Function getChangedFilesForRoots

packages/jest-changed-files/src/index.ts:26–60

(
  roots: Array<string>,
  options: Options,
)

const findSlRoot = (dir: string) => mutex(() => sl.getRoot(dir));

export const getChangedFilesForRoots = async (
  roots: Array<string>,
  options: Options,
): ChangedFilesPromise => {
  const repos = await findRepos(roots);

  const changedFilesOptions = {includePaths: roots, ...options};

  const gitPromises = Array.from(repos.git, repo =>
    git.findChangedFiles(repo, changedFilesOptions),
  );

  const hgPromises = Array.from(repos.hg, repo =>
    hg.findChangedFiles(repo, changedFilesOptions),
  );

  const slPromises = Array.from(repos.sl, repo =>
    sl.findChangedFiles(repo, changedFilesOptions),
  );

  const allVcs = await Promise.all([
    ...gitPromises,
    ...hgPromises,
    ...slPromises,
  ]);
  const changedFiles = allVcs.reduce((allFiles, changedFilesInTheRepo) => {
    for (const file of changedFilesInTheRepo) {
      allFiles.add(file);
    }

    return allFiles;
  }, new Set<string>());

  return {changedFiles, repos};
};

export const findRepos = async (roots: Array<string>): Promise<Repos> => {
  const [gitRepos, hgRepos, slRepos] = await Promise.all([