Revert "Add networking.hosts and .hostFiles from nixos "

.github/workflows/test.yml

@@ -47,14 +47,12 @@ jobs:
         sudo cp modules/examples/simple.nix /etc/nix-darwin/configuration.nix
 
         nixConfHash=$(shasum -a 256 /etc/nix/nix.conf | cut -d ' ' -f 1)
-        etcHostsHash=$(shasum -a 256 /etc/hosts | cut -d ' ' -f 1)
         sudo /usr/bin/sed -i.bak \
           "s/# programs.fish.enable = true;/ \
             imports = [ \
               ({ options, ... }: { \
                 nix.settings.access-tokens = [ \"github.com=\${{ secrets.GITHUB_TOKEN }}\" ]; \
                 environment.etc.\"nix\/nix.conf\".knownSha256Hashes = [ \"$nixConfHash\" ]; \
-                environment.etc.hosts.knownSha256Hashes = [ \"$etcHostsHash\" ]; \
                 nix.nixPath = \
                   [ { darwin = \"${PWD////\/}\"; } ] \
                   ++ options.nix.nixPath.default; \
@@ -104,9 +102,8 @@ jobs:
         pushd /etc/nix-darwin
           sudo nix flake init -t $darwin
           nixConfHash=$(shasum -a 256 /etc/nix/nix.conf | cut -d ' ' -f 1)
-          etcHostsHash=$(shasum -a 256 /etc/hosts | cut -d ' ' -f 1)
           sudo /usr/bin/sed -i.bak \
-            "s/# programs.fish.enable = true;/nix.settings.access-tokens = [ \"github.com=\${{ secrets.GITHUB_TOKEN }}\" ]; environment.etc.\"nix\/nix.conf\".knownSha256Hashes = [ \"$nixConfHash\" ]; environment.etc.hosts.knownSha256Hashes = [ \"$etcHostsHash\" ];/" \
+            "s/# programs.fish.enable = true;/nix.settings.access-tokens = [ \"github.com=\${{ secrets.GITHUB_TOKEN }}\" ]; environment.etc.\"nix\/nix.conf\".knownSha256Hashes = [ \"$nixConfHash\" ];/" \
             flake.nix
           sudo /usr/bin/sed -i.bak \
             's/darwinConfigurations."simple"/darwinConfigurations."'$(scutil --get LocalHostName)'"/g' \

doc/known-files/c7dd0e2ed261ce76d76f852596c5b54026b9a894fa481381ffd399b556c0e2da

@@ -1,9 +0,0 @@
-##
-# Host Database
-#
-# localhost is used to configure the loopback interface
-# when the system is booting.  Do not change this entry.
-##
-127.0.0.1	localhost
-255.255.255.255	broadcasthost
-::1             localhost

modules/networking/default.nix

@@ -1,4 +1,4 @@
-{ config, lib, pkgs, ... }:
+{ config, lib, ... }:
 
 with lib;
 
@@ -22,8 +22,6 @@ let
       esac
     '') cfg.knownNetworkServices}
   '';
-
-  localhostMultiple = any (elem "localhost") (attrValues (removeAttrs cfg.hosts [ "127.0.0.1" "::1" ]));
 in
 
 {
@@ -107,50 +105,9 @@ in
         Battery powered devices may require being connected to power.
       '';
     };
-
-    networking.hosts = lib.mkOption {
-      type = types.attrsOf (types.listOf types.str);
-      example = literalExpression ''
-        {
-          "127.0.0.1" = [ "foo.bar.baz" ];
-          "192.168.0.2" = [ "fileserver.local" "nameserver.local" ];
-        };
-      '';
-      description = ''
-        Locally defined maps of hostnames to IP addresses.
-      '';
-      default = {};
-    };
-
-    networking.hostFiles = lib.mkOption {
-      type = types.listOf types.path;
-      defaultText = literalMD "Hosts from {option}`networking.hosts` and {option}`networking.extraHosts`";
-      example = literalExpression ''[ "''${pkgs.my-blocklist-package}/share/my-blocklist/hosts" ]'';
-      description = ''
-        Files that should be concatenated together to form {file}`/etc/hosts`.
-      '';
-    };
-
-    networking.extraHosts = lib.mkOption {
-      type = types.lines;
-      default = "";
-      example = "192.168.0.1 lanlocalhost";
-      description = ''
-        Additional verbatim entries to be appended to {file}`/etc/hosts`.
-        For adding hosts from derivation results, use {option}`networking.hostFiles` instead.
-      '';
-    };
   };
 
   config = {
-    assertions = [{
-      assertion = !localhostMultiple;
-      message = ''
-        `networking.hosts` maps "localhost" to something other than "127.0.0.1"
-        or "::1". This will break some applications. Please use
-        `networking.extraHosts` if you really want to add such a mapping.
-      '';
-    }];
 
     warnings = [
       (mkIf (cfg.knownNetworkServices == [] && cfg.dns != []) "networking.knownNetworkServices is empty, dns servers will not be configured.")
@@ -177,36 +134,5 @@ in
       ''}
     '';
 
-    networking.hostFiles = let
-      # Note: localhostHosts has to appear first in /etc/hosts so that 127.0.0.1
-      # resolves back to "localhost" (as some applications assume) instead of
-      # the FQDN!
-      localhostHosts = pkgs.writeText "localhost-hosts" ''
-        ##
-        # Host Database
-        #
-        # localhost is used to configure the loopback interface
-        # when the system is booting.  Do not change this entry.
-        ##
-        127.0.0.1	localhost
-        255.255.255.255	broadcasthost
-        ::1             localhost
-      '';
-      stringHosts =
-        let
-          oneToString = set: ip: ip + " " + concatStringsSep " " set.${ip} + "\n";
-          allToString = set: concatMapStrings (oneToString set) (attrNames set);
-        in pkgs.writeText "string-hosts" (allToString (filterAttrs (_: v: v != []) cfg.hosts));
-      extraHosts = pkgs.writeText "extra-hosts" cfg.extraHosts;
-    in mkBefore [ localhostHosts stringHosts extraHosts ];
-
-    environment.etc.hosts = {
-      knownSha256Hashes = [
-        # Comes from MacOS: Darwin 24.1.0 Darwin Kernel Version 24.1.0.
-        "c7dd0e2ed261ce76d76f852596c5b54026b9a894fa481381ffd399b556c0e2da"
-      ];
-
-      source = pkgs.concatText "hosts" cfg.hostFiles;
-    };
   };
 }

release.nix

@@ -86,7 +86,6 @@ in {
   tests.launchd-daemons = makeTest ./tests/launchd-daemons.nix;
   tests.launchd-setenv = makeTest ./tests/launchd-setenv.nix;
   tests.networking-hostname = makeTest ./tests/networking-hostname.nix;
-  tests.networking-hosts = makeTest ./tests/networking-hosts.nix;
   tests.networking-networkservices = makeTest ./tests/networking-networkservices.nix;
   tests.nix-enable = makeTest ./tests/nix-enable.nix;
   tests.nixpkgs-overlays = makeTest ./tests/nixpkgs-overlays.nix;

tests/networking-hosts.nix

@@ -1,20 +0,0 @@
-{ config, pkgs, ... }:
-
-{
-  networking.hosts = {
-    "127.0.0.1" = [ "my.super.host" ];
-    "10.0.0.1" = [ "my.super.host" "my.other.host" ];
-  };
-
-  test = ''
-    set -v
-    echo checking /etc/hosts file >&2
-
-    file=${config.out}/etc/hosts
-
-    grep '127.0.0.1' $file | head -n1 | grep localhost$
-    grep '127.0.0.1' $file | tail -n1 | grep my.super.host$
-    grep '::1' $file | grep localhost$
-    grep '10.0.0.1' $file | grep my.super.host\ my.other.host$
-  '';
-}