Count lines-of-code changed on Github PR excluding certain files

github-changed-files-filter.js

/*
The number of changed files (additions/deletions) includes all files. 
I wanted to see how many files I had changed, excluding tests and test snapshots.
This filter will help you do that.

To use it, go to the PR, navigate to "Files" and invoke the following
*/

(function() {
  const excludeWords = ['test', 'mock-responses', 'typings'];
  document.querySelector('.toc-select button').click();

  setTimeout(() => {
    const { added, deleted } = Array.from(
      document.querySelectorAll('.select-menu-item-text')
    )
      .filter(item => item.querySelector('.filename') !== null)
      .map(item => {
        const trimNumber = elm => {
          if (!elm) {
            return 0;
          }
          return parseInt(
            elm.innerText
              .trim()
              .slice(1)
              .replace(/,/g, ''),
            10
          );
        };
        const added = trimNumber(item.querySelector('.text-green'));
        const deleted = trimNumber(item.querySelector('.text-red'));
        const filename = item.querySelector('.description').innerText.trim();
        return { added, deleted, filename };
      })
      .filter(item => !excludeWords.some(word => item.filename.includes(word)))
      .reduce(
        (acc, item) => {
          console.log(item);
          acc.added += item.added;
          acc.deleted += item.deleted;
          return acc;
        },
        { added: 0, deleted: 0 }
      );

    document.querySelector('.diffstat .text-green').innerText += `(${added})`;
    document.querySelector('.diffstat .text-red').innerText += `(${deleted})`;
  }, 1000);
})();