feat: Support generating .cjs files

.eslintignore

@@ -1,4 +1,4 @@
-fixtures/*/lib/**
+fixtures/*/lib*/**
 fixtures/*/out/**
 *.d.ts
 *.d.mts

.prettierignore

@@ -9,7 +9,7 @@ coverage
 cspell.json
 **/*.schema.json
 /fixtures/**/out
-/fixtures/**/lib
+/fixtures/**/lib*
 temp
 
 .release-please-manifest.json

fixtures/sample/lib-cjs/app.cjs

@@ -0,0 +1,19 @@
+"use strict";
+var __importDefault = (this && this.__importDefault) || function (mod) {
+    return (mod && mod.__esModule) ? mod : { "default": mod };
+};
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.run = void 0;
+const chalk_1 = __importDefault(require("chalk"));
+const lookup_js_1 = require("./lookup.js");
+async function run() {
+    const guid = 'GUID';
+    const person = await (0, lookup_js_1.lookUpPerson)('GUID');
+    if (!person) {
+        console.log(chalk_1.default.red(`Person ${chalk_1.default.yellow(guid)} not found.`));
+        return;
+    }
+    console.log(`Found: ${person.name}`);
+}
+exports.run = run;
+//# sourceMappingURL=app.js.map

fixtures/sample/lib-cjs/app.d.ts

@@ -0,0 +1,2 @@
+export declare function run(): Promise<void>;
+//# sourceMappingURL=app.d.ts.map

fixtures/sample/lib-cjs/database/fetch.d.ts

@@ -0,0 +1,3 @@
+import { Entity, GUID } from '../types.js';
+export declare function fetchEntity<T extends Entity>(guid: GUID): Promise<T | undefined>;
+//# sourceMappingURL=fetch.d.ts.map

fixtures/sample/lib-cjs/database/index.d.ts

@@ -0,0 +1,2 @@
+export { fetchEntity } from './fetch.js';
+//# sourceMappingURL=index.d.ts.map

fixtures/sample/lib-cjs/index.d.ts

@@ -0,0 +1,4 @@
+export { PrimeNumber, Tuple, GUID, AddressGuid, Address, PhoneNumberGuid, PhoneNumber, PersonGuid, Person, Annotation, } from './types.js';
+export { lookUpPerson } from './lookup.js';
+export { fetchEntity } from './database/index.js';
+//# sourceMappingURL=index.d.ts.map

fixtures/sample/lib-cjs/lookup.d.ts

@@ -0,0 +1,3 @@
+import { Person, PersonGuid } from './types.js';
+export declare function lookUpPerson(_guid: PersonGuid): Promise<Person | undefined>;
+//# sourceMappingURL=lookup.d.ts.map

fixtures/sample/lib-cjs/types.d.ts

@@ -0,0 +1,44 @@
+export type PrimeNumber = number;
+export type Tuple<T, U> = [T, U];
+export type GUID = string;
+export type AddressGuid = GUID;
+export interface EntityBase<T extends string> {
+    guid: GUID;
+    type: T;
+}
+export interface Entity {
+    guid: GUID;
+    type: string;
+}
+export interface Address extends EntityBase<'Address'> {
+    guid: AddressGuid;
+    name: string;
+    street: string;
+    city: string;
+    postalCode: string;
+    country: string;
+    state?: string;
+    provence?: string;
+    annotations?: Annotation[];
+}
+export type PhoneNumberGuid = GUID;
+export interface PhoneNumber extends EntityBase<'PhoneNumber'> {
+    guid: PhoneNumberGuid;
+    name: string;
+    number: string;
+    annotations?: Annotation[];
+}
+export type PersonGuid = GUID;
+export interface Person extends EntityBase<'Person'> {
+    guid: PersonGuid;
+    name: string;
+    aliases?: string[];
+    dob?: string;
+    addresses?: Address[];
+    notes?: Annotation[];
+}
+export interface Annotation extends EntityBase<'Annotation'> {
+    note: string;
+    madeBy: PersonGuid;
+}
+//# sourceMappingURL=types.d.ts.map

fixtures/sample/tsconfig.cjs.json

@@ -0,0 +1,15 @@
+{
+    "$schema": "https://json.schemastore.org/tsconfig",
+    "extends": "@tsconfig/node16/tsconfig.json",
+    "compilerOptions": {
+        "declaration": true,
+        "declarationMap": true,
+        "module": "CommonJS",
+        "moduleResolution": "Node",
+        "newLine": "LF",
+        "outDir": "lib-cjs",
+        "sourceMap": true,
+        "types": ["node"]
+    },
+    "include": ["src"]
+}

fixtures/sample/tsconfig.json

@@ -4,8 +4,8 @@
     "compilerOptions": {
         "declaration": true,
         "declarationMap": true,
-        "module": "ES2020",
-        "moduleResolution": "node16",
+        "module": "Node16",
+        "moduleResolution": "Node16",
         "newLine": "LF",
         "outDir": "lib",
         "sourceMap": true,

src/__snapshots__/app.test.ts.snap

@@ -173,6 +173,43 @@ exports[`app > run (--dry-run) [ Array(3) ] 2`] = `
 exports[`app > run (actual) [ '.', '--root=fixtures/sample' ] 1`] = `
 "Console Output:
 [log]: done.
+[log]: fixtures/sample/lib-cjs/app.cjs - copy
+[log]: fixtures/sample/lib-cjs/app.d.ts -> temp/lib-cjs/app.d.mts Generated
+[log]: fixtures/sample/lib-cjs/app.d.ts.map - copy
+[log]: fixtures/sample/lib-cjs/app.d.ts.map -> temp/lib-cjs/app.d.mts.map Generated
+[log]: fixtures/sample/lib-cjs/app.js -> temp/lib-cjs/app.mjs Generated
+[log]: fixtures/sample/lib-cjs/app.js.map - copy
+[log]: fixtures/sample/lib-cjs/app.js.map -> temp/lib-cjs/app.mjs.map Generated
+[log]: fixtures/sample/lib-cjs/database/fetch.d.ts -> temp/lib-cjs/database/fetch.d.mts Generated
+[log]: fixtures/sample/lib-cjs/database/fetch.d.ts.map - copy
+[log]: fixtures/sample/lib-cjs/database/fetch.d.ts.map -> temp/lib-cjs/database/fetch.d.mts.map Generated
+[log]: fixtures/sample/lib-cjs/database/fetch.js -> temp/lib-cjs/database/fetch.mjs Generated
+[log]: fixtures/sample/lib-cjs/database/fetch.js.map - copy
+[log]: fixtures/sample/lib-cjs/database/fetch.js.map -> temp/lib-cjs/database/fetch.mjs.map Generated
+[log]: fixtures/sample/lib-cjs/database/index.d.ts -> temp/lib-cjs/database/index.d.mts Generated
+[log]: fixtures/sample/lib-cjs/database/index.d.ts.map - copy
+[log]: fixtures/sample/lib-cjs/database/index.d.ts.map -> temp/lib-cjs/database/index.d.mts.map Generated
+[log]: fixtures/sample/lib-cjs/database/index.js -> temp/lib-cjs/database/index.mjs Generated
+[log]: fixtures/sample/lib-cjs/database/index.js.map - copy
+[log]: fixtures/sample/lib-cjs/database/index.js.map -> temp/lib-cjs/database/index.mjs.map Generated
+[log]: fixtures/sample/lib-cjs/index.d.ts -> temp/lib-cjs/index.d.mts Generated
+[log]: fixtures/sample/lib-cjs/index.d.ts.map - copy
+[log]: fixtures/sample/lib-cjs/index.d.ts.map -> temp/lib-cjs/index.d.mts.map Generated
+[log]: fixtures/sample/lib-cjs/index.js -> temp/lib-cjs/index.mjs Generated
+[log]: fixtures/sample/lib-cjs/index.js.map - copy
+[log]: fixtures/sample/lib-cjs/index.js.map -> temp/lib-cjs/index.mjs.map Generated
+[log]: fixtures/sample/lib-cjs/lookup.d.ts -> temp/lib-cjs/lookup.d.mts Generated
+[log]: fixtures/sample/lib-cjs/lookup.d.ts.map - copy
+[log]: fixtures/sample/lib-cjs/lookup.d.ts.map -> temp/lib-cjs/lookup.d.mts.map Generated
+[log]: fixtures/sample/lib-cjs/lookup.js -> temp/lib-cjs/lookup.mjs Generated
+[log]: fixtures/sample/lib-cjs/lookup.js.map - copy
+[log]: fixtures/sample/lib-cjs/lookup.js.map -> temp/lib-cjs/lookup.mjs.map Generated
+[log]: fixtures/sample/lib-cjs/types.d.ts -> temp/lib-cjs/types.d.mts Generated
+[log]: fixtures/sample/lib-cjs/types.d.ts.map - copy
+[log]: fixtures/sample/lib-cjs/types.d.ts.map -> temp/lib-cjs/types.d.mts.map Generated
+[log]: fixtures/sample/lib-cjs/types.js -> temp/lib-cjs/types.mjs Generated
+[log]: fixtures/sample/lib-cjs/types.js.map - copy
+[log]: fixtures/sample/lib-cjs/types.js.map -> temp/lib-cjs/types.mjs.map Generated
 [log]: fixtures/sample/lib/app.d.ts -> temp/lib/app.d.mts Generated
 [log]: fixtures/sample/lib/app.d.ts.map - copy
 [log]: fixtures/sample/lib/app.d.ts.map -> temp/lib/app.d.mts.map Generated
@@ -263,6 +300,7 @@ exports[`app > run (actual) [ '.', '--root=fixtures/sample' ] 1`] = `
 [log]: fixtures/sample/src/index.ts - copy
 [log]: fixtures/sample/src/lookup.ts - copy
 [log]: fixtures/sample/src/types.ts - copy
+[log]: fixtures/sample/tsconfig.cjs.json - copy
 [log]: fixtures/sample/tsconfig.json - copy
 [warn]: 
 [error]: 
@@ -289,12 +327,13 @@ exports[`app > run error '--help' 1`] = `
 [error]: 
 [stdout]: Usage: ts2mjs [options] <files...>
 [stdout]: 
-[stdout]: Rename ESM .js files to .mjs
+[stdout]: Rename ESM .js files to .mjs (or .cjs if --cjs options is used)
 [stdout]: 
 [stdout]: Arguments:
 [stdout]:   files                 The files to rename.
 [stdout]: 
 [stdout]: Options:
+[stdout]:   --cjs                 Files are renamed to .cjs.
 [stdout]:   -o, --output <dir>    The output directory.
 [stdout]:   --cwd <dir>           The current working directory.
 [stdout]:   --root <dir>          The root directory.

src/__snapshots__/processFile.test.ts.snap

@@ -7,12 +7,25 @@ export { fetchEntity } from './database/index.mjs';
 //# sourceMappingURL=index.d.mts.map"
 `;
 
+exports[`processFile > processFile 'sample/lib/index.d.ts' 2`] = `
+"export { PrimeNumber, Tuple, GUID, AddressGuid, Address, PhoneNumberGuid, PhoneNumber, PersonGuid, Person, Annotation, } from './types.mjs';
+export { lookUpPerson } from './lookup.mjs';
+export { fetchEntity } from './database/index.mjs';
+//# sourceMappingURL=index.d.cts.map"
+`;
+
 exports[`processFile > processFile 'sample/lib/index.js' 1`] = `
 "export { lookUpPerson } from './lookup.mjs';
 export { fetchEntity } from './database/index.mjs';
 //# sourceMappingURL=index.mjs.map"
 `;
 
+exports[`processFile > processFile 'sample/lib/index.js' 2`] = `
+"export { lookUpPerson } from './lookup.mjs';
+export { fetchEntity } from './database/index.mjs';
+//# sourceMappingURL=index.cjs.map"
+`;
+
 exports[`processFile > processFile allowJsOutsideOfRoot 'sample/lib/database/fetch.d.ts' 1`] = `
 "import { Entity, GUID } from '../../../../../fixtures/sample/lib/types.js';
 export declare function fetchEntity<T extends Entity>(guid: GUID): Promise<T | undefined>;

src/app.ts

@@ -53,6 +53,7 @@ interface CliOptions {
     dryRun?: boolean;
     verbose?: boolean;
     enforceRoot?: boolean;
+    cjs?: boolean;
 }
 
 export interface AppLogger {
@@ -66,8 +67,9 @@ export async function app(program = defaultCommand, logger?: AppLogger): Promise
 
     program
         .name((await getName()) || 'ts2mjs')
-        .description('Rename ESM .js files to .mjs')
+        .description('Rename ESM .js files to .mjs (or .cjs if --cjs options is used)')
         .argument('<files...>', 'The files to rename.')
+        .option('--cjs', 'Files are renamed to .cjs.')
         .option('-o, --output <dir>', 'The output directory.')
         .option('--cwd <dir>', 'The current working directory.')
         .option('--root <dir>', 'The root directory.')
@@ -101,6 +103,7 @@ export async function app(program = defaultCommand, logger?: AppLogger): Promise
                 cwd: optionsCli.cwd,
                 dryRun: optionsCli.dryRun || false,
                 output: optionsCli.output,
+                cjs: optionsCli.cjs,
                 progress: log,
                 warning,
                 root: optionsCli.root,