esbuild.config.js

// Copyright DataStax, Inc.
//
// 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
//
// http://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.

import { build } from "esbuild";
import { fileURLToPath } from "url";
import { dirname, resolve } from "path";
import fs from "fs";

const __filename = fileURLToPath(import.meta.url);
const __dirname = dirname(__filename);

// Check if watch mode is enabled
const isWatch = process.argv.includes("--watch");
// Check if production mode is enabled
const isProd = process.argv.includes("--prod");

const buildOptions = {
  entryPoints: ["index.ts"],
  bundle: true,
  platform: "node",
  target: "node18",
  format: "esm",
  outfile: "build/index.js",
  banner: {
    js: "#!/usr/bin/env node",
  },
  external: [
    // External packages that should not be bundled
    "@datastax/astra-db-ts",
    "@modelcontextprotocol/sdk",
    "jsonschema",
    "dotenv",
  ],
  minify: isProd,
  sourcemap: !isProd,
  logLevel: "info",
};

async function runBuild() {
  try {
    if (isWatch) {
      // Watch mode
      const ctx = await build({
        ...buildOptions,
        watch: {
          onRebuild(error, result) {
            if (error) {
              console.error("Watch build failed:", error);
            } else {
              // Make the output file executable
              fs.chmodSync("build/index.js", "755");
              console.log(
                "Watch build succeeded:",
                new Date().toLocaleTimeString()
              );
            }
          },
        },
      });

      // Make the output file executable after initial build
      fs.chmodSync("build/index.js", "755");
      console.log("Watch mode started, waiting for changes...");

      // Keep the process running
      process.stdin.on("close", () => {
        ctx.stop();
        process.exit(0);
      });
    } else {
      // One-time build
      await build(buildOptions);

      // Make the output file executable
      fs.chmodSync("build/index.js", "755");

      console.log(
        `Build completed successfully in ${
          isProd ? "production" : "development"
        } mode!`
      );
    }
  } catch (error) {
    console.error("Build failed:", error);
    process.exit(1);
  }
}

runBuild();