fix(api): fix unreachable @opentelemetry/api/experimental entry

api/CHANGELOG.md

@@ -5,8 +5,7 @@ All notable changes to this project will be documented in this file.
 ## Unreleased
 
 * feat(api): add SugaredTracer for functions not defined in the spec
-
-## Unreleased
+* fix(api): fix unreachable @opentelemetry/api/experimental entry [#4446](https://github.com/open-telemetry/opentelemetry-js/pull/4446) @legendecas
 
 ## 1.7.0
 

api/package.json

@@ -20,10 +20,10 @@
       "default": "./build/src/index.js"
     },
     "./experimental": {
-      "module": "./build/esm/experimental.js",
-      "esnext": "./build/esnext/experimental.js",
-      "types": "./build/src/experimental.d.ts",
-      "default": "./build/src/experimental.js"
+      "module": "./build/esm/experimental/index.js",
+      "esnext": "./build/esnext/experimental/index.js",
+      "types": "./build/src/experimental/index.d.ts",
+      "default": "./build/src/experimental/index.js"
     }
   },
   "repository": "open-telemetry/opentelemetry-js",

eslint.base.js

@@ -5,10 +5,10 @@ module.exports = {
     "node",
     "prettier"
   ],
-  extends: ["eslint:recommended", "plugin:@typescript-eslint/recommended", "plugin:prettier/recommended"],
+  extends: ["eslint:recommended", "plugin:prettier/recommended"],
   parser: "@typescript-eslint/parser",
   parserOptions: {
-    "project": "./tsconfig.json"
+    "project": null,
   },
   rules: {
     "quotes": ["error", "single", { "avoidEscape": true }],
@@ -29,6 +29,11 @@ module.exports = {
   overrides: [
     {
       files: ['*.ts'],
+      // Enable typescript-eslint for ts files.
+      extends: ["eslint:recommended", "plugin:@typescript-eslint/recommended", "plugin:prettier/recommended"],
+      parserOptions: {
+        "project": "./tsconfig.json"
+      },
       rules: {
         "@typescript-eslint/no-floating-promises": "error",
         "@typescript-eslint/no-this-alias": "off",
@@ -54,6 +59,11 @@ module.exports = {
     },
     {
       files: ["test/**/*.ts"],
+      // Enable typescript-eslint for ts files.
+      extends: ["eslint:recommended", "plugin:@typescript-eslint/recommended", "plugin:prettier/recommended"],
+      parserOptions: {
+        "project": "./tsconfig.json"
+      },
       rules: {
         "no-empty": "off",
         "@typescript-eslint/ban-ts-ignore": "off",

integration-tests/api/.eslintrc.js

@@ -0,0 +1,24 @@
+/*
+ * Copyright The OpenTelemetry Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+module.exports = {
+  env: {
+    mocha: true,
+    commonjs: true,
+    node: true,
+    browser: true,
+  },
+  ...require('../../eslint.base.js'),
+};

integration-tests/api/README.md

@@ -0,0 +1,10 @@
+# `opentelemetry/integration-tests-api`
+
+This is an integration test suite for `@opentelemetry/api` that verifies the
+api package works as expected when being imported.
+
+## Test
+
+```sh
+npm run test
+```

integration-tests/api/package.json

@@ -0,0 +1,40 @@
+{
+  "name": "@opentelemetry/integration-tests-api",
+  "version": "1.20.0",
+  "private": true,
+  "publishConfig": {
+    "access": "restricted"
+  },
+  "description": "Verifies @opentelemetry/api in integration tests",
+  "author": "OpenTelemetry Authors",
+  "homepage": "https://github.com/open-telemetry/opentelemetry-js/tree/main/integration-tests/api",
+  "license": "Apache-2.0",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/open-telemetry/opentelemetry-js.git"
+  },
+  "bugs": {
+    "url": "https://github.com/open-telemetry/opentelemetry-js/issues"
+  },
+  "engines": {
+    "node": ">=14"
+  },
+  "scripts": {
+    "compile": "cross-var lerna run version --scope $npm_package_name --include-dependencies",
+    "pretest": "npm run compile",
+    "test": "nyc mocha test/**/*.test.js",
+    "codecov": "nyc report --reporter=json && codecov -f coverage/*.json -p ../../",
+    "lint": "eslint . --ext .js",
+    "lint:fix": "eslint . --ext .js --fix"
+  },
+  "devDependencies": {
+    "@opentelemetry/api": "^1.0.0",
+    "@types/mocha": "9.1.1",
+    "@types/node": "18.6.5",
+    "codecov": "3.8.3",
+    "cross-var": "1.1.0",
+    "lerna": "6.6.2",
+    "mocha": "10.0.0",
+    "nyc": "15.1.0"
+  }
+}

integration-tests/api/test/api-entries.test.js

@@ -0,0 +1,48 @@
+/*
+ * Copyright The OpenTelemetry Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+const assert = require('assert');
+
+// TypeScript v4.4.4 doesn't support `node16` or `nodenext` in
+// [Module Resolution](https://www.typescriptlang.org/tsconfig#moduleResolution)
+// which is required for typescript to resolve the `package.json#exports`
+// entries.
+// Additionally, using `node16` or `nodenext` in `tsconfig.json#moduleResolution`
+// requires the TypeScript to generate ESModule outputs. This is a breaking
+// change for CJS users.
+// So we have to use plain JavaScript to verity the `package.json#exports` here.
+
+describe('@opentelemetry/api entries', () => {
+  it('should import root entry', async () => {
+    const mod = await import('@opentelemetry/api');
+    assert.ok(mod.trace != null);
+  });
+
+  it('should require root entry', () => {
+    const mod = require('@opentelemetry/api');
+    assert.ok(mod.trace != null);
+  });
+
+  it('should import experimental entry', async () => {
+    const mod = await import('@opentelemetry/api/experimental');
+    assert.ok(mod.wrapTracer != null);
+  });
+
+  it('should require experimental entry', () => {
+    const mod = require('@opentelemetry/api/experimental');
+    assert.ok(mod.wrapTracer != null);
+  });
+});