exports field and worker bundles (#435)

.changeset/afraid-experts-attack.md

@@ -0,0 +1,5 @@
+---
+"@preconstruct/cli": patch
+---
+
+Added experimental `exports` flag. See the docs at the `exports` section of https://preconstruct.tools/configuration.

package.json

@@ -67,7 +67,7 @@
     "normalize-path": "^3.0.0",
     "outdent": "^0.7.1",
     "prettier": "^2.1.2",
-    "typescript": "^4.5.2"
+    "typescript": "^4.7.4"
   },
   "jest": {
     "reporters": [

packages/cli/package.json

@@ -2,13 +2,7 @@
   "name": "@preconstruct/cli",
   "version": "2.1.7",
   "description": "Dev and build your code painlessly in monorepos",
-  "files": [
-    "bin.js",
-    "cli",
-    "worker",
-    "!**/*.d.ts",
-    "dist"
-  ],
+  "files": ["bin.js", "cli", "worker", "!**/*.d.ts", "dist"],
   "bin": {
     "preconstruct": "./bin.js"
   },
@@ -54,10 +48,7 @@
     "v8-compile-cache": "^2.1.1"
   },
   "preconstruct": {
-    "entrypoints": [
-      "cli",
-      "worker"
-    ]
+    "entrypoints": ["cli", "worker"]
   },
   "devDependencies": {
     "escape-string-regexp": "^4.0.0",

packages/cli/src/__tests__/dev.ts

@@ -2,7 +2,7 @@ import spawn from "spawndamnit";
 import path from "path";
 import * as fs from "fs-extra";
 import * as realFs from "fs";
-import { js, testdir, typescriptFixture } from "../../test-utils";
+import { getFiles, js, testdir, typescriptFixture } from "../../test-utils";
 import dev from "../dev";
 import normalizePath from "normalize-path";
 import escapeStringRegexp from "escape-string-regexp";
@@ -305,3 +305,50 @@ test("typescript with typeScriptProxyFileWithImportEqualsRequireAndExportEquals"
           "
         `);
 });
+
+test("exports field with worker condition", async () => {
+  let tmpPath = realFs.realpathSync.native(
+    await testdir({
+      "package.json": JSON.stringify({
+        name: "@something/blah",
+        main: "dist/something-blah.cjs.js",
+        module: "dist/something-blah.esm.js",
+        exports: {
+          ".": {
+            module: {
+              worker: "./dist/something-blah.worker.esm.js",
+              default: "./dist/something-blah.esm.js",
+            },
+            default: "./dist/something-blah.cjs.js",
+          },
+          "./package.json": "./package.json",
+        },
+        preconstruct: {
+          exports: {
+            envConditions: ["worker"],
+          },
+          ___experimentalFlags_WILL_CHANGE_IN_PATCH: {
+            exports: true,
+          },
+        },
+      }),
+      "src/index.js": "console.log(1)",
+    })
+  );
+  await dev(tmpPath);
+  const files = await getFiles(tmpPath, [
+    "dist/**",
+    "!dist/something-blah.cjs.js",
+  ]);
+  expect(files).toMatchInlineSnapshot(`
+    ⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯ dist/something-blah.esm.js, dist/something-blah.worker.esm.js ⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯
+    console.log(1)
+  `);
+  await Promise.all(
+    Object.keys(files).map(async (filename) => {
+      expect(await fs.realpath(path.join(tmpPath, filename))).toEqual(
+        path.join(tmpPath, "src/index.js")
+      );
+    })
+  );
+});