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{ config, lib, pkgs, ... }:
with lib; let
check = hostname: any (domain: hasSuffix ".${domain}" hostname) domains;
domains = attrNames (filterAttrs (_: slib.eq "hosts") config.krebs.dns.providers);
# we need this import because we have infinite recursion otherwise
slib = import ../../lib/lib.nix { inherit lib; };
in {
options = {
krebs.hosts = mkOption {
default = {};
type = types.attrsOf slib.types.host;
};
};
config = lib.mkIf config.krebs.enable {
networking.hosts =
filterAttrs
(_name: value: value != [])
(zipAttrsWith
(_: concatLists)
(concatMap
(host:
concatMap
(net: let
aliases = longs ++ shorts;
longs = filter check net.aliases;
shorts = let s = ".${config.krebs.dns.search-domain}"; in
optionals
(config.krebs.dns.search-domain != null)
(map (removeSuffix s)
(filter (hasSuffix s)
longs));
in
map (addr: { ${addr} = aliases; }) net.addrs)
(attrValues host.nets))
(attrValues config.krebs.hosts)));
nixpkgs.config.packageOverrides = super: let
# nameValuePair name value : { "name" : name, "value" : value }
# addr : str
# aliase : str
# hostname : str
# netname : str
# addrAliases : nameValuePair addr [alias]
# hostNetAliases : host -> { ${netname} : [addrAliases] }
hostNetAliases = host:
mapAttrs (_: net: filter (x: x.name != null && x.value != []) [
{ name = net.ip4.addr or null; value = net.aliases; }
{ name = net.ip4.addr or null; value = (map (alias: "4.${alias}") net.aliases); }
{ name = net.ip6.addr or null; value = net.aliases; }
{ name = net.ip6.addr or null; value = (map (alias: "6.${alias}") net.aliases); }
]) host.nets;
# netAliases : { ${netname} : [addrAliases] }
netAliases =
foldl'
(result: host:
foldl'
# λ netAliases -> [addrAliases] -> netAliases
(result: { name, value }: result // {
${name} = result.${name} or [] ++ value;
})
result
(mapAttrsToList nameValuePair (hostNetAliases host))
)
{}
(attrValues config.krebs.hosts);
# writeHosts : str -> [addrAliases] -> package
writeHosts = name: addrAliases: super.writeText name ''
${concatMapStringsSep
"\n"
({ name, value }: "${name} ${toString value}")
addrAliases}
'';
in
{
# hosts file for all krebs networks
krebs-hosts =
writeHosts "krebs-hosts" (concatLists [
netAliases.internet
netAliases.retiolum
netAliases.wiregrill
]);
# combined hosts file for all networks (even custom ones)
krebs-hosts_combined =
writeHosts "krebs-hosts_combined"
(concatLists (attrValues netAliases));
}
//
slib.genAttrs' (attrNames netAliases) (netname: rec {
name = "krebs-hosts-${netname}";
value = writeHosts name netAliases.${netname};
});
};
}
|
