remove-inline-sourcemaps.mjs

remove-inline-sourcemaps.mjs

#!/usr/bin/env node

import { readdir, readFile, stat, writeFile } from 'node:fs/promises';
import path from 'node:path';

const rootDir = path.resolve(process.argv[2] ?? process.cwd());
const skipDirs = new Set(['.git', 'node_modules']);
const sourceMapLine = /^[ \t]*\/\/# sourceMappingURL=data:app[^\r\n]*(?:\r?\n)?/gm;

let filesChecked = 0;
let filesUpdated = 0;

async function walk(dir) {
  const entries = await readdir(dir, {
    withFileTypes: true
  });

  for (const entry of entries) {
    const fullPath = path.join(dir, entry.name);

    if (entry.isDirectory()) {
      if (!skipDirs.has(entry.name)) {
        await walk(fullPath);
      }
      continue;
    }

    if (!entry.isFile()) {
      continue;
    }

    filesChecked += 1;

    let content;
    try {
      content = await readFile(fullPath, 'utf8');
    } catch {
      continue;
    }

    if (!sourceMapLine.test(content)) {
      sourceMapLine.lastIndex = 0;
      continue;
    }

    sourceMapLine.lastIndex = 0;
    const nextContent = content.replace(sourceMapLine, '');

    if (nextContent !== content) {
      await writeFile(fullPath, nextContent, 'utf8');
      filesUpdated += 1;
      console.log(path.relative(rootDir, fullPath));
    }
  }
}

const rootStats = await stat(rootDir);
if (!rootStats.isDirectory()) {
  throw new Error(`Not a directory: ${rootDir}`);
}

await walk(rootDir);
console.log(`Checked ${filesChecked} files, updated ${filesUpdated}.`);