initial commit

13 files changed, 1414 insertions, 0 deletions

diff --git a/certs/zalora-ca.crt b/certs/zalora-ca.crt
new file mode 100644
index 000000000..12cdf8fc6
--- /dev/null
+++ b/certs/zalora-ca.crt
@@ -0,0 +1,24 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
diff --git a/lib/default.nix b/lib/default.nix
new file mode 100644
index 000000000..c1663a7b8
--- /dev/null
+++ b/lib/default.nix
@@ -0,0 +1,44 @@
+{ pkgs, ... }:
+
+with builtins;
+
+let
+  inherit (pkgs.lib) stringAsChars;
+in
+
+{
+
+
+  # "7.4.335" -> "74"
+  majmin = with pkgs.lib; x : concatStrings (take 2 (splitString "." x));
+
+
+  concat = xs :
+    if xs == []
+      then ""
+      else head xs + concat (tail xs)
+    ;
+
+  flip = f : x : y : f y x;
+
+  # isSuffixOf :: String -> String -> Bool
+  isSuffixOf =
+    s : xs :
+      let
+        sn = stringLength s;
+        xsn = stringLength xs;
+      in
+        xsn >= sn && substring (xsn - sn) sn xs == s ;
+
+  removeSuffix =
+    s : xs : substring 0 (stringLength xs - stringLength s) xs;
+
+  # setMap :: (String -> a -> b) -> Set String a -> [b]
+  #setMap = f: xs: map (k : f k (getAttr k xs)) (attrNames xs);
+
+  # setToList :: Set k a -> [a]
+  #setToList = setMap (_: v: v);
+
+  shell-escape =
+    stringAsChars (c: if c == "\n" then ''"${c}"'' else "\\${c}");
+}
diff --git a/modules/base.nix b/modules/base.nix
new file mode 100644
index 000000000..76c8b8970
--- /dev/null
+++ b/modules/base.nix
@@ -0,0 +1,17 @@
+{ config, pkgs, ... }:
+
+{
+  time.timeZone = "Europe/Berlin";
+
+  nix.maxJobs = 8;
+  nix.useChroot = true;
+  # TODO check if both are required:
+  nix.chrootDirs = [ "/etc/protocols" pkgs.iana_etc.outPath ];
+
+  nix.trustedBinaryCaches = [
+    "https://cache.nixos.org"
+    "http://cache.nixos.org"
+    "http://hydra.nixos.org"
+  ];
+
+}
diff --git a/modules/exim.nix b/modules/exim.nix
new file mode 100644
index 000000000..4a0232c8c
--- /dev/null
+++ b/modules/exim.nix
@@ -0,0 +1,122 @@
+{ config, pkgs, ... }:
+
+{
+  services.exim =
+    let
+      retiolumHostname = "wu.retiolum"; # TODO "${networking.hostName}.retiolum";
+    in
+      { enable = true;
+        config = ''
+          primary_hostname = ${retiolumHostname}
+          domainlist local_domains    = @ : localhost
+          domainlist relay_to_domains = *.retiolum
+          hostlist   relay_from_hosts = <; 127.0.0.1 ; ::1
+
+          acl_smtp_rcpt = acl_check_rcpt
+          acl_smtp_data = acl_check_data
+
+          host_lookup = *
+          rfc1413_hosts = *
+          rfc1413_query_timeout = 5s
+
+          log_file_path = syslog
+          syslog_timestamp = false
+          syslog_duplication = false
+
+          begin acl
+
+          acl_check_rcpt:
+            accept  hosts = :
+                    control = dkim_disable_verify
+
+            deny    message       = Restricted characters in address
+                    domains       = +local_domains
+                    local_parts   = ^[.] : ^.*[@%!/|]
+
+            deny    message       = Restricted characters in address
+                    domains       = !+local_domains
+                    local_parts   = ^[./|] : ^.*[@%!] : ^.*/\\.\\./
+
+            accept  local_parts   = postmaster
+                    domains       = +local_domains
+
+            #accept
+            #  hosts = *.retiolum
+            #  domains = *.retiolum
+            #  control = dkim_disable_verify
+
+            #require verify        = sender
+
+            accept  hosts         = +relay_from_hosts
+                    control       = submission
+                    control       = dkim_disable_verify
+
+            accept  authenticated = *
+                    control       = submission
+                    control       = dkim_disable_verify
+
+            require message = relay not permitted
+                    domains = +local_domains : +relay_to_domains
+
+            require verify = recipient
+
+            accept
+
+
+          acl_check_data:
+            accept
+
+
+          begin routers
+
+          retiolum:
+            driver = manualroute
+            domains = ! ${retiolumHostname} : *.retiolum
+            transport = remote_smtp
+            route_list = ^.* $0 byname
+            no_more
+
+          nonlocal:
+            debug_print = "R: nonlocal for $local_part@$domain"
+            driver = redirect
+            domains = ! +local_domains
+            allow_fail
+            data = :fail: Mailing to remote domains not supported
+            no_more
+
+          local_user:
+            # debug_print = "R: local_user for $local_part@$domain"
+            driver = accept
+            check_local_user
+          # local_part_suffix = +* : -*
+          # local_part_suffix_optional
+            transport = home_maildir
+            cannot_route_message = Unknown user
+
+
+          begin transports
+
+          remote_smtp:
+            driver = smtp
+
+          home_maildir:
+            driver = appendfile
+            maildir_format
+            directory = $home/Maildir
+            directory_mode = 0700
+            delivery_date_add
+            envelope_to_add
+            return_path_add
+          # group = mail
+          # mode = 0660
+
+          begin retry
+          *.retiolum             *           F,42d,1m
+          *                      *           F,2h,15m; G,16h,1h,1.5; F,4d,6h
+
+          begin rewrite
+
+          begin authenticators
+        '';
+      };
+}
diff --git a/modules/hosts.nix b/modules/hosts.nix
new file mode 100644
index 000000000..f59f87cc0
--- /dev/null
+++ b/modules/hosts.nix
@@ -0,0 +1,25 @@
+{ config, pkgs, ... }:
+
+{
+  networking.extraHosts =
+    ''
+      192.168.1.1 wrt.gg23 wrt
+      192.168.1.11 mors.gg23
+      192.168.1.12 uriel.gg23
+      192.168.1.23 raspi.gg23 raspi
+      192.168.1.37 wu.gg23
+      192.168.1.110 nomic.gg23
+      192.168.1.124 schnabeldrucker.gg23 schnabeldrucker
+
+      127.0.0.1  dev.zalora.sg www.dev.zalora.sg bob.dev.zalora.sg static.dev.zalora.sg
+      127.0.0.1  dev.zalora.com.my www.dev.zalora.com.my bob.dev.zalora.com.my static.dev.zalora.com.my
+      127.0.0.1  dev.zalora.com.ph www.dev.zalora.com.ph bob.dev.zalora.com.ph static.dev.zalora.com.ph
+      127.0.0.1  dev.zalora.vn www.dev.zalora.vn bob.dev.zalora.vn static.dev.zalora.vn
+      127.0.0.1  dev.zalora.co.id www.dev.zalora.co.id bob.dev.zalora.co.id static.dev.zalora.co.id
+      127.0.0.1  dev.zalora.co.th www.dev.zalora.co.th bob.dev.zalora.co.th static.dev.zalora.co.th
+      127.0.0.1  dev.zalora.com.hk www.dev.zalora.com.hk bob.dev.zalora.com.hk static.dev.zalora.com.hk
+
+      54.93.104.95 eu-dev.hk.zalora.net www.eu-dev.hk.zalora.net bob.eu-dev.hk.zalora.net static.eu-dev.hk.zalora.net
+      54.93.104.95 eu-dev.sg.zalora.net www.eu-dev.sg.zalora.net bob.eu-dev.sg.zalora.net static.eu-dev.sg.zalora.net
+    '';
+}
diff --git a/modules/iptables.nix b/modules/iptables.nix
new file mode 100644
index 000000000..ee4034321
--- /dev/null
+++ b/modules/iptables.nix
@@ -0,0 +1,69 @@
+{ config, pkgs, ... }:
+
+{
+  #
+  # iptables
+  #
+  networking.firewall.enable = false;
+  system.activationScripts.iptables =
+    let
+      log = false;
+      when = c: f: if c then f else "";
+    in
+      ''
+        ip4tables() { ${pkgs.iptables}/sbin/iptables "$@"; }
+        ip6tables() { ${pkgs.iptables}/sbin/ip6tables "$@"; }
+        ipXtables() { ip4tables "$@"; ip6tables "$@"; }
+
+        #
+        # nat
+        #
+
+        # reset tables
+        ipXtables -t nat -F
+        ipXtables -t nat -X
+
+        #
+        ipXtables -t nat -A PREROUTING -j REDIRECT ! -i retiolum -p tcp --dport ssh --to-ports 0
+        ipXtables -t nat -A PREROUTING -j REDIRECT -p tcp --dport 11423 --to-ports ssh
+
+        #
+        # filter
+        #
+
+        # reset tables
+        ipXtables -P INPUT DROP
+        ipXtables -P FORWARD DROP
+        ipXtables -F
+        ipXtables -X
+
+        # create custom chains
+        ipXtables -N Retiolum
+
+        # INPUT
+        ipXtables -A INPUT -j ACCEPT -m conntrack --ctstate RELATED,ESTABLISHED
+        ipXtables -A INPUT -j ACCEPT -i lo
+        ipXtables -A INPUT -j ACCEPT -p tcp --dport ssh -m conntrack --ctstate NEW
+        ipXtables -A INPUT -j ACCEPT -p tcp --dport http -m conntrack --ctstate NEW
+        ipXtables -A INPUT -j ACCEPT -p tcp --dport tinc -m conntrack --ctstate NEW
+        ipXtables -A INPUT -j ACCEPT -p tcp --dport smtp -m conntrack --ctstate NEW
+        ipXtables -A INPUT -j Retiolum -i retiolum
+        ${when log "ipXtables -A INPUT -j LOG --log-level info --log-prefix 'INPUT DROP '"}
+
+        # FORWARD
+        ${when log "ipXtables -A FORWARD -j LOG --log-level info --log-prefix 'FORWARD DROP '"}
+
+        # Retiolum
+        ip4tables -A Retiolum -j ACCEPT -p icmp --icmp-type echo-request
+        ip6tables -A Retiolum -j ACCEPT -p ipv6-icmp -m icmp6 --icmpv6-type echo-request
+
+
+        ${when log "ipXtables -A Retiolum -j LOG --log-level info --log-prefix 'REJECT '"}
+        ipXtables -A Retiolum -j REJECT -p tcp --reject-with tcp-reset
+        ip4tables -A Retiolum -j REJECT -p udp --reject-with icmp-port-unreachable
+        ip4tables -A Retiolum -j REJECT        --reject-with icmp-proto-unreachable
+        ip6tables -A Retiolum -j REJECT -p udp --reject-with icmp6-port-unreachable
+        ip6tables -A Retiolum -j REJECT
+
+      '';
+}
diff --git a/modules/nginx.nix b/modules/nginx.nix
new file mode 100644
index 000000000..8b420613b
--- /dev/null
+++ b/modules/nginx.nix
@@ -0,0 +1,30 @@
+{ config, pkgs, ... }:
+
+{
+  services.nginx =
+    let
+      name = config.networking.hostName;
+      qname = "${name}.retiolum";
+    in
+      {
+        enable = true;
+        httpConfig = ''
+          sendfile  on;
+          server {
+            listen      80;
+            server_name ${name} ${qname} localhost;
+            root /srv/http/${name};
+            location ~ ^/~(.+?)(/.*)?$ {
+              alias /home/$1/public_html$2;
+            }
+          }
+          types {
+            text/css css;
+            text/html html;
+            image/svg+xml svg;
+          }
+          default_type text/html;
+          charset utf-8;
+        '';
+      };
+}
diff --git a/modules/retiolum.nix b/modules/retiolum.nix
new file mode 100644
index 000000000..40112165b
--- /dev/null
+++ b/modules/retiolum.nix
@@ -0,0 +1,224 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+{
+
+  ###### interface
+
+  options = {
+    services.retiolum = {
+
+      enable = mkOption {
+        type = types.bool;
+        default = false;
+        description = "Enable tinc daemon for Retiolum.";
+      };
+
+      name = mkOption {
+        type = types.string;
+        default = config.networking.hostName;
+        # Description stolen from tinc.conf(5).
+        description = ''
+          This is the name which identifies this tinc daemon.  It must
+          be unique for the virtual private network this daemon will
+          connect to.  The Name may only consist of alphanumeric and
+          underscore characters.  If Name starts with a $, then the
+          contents of the environment variable that follows will be
+          used.  In that case, invalid characters will be converted to
+          underscores.  If Name is $HOST, but no such environment
+          variable exist, the hostname will be read using the
+          gethostnname() system call This is the name which identifies
+          the this tinc daemon.
+        '';
+      };
+
+      generateEtcHosts = mkOption {
+        type = types.string;
+        default = "both";
+        description = ''
+          If set to <literal>short</literal>, <literal>long</literal>, or <literal>both</literal>,
+          then generate entries in <filename>/etc/hosts</filename> from subnets.
+        '';
+      };
+
+      network = mkOption {
+        type = types.string;
+        default = "retiolum";
+        description = ''
+          The tinc network name.
+          It is used to generate long host entries,
+          derive the name of the user account under which tincd runs,
+          and name the TUN device.
+        '';
+      };
+
+      tincPackage = mkOption {
+        type = types.package;
+        default = pkgs.tinc;
+        description = "Tincd package to use.";
+      };
+
+      hosts = mkOption {
+        default = null;
+        description = ''
+          Hosts package or path to use.
+          If a path is given, then it will be used to generate an ad-hoc package.
+        '';
+      };
+
+      iproutePackage = mkOption {
+        type = types.package;
+        default = pkgs.iproute;
+        description = "Iproute2 package to use.";
+      };
+
+
+      privateKeyFile = mkOption {
+        # TODO if it's types.path then it gets copied to /nix/store with
+        #      bad unsafe permissions...
+        type = types.string;
+        default = "/etc/tinc/retiolum/rsa_key.priv";
+        description = "Generate file with <literal>tincd -K</literal>.";
+      };
+
+      connectTo = mkOption {
+        type = types.listOf types.string;
+        default = [ "fastpoke" "pigstarter" "kheurop" ];
+        description = "TODO describe me";
+      };
+
+    };
+  };
+
+
+  ###### implementation
+
+  config =
+    let
+      cfg = config.services.retiolum;
+      tinc = cfg.tincPackage;
+      hostsType = builtins.typeOf cfg.hosts;
+      hosts =
+        if hostsType == "package" then
+          # use package as is
+          cfg.hosts
+        else if hostsType == "path" then
+          # use path to generate a package
+          pkgs.stdenv.mkDerivation {
+            name = "custom-retiolum-hosts";
+            src = cfg.hosts;
+            installPhase = ''
+              mkdir $out
+              find . -name .git -prune -o -type f -print0 | xargs -0 cp --target-directory $out
+            '';
+          }
+        else
+          abort "The option `services.retiolum.hosts' must be set to a package or a path"
+        ;
+      iproute = cfg.iproutePackage;
+
+      retiolumExtraHosts = import (pkgs.runCommand "retiolum-etc-hosts"
+        { }
+        ''
+          generate() {
+            (cd ${hosts}
+              printf \'\'
+              for i in `ls`; do
+                sed -En '
+                  s|^ *Subnet *= *([^ /]*)(/[0-9]*)? *$|\1  '"$(hostnames $i)"'|p
+                ' $i
+              done | sort
+              printf \'\'
+            )
+          }
+
+          case ${cfg.generateEtcHosts} in
+            short)
+              hostnames() { echo "$1"; }
+              generate
+              ;;
+            long)
+              hostnames() { echo "$1.${cfg.network}"; }
+              generate
+              ;;
+            both)
+              hostnames() { echo "$1.${cfg.network} $1"; }
+              generate
+              ;;
+            *)
+              echo '""'
+              ;;
+          esac > $out
+        '');
+
+
+      confDir = pkgs.runCommand "retiolum" {
+        # TODO text
+        executable = true;
+        preferLocalBuild = true;
+      } ''
+        set -euf
+
+        mkdir -p $out
+
+        ln -s ${hosts} $out/hosts
+
+        cat > $out/tinc.conf <<EOF
+        Name = ${cfg.name}
+        Device = /dev/net/tun
+        Interface = ${cfg.network}
+        ${concatStrings (map (c : "ConnectTo = " + c + "\n") cfg.connectTo)}
+        PrivateKeyFile = ${cfg.privateKeyFile}
+        EOF
+
+        # source: krebscode/painload/retiolum/scripts/tinc_setup/tinc-up
+        cat > $out/tinc-up <<EOF
+        host=$out/hosts/${cfg.name}
+        ${iproute}/sbin/ip link set \$INTERFACE up
+
+        addr4=\$(sed -n 's|^ *Subnet *= *\(10[.][^ ]*\) *$|\1|p' \$host)
+        if [ -n "\$addr4" ];then
+            ${iproute}/sbin/ip -4 addr add \$addr4 dev \$INTERFACE
+            ${iproute}/sbin/ip -4 route add 10.243.0.0/16 dev \$INTERFACE
+        fi
+        addr6=\$(sed -n 's|^ *Subnet *= *\(42[:][^ ]*\) *$|\1|p' \$host)
+        ${iproute}/sbin/ip -6 addr add \$addr6 dev \$INTERFACE
+        ${iproute}/sbin/ip -6 route add 42::/16 dev \$INTERFACE
+        EOF
+
+        chmod +x $out/tinc-up
+      '';
+
+
+      user = cfg.network + "-tinc";
+
+    in
+
+      mkIf cfg.enable {
+        environment.systemPackages = [ tinc hosts iproute ];
+
+        networking.extraHosts = retiolumExtraHosts;
+
+        systemd.services.retiolum = {
+          description = "Tinc daemon for Retiolum";
+          after = [ "network.target" ];
+          wantedBy = [ "multi-user.target" ];
+          path = [ tinc iproute ];
+          serviceConfig = {
+            # TODO we cannot chroot (-R) b/c we use symlinks to hosts
+            #      and the private key.
+            ExecStart = "${tinc}/sbin/tincd -c ${confDir} -d 0 -U ${user} -D";
+            SyslogIdentifier = "retiolum-tincd";
+          };
+          restartIfChanged = true;
+        };
+
+        users.extraUsers = singleton {
+          name = user;
+          uid = 42; # TODO config.ids.uids.retiolum
+        };
+
+      };
+
+}
diff --git a/modules/tools.nix b/modules/tools.nix
new file mode 100644
index 000000000..4be84a6be
--- /dev/null
+++ b/modules/tools.nix
@@ -0,0 +1,101 @@
+{ config, pkgs, ... }:
+
+let
+  inherit (pkgs) lib stdenv;
+  inherit (lib.strings) concatStringsSep stringAsChars;
+  inherit (lib.attrsets) attrValues mapAttrs;
+  inherit (lib) makeSearchPath;
+  inherit (import ../lib { inherit pkgs; }) shell-escape;
+
+
+  # TODO make these scripts available in an maintenance shell
+
+
+  scripts = {
+
+    # just so we don't reboot accidentally
+    reboot =
+      ''
+        echo no reboot >&2
+        exit 23
+      '';
+
+    rebuild =
+      ''
+        nixpkgs=''${nixpkgs-/home/tv/src/nixpkgs}
+        nixos-rebuild \
+            --show-trace \
+            -I nixpkgs="$nixpkgs" \
+            switch \
+            2>&1 \
+          | sed ${shell-escape ''
+              s|"\(/home/tv/src/config/[^":]*\)"|\1|
+              s|^trace:\s*\(.*\)|\1|
+          ''}
+      '';
+
+  };
+
+  wrap = script:
+    ''
+      #! /bin/sh
+      set -euf
+      ${script}
+    '';
+      #lib=$lib
+      #export PATH=$bin:${makeSearchPath "bin" buildInputs}
+
+  buildScript = name: script:
+    builtins.trace "building ${name}"
+    ''
+      echo ${shell-escape script} > $bin/${shell-escape name}
+      chmod +x $bin/${shell-escape name}
+    '';
+
+
+
+  tools = pkgs.stdenv.mkDerivation rec {
+    name = "tools";
+    src = /var/empty;
+
+    buildInputs = [];
+
+
+    buildPhase =
+      ''
+        mkdir $out
+
+        bin=$out/bin
+        mkdir $bin
+
+        ${concatStringsSep "\n" (attrValues (mapAttrs buildScript scripts))}
+
+      '';
+      #''
+      #mkdir $out
+
+      #lib=$out/lib
+      #cp -r lib $lib
+
+      #bin=$out/bin
+      #mkdir $bin
+      #${concatStringsSep "\n" (attrValues (mapAttrs (name: script:
+      #    ''
+      #    {
+      #      echo '#! /bin/sh'
+      #      echo 'set -euf'
+      #      echo "lib=$lib"
+      #      echo "export PATH=$bin:${makeSearchPath "bin" buildInputs}"
+      #      echo ${shell-escape script}
+      #    } > $bin/${name}
+      #    chmod +x $bin/${name}
+      #    '') scripts))}
+      #'';
+    installPhase = ":";
+  };
+
+in
+
+{
+  environment.systemPackages = [ tools ];
+}
diff --git a/modules/urxvt.nix b/modules/urxvt.nix
new file mode 100644
index 000000000..a97581248
--- /dev/null
+++ b/modules/urxvt.nix
@@ -0,0 +1,24 @@
+{ pkgs, ... }:
+
+ with builtins;
+
+let
+  users = [ "tv" ];
+  urxvt = pkgs.rxvt_unicode;
+  mkService = user: {
+    description = "urxvt terminal daemon";
+    wantedBy = [ "multi-user.target" ];
+    restartIfChanged = false;
+    serviceConfig = {
+      Restart = "always";
+      User = user;
+      ExecStart = "${urxvt}/bin/urxvtd";
+    };
+  };
+
+in
+
+{
+  environment.systemPackages = [ urxvt ];
+  systemd.services = listToAttrs (map (u: { name = "${u}-urxvtd"; value = mkService u; }) users);
+}
diff --git a/modules/users.nix b/modules/users.nix
new file mode 100644
index 000000000..eec1defa5
--- /dev/null
+++ b/modules/users.nix
@@ -0,0 +1,226 @@
+{ config, pkgs, ... }:
+
+let
+  inherit (builtins) attrValues;
+  inherit (pkgs.lib) concatMap filterAttrs mapAttrs concatStringsSep;
+
+
+  users = {
+    tv = {
+      uid = 1337;
+      group = "users";
+      extraGroups = [
+        "audio"
+        "video"
+        "wheel"
+      ];
+    };
+
+    ff = {
+      uid = 13378001;
+      group = "tv-sub";
+      extraGroups = [
+        "audio"
+        "video"
+      ];
+    };
+
+    cr = {
+      uid = 13378002;
+      group = "tv-sub";
+      extraGroups = [
+        "audio"
+        "video"
+        "bumblebee"
+      ];
+    };
+
+    vimb = {
+      uid = 13378003;
+      group = "tv-sub";
+      extraGroups = [
+        "audio"
+        "video"
+        "bumblebee"
+      ];
+    };
+
+    fa = {
+      uid = 2300001;
+      group = "tv-sub";
+    };
+
+    rl = {
+      uid = 2300002;
+      group = "tv-sub";
+    };
+
+    btc-bitcoind = {
+      uid = 2301001;
+      group = "tv-sub";
+    };
+
+    btc-electrum = {
+      uid = 2301002;
+      group = "tv-sub";
+    };
+
+    ltc-litecoind = {
+      uid = 2301101;
+      group = "tv-sub";
+    };
+
+    eth = {
+      uid = 2302001;
+      group = "tv-sub";
+    };
+
+    emse-hsdb = {
+      uid = 4200101;
+      group = "tv-sub";
+    };
+
+    wine = {
+      uid = 13370400;
+      group = "tv-sub";
+      extraGroups = [
+        "audio"
+        "video"
+        "bumblebee"
+      ];
+    };
+
+    # dwarffortress
+    df = {
+      uid = 13370401;
+      group = "tv-sub";
+      extraGroups = [
+        "audio"
+        "video"
+        "bumblebee"
+      ];
+    };
+
+    # XXX visudo: Warning: Runas_Alias `FTL' referenced but not defined
+    FTL = {
+      uid = 13370402;
+      #group = "tv-sub";
+      extraGroups = [
+        "audio"
+        "video"
+        "bumblebee"
+      ];
+    };
+
+    freeciv = {
+      uid = 13370403;
+      group = "tv-sub";
+    };
+
+    xr = {
+      uid = 13370061;
+      group = "tv-sub";
+      extraGroups = [
+        "audio"
+        "video"
+      ];
+    };
+
+    "23" = {
+      uid = 13370023;
+      group = "tv-sub";
+    };
+
+    electrum = {
+      uid = 13370102;
+      group = "tv-sub";
+    };
+
+    Reaktor = {
+      uid = 4230010;
+      group = "tv-sub";
+    };
+
+    gitolite = {
+      uid = 7700;
+    };
+
+    skype = {
+      uid = 6660001;
+      group = "tv-sub";
+      extraGroups = [
+        "audio"
+      ];
+    };
+
+    onion = {
+      uid = 6660010;
+      group = "tv-sub";
+    };
+
+    zalora = {
+      uid = 1000301;
+      group = "tv-sub";
+      extraGroups = [
+        "audio"
+        # TODO remove vboxusers when hardening is active
+        "vboxusers"
+        "video"
+      ];
+    };
+
+  };
+
+
+  extraUsers =
+    mapAttrs (name: user: user // {
+      inherit name;
+      home = "/home/${name}";
+      createHome = true;
+      useDefaultShell = true;
+    }) users;
+
+
+  extraGroups = {
+    tv-sub.gid = 1337;
+  };
+
+
+  sudoers =
+    let
+      inherit (builtins) filter hasAttr;
+      inherit (import ../lib { inherit pkgs; }) concat isSuffixOf removeSuffix setToList;
+
+      hasMaster = { group ? "", ... }:
+        isSuffixOf "-sub" group;
+
+      masterOf = user : removeSuffix "-sub" user.group;
+    in
+    concatStringsSep "\n"
+      (map (u: "${masterOf u} ALL=(${u.name}) NOPASSWD: ALL")
+           (filter hasMaster (attrValues extraUsers)));
+
+in
+
+
+{
+  imports = [
+    <secrets/hashedPasswords.nix>
+  ];
+
+  users.defaultUserShell = "/run/current-system/sw/bin/bash";
+  users.extraGroups = extraGroups;
+  users.extraUsers = extraUsers;
+  users.mutableUsers = false;
+
+  #security.sudo.configFile = sudoers config.users.extraUsers;
+  security.sudo.configFile =
+    with builtins; trace
+    ''
+      OK
+    ''
+    sudoers;
+  security.sudo.extraConfig = ''
+    Defaults mailto="tv@wu.retiolum"
+  '';
+}
diff --git a/modules/xserver.nix b/modules/xserver.nix
new file mode 100644
index 000000000..c65201802
--- /dev/null
+++ b/modules/xserver.nix
@@ -0,0 +1,51 @@
+{ config, pkgs, ... }:
+
+{
+  services.xserver.enable = true;
+
+
+  #fonts.enableFontConfig = true;
+  #fonts.enableFontDir = true;
+  fonts.fonts = [
+    pkgs.xlibs.fontschumachermisc
+  ];
+  #services.xfs.enable = true;
+  #services.xserver.useXFS = "unix/:7100";
+
+  services.xserver.displayManager.desktopManagerHandlesLidAndPower = true;
+
+  #services.xserver.display = 11;
+  #services.xserver.tty = 11;
+  # services.xserver.layout = "us";
+  # services.xserver.xkbOptions = "eurosign:e";
+
+  # TODO this is host specific
+  services.xserver.synaptics = {
+    enable = true;
+    twoFingerScroll = true;
+    accelFactor = "0.035";
+    additionalOptions = ''
+      Option "FingerHigh" "60"
+      Option "FingerLow"  "60"
+    '';
+  };
+
+  #services.xserver.multitouch.enable = true;
+
+  services.xserver.windowManager.xmonad.extraPackages = hspkgs: with hspkgs; [
+    X11-xshape
+  ];
+  services.xserver.windowManager.xmonad.enable = true;
+  services.xserver.windowManager.xmonad.enableContribAndExtras = true;
+  services.xserver.windowManager.default = "xmonad";
+  services.xserver.desktopManager.default = "none";
+  services.xserver.desktopManager.xterm.enable = false;
+
+  services.xserver.displayManager.slim.enable = true;
+  #services.xserver.displayManager.auto.enable = true;
+  #services.xserver.displayManager.auto.user = "tv";
+  #services.xserver.displayManager.job.logsXsession = true;
+
+
+  services.xserver.vaapiDrivers = [ pkgs.vaapiIntel ];
+}
diff --git a/wu.nix b/wu.nix
new file mode 100644
index 000000000..de435fc3a
--- /dev/null
+++ b/wu.nix
@@ -0,0 +1,457 @@
+{ config, pkgs, ... }:
+
+with (import ./lib { inherit pkgs; });
+
+{
+  imports = [
+    ./modules/base.nix
+    ./modules/retiolum.nix
+    ./modules/urxvt.nix
+    ./modules/iptables.nix
+    ./modules/users.nix
+    ./modules/tools.nix
+    ./modules/hosts.nix
+    ./modules/xserver.nix
+    ./modules/exim.nix
+    ./modules/nginx.nix
+  ];
+
+  services.udev.extraRules = ''
+    SUBSYSTEM=="net", ATTR{address}=="00:90:f5:da:aa:c3", NAME="en0"
+    SUBSYSTEM=="net", ATTR{address}=="a0:88:b4:1b:ae:6c", NAME="wl0"
+
+    # for jack
+    KERNEL=="rtc0", GROUP="audio"
+    KERNEL=="hpet", GROUP="audio"
+  '';
+
+  #services.virtualbox.enable = true;
+  #services.virtualboxGuest.enable = false;
+  services.virtualboxHost.enable = true;
+  #services.virtualboxHost.addNetworkInterface = false;
+  #systemd.services.vboxnet =
+  #  let
+  #    remove_vboxnets = ''
+  #      for i in $(cd /sys/class/net && ls | grep ^vboxnet); do
+  #        VBoxManage hostonlyif remove $i
+  #      done
+  #    '';
+  #  in {
+  #    wantedBy = [ "multi-user.target" ];
+  #    requires = [ "dev-vboxnetctl.device" ];
+  #    after = [ "dev-vboxnetctl.device" ];
+  #    path = with pkgs; [
+  #      linuxPackages.virtualbox
+  #      nettools
+  #    ];
+  #    postStop = remove_vboxnets;
+  #    script = ''
+  #      ${remove_vboxnets} # just in case...
+  #      VBoxManage hostonlyif create # vboxnet0
+  #      ifconfig vboxnet0 up 169.254.13.37/16
+  #    '';
+  #    serviceConfig = {
+  #      Type = "oneshot";
+  #      PrivateTmp = true;
+  #      RemainAfterExit = "yes";
+  #    };
+  #    environment.VBOX_USER_HOME = "/tmp";
+  #  };
+
+
+  services.bitlbee.enable = true;
+
+  #services.rabbitmq = {
+  #  enable = true;
+  #  cookie = "f00f";
+  #  plugins = [
+  #    "rabbitmq_management"
+  #  ];
+  #};
+
+
+  #services.elasticsearch.enable = true;
+
+  #services.cgserver = {