cgit.js


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// To use this, add this to /var/lib/git/static/cgit.js and set js=/cgit.js in your cgitrc.

// Check if in repo
if (/\/[^/]+\.git\/.*/iu.test(location.pathname)) {
  // Get repo
  const repo = location.pathname.match(/\/([^/]+\.git)\/.*/iu)?.[1];
  // Get commit
  const get_commit = async () => {
    const commit_url = document.querySelector(
      `a[href^=${JSON.stringify(`/${repo}/commit`)}]`
    )?.href;
    if (!commit_url) return null;
    const page_txt = await fetch(commit_url).then((v) => v.text());
    const page_xml = new DOMParser().parseFromString(page_txt, "text/html");
    return (
      [...page_xml.querySelectorAll('a[href*="id="]')]
        .map((v) => {
          const id = new URL(
            v.getAttribute("href") ?? "https://example.com",
            location.href
          ).searchParams.get("id");
          return id;
        })
        .find(
          (v) =>
            !isNaN(Number(`0x${v}`)) &&
            !v.includes(".") &&
            // SHA1 repositories
            (v.length === 40 ||
              // SHA256 repositories
              v.length === 64)
        ) ?? null
    );
  };

  // Check if in tree
  if (/\/[^/]+\.git\/tree\/.*/iu.test(location.pathname)) {
    // Check if viewing blob
    if (document.querySelector(".content")?.textContent.includes("blob:")) {
      // Ensure we're viewing blob
      const blob = document
        .querySelector(".content")
        .textContent.match(/blob: ([0-9a-zA-Z]+)/)?.[1];
      if (blob && !document.querySelector('a[data-target="permalink"]')) {
        (async () => {
          const commit = await get_commit();
          if (
            commit &&
            !document.querySelector('a[data-target="permalink"]') &&
            !document.querySelector('a[data-target="unpermalink"]')
          ) {
            const is_permalink =
              new URLSearchParams(location.search).get("id") !== commit;
            // Add element
            const a = document.createElement("a");
            const new_location = new URL(location.href);
            if (is_permalink) new_location.searchParams.set("id", commit);
            else new_location.searchParams.delete("id");
            a.href = `${new_location.pathname}${new_location.search}${new_location.hash}`;
            a.textContent = is_permalink ? "permalink" : "latest";
            a.setAttribute(
              "data-target",
              (is_permalink ? "" : "un") + "permalink"
            );
            document.querySelector('.content > a[href*="/plain/"]').outerHTML +=
              ", " + a.outerHTML;
          }
        })();
      }
    }
  }
}