feat(js/openinference-core): Port build process to vite, advertise esm builds

js/packages/openinference-core/package.json

@@ -3,13 +3,21 @@
   "version": "0.3.2",
   "private": false,
   "main": "dist/src/index.js",
-  "module": "dist/esm/index.js",
+  "module": "dist/esm/index.mjs",
   "esnext": "dist/esnext/index.js",
-  "types": "dist/src/index.d.ts",
+  "types": "./dist/src/index.d.ts",
+  "exports": {
+    ".": {
+      "types": "./dist/src/index.d.ts",
+      "import": "./dist/esm/index.mjs",
+      "require": "./dist/src/index.js",
+      "default": "./dist/src/index.js"
+    }
+  },
   "description": "OpenInference Core provides utilities shared by all OpenInference SDK packages.",
   "scripts": {
     "prebuild": "rimraf dist",
-    "build": "tsc --build tsconfig.json tsconfig.esm.json tsconfig.esnext.json",
+    "build": "vite build && tsc --emitDeclarationOnly --outDir dist && rimraf dist/test dist/tsconfig.tsbuildinfo",
     "type:check": "tsc --noEmit",
     "test": "jest"
   },
@@ -34,8 +42,8 @@
   },
   "dependencies": {
     "@arizeai/openinference-semantic-conventions": "workspace:*",
-    "@opentelemetry/core": "^1.25.1",
-    "@opentelemetry/api": "^1.9.0"
+    "@opentelemetry/api": "^1.9.0",
+    "@opentelemetry/core": "^1.25.1"
   },
   "devDependencies": {
     "@opentelemetry/context-async-hooks": "^1.25.1",
@@ -45,6 +53,8 @@
     "@opentelemetry/semantic-conventions": "^1.19.0",
     "@types/jest": "^29.5.12",
     "@types/node": "^20.14.11",
-    "jest": "^29.7.0"
+    "glob": "^11.0.0",
+    "jest": "^29.7.0",
+    "vite": "^6.0.2"
   }
 }

js/packages/openinference-core/src/trace/index.ts

@@ -1,3 +1,3 @@
 export * from "./contextAttributes";
-export * from "./types";
+export type * from "./types";
 export * from "./trace-config";

js/packages/openinference-core/src/trace/trace-config/index.ts

@@ -1,4 +1,4 @@
-export { TraceConfigOptions } from "./types";
+export type { TraceConfigOptions } from "./types";
 export {
   OPENINFERENCE_BASE64_IMAGE_MAX_LENGTH,
   OPENINFERENCE_HIDE_EMBEDDING_VECTORS,

js/packages/openinference-core/vite.config.mts

@@ -0,0 +1,49 @@
+import path, { resolve } from "path";
+import { defineConfig } from "vite";
+import { globSync } from "glob";
+import { fileURLToPath } from "url";
+
+export default defineConfig({
+  build: {
+    lib: {
+      // Map every source file as an entry point so that they are not bundled, each file becomes its
+      // own chunk essentially.
+      // see https://rollupjs.org/configuration-options/#input
+      entry: Object.fromEntries(
+        globSync("src/**/*.ts").map((file) => [
+          // This remove `src/` as well as the file extension from each
+          // file, so e.g. src/nested/foo.js becomes nested/foo
+          path.relative(
+            "src",
+            file.slice(0, file.length - path.extname(file).length),
+          ),
+          // This expands the relative paths to absolute paths, so e.g.
+          // src/nested/foo becomes /project/src/nested/foo.js
+          fileURLToPath(new URL(file, import.meta.url)),
+        ]),
+      ),
+      formats: ["es", "cjs"],
+    },
+    minify: false,
+    rollupOptions: {
+      output: [
+        {
+          format: "es",
+          dir: resolve(__dirname, "dist", "esm"),
+        },
+        {
+          format: "esm",
+          dir: resolve(__dirname, "dist", "esnext"),
+          entryFileNames: "[name].js",
+        },
+        {
+          format: "cjs",
+          dir: resolve(__dirname, "dist", "src"),
+        },
+      ],
+      // make sure to externalize deps that shouldn't be bundled
+      // into your library
+      external: ["@opentelemetry/api", "@opentelemetry/core"],
+    },
+  },
+});