install.ts

import { nodeFileTrace } from "@vercel/nft";
import fs from "fs/promises";
import path from "path";

// Get command-line arguments
let [rootDir, serverFile, targetDir] = process.argv.slice(2);
if (targetDir === undefined) {
    targetDir = serverFile;
    serverFile = rootDir;
    rootDir = "";
}

if (!serverFile || !targetDir) {
    console.error("Usage: node --import=@swc-node/register/esm-register install.ts <server-file> <target-directory>");
    process.exit(1);
}

if (rootDir) {
    if (!path.isAbsolute(targetDir)) {
        targetDir = path.relative(path.resolve(rootDir), path.resolve(targetDir));
    }
    process.chdir(rootDir);
}

try {
    // Trace dependencies of the provided file
    const { fileList } = await nodeFileTrace([serverFile],
        { conditions: ['node', 'production'] });

    // Resolve absolute paths to avoid nested copying
    const targetDirAbsolute = path.resolve(targetDir);

    // Copy each file to the target directory with its nested structure
    for (const filePath of fileList) {
        const targetPath = path.join(targetDir, filePath);

        // Get the absolute path of the source file
        const sourcePathAbsolute = path.resolve(filePath);

        // Check if the file is already in the target directory
        if (sourcePathAbsolute.startsWith(targetDirAbsolute)) {
            continue;
        }

        // Create necessary directories
        await fs.mkdir(path.dirname(targetPath), { recursive: true });

        // Copy the file
        await fs.copyFile(filePath, targetPath);
        console.log(`Copied ${ path.join(rootDir, filePath) } to ${ targetPath }`);
    }

    console.log("All files copied successfully.");
} catch (err) {
    console.error("Error:", err);
}