{ forgejo }:

forgejo.overrideAttrs (prev: {
  patches = [
    # Branch divergence calculations for a single branch may take 100-200ms on something as big
    # as nixpkgs. The branch view defaults to 20 branches for each page, taking roughtly 3s to
    # calculate each branch sequentially and render, while consuming a single core at 100%.
    # The idea is to look into making this less expensive or async.
    # But for now, to get this going, we will simply drop that metric.
    ./branch-view_remove-expensive-commit-divergence-metric.patch

    # This is literally broken and eats resources for nothing of value.
    # We should upstream this.
    # The tl;dr is: It calculates the nearest branch for the requested commit at
    # /:owner/:repo/commit/:commit to use it as the default cherry-pick target branch
    # selection in a drop-down only users with commit perms can actually view and use.
    # It's expensive to calculate and happens on every request to /commit/:commit.
    # To add insult to injury, it's hardly of any use: The nearest branch of a commit
    # will almost always be a branch that already carries the commit. The branch you
    # most likely don't want to cherry-pick to.
    ./commit-view_fix-broken-and-expensive-cherry-pick-default-branch-selection.patch

    # Disable various /:owner/:repo/activity/ sub-views. They are expensive, which is
    # totally fine and expected. There is even proper caching in place.
    # However, on a scale of nixpkgs, those calculations take ages, while, of course,
    # pinning a single CPU core at 100%.
    # For now, we will simply disable this feature.
    # Due to the 501 status code it returns, the frontend prints a "Not implemented"
    # error, saving us from patching the frontend while still providing a helpful
    # user-facing error text.
    # It should be noted that this particular status code has the downside of being
    # in the 5xx range, meaning it will show up as such in our prometheus metrics.
    ./disable-expensive-repository-activity-stats.patch

    # Migrations and pull-mirrors are something easily abused to bring a public instance to a complete halt.
    # Both features can be disabled via repository.DISABLE_MIGRATIONS and mirror.ENABLE, but we want to keep
    # this functionality for admins.
    ./limit-migrations-and-pull-mirrors-to-admins.patch
  ];
})