Merge remote-tracking branch 'mb/master'

6 files changed, 814 insertions, 0 deletions

diff --git a/mb/2configs/default.nix b/mb/2configs/default.nix
index ab11495c8..3066d1c36 100644
--- a/mb/2configs/default.nix
+++ b/mb/2configs/default.nix
@@ -21,6 +21,29 @@ with import <stockholm/lib>;
             "video"
             "fuse"
             "wheel"
+            "kvm"
+            "qemu-libvirtd"
+            "libvirtd"
+          ];
+          openssh.authorizedKeys.keys = [
+            config.krebs.users.mb.pubkey
+          ];
+        };
+        xo = {
+          name = "xo";
+          uid = 2323;
+          home = "/home/xo";
+          group = "users";
+          createHome = true;
+          shell = "/run/current-system/sw/bin/fish";
+          extraGroups = [
+            "audio"
+            "video"
+            "fuse"
+            "wheel"
+            "kvm"
+            "qemu-libvirtd"
+            "libvirtd"
           ];
           openssh.authorizedKeys.keys = [
             config.krebs.users.mb.pubkey
diff --git a/mb/2configs/google-compute-config.nix b/mb/2configs/google-compute-config.nix
new file mode 100644
index 000000000..b201bd4b8
--- /dev/null
+++ b/mb/2configs/google-compute-config.nix
@@ -0,0 +1,231 @@
+{ config, lib, pkgs, ... }:
+with lib;
+let
+  gce = pkgs.google-compute-engine;
+in
+{
+  imports = [
+    ./headless.nix
+    ./qemu-guest.nix
+  ];
+
+  fileSystems."/" = {
+    device = "/dev/disk/by-label/nixos";
+    autoResize = true;
+  };
+
+  boot.growPartition = true;
+  boot.kernelParams = [ "console=ttyS0" "panic=1" "boot.panic_on_fail" ];
+  boot.initrd.kernelModules = [ "virtio_scsi" ];
+  boot.kernelModules = [ "virtio_pci" "virtio_net" ];
+
+  # Generate a GRUB menu.  Amazon's pv-grub uses this to boot our kernel/initrd.
+  boot.loader.grub.device = "/dev/sda";
+  boot.loader.timeout = 0;
+
+  # Don't put old configurations in the GRUB menu.  The user has no
+  # way to select them anyway.
+  boot.loader.grub.configurationLimit = 0;
+
+  # Allow root logins only using the SSH key that the user specified
+  # at instance creation time.
+  #services.openssh.enable = true;
+  #services.openssh.permitRootLogin = "prohibit-password";
+  #services.openssh.passwordAuthentication = mkDefault false;
+
+  # Use GCE udev rules for dynamic disk volumes
+  services.udev.packages = [ gce ];
+
+  # Force getting the hostname from Google Compute.
+  networking.hostName = mkDefault "";
+
+  # Always include cryptsetup so that NixOps can use it.
+  environment.systemPackages = [ pkgs.cryptsetup ];
+
+  # Make sure GCE image does not replace host key that NixOps sets
+  environment.etc."default/instance_configs.cfg".text = lib.mkDefault ''
+    [InstanceSetup]
+    set_host_keys = false
+  '';
+
+  # Rely on GCP's firewall instead
+  networking.firewall.enable = mkDefault false;
+
+  # Configure default metadata hostnames
+  networking.extraHosts = ''
+    169.254.169.254 metadata.google.internal metadata
+  '';
+
+  networking.timeServers = [ "metadata.google.internal" ];
+
+  networking.usePredictableInterfaceNames = false;
+
+  # GC has 1460 MTU
+  networking.interfaces.eth0.mtu = 1460;
+
+  security.googleOsLogin.enable = true;
+
+  systemd.services.google-clock-skew-daemon = {
+    description = "Google Compute Engine Clock Skew Daemon";
+    after = [
+      "network.target"
+      "google-instance-setup.service"
+      "google-network-setup.service"
+    ];
+    requires = ["network.target"];
+    wantedBy = ["multi-user.target"];
+    serviceConfig = {
+      Type = "simple";
+      ExecStart = "${gce}/bin/google_clock_skew_daemon --debug";
+    };
+  };
+
+  systemd.services.google-instance-setup = {
+    description = "Google Compute Engine Instance Setup";
+    after = ["local-fs.target" "network-online.target" "network.target" "rsyslog.service"];
+    before = ["sshd.service"];
+    wants = ["local-fs.target" "network-online.target" "network.target"];
+    wantedBy = [ "sshd.service" "multi-user.target" ];
+    path = with pkgs; [ ethtool openssh ];
+    serviceConfig = {
+      ExecStart = "${gce}/bin/google_instance_setup --debug";
+      Type = "oneshot";
+    };
+  };
+
+  systemd.services.google-network-daemon = {
+    description = "Google Compute Engine Network Daemon";
+    after = ["local-fs.target" "network-online.target" "network.target" "rsyslog.service" "google-instance-setup.service"];
+    wants = ["local-fs.target" "network-online.target" "network.target"];
+    requires = ["network.target"];
+    partOf = ["network.target"];
+    wantedBy = [ "multi-user.target" ];
+    path = with pkgs; [ iproute ];
+    serviceConfig = {
+      ExecStart = "${gce}/bin/google_network_daemon --debug";
+    };
+  };
+
+  systemd.services.google-shutdown-scripts = {
+    description = "Google Compute Engine Shutdown Scripts";
+    after = [
+      "local-fs.target"
+      "network-online.target"
+      "network.target"
+      "rsyslog.service"
+      "systemd-resolved.service"
+      "google-instance-setup.service"
+      "google-network-daemon.service"
+    ];
+    wants = [ "local-fs.target" "network-online.target" "network.target"];
+    wantedBy = [ "multi-user.target" ];
+    serviceConfig = {
+      ExecStart = "${pkgs.coreutils}/bin/true";
+      ExecStop = "${gce}/bin/google_metadata_script_runner --debug --script-type shutdown";
+      Type = "oneshot";
+      RemainAfterExit = true;
+      TimeoutStopSec = "infinity";
+    };
+  };
+
+  systemd.services.google-startup-scripts = {
+    description = "Google Compute Engine Startup Scripts";
+    after = [
+      "local-fs.target"
+      "network-online.target"
+      "network.target"
+      "rsyslog.service"
+      "google-instance-setup.service"
+      "google-network-daemon.service"
+    ];
+    wants = ["local-fs.target" "network-online.target" "network.target"];
+    wantedBy = [ "multi-user.target" ];
+    serviceConfig = {
+      ExecStart = "${gce}/bin/google_metadata_script_runner --debug --script-type startup";
+      KillMode = "process";
+      Type = "oneshot";
+    };
+  };
+
+
+  # Settings taken from https://github.com/GoogleCloudPlatform/compute-image-packages/blob/master/google_config/sysctl/11-gce-network-security.conf
+  boot.kernel.sysctl = {
+    # Turn on SYN-flood protections.  Starting with 2.6.26, there is no loss
+    # of TCP functionality/features under normal conditions.  When flood
+    # protections kick in under high unanswered-SYN load, the system
+    # should remain more stable, with a trade off of some loss of TCP
+    # functionality/features (e.g. TCP Window scaling).
+    "net.ipv4.tcp_syncookies" = mkDefault "1";
+
+    # ignores source-routed packets
+    "net.ipv4.conf.all.accept_source_route" = mkDefault "0";
+
+    # ignores source-routed packets
+    "net.ipv4.conf.default.accept_source_route" = mkDefault "0";
+
+    # ignores ICMP redirects
+    "net.ipv4.conf.all.accept_redirects" = mkDefault "0";
+
+    # ignores ICMP redirects
+    "net.ipv4.conf.default.accept_redirects" = mkDefault "0";
+
+    # ignores ICMP redirects from non-GW hosts
+    "net.ipv4.conf.all.secure_redirects" = mkDefault "1";
+
+    # ignores ICMP redirects from non-GW hosts
+    "net.ipv4.conf.default.secure_redirects" = mkDefault "1";
+
+    # don't allow traffic between networks or act as a router
+    "net.ipv4.ip_forward" = mkDefault "0";
+
+    # don't allow traffic between networks or act as a router
+    "net.ipv4.conf.all.send_redirects" = mkDefault "0";
+
+    # don't allow traffic between networks or act as a router
+    "net.ipv4.conf.default.send_redirects" = mkDefault "0";
+
+    # reverse path filtering - IP spoofing protection
+    "net.ipv4.conf.all.rp_filter" = mkDefault "1";
+
+    # reverse path filtering - IP spoofing protection
+    "net.ipv4.conf.default.rp_filter" = mkDefault "1";
+
+    # ignores ICMP broadcasts to avoid participating in Smurf attacks
+    "net.ipv4.icmp_echo_ignore_broadcasts" = mkDefault "1";
+
+    # ignores bad ICMP errors
+    "net.ipv4.icmp_ignore_bogus_error_responses" = mkDefault "1";
+
+    # logs spoofed, source-routed, and redirect packets
+    "net.ipv4.conf.all.log_martians" = mkDefault "1";
+
+    # log spoofed, source-routed, and redirect packets
+    "net.ipv4.conf.default.log_martians" = mkDefault "1";
+
+    # implements RFC 1337 fix
+    "net.ipv4.tcp_rfc1337" = mkDefault "1";
+
+    # randomizes addresses of mmap base, heap, stack and VDSO page
+    "kernel.randomize_va_space" = mkDefault "2";
+
+    # Reboot the machine soon after a kernel panic.
+    "kernel.panic" = mkDefault "10";
+
+    ## Not part of the original config
+
+    # provides protection from ToCToU races
+    "fs.protected_hardlinks" = mkDefault "1";
+
+    # provides protection from ToCToU races
+    "fs.protected_symlinks" = mkDefault "1";
+
+    # makes locating kernel addresses more difficult
+    "kernel.kptr_restrict" = mkDefault "1";
+
+    # set ptrace protections
+    "kernel.yama.ptrace_scope" = mkOverride 500 "1";
+
+    # set perf only available to root
+    "kernel.perf_event_paranoid" = mkDefault "2";
+  };
+}
diff --git a/mb/2configs/headless.nix b/mb/2configs/headless.nix
new file mode 100644
index 000000000..46a9b6a7d
--- /dev/null
+++ b/mb/2configs/headless.nix
@@ -0,0 +1,25 @@
+# Common configuration for headless machines (e.g., Amazon EC2
+# instances).
+
+{ lib, ... }:
+
+with lib;
+
+{
+  boot.vesa = false;
+
+  # Don't start a tty on the serial consoles.
+  systemd.services."serial-getty@ttyS0".enable = false;
+  systemd.services."serial-getty@hvc0".enable = false;
+  systemd.services."getty@tty1".enable = false;
+  systemd.services."autovt@".enable = false;
+
+  # Since we can't manually respond to a panic, just reboot.
+  boot.kernelParams = [ "panic=1" "boot.panic_on_fail" ];
+
+  # Don't allow emergency mode, because we don't have a console.
+  systemd.enableEmergencyMode = false;
+
+  # Being headless, we don't need a GRUB splash image.
+  boot.loader.grub.splashImage = null;
+}
diff --git a/mb/2configs/neovimrc b/mb/2configs/neovimrc
new file mode 100644
index 000000000..8dbeaec7b
--- /dev/null
+++ b/mb/2configs/neovimrc
@@ -0,0 +1,446 @@
+
+"*****************************************************************************
+"" Functions
+"*****************************************************************************
+
+function! GetBufferList()
+    redir =>buflist
+    silent! ls!
+    redir END
+    return buflist
+endfunction
+
+function! ToggleList(bufname, pfx)
+    let buflist = GetBufferList()
+    for bufnum in map(filter(split(buflist, '\n'), 'v:val =~ "'.a:bufname.'"'), 'str2nr(matchstr(v:val, "\\d\\+"))')
+        if bufwinnr(bufnum) != -1
+            exec(a:pfx.'close')
+            return
+        endif
+    endfor
+    if a:pfx == 'l' && len(getloclist(0)) == 0
+        echohl ErrorMsg
+        echo "Location List is Empty."
+        return
+    endif
+    let winnr = winnr()
+    exec(a:pfx.'open')
+    if winnr() != winnr
+        wincmd p
+    endif
+endfunction
+
+
+"*****************************************************************************
+"" Basic Setup
+"*****************************************************************************"
+" General
+let no_buffers_menu=1
+syntax on
+set ruler
+set number
+set mousemodel=popup
+set t_Co=256
+set guioptions=egmrti
+set gfn=Monospace\ 10
+
+" TODO: Testing if this works against automatically setting paste mode
+" Issue: https://github.com/neovim/neovim/issues/7994
+au InsertLeave * set nopaste
+
+
+" undofile - This allows you to use undos after exiting and restarting
+" This, like swap and backups, uses .vim-undo first, then ~/.vim/undo
+" :help undo-persistence
+if exists("+undofile")
+    if isdirectory($HOME . '/.vim/undo') == 0
+        :silent !mkdir -p ~/.vim/undo > /dev/null 2>&1
+    endif
+    set undodir=./.vim-undo//
+    set undodir+=~/.vim/undo//
+    set undofile
+endif
+
+" Encoding
+set encoding=utf-8
+set fileencoding=utf-8
+set fileencodings=utf-8
+set bomb
+set binary
+
+" Fix backspace indent
+set backspace=indent,eol,start
+
+" Tabs. May be overriten by autocmd rules
+set tabstop=4
+set softtabstop=0
+set shiftwidth=4
+set expandtab
+
+" Map leader to ,
+let mapleader=','
+
+" Enable hidden buffers
+set hidden
+
+" Searching
+set hlsearch
+set incsearch
+set ignorecase
+set smartcase
+
+" Directories for swp files
+set nobackup
+set noswapfile
+
+set fileformats=unix,dos,mac
+
+" File overview
+set wildmode=list:longest,list:full
+set wildignore+=*.o,*.obj,.git,*.rbc,*.pyc,__pycache__
+
+" Shell to emulate
+if exists('$SHELL')
+    set shell=$SHELL
+else
+    set shell=/bin/bash
+endif
+
+" Set color scheme
+colorscheme molokai
+
+"Show always Status bar
+set laststatus=2
+
+" Use modeline overrides
+set modeline
+set modelines=10
+
+" Set terminal title
+set title
+set titleold="Terminal"
+set titlestring=%F
+
+" search will center on the line it's found in.
+nnoremap n nzzzv
+nnoremap N Nzzzv
+
+
+
+"*****************************************************************************
+"" Abbreviations
+"*****************************************************************************
+" no one is really happy until you have this shortcuts
+cnoreabbrev W! w!
+cnoreabbrev Q! q!
+cnoreabbrev Qall! qall!
+cnoreabbrev Wq wq
+cnoreabbrev Wa wa
+cnoreabbrev wQ wq
+cnoreabbrev WQ wq
+cnoreabbrev W w
+cnoreabbrev Q q
+cnoreabbrev Qall qall
+
+" NERDTree configuration
+let g:NERDTreeChDirMode=2
+let g:NERDTreeIgnore=['\.rbc$', '\~$', '\.pyc$', '\.db$', '\.sqlite$', '__pycache__']
+let g:NERDTreeSortOrder=['^__\.py$', '\/$', '*', '\.swp$', '\.bak$', '\~$']
+let g:NERDTreeShowBookmarks=1
+let g:nerdtree_tabs_focus_on_files=1
+let g:NERDTreeMapOpenInTabSilent = '<RightMouse>'
+let g:NERDTreeWinSize = 50
+set wildignore+=*/tmp/*,*.so,*.swp,*.zip,*.pyc,*.db,*.sqlite
+nnoremap <silent> <F1> :NERDTreeFind<CR>
+nnoremap <silent> <F2> :NERDTreeToggle<CR>
+
+" open terminal emulation
+nnoremap <silent> <leader>sh :terminal<CR>:startinsert<CR>
+
+"*****************************************************************************
+"" Autocmd Rules
+"*****************************************************************************
+"" The PC is fast enough, do syntax highlight syncing from start unless 200 lines
+augroup vimrc-sync-fromstart
+    autocmd!
+    autocmd BufEnter * :syntax sync maxlines=200
+augroup END
+
+" Nasm filetype
+augroup nasm
+    autocmd!
+    autocmd BufRead,BufNewFile *.nasm set ft=nasm
+augroup END
+
+" Binary filetype
+augroup Binary
+    au!
+    au BufReadPre  *.bin,*.exe,*.elf let &bin=1
+    au BufReadPost *.bin,*.exe,*.elf if &bin | %!xxd
+    au BufReadPost *.bin,*.exe,*.elf set ft=xxd | endif
+    au BufWritePre *.bin,*.exe,*.elf if &bin | %!xxd -r
+    au BufWritePre *.bin,*.exe,*.elf endif
+    au BufWritePost *.bin,*.exe,*.elf if &bin | %!xxd
+    au BufWritePost *.bin,*.exe,*.elf set nomod | endif
+augroup END
+
+" Binary filetype
+augroup fasm
+    au!
+    au BufReadPost *.fasm set ft=fasm
+augroup END
+
+augroup deoplete-update
+    autocmd!
+    autocmd VimEnter * UpdateRemotePlugin
+augroup END
+
+"" Remember cursor position
+augroup vimrc-remember-cursor-position
+    autocmd!
+    autocmd BufReadPost * if line("'\"") > 1 && line("'\"") <= line("$") | exe "normal! g`\"" | endif
+augroup END
+
+"" txt
+" augroup vimrc-wrapping
+"   autocmd!
+"   autocmd BufRead,BufNewFile *.txt call s:setupWrapping()
+" augroup END
+
+"" make/cmake
+augroup vimrc-make-cmake
+    autocmd!
+    autocmd FileType make setlocal noexpandtab
+    autocmd BufNewFile,BufRead CMakeLists.txt setlocal filetype=cmake
+augroup END
+
+set autoread
+
+"*****************************************************************************
+"" Mappings
+"*****************************************************************************
+
+" Split
+noremap <Leader>h :<C-u>split<CR>
+noremap <Leader>v :<C-u>vsplit<CR>
+
+" Git
+noremap <Leader>ga :Gwrite<CR>
+noremap <Leader>gc :Gcommit<CR>
+noremap <Leader>gsh :Gpush<CR>
+noremap <Leader>gll :Gpull<CR>
+noremap <Leader>gs :Gstatus<CR>
+noremap <Leader>gb :Gblame<CR>
+noremap <Leader>gd :Gvdiff<CR>
+noremap <Leader>gr :Gremove<CR>
+
+" Tabs
+nnoremap <Tab> gt
+nnoremap <S-Tab> gT
+nnoremap <silent> <S-t> :tabnew<CR>
+
+" Set working directory
+nnoremap <leader>. :lcd %:p:h<CR>
+
+" Opens an edit command with the path of the currently edited file filled in
+noremap <Leader>e :e <C-R>=expand("%:p:h") . "/" <CR>
+
+" Opens a tab edit command with the path of the currently edited file filled
+noremap <Leader>te :tabe <C-R>=expand("%:p:h") . "/" <CR>
+
+" Tagbar
+nmap <silent> <F3> :TagbarToggle<CR>
+let g:tagbar_autofocus = 1
+
+" Copy/Paste/Cut
+set clipboard^=unnamed,unnamedplus
+
+noremap YY "+y<CR>
+noremap <leader>p "+gP<CR>
+noremap XX "+x<CR>
+
+" Enable mouse for vim
+set mouse=a
+
+" Buffer nav
+noremap <leader>z :bp<CR>
+noremap <leader>q :bp<CR>
+noremap <leader>x :bn<CR>
+noremap <leader>w :bn<CR>
+
+" Close buffer
+noremap <leader>c :bd<CR>
+
+" Clean search (highlight)
+nnoremap <silent> <leader><space> :noh<cr>
+
+" Switching windows
+noremap <C-j> <C-w>j
+noremap <C-k> <C-w>k
+noremap <C-l> <C-w>l
+noremap <C-h> <C-w>h
+
+" Vmap for maintain Visual Mode after shifting > and <
+vmap < <gv
+vmap > >gv
+
+" Move visual block
+vnoremap J :m '>+1<CR>gv=gv
+vnoremap K :m '<-2<CR>gv=gv
+
+" Open current line on GitHub
+nnoremap <Leader>o :.Gbrowse<CR>
+
+
+" Save on strg+s if not in paste mode
+nmap <c-s> :w<CR>
+vmap <c-s> <Esc><c-s>gv
+imap <c-s> <Esc><c-s>
+
+" Quit on strg+q in normal mode
+nnoremap <c-q> :q<cr>
+
+" Strg+d to replace word under cursor
+nnoremap <c-d> :%s/\<<C-r><C-w>\>//g<Left><Left>
+
+" Strg+f ro find word under cursor
+nnoremap <c-f> :/<C-r><C-w><Left><Left>
+
+" Remove unneccessary spaces
+nnoremap <silent> <F5> :let _s=@/ <Bar> :%s/\s\+$//e <Bar> :let @/=_s <Bar> :nohl <Bar> :unlet _s <CR>
+
+" Reindent whole file with F6
+map <F6> mzgg=G`z
+
+" Toggle location list
+nmap <silent> <F4> :call ToggleList("Quickfix List", 'c')<CR>
+
+" Replacing text in visual mode doesn't copy it anymore
+xmap p <Plug>ReplaceWithRegisterVisual
+xmap <MiddleMouse> <Plug>ReplaceWithRegisterVisual
+
+" ALE mappings
+nmap <Leader>i <Plug>(ale_hover)
+nmap <Leader>d <Plug>(ale_go_to_definition_in_tab)
+nmap <Leader>rf <Plug>(ale_find_references)
+nmap <silent><F7> <Plug>(ale_fix)
+
+" Vim-Go mappings
+au FileType go nmap <Leader>i :GoDoc<cr>
+au FileType go nmap <Leader>d :GoDef<cr>
+au FileType go nmap <Leader>rf :GoReferrers<cr>
+
+
+"" Opens an edit command with the path of the currently edited file filled in
+noremap <Leader>e :e <C-R>=expand("%:p:h") . "/" <CR>
+
+" Use tab for navigatin in autocompletion window
+inoremap <expr> <Tab> pumvisible() ? "\<C-n>" : "\<Tab>"
+inoremap <expr> <S-Tab> pumvisible() ? "\<C-p>" : "\<S-Tab>"
+
+
+"*****************************************************************************
+"" Plugin settings
+"*****************************************************************************
+
+" vim-airline
+set statusline+=%{fugitive#statusline()}
+let g:airline_theme = 'powerlineish'
+let g:airline#extensions#syntastic#enabled = 1
+let g:airline#extensions#branch#enabled = 1
+let g:airline#extensions#tabline#enabled = 1
+let g:airline#extensions#tagbar#enabled = 1
+let g:airline_skip_empty_sections = 1
+let g:airline#extensions#ale#enabled = 1
+
+" show indent lines
+let g:indent_guides_enable_on_vim_startup = 1
+let g:indent_guides_auto_colors = 0
+hi IndentGuidesOdd ctermbg=235
+hi IndentGuidesEven ctermbg=235
+let g:indent_guides_guide_size = 1
+let g:indent_guides_start_level = 2
+
+" Enable autocompletion
+let g:deoplete#enable_at_startup = 1
+set completeopt-=preview
+
+" Ale no preview on hover
+let g:ale_close_preview_on_insert = 0
+let g:ale_cursor_detail = 0
+
+" Ale skip if file size over 2G
+let g:ale_maximum_file_size = "2147483648"
+
+" Ale to loclist and quickfix
+let g:ale_set_quickfix = 1
+" let g:ale_set_loclist = 1
+
+
+" Ale language server
+let g:ale_linters = {
+            \ 'python': ['pyls'],
+            \ 'c': ['cquery'],
+            \ 'cpp': ['cquery'],
+            \ 'xml': ['xmllint']
+            \ }
+
+
+" ALE fixers
+let g:ale_fixers = { '*': ['remove_trailing_lines', 'trim_whitespace'] }
+let g:ale_fixers.python = ['black']
+let g:ale_fixers.go = ['gofmt']
+let g:ale_fixers.c = ['clang-format']
+let g:ale_fixers.cpp = ['clang-format']
+let g:ale_fixers.json = ['jq']
+let g:ale_fixers.xml = ['xmllint']
+
+let g:ale_completion_enabled = 1
+let g:ale_sign_error = '⤫'
+let g:ale_sign_warning = '⚠'
+let g:ale_lint_on_insert_leave = 1
+
+" Vim-Go Settings
+let g:go_auto_sameids = 1
+let g:go_fmt_command = "goimports"
+let g:go_auto_type_info = 1
+
+" Disable syntastic for langserver supported languages
+let g:syntastic_mode_map = {
+            \ "mode": "active",
+            \ "passive_filetypes": ["go", "python", "c", "cpp", "xml" ]
+            \ }
+let g:syntastic_always_populate_loc_list = 1
+let g:syntastic_auto_loc_list = 2
+let g:syntastic_aggregate_errors = 1
+let g:syntastic_check_on_open = 1
+let g:syntastic_check_on_wq = 0
+let g:syntastic_error_symbol='✗'
+let g:syntastic_warning_symbol='⚠'
+let g:syntastic_style_error_symbol = '✗'
+let g:syntastic_style_warning_symbol = '⚠'
+
+"*****************************************************************************
+"" Shortcuts overview
+"*****************************************************************************
+" Shortcuts overview
+" F1  --> Filetree find
+" F2  --> Filetree toggle
+" F3  --> Function overview
+" F4  --> Toggle error bar
+
+" F5  --> Remove trailing whitespaces
+" F6  --> Reindent whole file
+" F7  --> Format and lint file
+" ,i  --> Information about function
+" ,d  --> Jump to definition
+" ,r  --> Rename in all occurences
+" ,rf --> Find references of function/variable
+" ,e  --> Change current file
+" ,te --> Open file in new tab
+" strg+f --> Find current selected word
+" strg+d --> Replace current selected word
+" strg+s --> Save file
+" strg+q --> Close current file
+" space+, --> Stop highlighting words after search
+
diff --git a/mb/2configs/nvim.nix b/mb/2configs/nvim.nix
new file mode 100644
index 000000000..a8e4173e2
--- /dev/null
+++ b/mb/2configs/nvim.nix
@@ -0,0 +1,70 @@
+{ pkgs, config, ... }: let
+  #unstable = import <nixos-unstable> { };
+in
+
+{
+  environment.variables = {
+    EDITOR = ["nvim"];
+  };
+
+  nixpkgs.config.packageOverrides = pkgs: with pkgs;{
+    neovim_custom = neovim.override {
+      configure = {
+        customRC = builtins.readFile ./neovimrc;
+
+        packages.myVimPackage = with pkgs.vimPlugins;
+        {
+          # loaded on launch
+          start = [
+            nerdtree # file manager
+            commentary # comment stuff out based on language
+            fugitive # full git integration
+            vim-airline-themes # lean & mean status/tabline
+            vim-airline # status bar
+            gitgutter # git diff in the gutter (sign column)
+            vim-trailing-whitespace # trailing whitspaces in red
+            tagbar # F3 function overview
+            syntastic # Fallback to singlethreaded but huge syntax support
+            ReplaceWithRegister # For better copying/replacing
+            polyglot # Language pack
+            vim-indent-guides # for displaying indent levels
+            ale # threaded language client
+            vim-go # go linting
+            deoplete-go # go autocompletion completion
+            deoplete-nvim # general autocompletion
+            molokai # color scheme
+          ];
+
+          # manually loadable by calling `:packadd $plugin-name`
+          opt = [];
+        };
+      };
+    };
+  };
+
+  environment.systemPackages = with pkgs; [
+    ctags
+    neovim_custom
+    jq # For fixing json files
+    xxd # .bin files will be displayed with xxd
+    shellcheck # Shell linting
+    ansible-lint # Ansible linting
+    unzip # To vim into unzipped files
+    nodePackages.jsonlint # json linting
+    #python36Packages.python-language-server # python linting
+    #python36Packages.pyls-mypy # Python static type checker
+    #python36Packages.black # Python code formatter
+    #python37Packages.yamllint # For linting yaml files
+    #python37Packages.libxml2 # For fixing yaml files
+    cquery # C/C++ support
+    clang-tools # C++ fixer
+  ];
+
+  fonts = {
+    fonts = with pkgs; [
+      font-awesome_5
+    ];
+  };
+
+}
+
diff --git a/mb/2configs/qemu-guest.nix b/mb/2configs/qemu-guest.nix
new file mode 100644
index 000000000..315d04093
--- /dev/null
+++ b/mb/2configs/qemu-guest.nix
@@ -0,0 +1,19 @@
+# Common configuration for virtual machines running under QEMU (using
+# virtio).
+
+{ ... }:
+
+{
+  boot.initrd.availableKernelModules = [ "virtio_net" "virtio_pci" "virtio_mmio" "virtio_blk" "virtio_scsi" "9p" "9pnet_virtio" ];
+  boot.initrd.kernelModules = [ "virtio_balloon" "virtio_console" "virtio_rng" ];
+
+  boot.initrd.postDeviceCommands =
+    ''
+      # Set the system time from the hardware clock to work around a
+      # bug in qemu-kvm > 1.5.2 (where the VM clock is initialised
+      # to the *boot time* of the host).
+      hwclock -s
+    '';
+
+  security.rngd.enable = false;
+}