write-readme.js

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

const writeReadme = (readme, propsTable, regex, force) => {
  try {
    let readmeContent = '';

    if(!fs.existsSync(readme)) {
      console.warn(chalk.yellow(`${readme} not found.`));
    } else {
      readmeContent = fs.readFileSync(path.resolve(process.cwd(), readme), 'utf-8');
    }

    if (readmeContent.match(regex)) {
      const result = readmeContent.replace(
        regex,
        '<!-- props-table-start -->\n' + propsTable + '<!-- props-table-end -->'
      );

      fs.writeFile(readme, result, 'utf-8', (e) => {
        if (e) {
          return console.error(chalk.red(`Error updating propsTable in ${readme}: ${e}`));
        } else {
          return console.log(chalk.green(`${readme} updated successfully.`));
        }
      });
    } else {
      if (force) {
        const result = readmeContent + '\n\n<!-- props-table-start -->\n' + propsTable + '<!-- props-table-end -->';

        fs.writeFile(readme, result, 'utf-8', (e) => {
          if (e) {
            return console.error(chalk.red(`Error updating propsTable in ${readme}: ${e}`));
          } else {
            return console.log(chalk.green(`${readme} force updated successfully.`));
          }
        });
      } else {
        console.warn(
          chalk.yellow(`Could not find propsTable to replace in ${readme}\n`),
          'The props table needs to be wrapped between <!-- props-table-start --> and <!-- props-table-end -->\n',
          'or use with --force to add to the end of the file'
        )
      }
    }
  } catch (e) {
    console.error(chalk.red(`Error updating propsTable in ${readme}: ${e}`));
  }
}

module.exports = writeReadme;