sveltekit-lambda-adapter/dist/index.js

Adapter for SvelteKit apps to work on AWS Lambda

import fs from "node:fs";
import { fileURLToPath } from "node:url";
const __dirname = fileURLToPath(new URL(".", import.meta.url));
import { build } from "esbuild";
import * as path from "path";
import { cp, rm, } from "fs/promises";
import { existsSync } from "node:fs";
async function bundleApp() {
    await rm(path.join("build"), { recursive: true, force: true });
    await build({
        entryPoints: [path.join("out", "server", "lambda-handler", "index.js")],
        bundle: true,
        platform: "node",
        target: ["esnext"],
        format: "esm",
        outExtension: {
            ".js": ".mjs",
        },
        banner: {
            js: [
                `import { createRequire as topLevelCreateRequire } from 'module';`,
                `const require = topLevelCreateRequire(import.meta.url);`,
            ].join(""),
        },
        outdir: path.join("build"),
    });
    if (existsSync(path.join("out", "prerendered"))) {
        await cp(path.join("out", "prerendered"), path.join("build", "prerendered"), {
            recursive: true,
        });
    }
    else {
        console.log("No Prerendered Directory found.");
    }
    console.log("BUILD SUCEEDED!");
}
function adapter() {
    const adapter = {
        name: "sachtak-adapter",
        async adapt(builder) {
            const out = path.join("out");
            const clientDir = path.join(out, "client");
            const serverDir = path.join(out, "server");
            const prerenderedDir = path.join(out, "prerendered");
            // Cleanup output folder
            builder.rimraf(out);
            // builder.mkdirp(clientDir);
            // builder.mkdirp(serverDir);
            // builder.mkdirp(prerenderedDir);
            // Create static output
            builder.log.minor("Copying assets...");
            builder.writeClient(clientDir);
            const prerenderedFiles = builder.writePrerendered(prerenderedDir);
            // Create Lambda function
            builder.log.minor("Generating server function...");
            builder.writeServer(serverDir);
            // copy over handler files in server handler folder
            builder.copy(path.join(__dirname, "handler"), path.join(serverDir, "lambda-handler"));
            // save a list of files in server handler folder
            fs.writeFileSync(path.join(serverDir, "lambda-handler", "prerendered-file-list.js"), `export default ${JSON.stringify(prerenderedFiles)}`);
        },
    };
    return adapter;
}
export { adapter, bundleApp };