers[0] as IForgeResolvablePublisher).config;
     expect(publisherConfig.repository).to.deep.equal(repo);
     expect(publisherConfig.octokitOptions).to.deep.equal(octokitOptions);