Custom tsconfig path for the build command, default to tsconfig.build.json and fallback to tsconfig.json

.changeset/proud-hairs-promise.md

@@ -0,0 +1,6 @@
+---
+'bob-the-bundler': major
+---
+
+Custom tsconfig path for the build command, default to `tsconfig.build.json` and fallback to
+`tsconfig.json`.

src/commands/build.ts

@@ -17,6 +17,8 @@ import { presetFields, presetFieldsESM } from './bootstrap.js';
 
 export const DIST_DIR = 'dist';
 
+export const DEFAULT_TS_BUILD_CONFIG = 'tsconfig.build.json';
+
 interface PackageInfo {
   packagePath: string;
   cwd: string;
@@ -65,10 +67,18 @@ function assertTypeScriptBuildResult(result: ExecaReturnValue) {
   }
 }
 
-async function buildTypeScript(buildPath: string, options: { incremental?: boolean } = {}) {
+async function buildTypeScript(
+  buildPath: string,
+  options: { cwd: string; tsconfig?: string; incremental?: boolean },
+) {
+  let tsconfig = options.tsconfig;
+  if (!tsconfig && (await fse.exists(join(options.cwd, DEFAULT_TS_BUILD_CONFIG)))) {
+    tsconfig = join(options.cwd, DEFAULT_TS_BUILD_CONFIG);
+  }
   assertTypeScriptBuildResult(
     await execa('npx', [
       'tsc',
+      ...(tsconfig ? ['--project', tsconfig] : []),
       ...compilerOptionsToArgs(typeScriptCompilerOptions('esm')),
       ...(options.incremental ? ['--incremental'] : []),
       '--outDir',
@@ -79,6 +89,7 @@ async function buildTypeScript(buildPath: string, options: { incremental?: boole
   assertTypeScriptBuildResult(
     await execa('npx', [
       'tsc',
+      ...(tsconfig ? ['--project', tsconfig] : []),
       ...compilerOptionsToArgs(typeScriptCompilerOptions('cjs')),
       ...(options.incremental ? ['--incremental'] : []),
       '--outDir',
@@ -90,6 +101,7 @@ async function buildTypeScript(buildPath: string, options: { incremental?: boole
 export const buildCommand = createCommand<
   {},
   {
+    tsconfig?: string;
     incremental?: boolean;
   }
 >(api => {
@@ -100,13 +112,17 @@ export const buildCommand = createCommand<
     describe: 'Build',
     builder(yargs) {
       return yargs.options({
+        tsconfig: {
+          describe: `Which tsconfig file to use when building TypeScript. By default bob will use ${DEFAULT_TS_BUILD_CONFIG} if it exists, otherwise the TSC's default.`,
+          type: 'string',
+        },
         incremental: {
           describe: 'Better performance by building only packages that had changes.',
           type: 'boolean',
         },
       });
     },
-    async handler({ incremental }) {
+    async handler({ tsconfig, incremental }) {
       const cwd = process.cwd();
       const rootPackageJSON = await getRootPackageJSON();
       const workspaces = await getWorkspaces(rootPackageJSON);
@@ -118,7 +134,7 @@ export const buildCommand = createCommand<
         if (!incremental) {
           await fse.remove(buildPath);
         }
-        await buildTypeScript(buildPath, { incremental });
+        await buildTypeScript(buildPath, { cwd, tsconfig, incremental });
         const pkg = await fse.readJSON(resolve(cwd, 'package.json'));
         const fullName: string = pkg.name;
 
@@ -155,7 +171,7 @@ export const buildCommand = createCommand<
       if (!incremental) {
         await fse.remove(bobBuildPath);
       }
-      await buildTypeScript(bobBuildPath, { incremental });
+      await buildTypeScript(bobBuildPath, { cwd, tsconfig, incremental });
 
       await Promise.all(
         packageInfoList.map(({ cwd, pkg, fullName }) =>

test/__fixtures__/tsconfig-build-json/README.md

@@ -0,0 +1 @@
+Hello!

test/__fixtures__/tsconfig-build-json/package.json

@@ -0,0 +1,46 @@
+{
+  "name": "tsconfig-build-json",
+  "type": "module",
+  "main": "dist/cjs/index.js",
+  "module": "dist/esm/index.js",
+  "exports": {
+    ".": {
+      "require": {
+        "types": "./dist/typings/index.d.cts",
+        "default": "./dist/cjs/index.js"
+      },
+      "import": {
+        "types": "./dist/typings/index.d.ts",
+        "default": "./dist/esm/index.js"
+      },
+      "default": {
+        "types": "./dist/typings/index.d.ts",
+        "default": "./dist/esm/index.js"
+      }
+    },
+    "./*": {
+      "require": {
+        "types": "./dist/typings/*.d.cts",
+        "default": "./dist/cjs/*.js"
+      },
+      "import": {
+        "types": "./dist/typings/*.d.ts",
+        "default": "./dist/esm/*.js"
+      },
+      "default": {
+        "types": "./dist/typings/*.d.ts",
+        "default": "./dist/esm/*.js"
+      }
+    },
+    "./package.json": "./package.json",
+    "./style.css": "./dist/esm/style.css"
+  },
+  "typings": "dist/typings/index.d.ts",
+  "publishConfig": {
+    "directory": "dist",
+    "access": "public"
+  },
+  "typescript": {
+    "definition": "dist/typings/index.d.ts"
+  }
+}

test/__fixtures__/tsconfig-build-json/src/index.ts

@@ -0,0 +1,3 @@
+export const hello = 1;
+
+export default 'there';

test/__fixtures__/tsconfig-build-json/tsconfig.build.json

@@ -0,0 +1,7 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "module": "ESNext",
+    "declaration": false
+  }
+}

test/__fixtures__/tsconfig-build-json/tsconfig.json

@@ -0,0 +1,8 @@
+{
+  "compilerOptions": {
+    "module": "ESNext",
+    "declaration": true,
+    "skipLibCheck": true,
+    "outDir": "dist"
+  }
+}

test/integration.spec.ts

@@ -636,3 +636,84 @@ it('can build a monorepo pnpm project', async () => {
     cwd: path.resolve(fixturesFolder, 'simple-monorepo-pnpm'),
   });
 });
+
+it('can bundle a tsconfig-build-json project', async () => {
+  await fse.remove(path.resolve(fixturesFolder, 'tsconfig-build-json', 'dist'));
+
+  const result = await execa('node', [binaryFolder, 'build'], {
+    cwd: path.resolve(fixturesFolder, 'tsconfig-build-json'),
+  });
+  expect(result.exitCode).toEqual(0);
+
+  const baseDistPath = path.resolve(fixturesFolder, 'tsconfig-build-json', 'dist');
+  await expect(fse.readFile(path.resolve(baseDistPath, 'package.json'), 'utf8')).resolves
+    .toMatchInlineSnapshot(`
+    {
+      "name": "tsconfig-build-json",
+      "main": "cjs/index.js",
+      "module": "esm/index.js",
+      "typings": "typings/index.d.ts",
+      "typescript": {
+        "definition": "typings/index.d.ts"
+      },
+      "type": "module",
+      "exports": {
+        ".": {
+          "require": {
+            "types": "./typings/index.d.cts",
+            "default": "./cjs/index.js"
+          },
+          "import": {
+            "types": "./typings/index.d.ts",
+            "default": "./esm/index.js"
+          },
+          "default": {
+            "types": "./typings/index.d.ts",
+            "default": "./esm/index.js"
+          }
+        },
+        "./*": {
+          "require": {
+            "types": "./typings/*.d.cts",
+            "default": "./cjs/*.js"
+          },
+          "import": {
+            "types": "./typings/*.d.ts",
+            "default": "./esm/*.js"
+          },
+          "default": {
+            "types": "./typings/*.d.ts",
+            "default": "./esm/*.js"
+          }
+        },
+        "./package.json": "./package.json",
+        "./style.css": "./esm/style.css"
+      }
+    }
+  `);
+  await expect(
+    fse.readFile(path.resolve(baseDistPath, 'README.md'), 'utf8'),
+  ).resolves.toMatchInlineSnapshot('Hello!');
+  await expect(fse.readFile(path.resolve(baseDistPath, 'cjs', 'index.js'), 'utf8')).resolves
+    .toMatchInlineSnapshot(`
+    "use strict";
+    exports.__esModule = true;
+    exports.hello = void 0;
+    exports.hello = 1;
+    exports["default"] = 'there';
+  `);
+  await expect(fse.readFile(path.resolve(baseDistPath, 'esm', 'index.js'), 'utf8')).resolves
+    .toMatchInlineSnapshot(`
+    export var hello = 1;
+    export default 'there';
+  `);
+
+  // because the tsconfig.build.json has `declaration: false`
+  await expect(fse.stat(path.resolve(baseDistPath, 'typings', 'index.d.ts'))).rejects.toThrowError(
+    'ENOENT: no such file or directory',
+  );
+
+  await execa('node', [binaryFolder, 'check'], {
+    cwd: path.resolve(fixturesFolder, 'simple'),
+  });
+});