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author | Silvan Mosberger <contact@infinisil.com> | 2020-03-07 01:53:31 +0100 |
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committer | Silvan Mosberger <contact@infinisil.com> | 2020-03-07 01:53:31 +0100 |
commit | ec6e4db6e413219fd55ba52d207de4d59a356057 (patch) | |
tree | c0e528042334dd68b15ec0c22c7ac312eeb8ad15 /nixos/modules/config | |
parent | efcab647abf3fd16020f970f66b1b2f5c29299cf (diff) | |
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nixos/networking: Add hostFiles option
When blocklists are built with a derivation, using extraHosts would require IFD, since the result of the derivation needs to be converted to a string again. By introducing this option no IFD is needed for such use-cases, since the fetched files can be assigned directly.
Diffstat (limited to 'nixos/modules/config')
-rw-r--r-- | nixos/modules/config/networking.nix | 27 |
1 files changed, 21 insertions, 6 deletions
diff --git a/nixos/modules/config/networking.nix b/nixos/modules/config/networking.nix index 81427bb8ee64..dd36696b94d2 100644 --- a/nixos/modules/config/networking.nix +++ b/nixos/modules/config/networking.nix @@ -35,12 +35,22 @@ in ''; }; + networking.hostFiles = lib.mkOption { + type = types.listOf types.path; + defaultText = lib.literalExample "Hosts from `networking.hosts` and `networking.extraHosts`"; + example = lib.literalExample ''[ "''${pkgs.my-blocklist-package}/share/my-blocklist/hosts" ]''; + description = '' + Files that should be concatenated together to form <filename>/etc/hosts</filename>. + ''; + }; + networking.extraHosts = lib.mkOption { type = types.lines; default = ""; example = "192.168.0.1 lanlocalhost"; description = '' Additional verbatim entries to be appended to <filename>/etc/hosts</filename>. + For adding hosts from derivation results, use <option>networking.hostFiles</option> instead. ''; }; @@ -159,6 +169,15 @@ in "::1" = [ "localhost" ]; }; + networking.hostFiles = let + stringHosts = + let + oneToString = set: ip: ip + " " + concatStringsSep " " set.${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 [ stringHosts extraHosts ]; + environment.etc = { # /etc/services: TCP/UDP port assignments. services.source = pkgs.iana-etc + "/etc/services"; @@ -167,12 +186,8 @@ in protocols.source = pkgs.iana-etc + "/etc/protocols"; # /etc/hosts: Hostname-to-IP mappings. - hosts.text = let - oneToString = set: ip: ip + " " + concatStringsSep " " set.${ip}; - allToString = set: concatMapStringsSep "\n" (oneToString set) (attrNames set); - in '' - ${allToString (filterAttrs (_: v: v != []) cfg.hosts)} - ${cfg.extraHosts} + hosts.source = pkgs.runCommandNoCC "hosts" {} '' + cat ${escapeShellArgs cfg.hostFiles} > $out ''; # /etc/host.conf: resolver configuration file |