dependency-smell-reporter/lib/reporter.js

A CLI tool that detects unused, outdated, and missing dependencies with reporting.

const chalk = require("chalk");
const fs = require("fs");
const path = require("path");

function printReport(report) {
  const {
    unused,
    missing,
    outdated,
    largeNodeModules,
    usingTooMany
  } = report;

  if (unused.length) {
    console.log(chalk.yellow("⚠️ Unused Dependencies"));
    unused.forEach(dep => console.log(`  - ${dep}`));
    console.log();
  }

  if (missing.length) {
    console.log(chalk.red("⚠️ Missing Dependencies"));
    missing.forEach(dep => console.log(`  - ${dep}`));
    console.log();
  }

  if (outdated.length) {
    console.log(chalk.cyan("⚠️ Outdated Dependencies"));
    outdated.forEach(dep => console.log(`  - ${dep}`));
    console.log();
  }

  if (largeNodeModules) {
    console.log(chalk.magenta(`📦 Node_modules size: ${largeNodeModules} MB`));
  }

  console.log(chalk.green(`📚 Total Dependencies in use: ${usingTooMany}`));

  if (largeNodeModules > 200) {
    console.log(chalk.red("❗ Warning: node_modules folder is unusually large!"));
  }

  if (usingTooMany > 80) {
    console.log(chalk.red("❗ Warning: Too many dependencies may increase complexity."));
  }

  console.log(chalk.green("\n✅ Dependency Smell Check Complete!"));
}

function writeLogFile(report, outputPath = "dependency-smell-log.json") {
  try {
    const fullPath = path.join(process.cwd(), outputPath);
    fs.writeFileSync(fullPath, JSON.stringify(report, null, 2), "utf-8");
    console.log(chalk.gray(`📝 Log saved to ${outputPath}`));
  } catch (err) {
    console.error("❌ Failed to write log file:", err.message);
  }
}

module.exports = {
  printReport,
  writeLogFile
};