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# SPDX-FileCopyrightText: V <v@unfathomable.blue>
# SPDX-License-Identifier: OSL-3.0
{ config, lib, pkgs, ... }:
with lib;
let
webroot = "/var/lib/acme/challenges";
in {
options = {
# We want to set webroot on every single certificate, but trying
# to do this by using genAttrs on the certificate attribute names
# produces infinite recursion. To get around this, we're instead
# setting webroot from within the certificate submodule itself.
#
# The fact that this is even possible is because submodules are
# just like normal modules, insofar that they can have both an
# 'options' and a 'config' attribute, both of which are scoped
# to the submodule itself. Additionally, normal merging logic
# is applied to module options, meaning we can just define the
# certificates option again and that'll be handled correctly.
#
# TODO(V): Add a global security.acme.webroot option to the upstream module
security.acme.certs = mkOption {
type = types.attrsOf (types.submodule {
inherit webroot;
});
};
};
config = {
security.acme = {
acceptTerms = true;
email = "acme@unfathomable.blue";
};
services.caddy.config = ''
${concatStringsSep ", " (unique (mapAttrsToList (_: cert: "http://${cert.domain}") config.security.acme.certs))} {
import all
route {
# TODO(V): make use of the 'file' matcher, so this is guaranteed to never 404?
file_server /.well-known/acme-challenge/* {
root ${webroot}
}
# Manually handling http:// disables Caddy's automatic HTTPS
# redirects for the domain, so let's do that ourselves
redir https://{host}{uri} 308
}
}
'';
};
}
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