Merge remote-tracking branch 'lass/18.09' into 18.09

71 files changed, 552 insertions, 1729 deletions

diff --git a/.gitmodules b/.gitmodules
index c96fec739..f35a9250d 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,6 @@
 [submodule "submodules/nix-writers"]
 	path = submodules/nix-writers
 	url = http://cgit.krebsco.de/nix-writers
+[submodule "submodules/krops"]
+	path = submodules/krops
+	url = https://cgit.krebsco.de/krops
diff --git a/jeschli/1systems/bln/config.nix b/jeschli/1systems/bln/config.nix
deleted file mode 100644
index 6e3c3bec8..000000000
--- a/jeschli/1systems/bln/config.nix
+++ /dev/null
@@ -1,173 +0,0 @@
-{ config, lib, pkgs, ... }:
-# bln config file
-{
-  imports = [
-    ./hardware-configuration.nix
-    <stockholm/jeschli>
-    <stockholm/jeschli/2configs/virtualbox.nix>
-    <stockholm/jeschli/2configs/urxvt.nix>
-    <stockholm/jeschli/2configs/emacs.nix>
-    <stockholm/jeschli/2configs/xdg.nix>
-    <stockholm/jeschli/2configs/xserver>
-#    <stockholm/jeschli/1systems/bln/dcso-vpn.nix>
-    <stockholm/jeschli/2configs/officevpn.nix>
-  ];
-
-#  boot.loader.systemd-boot.enable = true;
-  boot.loader.efi.canTouchEfiVariables = true;
-  boot.loader.efi.efiSysMountPoint = "/boot";
-  boot.loader.grub = {
-    devices = [ "nodev" ];
-    efiSupport = true;
-    enable = true;
-    extraEntries = ''
-      menuentry "Debian" {
-        insmod ext2
-        insmod chain
-        chainloader /EFI/debian/grubx64.efi
-      }
-    '';
-    version = 2;
-  };
-
-  jeschliFontSize = 20;
-
-  environment.shellAliases = {
-    n = "nix-shell";
-    gd = "cd /home/markus/go/src/gitlab.dcso.lolcat";
-    gh = "cd /home/markus/go/src/github.com";
-    stocki = pkgs.writeDash "deploy" ''
-      cd ~/stockholm
-      LOGNAME=jeschli exec nix-shell -I stockholm="$PWD" --run 'deploy  --system="bln"'
-    '';
-  };
-  networking.hostName = lib.mkForce "BLN02NB0232";
-  networking.networkmanager.enable = true;
-
-  # Set your time zone.
-  time.timeZone = "Europe/Berlin";
-
-  # Setup Packages
-  nixpkgs.config.allowUnfree = true;
-  environment.variables = { GOROOT= [ "${pkgs.go.out}/share/go" ]; };
-  environment.systemPackages = with pkgs; [
-    termite
-  # system helper
-    ag
-    copyq
-    dmenu
-    git
-    tig
-    i3lock
-    keepass
-    networkmanagerapplet
-    rsync
-    terminator
-    tmux
-    wget
-    rxvt_unicode
-  # editors
-    emacs
-  # databases
-    sqlite
-  # internet
-    thunderbird
-    chromium
-    google-chrome
-  # programming languages
-    elmPackages.elm
-    go
-    gcc
-    ghc
-    python35
-    python35Packages.pip
-  # go tools
-    golint
-    gotools
-  # dev tools
-    gnumake
-    jetbrains.pycharm-professional
-    jetbrains.webstorm
-    jetbrains.goland
-    jetbrains.datagrip
-    texlive.combined.scheme-full
-    pandoc
-    redis
-    vagrant
-  # document viewer
-    zathura
-
-    samba
-  ];
-
-
-  programs.bash.enableCompletion = true;
-  programs.vim.defaultEditor = true;
-
-  services.openssh.enable = true;
-
-  # Enable CUPS to print documents.
-  services.printing.enable = true;
-  services.printing.drivers = [ pkgs.postscript-lexmark ];
-
-  services.redis.enable = true;
-
-  services.xserver = {
-
-    desktopManager.session = lib.mkForce [];
-
-    enable = true;
-    display = 11;
-    tty = 11;
-
-    dpi = 200;
-
-    videoDrivers = [ "nvidia" ];
-    synaptics = {
-      enable = false;
-    };
-
-  };
-
-
-  users.extraUsers.jeschli = {
-    isNormalUser = true;
-    extraGroups = ["docker" "vboxusers" "audio"];
-    uid = 1000;
-  };
-
-  system.stateVersion = "17.09";
-  # Gogland Debugger workaround
-  #  nixpkgs.config.packageOverrides = super: {
-  #    idea.gogland = lib.overrideDerivation super.idea.gogland (attrs: {
-  #      postFixup = ''
-  #	interp="$(cat $NIX_CC/nix-support/dynamic-linker)"
-  #	patchelf --set-interpreter $interp $out/gogland*/plugins/intellij-go-plugin/lib/dlv/linux/dlv
-  #        chmod +x $out/gogland*/plugins/intellij-go-plugin/lib/dlv/linux/dlv
-  #     '';
-  #    });
-  #  };
-
-  virtualisation.docker.enable = true;
-
-  # DCSO Certificates
-  security.pki.certificateFiles = [
-    (pkgs.fetchurl { url = "http://pki.dcso.de/ca/PEM/DCSOCAROOTC1G1.pem"; sha256 = "006j61q2z44z6d92638iin6r46r4cj82ipwm37784h34i5x4mp0d"; })
-    (pkgs.fetchurl { url = "http://pki.dcso.de/ca/PEM/DCSOCAROOTC2G1.pem"; sha256 = "1nkd1rjcn02q9xxjg7sw79lbwy08i7hb4v4pn98djknvcmplpz5m"; })
-    (pkgs.fetchurl { url = "http://pki.dcso.de/ca/PEM/DCSOCAROOTC3G1.pem"; sha256 = "094m12npglnnv1nf1ijcv70p8l15l00id44qq7rwynhcgxi5539i"; })
-
-    (pkgs.fetchurl { url = "http://pki.dcso.de/ca/PEM/DCSOCACOMPC2G1.pem"; sha256 = "1anfncdf5xsp219kryncv21ra87flpzcjwcc85hzvlwbxhid3g4x"; })
-    (pkgs.fetchurl { url = "http://pki.dcso.de/ca/PEM/DCSOCACOMPC3G1.pem"; sha256 = "035kkfizyl5dndj7rhvmy91rr75lakqbqgjx4dpiw0kqq369mz8r"; })
-    (pkgs.fetchurl { url = "http://pki.dcso.de/ca/PEM/DCSOCAIDENC2G1.pem"; sha256 = "14fpzx1qjs9ws9sz0y7pb6j40336xlckkqcm2rc5j86yn7r22lp7"; })
-    (pkgs.fetchurl { url = "http://pki.dcso.de/ca/PEM/DCSOCAIDENC3G1.pem"; sha256 = "1yjl3kyw4chc8vw7bnqac2h9vn8dxryw7lr7i03lqi9sdvs4108s"; })
-  ];
-
-
-  hardware.bluetooth.enable = true;
-  krebs.build.host = config.krebs.hosts.bln;
-
-  networking.interfaces.enp0s31f6.ipv4.addresses = [
-    { address = "10.99.23.2"; prefixLength = 24; }
-  ];
-
-}
diff --git a/jeschli/1systems/bln/dcso-vpn.nix b/jeschli/1systems/bln/dcso-vpn.nix
deleted file mode 100644
index 0a5623bf0..000000000
--- a/jeschli/1systems/bln/dcso-vpn.nix
+++ /dev/null
@@ -1,44 +0,0 @@
-with import <stockholm/lib>;
-{ ... }:
-
-{
-
-  users.extraUsers = {
-    dcsovpn = rec {
-      name = "dcsovpn";
-      uid = genid "dcsovpn";
-      description = "user for running dcso openvpn";
-      home = "/home/${name}";
-    };
-  };
-
-  users.extraGroups.dcsovpn.gid = genid "dcsovpn";
-
-  services.openvpn.servers = {
-    dcso = {
-      config = ''
-        client
-        dev tun
-        tun-mtu 1356
-        mssfix
-        proto udp
-        float
-        remote 217.111.55.41 1194
-        nobind
-        user dcsovpn
-        group dcsovpn
-        persist-key
-        persist-tun
-        ca ${toString <secrets/dcsovpn/ca.pem>}
-        cert ${toString <secrets/dcsovpn/cert.pem>}
-        key ${toString <secrets/dcsovpn/cert.key>}
-        verb 3
-        mute 20
-        auth-user-pass ${toString <secrets/dcsovpn/login.txt>}
-        route-method exe
-        route-delay 2
-      '';
-      updateResolvConf = true;
-    };
-  };
-}
diff --git a/jeschli/1systems/bln/hardware-configuration.nix b/jeschli/1systems/bln/hardware-configuration.nix
deleted file mode 100644
index 35f0b3bca..000000000
--- a/jeschli/1systems/bln/hardware-configuration.nix
+++ /dev/null
@@ -1,35 +0,0 @@
-{ config, lib, pkgs, ... }:
-
-{
-  imports =
-    [ <nixpkgs/nixos/modules/installer/scan/not-detected.nix>
-    ];
-
-  boot.initrd.availableKernelModules = [ "xhci_pci" "nvme" "usb_storage" "sr_mod" "rtsx_pci_sdmmc" ];
-  boot.kernelModules = [ "kvm-intel" ];
-  boot.extraModulePackages = [ ];
-
-  boot.initrd.luks.devices.crypted.device = "/dev/disk/by-uuid/25534522-5748-4dcc-a5ca-80a3ac70f59d";
-
-  fileSystems."/" =
-    { device = "/dev/disk/by-uuid/496c8889-96db-446d-9bac-60d4347faeac";
-      fsType = "ext4";
-    };
-
-  fileSystems."/home" =
-    { device = "/dev/disk/by-uuid/2785adf5-a99e-49d7-86d6-99f393f457ea";
-      fsType = "ext4";
-    };
-
-  fileSystems."/boot" =
-    { device = "/dev/disk/by-uuid/927E-01A0";
-      fsType = "vfat";
-    };
-
-  swapDevices = [ ];
-
-  nix.maxJobs = lib.mkDefault 8;
-  powerManagement.cpuFreqGovernor = "powersave";
-
-  hardware.pulseaudio.enable = true;
-}
diff --git a/jeschli/1systems/brauerei/config.nix b/jeschli/1systems/brauerei/config.nix
index 4cd544a66..98db60e4f 100644
--- a/jeschli/1systems/brauerei/config.nix
+++ b/jeschli/1systems/brauerei/config.nix
@@ -37,6 +37,11 @@
       cd ~/stockholm
       exec nix-shell -I stockholm="$PWD" --run 'deploy  --system="brauerei"'
     '';
+    deploy = pkgs.writeDash "deploy" ''
+      set -eu
+      export SYSTEM="$1"
+      $(nix-build $HOME/stockholm/jeschli/krops.nix --no-out-link --argstr name "$SYSTEM" -A deploy)
+    '';
   };
 
   environment.systemPackages = with pkgs; [
@@ -114,6 +119,8 @@
     # Don't install feh into systemPackages
     # refs <nixpkgs/nixos/modules/services/x11/desktop-managers>
     desktopManager.session = lib.mkForce [];
+    displayManager.lightdm.enable = lib.mkForce false;
+    displayManager.job.execCmd = lib.mkForce "derp";
 
     enable = true;
     display = 11;
@@ -138,6 +145,15 @@
     isNormalUser = true;
     uid = 1001; # TODO genid
   };
+  users.users.dev = {
+    isNormalUser = true;
+    openssh.authorizedKeys.keys = [
+      config.krebs.users.lass.pubkey
+      "ssh-rsa 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 lhebendanz@nixos"
+      "ssh-rsa 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 jeschli@nixos"
+    ];
+  };
+
 
   users.users.root.openssh.authorizedKeys.keys = [
     "ssh-rsa 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 jeschli@nixos"
diff --git a/jeschli/2configs/emacs.nix b/jeschli/2configs/emacs.nix
index 3bd2dbfc4..5fc887477 100644
--- a/jeschli/2configs/emacs.nix
+++ b/jeschli/2configs/emacs.nix
@@ -67,7 +67,6 @@ let
   emacsWithCustomPackages = (pkgs.emacsPackagesNgGen pkgs.emacs).emacsWithPackages (epkgs: [
     epkgs.melpaPackages.evil
     epkgs.melpaStablePackages.magit
-    epkgs.melpaPackages.mmm-mode
     epkgs.melpaPackages.nix-mode
     epkgs.melpaPackages.go-mode
     epkgs.melpaPackages.google-this
diff --git a/jeschli/5pkgs/simple/xmonad-jeschli/default.nix b/jeschli/5pkgs/simple/xmonad-jeschli/default.nix
index 88856021c..4ebd98f09 100644
--- a/jeschli/5pkgs/simple/xmonad-jeschli/default.nix
+++ b/jeschli/5pkgs/simple/xmonad-jeschli/default.nix
@@ -222,7 +222,7 @@ myKeys conf = Map.fromList $
 pagerConfig :: PagerConfig
 pagerConfig = def
     { pc_font           = myFont
-    , pc_cellwidth      = 256
+    , pc_cellwidth      = 100
     --, pc_cellheight     = 36 -- TODO automatically keep screen aspect
     --, pc_borderwidth    = 1
     --, pc_matchcolor     = "#f0b000"
diff --git a/krebs/2configs/buildbot-stockholm.nix b/krebs/2configs/buildbot-stockholm.nix
index d10fb7203..5784f2cdc 100644
--- a/krebs/2configs/buildbot-stockholm.nix
+++ b/krebs/2configs/buildbot-stockholm.nix
@@ -22,6 +22,12 @@
         "http://cgit.ni.r/disko"
         "http://cgit.prism.r/disko"
       ];
+      krops.urls = [
+        "http://cgit.hotdog.r/krops"
+        "http://cgit.ni.r/krops"
+        "http://cgit.prism.r/krops"
+        "https://git.ingolf-wagner.de/krebs/krops.git"
+      ];
       nix_writers.urls = [
         "http://cgit.hotdog.r/nix-writers"
         "http://cgit.ni.r/nix-writers"
diff --git a/krebs/2configs/ircd.nix b/krebs/2configs/ircd.nix
index 962dbf49c..65972aacc 100644
--- a/krebs/2configs/ircd.nix
+++ b/krebs/2configs/ircd.nix
@@ -5,7 +5,7 @@
     6667 6669
   ];
 
-  services.charybdis = {
+  krebs.charybdis = {
     enable = true;
     motd = ''
       hello
diff --git a/krebs/3modules/charybdis.nix b/krebs/3modules/charybdis.nix
new file mode 100644
index 000000000..f4a7c1313
--- /dev/null
+++ b/krebs/3modules/charybdis.nix
@@ -0,0 +1,110 @@
+{ config, lib, pkgs, ... }:
+
+let
+  inherit (lib) mkEnableOption mkIf mkOption singleton types;
+  inherit (pkgs) coreutils charybdis;
+  cfg = config.krebs.charybdis;
+
+  configFile = pkgs.writeText "charybdis.conf" ''
+    ${cfg.config}
+  '';
+in
+
+{
+
+  ###### interface
+
+  options = {
+
+    krebs.charybdis = {
+
+      enable = mkEnableOption "Charybdis IRC daemon";
+
+      config = mkOption {
+        type = types.string;
+        description = ''
+          Charybdis IRC daemon configuration file.
+        '';
+      };
+
+      statedir = mkOption {
+        type = types.string;
+        default = "/var/lib/charybdis";
+        description = ''
+          Location of the state directory of charybdis.
+        '';
+      };
+
+      user = mkOption {
+        type = types.string;
+        default = "ircd";
+        description = ''
+          Charybdis IRC daemon user.
+        '';
+      };
+
+      group = mkOption {
+        type = types.string;
+        default = "ircd";
+        description = ''
+          Charybdis IRC daemon group.
+        '';
+      };
+
+      motd = mkOption {
+        type = types.nullOr types.lines;
+        default = null;
+        description = ''
+          Charybdis MOTD text.
+
+          Charybdis will read its MOTD from /etc/charybdis/ircd.motd .
+          If set, the value of this option will be written to this path.
+        '';
+      };
+
+    };
+
+  };
+
+
+  ###### implementation
+
+  config = mkIf cfg.enable (lib.mkMerge [
+    {
+      users.users = singleton {
+        name = cfg.user;