flow showing off how to clone, update and push to a git repo from an AWS lambda function

git-lambda.js

const fs = require('fs')
const path = require('path')
const process = require('process')
const { spawnSync } = require('child_process')

const { GITHUB_TOKEN, GITHUB_USERNAME, GITHUB_EMAIL } = process.env
// leaving this without https:// in order to reuse it when adding the remote
const gitRepositoryURL = 'github.com/owner/repo-name.git'
const repositoryName = 'repo-name'

function runCommand (commandString, options) {
  const [command, ...args] = commandString.match(/(".*?")|(\S+)/g)
  const cmd = spawnSync(command, args, options)

  // you should probably obfuscate the credentials before logging
  const errorString = cmd.stderr.toString()
  if (errorString) {
    throw new Error(
      `Git command failed
      ${commandString}
      ${errorString}`
    )
  }
}

exports.handle = async function (event, context, callback) {
  // install git binary
  await require('lambda-git')()
  // change the cwd to /tmp
  process.chdir('/tmp')
  // clone the repository and set it as the cwd
  // sadly, clone doesn't support --porcelain
  runCommand(`git clone --quiet https://${gitRepositoryURL}`)
  process.chdir(path.join(process.cwd(), repositoryName))

  // make your modifications to the local repository
  fs.appendFileSync(
    path.join(process.cwd(), 'README.md'),
    '\nAutomagically inserted line'
  )

  // update local git config with email and username (required)
  runCommand(`git config --local user.email ${GITHUB_EMAIL}`)
  runCommand(`git config --local user.name ${GITHUB_USERNAME}`)
  // stage local files
  runCommand('git add .')
  // commit changes
  runCommand('git commit -m "commit by :robot:"')
  // replace the remote with an authenticated one
  runCommand('git remote rm origin')
  runCommand(
    `git remote add origin https://${GITHUB_USERNAME}:${GITHUB_TOKEN}@${gitRepositoryURL}`
  )
  // push changes to remote
  runCommand('git push --porcelain --set-upstream origin master')
  // terminate the lambda
  callback(null, 'bye')
}

People this line saved my life (aws lambda + nodjs)

const bug = spawnSync("ln", ["-s", "/usr/lib64/libpcre.so.1.2.0", "/tmp/git/usr/lib64/libpcre.so.0"])