get authors in a file from git

get-authors.ts

async function getAuthors(
  filePath: string,
  startLine: number,
  endLine: number,
): Promise<{ author: string; email: string; commitTime: string }[]> {
  const { stdout } = await execAsync(
    `git log -s --max-count 10 --author-date-order --pretty='format: { "author": "%an", "email": "%aE", "committedAt":"%aI" }' -L ${startLine},${endLine}:${filePath}`,
  );

  const authors = stdout.split('\n').map((line) => {
    try {
      return JSON.parse(line);
    } catch (err) {
      console.error(
        'Failed to parse output of git log when getting authors for file ',
        filePath,
      );
      throw err;
    }
  });

  const uniqueAuthors = [...new Map(authors.map((item) => [item.author, item])).values()];
  return uniqueAuthors;
}