chore: modularize vite config

Author: Mike Valeriano

.vite/build.ts

@@ -0,0 +1,29 @@
+import type { BuildEnvironmentOptions } from "vite";
+
+export function getBuild(entryFiles: string[]): BuildEnvironmentOptions {
+  return {
+    target: "esnext",
+    lib: {
+      entry: entryFiles,
+      formats: ["es"],
+      fileName: (_, entryName) => `${entryName}.js`,
+    },
+    outDir: "./build",
+    emptyOutDir: true,
+    rollupOptions: {
+      output: {
+        preserveModules: true,
+        preserveModulesRoot: "src",
+        // this outputs bundled/internal packages to a directory named _internal
+        entryFileNames: ({ name }) => `${name.replace("node_modules/", "_internal/")}.js`,
+      },
+    },
+    minify: "terser",
+    terserOptions: {
+      compress: false,
+      format: {
+        comments: false,
+      },
+    },
+  };
+}

.vite/entries.ts

@@ -0,0 +1,12 @@
+import { glob } from "node:fs/promises";
+
+export async function getEntryFiles(): Promise<string[]> {
+  const entryFiles: string[] = [];
+  for await (const file of glob("src/**/*.ts")) {
+    if (!(file.endsWith(".test.ts") || file.endsWith(".spec.ts"))) {
+      entryFiles.push(file);
+    }
+  }
+
+  return entryFiles;
+}

.vite/optimize.ts

@@ -0,0 +1,10 @@
+import type { DepOptimizationOptions } from "vite";
+
+export function getOptimize(): DepOptimizationOptions {
+  return {
+    esbuildOptions: {
+      target: "esnext",
+      format: "esm",
+    },
+  };
+}

.vite/plugins.ts

@@ -0,0 +1,19 @@
+import nodeExternals from "rollup-plugin-node-externals";
+import type { PluginOption } from "vite";
+import tsconfigPaths from "vite-tsconfig-paths";
+
+export function getPlugins(): PluginOption[] {
+  return [
+    // externalize node builtins and configure dependencies to be externalized (or not)
+    nodeExternals({
+      // externalize dependencies in package.json
+      deps: true,
+      // devDependencies in package.json
+      devDeps: false,
+      // dependencies to be bundled
+      exclude: ["@mkvlrn/result"],
+    }),
+    // resolve tsconfig path aliases
+    tsconfigPaths(),
+  ];
+}

biome.jsonc

@@ -66,7 +66,7 @@
     {
       // test files, config files, and some scripts
       // export defaults from them, and also import from node
-      "includes": ["**/*.config.ts", "**/*.test.ts", "**/*.spec.ts", "**/scripts/**"],
+      "includes": ["**/*.config.ts", "**/*.test.ts", "**/*.spec.ts", "**/.vite/**"],
       "linter": {
         "rules": {
           "correctness": {

package-lock.json

@@ -30,7 +30,7 @@
     "prepare": "husky"
   },
   "devDependencies": {
-    "@biomejs/biome": "^2.0.0",
+    "@biomejs/biome": "^2.0.4",
     "@commitlint/cli": "^19.8.1",
     "@commitlint/config-conventional": "^19.8.1",
     "@types/node": "^24.0.3",

package.json

@@ -1,7 +1,7 @@
 /** biome-ignore-all lint/suspicious/noConsole: needed, yo */
 
-import { divide } from "~/lib/advanced-math.ts";
-import { add } from "~/lib/basic-math.ts";
+import { divide } from "~/math/advanced-math.ts";
+import { add } from "~/math/basic-math.ts";
 
 function main(): void {
   const sum = add(1, 2);

src/main.ts

@@ -1,6 +1,6 @@
 import assert from "node:assert/strict";
 import { describe, it } from "node:test";
-import { divide, multiply } from "~/lib/advanced-math.ts";
+import { divide, multiply } from "~/math/advanced-math.ts";
 
 describe("advanced-math", () => {
   describe("multiply", () => {