firebase-mods.js

const { withDangerousMod, withPlugins } = require('@expo/config-plugins')
const { mergeContents } = require('@expo/config-plugins/build/utils/generateCode')
const fs = require('fs')
const path = require('path')

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

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

const withFirebaseMods = (c) => {
    return withDangerousMod(c, [
        'ios',
        async (config) => {
            const file = path.join(config.modRequest.platformProjectRoot, 'Podfile')
            const contents = await readFileAsync(file)
            await saveFileAsync(file, addFirebaseConfigsToPodFile(contents))
            return config
        },
    ])
}

function addFirebaseConfigsToPodFile(src) {
    return mergeContents({
        tag: 'firebase-mods',
        src,
        newSrc: `
# install react-native-firebase as a static framework
$RNFirebaseAsStaticFramework = true
pod 'Firebase', :modular_headers => true
pod 'FirebaseCore', :modular_headers => true
pod 'GoogleUtilities', :modular_headers => true
`,
        anchor: /platform :ios/,
        offset: 0,
        comment: '#',
    }).contents
}

module.exports = (config) => withPlugins(config, [withFirebaseMods])