Get CDN url

non_minified.js

function url(u) {
  const GITHUB_API_URL = "https://api.github.com";

  const TEMPLATES = [
    [
      /^(https?):\/\/gitlab\.com\/([^\/]+.*\/[^\/]+)\/(?:raw|blob)\/(.+?)(?:\?.*)?$/i,
      "$1://gl.githack.com/$2/raw/$3",
    ],
    [
      /^(https?):\/\/bitbucket\.org\/([^\/]+\/[^\/]+)\/(?:raw|src)\/(.+?)(?:\?.*)?$/i,
      "$1://bb.githack.com/$2/raw/$3",
    ],

    // snippet file URL from web interface, with revision
    [
      /^(https?):\/\/bitbucket\.org\/snippets\/([^\/]+\/[^\/]+)\/revisions\/([^\/\#\?]+)(?:\?[^#]*)?(?:\#file-(.+?))$/i,
      "$1://bb.githack.com/!api/2.0/snippets/$2/$3/files/$4",
    ],
    // snippet file URL from web interface, no revision
    [
      /^(https?):\/\/bitbucket\.org\/snippets\/([^\/]+\/[^\/\#\?]+)(?:\?[^#]*)?(?:\#file-(.+?))$/i,
      "$1://bb.githack.com/!api/2.0/snippets/$2/HEAD/files/$3",
    ],
    // snippet file URLs from REST API
    [
      /^(https?):\/\/bitbucket\.org\/\!api\/2.0\/snippets\/([^\/]+\/[^\/]+\/[^\/]+)\/files\/(.+?)(?:\?.*)?$/i,
      "$1://bb.githack.com/!api/2.0/snippets/$2/files/$3",
    ],
    [
      /^(https?):\/\/api\.bitbucket\.org\/2.0\/snippets\/([^\/]+\/[^\/]+\/[^\/]+)\/files\/(.+?)(?:\?.*)?$/i,
      "$1://bb.githack.com/!api/2.0/snippets/$2/files/$3",
    ],

    // welcome rawgit refugees
    [
      /^(https?):\/\/(?:cdn\.)?rawgit\.com\/(.+?\/[0-9a-f]+\/raw\/(?:[0-9a-f]+\/)?.+)$/i,
      "$1://gist.githack.com/$2",
    ],
    [
      /^(https?):\/\/(?:cdn\.)?rawgit\.com\/([^\/]+\/[^\/]+\/[^\/]+|[0-9A-Za-z-]+\/[0-9a-f]+\/raw)\/(.+)/i,
      "$1://raw.githack.com/$2/$3",
    ],

    [
      /^(https?):\/\/raw\.github(?:usercontent)?\.com\/([^\/]+\/[^\/]+\/[^\/]+|[0-9A-Za-z-]+\/[0-9a-f]+\/raw)\/(.+)/i,
      "$1://raw.githack.com/$2/$3",
    ],
    [
      /^(https?):\/\/github\.com\/(.[^\/]+?)\/(.[^\/]+?)\/(?!releases\/)(?:(?:blob|raw)\/)?(.+?\/.+)/i,
      "$1://raw.githack.com/$2/$3/$4",
    ],
    [
      /^(https?):\/\/gist\.github(?:usercontent)?\.com\/(.+?\/[0-9a-f]+\/raw\/(?:[0-9a-f]+\/)?.+)$/i,
      "$1://gist.githack.com/$2",
    ],

    [
      /^(https?):\/\/git\.sr\.ht\/(~[^\/]+\/[^\/]+\/blob\/.+\/.+)/i,
      "$1://srht.githack.com/$2",
    ],
    [
      /^(https?):\/\/hg\.sr\.ht\/(~[^\/]+\/[^\/]+\/raw\/.+)/i,
      "$1://srhgt.githack.com/$2",
    ],
  ];

  function mergeSlashes(url) {
    try {
      var url = new URL(url);
    } catch (e) {
      return url;
    }
    url.pathname = url.pathname.replace(/\/\/+/gi, "/");
    return url.toString();
  }

  function maybeConvertUrl(url) {
    for (var i in TEMPLATES) {
      var [pattern, template] = TEMPLATES[i];
      if (pattern.test(url)) {
        return url.replace(pattern, template);
      }
    }
  }

  function cdnize(url) {
    return url.replace(/^(\w+):\/\/(\w+)/, "$1://$2cdn");
  }
  return new Promise((resolve) => {
    var ghUrl = maybeConvertUrl(u);
    var dev, prod;
    if (ghUrl) {
      var matches = ghUrl.match(
        /^(\w+:\/\/(raw).githack.com\/([^\/]+)\/([^\/]+))\/([^\/]+)\/(.*)/i
      );
      if (!matches) {
        dev = ghUrl;
        prod = cdnize(ghUrl);
        setValid();
      } else if (matches[2] === "raw") {
        dev = ghUrl;
        let apiUrl = `${GITHUB_API_URL}/repos/${matches[3]}/${matches[4]}/git/refs/heads/${matches[5]}`;
        fetch(apiUrl)
          .then((res) => {
            if (res.ok) return res.json();
          })
          .then((data) => {
            let ref =
              data && data.object && data.object.sha
                ? data.object.sha
                : matches[5];
            prod = cdnize(`${matches[1]}/${ref}/${matches[6]}`);
            resolve({ prod, dev });
          });
      }
    }
  });
}