let cachedFlatPatches = null

export default async (repos) => {
  if (cachedFlatPatches !== null) { return cachedFlatPatches }

  cachedFlatPatches = Object.keys(repos).flatMap((repoName) => {
    return Object.keys(repos[repoName].branches).flatMap((branchName) => {
      return repos[repoName].branches[branchName].patches.map((patch) => {
        return {
          patch,
          branchName,
          repoName,
        }
      })
    })
  })

  return cachedFlatPatches
}