1 files changed, 40 insertions, 0 deletions

diff --git a/config/getEsbuildConfig.js b/config/getEsbuildConfig.js
new file mode 100644
index 0000000..b338d68
--- /dev/null
+++ b/config/getEsbuildConfig.js
@@ -0,0 +1,40 @@
+/* eslint-disable no-process-env */
+import { banner } from './buildConstants.js';
+
+/** @type {string} */
+const mode = process.env.MODE || 'development';
+
+/** @type {boolean} */
+const isDevelopment = mode === 'development';
+
+/** @type {string} */
+const modeString = JSON.stringify(mode);
+
+/**
+ * @param {import('esbuild').BuildOptions} config
+ * @param {Record<string, unknown>} [extraMetaEnvVars]
+ * @returns {import('esbuild').BuildOptions}
+ */
+export default function getEsbuildConfig(config, extraMetaEnvVars) {
+  return {
+    logLevel: 'info',
+    bundle: true,
+    treeShaking: !isDevelopment,
+    minify: !isDevelopment,
+    banner: {
+      js: banner,
+    },
+    ...config,
+    sourcemap: isDevelopment ? (config.sourcemap || true) : false,
+    define: {
+      'process.env.NODE_ENV': modeString,
+      'process.env.MODE': modeString,
+      'import.meta.env': JSON.stringify({
+        DEV: isDevelopment,
+        MODE: mode,
+        PROD: !isDevelopment,
+        ...extraMetaEnvVars,
+      }),
+    },
+  };
+}