create-pull-request/src/isDocker.ts

import * as fs from 'fs'

function hasDockerEnv(): boolean {
  try {
    fs.statSync('/.dockerenv')
    return true
  } catch (_) {
    return false
  }
}

function hasDockerCGroup(): boolean {
  try {
    return fs.readFileSync('/proc/self/cgroup', 'utf8').includes('docker')
  } catch (_) {
    return false
  }
}

export function isDocker(): boolean {
  return hasDockerEnv() || hasDockerCGroup()
}