cally/plugins/withPodfile.js

const { withDangerousMod, withPlugins } = require('@expo/config-plugins');

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

async function readFile(path) {
    return fs.promises.readFile(path, 'utf8');
}

async function saveFile(path, content) {
    return fs.promises.writeFile(path, content, 'utf8');
}

module.exports = (config) =>
    withPlugins(config, [
        (config) => {
            return withDangerousMod(config, [
                'iOS',
                async (config) => {
                    const file = path.join(config.modRequest.platformProjectRoot, 'Podfile');

                    /*
                     * You need to remove the line before adding it.
                     * If you don't do this and you run `expo prebuild` in a dirt project
                     * your file will have the same line added twice
                     */
                    const contents = (await readFile(file)).replace(
                        /pod 'IQKeyboardManagerSwift', :git => 'https:\/\/github.com\/douglasjunior\/IQKeyboardManager.git', :branch => 'react-native-keyboard-manager'\n\n/g,
                        '',
                    );
                    /*
                     * Now re-adds the content
                     */
                    await saveFile(
                        file,
                        `pod 'IQKeyboardManagerSwift', :git => 'https://github.com/douglasjunior/IQKeyboardManager.git', :branch => 'react-native-keyboard-manager'\n\n${contents}`,
                    );
                    return config;
                },
            ]);
        },
    ]);