feat: support import attributes.

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@knighted/duel",
-  "version": "1.0.0-rc.5",
+  "version": "1.0.0-rc.6",
   "description": "TypeScript dual packages.",
   "type": "module",
   "main": "dist",
@@ -53,10 +53,11 @@
     "eslint": "^8.45.0",
     "eslint-plugin-n": "^16.0.1",
     "prettier": "^3.0.1",
-    "typescript": "^5.2.0-dev.20230727"
+    "typescript": "^5.2.0-dev.20230727",
+    "vite": "^4.4.8"
   },
   "dependencies": {
-    "@knighted/specifier": "^1.0.0-rc.0",
+    "@knighted/specifier": "^1.0.0-rc.1",
     "glob": "^10.3.3",
     "read-pkg-up": "^10.0.0"
   },

src/duel.js

@@ -48,12 +48,11 @@ const duel = async args => {
     const isCjsBuild = originalType !== 'commonjs'
     const targetExt = isCjsBuild ? '.cjs' : '.mjs'
     const hex = randomBytes(4).toString('hex')
-    const getOverrideTsConfig = dualOutDir => {
+    const getOverrideTsConfig = () => {
       return {
         ...tsconfig,
         compilerOptions: {
           ...tsconfig.compilerOptions,
-          outDir: dualOutDir,
           module: 'NodeNext',
           moduleResolution: 'NodeNext',
         },
@@ -64,9 +63,9 @@ const duel = async args => {
         configPath,
         dirs
           ? isCjsBuild
-            ? join(projectDir, outDir, 'esm')
-            : join(projectDir, outDir, 'cjs')
-          : undefined,
+            ? join(absoluteOutDir, 'esm')
+            : join(absoluteOutDir, 'cjs')
+          : absoluteOutDir,
       )
     }
     const updateSpecifiersAndFileExtensions = async filenames => {
@@ -140,8 +139,11 @@ const duel = async args => {
       })
 
       const dualConfigPath = join(paraTempDir, 'tsconfig.json')
-      const dualOutDir = isCjsBuild ? join(outDir, 'cjs') : join(outDir, 'esm')
-      const tsconfigDual = getOverrideTsConfig(dualOutDir)
+      const absoluteDualOutDir = join(
+        paraTempDir,
+        isCjsBuild ? join(outDir, 'cjs') : join(outDir, 'esm'),
+      )
+      const tsconfigDual = getOverrideTsConfig()
 
       await writeFile(dualConfigPath, JSON.stringify(tsconfigDual))
       await writeFile(
@@ -158,14 +160,16 @@ const duel = async args => {
       const startTime = performance.now()
 
       try {
-        await Promise.all([runPrimaryBuild(), runBuild(dualConfigPath)])
+        await Promise.all([
+          runPrimaryBuild(),
+          runBuild(dualConfigPath, absoluteDualOutDir),
+        ])
         success = true
       } catch ({ message }) {
         logError(message)
       }
 
       if (success) {
-        const absoluteDualOutDir = join(paraTempDir, dualOutDir)
         const filenames = await glob(`${absoluteDualOutDir}/**/*{.js,.d.ts}`, {
           ignore: 'node_modules/**',
         })
@@ -194,8 +198,11 @@ const duel = async args => {
 
       if (success) {
         const dualConfigPath = join(projectDir, `tsconfig.${hex}.json`)
-        const dualOutDir = isCjsBuild ? join(outDir, 'cjs') : join(outDir, 'esm')
-        const tsconfigDual = getOverrideTsConfig(dualOutDir)
+        const absoluteDualOutDir = join(
+          projectDir,
+          isCjsBuild ? join(outDir, 'cjs') : join(outDir, 'esm'),
+        )
+        const tsconfigDual = getOverrideTsConfig()
         const pkgRename = 'package.json.bak'
 
         /**
@@ -217,7 +224,7 @@ const duel = async args => {
         // Build dual
         log('Starting dual build...')
         try {
-          await runBuild(dualConfigPath)
+          await runBuild(dualConfigPath, absoluteDualOutDir)
         } catch ({ message }) {
           success = false
           logError(message)
@@ -229,7 +236,6 @@ const duel = async args => {
         await rename(join(pkgDir, pkgRename), pkg.path)
 
         if (success) {
-          const absoluteDualOutDir = join(projectDir, dualOutDir)
           const filenames = await glob(`${absoluteDualOutDir}/**/*{.js,.d.ts}`, {
             ignore: 'node_modules/**',
           })

test/__fixtures__/plain/package.json

@@ -0,0 +1,4 @@
+{
+  "version": "0.0.0",
+  "type": "module"
+}

test/__fixtures__/plain/src/enforce.ts

@@ -0,0 +1 @@
+export const enforce = 'post'

test/__fixtures__/plain/src/index.ts

@@ -0,0 +1,10 @@
+import { enforce } from './enforce.js'
+
+import type { Plugin } from 'vite' assert { 'resolution-mode': 'import' }
+
+export const plugin = (): Plugin => {
+  return {
+    name: 'plugin',
+    enforce
+  }
+}

test/__fixtures__/plain/tsconfig.json

@@ -0,0 +1,12 @@
+{
+  "compilerOptions": {
+    "target": "ESNext",
+    "module": "NodeNext",
+    "esModuleInterop": true,
+    "declaration": true,
+    "strict": false,
+    "outDir": "dist",
+    "lib": ["DOM", "ES2015"]
+  },
+  "include": ["src"]
+}

test/integration.js

@@ -10,10 +10,12 @@ import { duel } from '../src/duel.js'
 
 const __filename = fileURLToPath(import.meta.url)
 const __dirname = dirname(__filename)
+const plain = resolve(__dirname, '__fixtures__/plain')
 const project = resolve(__dirname, '__fixtures__/project')
 const parallel = resolve(__dirname, '__fixtures__/parallel')
 const esmProject = resolve(__dirname, '__fixtures__/esmProject')
 const cjsProject = resolve(__dirname, '__fixtures__/cjsProject')
+const plainDist = join(plain, 'dist')
 const proDist = join(project, 'dist')
 const paraDist = join(parallel, 'dist')
 const esmDist = join(esmProject, 'dist')
@@ -30,6 +32,7 @@ describe('duel', () => {
     await rmDist(cjsDist)
     await rmDist(errDist)
     await rmDist(paraDist)
+    await rmDist(plainDist)
   })
 
   it('prints options help', async t => {
@@ -161,34 +164,47 @@ describe('duel', () => {
     assert.equal(statusEsm, 0)
   })
 
-  it('supports running builds in parallel', async t => {
+  it('supports both builds output to directories', async t => {
     const spy = t.mock.method(global.console, 'log')
 
     t.after(async () => {
-      await rmDist(paraDist)
+      await rmDist(proDist)
     })
-    await duel(['-p', parallel, '-k', parallel, '-l', '-d'])
+    await duel(['-p', 'test/__fixtures__/project/tsconfig.json', '-k', project, '-d'])
 
     assert.ok(
       spy.mock.calls[3].arguments[0].startsWith('Successfully created a dual CJS build'),
     )
-    assert.ok(existsSync(resolve(paraDist, 'esm/index.js')))
-    assert.ok(existsSync(resolve(paraDist, 'cjs/index.cjs')))
+    assert.ok(existsSync(resolve(proDist, 'esm/index.js')))
+    assert.ok(existsSync(resolve(proDist, 'cjs/index.cjs')))
   })
 
-  it('supports both builds output to directories', async t => {
+  it('supports import attributes and ts import assertion resolution mode', async t => {
     const spy = t.mock.method(global.console, 'log')
 
     t.after(async () => {
-      await rmDist(proDist)
+      await rmDist(plainDist)
     })
-    await duel(['-p', 'test/__fixtures__/project/tsconfig.json', '-k', project, '-d'])
+    await duel(['-p', plain, '-k', plain])
+
+    assert.ok(
+      spy.mock.calls[2].arguments[0].startsWith('Successfully created a dual CJS build'),
+    )
+  })
+
+  it('supports running builds in parallel', async t => {
+    const spy = t.mock.method(global.console, 'log')
+
+    t.after(async () => {
+      await rmDist(paraDist)
+    })
+    await duel(['-p', parallel, '-k', parallel, '-l', '-d'])
 
     assert.ok(
       spy.mock.calls[3].arguments[0].startsWith('Successfully created a dual CJS build'),
     )
-    assert.ok(existsSync(resolve(proDist, 'esm/index.js')))
-    assert.ok(existsSync(resolve(proDist, 'cjs/index.cjs')))
+    assert.ok(existsSync(resolve(paraDist, 'esm/index.js')))
+    assert.ok(existsSync(resolve(paraDist, 'cjs/index.cjs')))
   })
 
   it('works as a cli script', async () => {