export async function getAffectedReadmes()

in eng/tools/lint-diff/src/processChanges.ts [301:341]

• 29 lines of code
• 8 McCabe index (conditional complexity)

export async function getAffectedReadmes(
  changedFiles: string[],
  repoRoot: string,
): Promise<string[]> {
  // OK to use / because changedFiles comes from git which always uses /
  const changedFilesInSpecDir = changedFiles.filter((file) => file.startsWith(`specification/`));

  const changedReadmeFiles = [];
  for (const file of changedFilesInSpecDir) {
    if (file.toLowerCase().endsWith(`/readme.md`) && (await pathExists(join(repoRoot, file)))) {
      changedReadmeFiles.push(file);
    }
  }

  const changedSpecFiles = changedFilesInSpecDir.filter((f) =>
    [".md", ".json", ".yaml", ".yml"].some((p) => f.toLowerCase().endsWith(p)),
  );

  const readmeFiles = new Set<string>(changedReadmeFiles);
  const visitedFolders = new Set<string>();

  // For each changed spec file, walk up the directory tree collecting readme
  // files until reaching the "specification/" directory (already filtered in
  // changedFilesInSpecDir)
  for (const specFile of changedSpecFiles) {
    let dir = dirname(specFile);
    // Exclude '.' as it is outside the specification folder for purposes of
    // this function (avoid including root readme.md file)
    while (!visitedFolders.has(dir) && dir !== "specification") {
      visitedFolders.add(dir);
      // TODO: Case sensitivity??
      const readmeFile = join(repoRoot, dir, "readme.md");
      if (await pathExists(readmeFile)) {
        readmeFiles.add(join(dir, "readme.md"));
      }
      dir = dirname(dir);
    }
  }

  return [...readmeFiles];
}