removeIdenticalMsgidMsgstr.js

const fs = require('fs');
const path = require('path');

// Check if a filename was provided as an argument
if (process.argv.length < 3) {
  console.error('Please provide the filename as an argument.');
  process.exit(1);
}

// Get the filename from the command line arguments
const inputFile = process.argv[2];

// Check if the file exists
if (!fs.existsSync(inputFile)) {
  console.error(`File not found: ${inputFile}`);
  process.exit(1);
}

// Read the input file
fs.readFile(inputFile, 'utf8', (err, data) => {
  if (err) {
    console.error(`Error reading file: ${err}`);
    return;
  }

  // Split the file content into entries
  const entries = data.split('\n\n');

  // Function to extract multiline msgid or msgstr
  function extractMultilineValue(entry, key) {
    const lines = entry.split('\n');
    const keyIndex = lines.findIndex(line => line.startsWith(key));
    if (keyIndex === -1) return '';

    let value = '';
    for (let i = keyIndex + 1; i < lines.length; i++) {
      const line = lines[i].trim();
      if (line.startsWith('"') && line.endsWith('"')) {
        value += line.slice(1, -1);
      } else {
        break;
      }
    }
    return value || lines[keyIndex].replace(`${key} `, '').replace(/^"(.*)"$/, '$1');
  }

  // Filter out entries where msgid and msgstr are identical
  const filteredEntries = entries.filter(entry => {
    const msgid = extractMultilineValue(entry, 'msgid');
    const msgstr = extractMultilineValue(entry, 'msgstr');
    return msgid !== msgstr;
  });

  // Join the filtered entries back into a single string
  const outputData = filteredEntries.join('\n\n');

  // Write the filtered content back to the original file
  fs.writeFile(inputFile, outputData, 'utf8', (err) => {
    if (err) {
      console.error(`Error writing file: ${err}`);
    } else {
      console.log(`Filtered content has been written to ${inputFile}`);
    }
  });
});