ci/eval/compare: truncate step summary to 1024k

  end;

def itemize_packages(xs):

  # we truncate the list to stay below the GitHub limit of 1MB per step summary.

  truncate(xs; 3000) | map("- [\(.)](https://search.nixos.org/packages?channel=unstable&show=\(.)&from=0&size=50&sort=relevance&type=packages&query=\(.))") | join("\n");

  truncate(xs; 2000) |

    map("- [\(.)](https://search.nixos.org/packages?channel=unstable&show=\(.)&from=0&size=50&sort=relevance&type=packages&query=\(.))")  |

    join("\n");

def get_title(s; xs):

  s + " (" + (xs | length | tostring) + ")";

def section(title; xs):

  "<details> <summary>" + title + " (" + (xs | length | tostring) + ")</summary>\n\n" + itemize_packages(xs) + "</details>";

  "<details> <summary>" + get_title(title; xs) + "</summary>\n\n" + itemize_packages(xs) + "</details>";

def fallback_document(content; n):

  if content | utf8bytelength > n then

    get_title("Added packages"; .attrdiff.added) + "\n\n" +

    get_title("Removed packages"; .attrdiff.removed) + "\n\n" +

    get_title("Changed packages"; .attrdiff.changed)

  else content

  end;

# we truncate the list to stay below the GitHub limit of 1MB per step summary.

fallback_document(

  section("Added packages"; .attrdiff.added) + "\n\n" +

  section("Removed packages"; .attrdiff.removed) + "\n\n" +

section("Changed packages"; .attrdiff.changed)

  section("Changed packages"; .attrdiff.changed); 1000 * 1000

)