crap ton of stuff

boxes/x230t/default.nix

@@ -7,12 +7,26 @@
     ../../modules/common.nix
     ../../modules/x11.nix
     ../../modules/tlp.nix
+    ../../modules/media.nix
+    ../../modules/anki.nix
+    ../../modules/power-control.nix
   ];
 
+  environment.systemPackages = with pkgs; [
+    xscreensaver
+  ];
+
+  services.getty.autologinUser = "usr";
+
+  boot.loader = {
+    grub.timeoutStyle = "hidden";
+    timeout = 0;
+    grub.enable = true;
+    grub.device = "/dev/sda";
+  };
+
   hardware.pulseaudio.enable = true;
 
-  boot.loader.grub.enable = true;
-  boot.loader.grub.device = "/dev/sda";
 
   networking.hostName = "x230t";
 

builds/flake.nix

@@ -16,7 +16,6 @@
         st = pkgs.callPackage ./st.nix { };
         rebuild = pkgs.callPackage ./rebuild.nix { };
         utils = pkgs.callPackage ./utils.nix { };
-        xbattmon = pkgs.callPackage ./xbattmon.nix { };
       };
     in
     withSystem (

builds/pash.nix

@@ -1,27 +0,0 @@
-{ stdenv
-, lib
-, bash
-, gnupg
-, makeWrapper
-, fetchgit
-}:
-
-stdenv.mkDerivation rec {
-  pname = "pash";
-  version = "1.00";
-
-  src = fetchgit {
-    url = "https://git.beepboop.systems/rndusr/pash";
-    sha256 = "sha256-0L3N7F4BwVdu4rR5xpUEIHcX/x64Gni8JTUki5kGH24=";
-  };
-
-  nativeBuildInputs = [ makeWrapper gnupg ];
-
-  installPhase = ''
-    mkdir -p $out/bin
-    cp $src/pash $out/bin/pash
-    wrapProgram $out/bin/pash --prefix PATH : ${lib.makeBinPath [ bash ]}
-  '';
-
-  phases = [ "installPhase" ];
-}

builds/rebuild/rebuild

@@ -1,2 +1,6 @@
 cd ~/dot_testing
+if [ -f "flake.nix" ]; then
+	sudo nixos-rebuild --flake . switch $@
+else
 	sudo nixos-rebuild -I nixos-config=./boxes/$(hostname).nix switch $@
+fi

builds/st.nix

@@ -12,7 +12,7 @@
 
 stdenv.mkDerivation rec {
   pname = "st";
-  version = "69.19";
+  version = "1.02";
 
   src = fetchgit {
     url = "https://git.beepboop.systems/rndusr/st";

builds/utils.nix

@@ -1,5 +1,10 @@
 { stdenv
 , lib
+# for statusbar
+, pkg-config
+, libxcb
+# shell scripts stuff
+, makeWrapper
 , sxhkd
 , bash
 , feh
@@ -7,20 +12,23 @@
 , fzy
 , figlet
 , curl
+, ytfzf
 , xrandr
-, makeWrapper
 }:
 
 stdenv.mkDerivation rec {
   pname = "utils";
-  version = "1.00";
+  version = "1.01";
 
   src = ./utils;
 
-  nativeBuildInputs = [ makeWrapper ];
+  nativeBuildInputs = [ makeWrapper pkg-config libxcb ];
-  buildInputs = [ bash feh xrandr jq curl fzy ];
+  buildInputs = [ libxcb bash feh xrandr jq curl fzy ytfzf ];
 
-  buildPhase = "";
+  buildPhase = ''
+    ls
+    make
+  '';
 
   installPhase = ''
     mkdir -p $out/bin
@@ -28,10 +36,9 @@ stdenv.mkDerivation rec {
     for i in $(ls $src/sh); do
       cp $src/sh/$i $out/bin
       ln -sf $out/bin/tmenu_run $out/bin/regenerate
-      wrapProgram $out/bin/$i --prefix PATH : ${lib.makeBinPath [ sxhkd bash feh xrandr jq figlet curl fzy ]}
+      wrapProgram $out/bin/$i --prefix PATH : ${lib.makeBinPath [ sxhkd bash feh xrandr jq figlet curl fzy ytfzf ]}
     done
+
+    cp c/status/main $out/bin/statusbar
   '';
-
-  phases = [ "buildPhase" "installPhase" ];
 }
-

builds/utils/Makefile

@@ -0,0 +1,3 @@
+.PHONY: main
+main:
+	make -C c/status -f Makefile

builds/utils/c/status/.gitignore

@@ -0,0 +1,2 @@
+main
+*.o

builds/utils/c/status/Makefile

@@ -0,0 +1,9 @@
+LDFLAGS=`pkg-config --cflags --libs xcb`
+CFLAGS=-ggdb -fsanitize=address
+main: battery.o bspwm.o time.o battstatus.o
+
+clean:
+	rm *.o main
+
+run:
+	./main

builds/utils/c/status/README

@@ -0,0 +1,4 @@
+status
+------
+
+a simple statusbar script thing (tm)

builds/utils/c/status/battery.c

@@ -0,0 +1,38 @@
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <string.h>
+#include <fcntl.h>
+
+#include "battery.h"
+#include "common.h"
+
+/* config contains a path to the battery */
+int mod_battery(char *config, char *name, char *pipename) {
+	struct message msg;
+	strcpy(msg.name, name);
+
+	int fd = open(pipename, O_WRONLY);
+	int battery;
+	int recvd;
+
+	chdir("/sys/class/power_supply");
+	chdir(config);
+
+	for(;;) {
+		battery = open("capacity", O_RDONLY);
+		recvd = read(battery, msg.content, 3);
+		msg.content[3] = '\0';
+		if (msg.content[2] == '\n') {
+			msg.content[2] = '\0';
+		}
+		close(battery);
+		write(fd, &msg, sizeof(msg));
+
+		sleep(30);
+	}
+
+	return 0;
+}

builds/utils/c/status/battery.h

@@ -0,0 +1,6 @@
+#ifndef STATUS_BATTERY_H
+#define STATUS_BATTERY_H
+
+int mod_battery(char *config, char *name, char *pipename);
+
+#endif

builds/utils/c/status/battstatus.c

@@ -0,0 +1,48 @@
+#include <unistd.h>
+#include <stdio.h>
+#include <string.h>
+#include <fcntl.h>
+
+#include "battstatus.h"
+#include "common.h"
+
+int mod_battstatus(char *config, char *name, char *pipename) {
+	char status;
+	int battery;
+	struct message msg;
+	strcpy(msg.name, name);
+
+	int fd = open(pipename, O_WRONLY);
+
+	chdir("/sys/class/power_supply");
+	chdir(config);
+
+	for(;;) {
+		battery = open("status", O_RDONLY);
+		read(battery, msg.content, 1);
+		switch(msg.content[0]) {
+			case 'N': /* not charging */
+				msg.content[0] = '-';
+				break;
+			case 'C': /* charging */
+				msg.content[0] = '^';
+				break;
+			case 'D': /* discharging */
+				msg.content[0] = 'U';
+				break;
+			case 'U': /* unknown */
+				msg.content[0] = '?';
+				break;
+			default: /* what's going on? */
+				msg.content[0] = '!';
+				break;
+		}
+		msg.content[1] = '\0';
+		close(battery);
+		write(fd, &msg, sizeof(msg));
+
+		sleep(30);
+	}
+
+	return 0;
+}

builds/utils/c/status/battstatus.h

@@ -0,0 +1,6 @@
+#ifndef STATUS_BATTSTAT_H
+#define STATUS_BATTSTAT_H
+
+int mod_battstatus(char *config, char *name, char *pipename);
+
+#endif

builds/utils/c/status/bspwm.c

@@ -0,0 +1,142 @@
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <xcb/xcb.h>
+#include <fcntl.h>
+
+#include "bspwm.h"
+#include "common.h"
+
+const char subscribe[] = "subscribe";
+
+int get_socket(void) {
+	struct sockaddr_un sock;
+	char *host;
+	int displaynumber, screennumber;
+	int fd;
+
+	xcb_parse_display(NULL, &host, &displaynumber, &screennumber);
+
+	sock.sun_family = AF_UNIX;
+	snprintf(
+		sock.sun_path,
+		sizeof(sock.sun_path), "/tmp/bspwm%s_%i_%i-socket",
+		host, displaynumber, screennumber
+	);
+
+	free(host);
+
+	fd = socket(AF_UNIX, SOCK_STREAM, 0);
+	if (connect(
+		fd,
+		(struct sockaddr *) &sock,
+		sizeof(sock)
+	) == -1) {
+		return -1;
+	} else {
+		return fd;
+	}
+}
+
+int should_be_shown(char c) {
+	return c == 'O' || c == 'o' || c == 'F' || c == 'U' || c == 'u';
+}
+
+int is_a_desktop(char c) {
+	return c == 'O' || c == 'o' || c == 'F' || c == 'f' || c == 'U' || c == 'u';
+}
+
+/* XXX: this function has the potential to buffer overflow by ONE BYTE.
+ * probably fix this? */
+void print_desktop_status(char *in, char *out, int outlen) {
+	int written;
+	int i;
+	char c;
+
+	/* flags */
+	int read_colon;
+	int skip_to_next_colon;
+	int read_until_colon;
+	int is_first_desktop;
+	int last_was_desktop;
+
+	i = 0;
+	written = 0;
+	read_colon = 1;
+	skip_to_next_colon = 0;
+	read_until_colon = 0;
+	is_first_desktop = 1;
+	last_was_desktop = 0;
+
+	for(;;) {
+		c = in[i];
+
+		if(!c) break;
+		if(written == outlen) break;
+
+		if (skip_to_next_colon) {
+			if (c == ':') {
+				skip_to_next_colon = 0;
+				read_until_colon = 0;
+				read_colon = 1;
+			} else if (read_until_colon) {
+				out[written] = c;
+				written++;
+			}
+		} else if (read_colon && should_be_shown(c)) {
+			if (!is_first_desktop) {
+				out[written] = ' ';
+				written++;
+			}
+
+			switch(c) {
+				case 'O':
+				case 'F': /* fallthrough */
+					out[written] = '*';
+					written++;
+					break;
+			}
+
+			skip_to_next_colon = 1;
+			read_until_colon = 1;
+			read_colon = 0;
+			is_first_desktop = 0;
+			last_was_desktop = 1;
+		} else if (read_colon && is_a_desktop(c)) {
+			last_was_desktop = 1;
+		} else {
+			if(last_was_desktop) {
+				break;
+			}
+		}
+		i++;
+	}
+
+	out[written] = '\0';
+}
+
+int mod_bspwm(char *config, char *name, char *pipename) {
+	struct message msg;
+	int fd, bspcfd;
+	char in[BUFFER_SIZE];
+
+	strcpy(msg.name, name);
+	msg.flags = 0;
+
+	fd = open(pipename, O_WRONLY);
+	bspcfd = get_socket();
+
+	send(bspcfd, subscribe, sizeof(subscribe), 0);
+
+	for(;;) {
+		int recvd = recv(bspcfd, in, BUFFER_SIZE, 0);
+		print_desktop_status(in, msg.content, 512);
+		write(fd, &msg, sizeof(msg));
+		memset(msg.content, 0, 512);
+	}
+
+	return 0;
+}

builds/utils/c/status/bspwm.h

@@ -0,0 +1,6 @@
+#ifndef STATUS_BSPWM_H
+#define STATUS_BSPWM_H
+
+int mod_bspwm(char *config, char *name, char *pipename);
+
+#endif

builds/utils/c/status/common.h

@@ -0,0 +1,21 @@
+#ifndef STATUS_COMMON_H
+#define STATUS_COMMON_H
+
+#define LENGTH(x)	sizeof(x) / sizeof(x[0])
+#define BUFFER_SIZE 512
+
+struct module {
+	int (*fork_callback)(char *config, char *name, char *pipename);
+	char name[16];
+	char config[512];
+	char buffer[512];
+	int buflen;
+};
+
+struct message {
+	int flags;
+	char name[16];
+	char content[512];
+};
+
+#endif

builds/utils/c/status/main.c

@@ -0,0 +1,91 @@
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/un.h>
+#include <time.h>
+#include <fcntl.h>
+
+#include <xcb/xcb.h>
+
+#include <string.h>
+
+#include "common.h"
+#include "battery.h"
+#include "battstatus.h"
+#include "bspwm.h"
+#include "time.h"
+
+struct module mods[] = {
+	{mod_battery, "battery", "BAT0", { '\0' }},
+	{mod_battstatus, "battstatus", "BAT0", { '\0' }},
+	{mod_time, "time", "", { '\0' }},
+/*	{mod_bspwm, "bspwm", "", { '\0' }}, not working at the moment */
+};
+
+void create_module_proc(int index, char *pipename) {
+	pid_t pid = fork();
+
+	if (pid == 0) { /* we're the child */
+		mods[index].fork_callback(
+			mods[index].config,
+			mods[index].name,
+			pipename
+		);
+	}
+}
+
+void create_module_procs(char *pipename) {
+	for(int i = 0; i < LENGTH(mods); i++) {
+		create_module_proc(i, pipename);
+	}
+}
+
+void redraw() {
+	/* get the progress' module's value, convert it to int, and then
+	 * figure out how much of the screen should be shaded in */
+
+	printf("\033[H\033[2J");
+	for(int i = 0; i < LENGTH(mods); i++) {
+		if (i == 0) printf("%s ", mods[i].buffer);
+		else printf("| %s ", mods[i].buffer);
+	}
+
+	fflush(stdout);
+}
+
+static char NAMED_PIPE[] = "/home/usr/.cache/statusbar_pipe";
+
+int main(void) {
+	char pipename[BUFFER_SIZE];
+	srand(time(NULL));
+	strcpy(pipename, &NAMED_PIPE);
+	pipename[sizeof(NAMED_PIPE) - 1] = 'A' + (rand() % 26);
+	pipename[sizeof(NAMED_PIPE)] = 'A' + (rand() % 26);
+	pipename[sizeof(NAMED_PIPE) + 1] = '\0';
+	mkfifo(pipename, 0666);
+	int fd = open(pipename, O_RDWR);
+	struct message msg;
+
+	create_module_procs(pipename);
+
+	for (;;) {
+		int ret = read(fd, &msg, sizeof(msg));
+		if(ret < 0) {
+			printf("error while reading message from child\n");
+		}
+
+		for(int i = 0; i < LENGTH(mods); i++) {
+			if(strcmp(mods[i].name, msg.name) == 0) {
+				mods[i].buflen = strlen(msg.content);
+				strcpy(mods[i].buffer, msg.content);
+				redraw();
+				break;
+			}
+		}
+	}
+
+	return 0;
+}

builds/utils/c/status/shell.nix

@@ -0,0 +1,9 @@
+with import <nixpkgs> {};
+ pkgs.mkShell {
+   nativeBuildInputs = [
+    gdb
+    gnumake
+    pkg-config
+    xorg.libxcb
+   ];
+ }

builds/utils/c/status/time.c

@@ -0,0 +1,27 @@
+#include <unistd.h>
+#include <fcntl.h>
+#include <time.h>
+#include <string.h>
+
+#include "common.h"
+#include "time.h"
+
+int mod_time(char *config, char *name, char *pipename) {
+	struct message msg;
+	time_t now;
+	struct tm *tm;
+	int fd;
+
+	strcpy(msg.name, name);
+	msg.flags = 0;
+	fd = open(pipename, O_WRONLY);
+
+	for(;;) {
+		time(&now);
+		tm = localtime(&now);
+		strftime(msg.content, 512, "%H:%M", tm);
+		write(fd, &msg, sizeof(msg));
+
+		sleep(60);
+	}
+}

builds/utils/c/status/time.h

@@ -0,0 +1,6 @@
+#ifndef STATUS_TIME_H
+#define STATUS_TIME_H
+
+int mod_time(char *config, char *name, char *pipename);
+
+#endif

builds/utils/sh/mode

@@ -1,4 +1,13 @@
 # mode - change the current effective sxhkd configuration
 
+if [ -n "$1" ]; then
 	pkill sxhkd
 	sxhkd -c ~/.config/sxhkd/$1 & disown
+	[ -f "~/.config/sxhkd/$1.sh ] && ~/.config/sxhkd/$1.sh
+
+	exit
+fi
+
+# we need a menu
+choice=$(ls ~/.config/sxhkd | tmenu)
+$0 $choice

builds/utils/sh/statuswrap

@@ -0,0 +1,12 @@
+#!/bin/sh
+
+geos=$(
+	xrandr | \
+	grep ' connected' | \
+	grep -o '[0-9]*x[0-9]*+[0-9]*+[0-9]*' | \
+	awk -F'[x+]' '{print $1 "x20+" $3 "+" $4}'
+)
+
+for i in $geos; do
+	st -c statusbar -p -g "$i" -e statusbar & disown
+done

builds/utils/sh/testing

@@ -0,0 +1,4 @@
+#!/bin/sh
+
+st &
+statusbar

builds/xbattmon.nix

@@ -1,41 +0,0 @@
-{ stdenv
-, lib
-, fetchgit
-, pkg-config
-, libX11
-, libXft
-, libXinerama
-, fontconfig
-, freetype
-, ncurses
-, extraLibs ? [ ]
-}:
-
-stdenv.mkDerivation rec {
-  pname = "xbattmon";
-  version = "69.19";
-
-  src = fetchgit {
-    url = "https://git.beepboop.systems/rndusr/xbattmon";
-    sha256 = "sha256-mM5pjyBw+1lJoaXt0BNiXmqGRt0U2ABENitA8K/EZ9E=";
-  };
-
-  nativeBuildInputs = [ pkg-config fontconfig freetype ncurses ];
-  buildInputs = [ libX11 libXft libXinerama ] ++ extraLibs;
-
-  buildPhase = ''
-    ./configure
-    make
-  '';
-
-  installPhase = ''
-    mkdir -p $out/bin
-    cp ${pname} $out/bin
-  '';
-
-  meta = with lib; {
-    description = "Customized builds of the st terminal emulator";
-    homepage = "https://git.beepboop.systems/rndusr/st";
-    license = licenses.mit;
-  };
-}

flake.lock

@@ -91,12 +91,12 @@
       },
       "locked": {
         "lastModified": 1,
-        "narHash": "sha256-B6H6Z595aKacBDVAbEc8gXeEr2YLZNm6JK43XPSKo10=",
+        "narHash": "sha256-YmGlTX2Y5d6aQzqZ1IzVp1CnbyXuHE1Fwwtf9nB40zE=",
-        "path": "/nix/store/q8dkdvbif26q9vnvh19prj5qdlk8qrny-source/builds",
+        "path": "/nix/store/arzg5zcsb349c5rz3kaflqiszdvfbqny-source/builds",
         "type": "path"
       },
       "original": {
-        "path": "/nix/store/q8dkdvbif26q9vnvh19prj5qdlk8qrny-source/builds",
+        "path": "/nix/store/arzg5zcsb349c5rz3kaflqiszdvfbqny-source/builds",
         "type": "path"
       }
     }

home/bash/profile

@@ -54,3 +54,6 @@ export DBUS_SESSION_BUS_ADDRESS="unix:path=$XDG_RUNTIME_DIR/bus"
 # source the bashrc(s)
 [ -f $HOME/.config/bash/bashrc ] && . $HOME/.config/bash/bashrc
 [ -f $HOME/.bashrc ] && . $HOME/.bashrc
+
+# if we're interactive and the tty is /dev/tty1 then start xorg
+[ "$(tty)" = "/dev/tty1" ] && sx

home/bspwm/bspwmrc

@@ -1,11 +1,21 @@
 #!/bin/sh
 # rndusr's bspwmrc
 
+bspc monitor -d 1 2 3 4 5 6 7 8 9
+
+bspc rule -a st-gpg-menu state=floating
+bspc rule -a statusbar border=off sticky=on state=floating manage=off
+bspc rule -a tmenu-prompt border=on sticky=on state=floating
+bspc rule -a Xmessage border=on state=floating
+bspc rule -a Zathura state=tiled
+bspc rule -a generic-st-window state=floating manage=on sticky=on border=on
+bspc rule -a floating-feh state=floating
+
 # post-wm boilerplate
+statuswrap
 wallpaper
 disp
-polybar &
+HOME=".config/xscreensaver" xscreensaver --no-splash &
-dunst &
 
 # set up the color scheme
 bspc config normal_border_color "#161510"
@@ -16,13 +26,5 @@ bspc config pointer_follows_focus true
 bspc config pointer_follows_monitor true
 bspc config focus_follows_pointer true
 
-bspc config window_gap 3
+bspc config window_gap 0
-#bspc config top_padding 20
+bspc config top_padding 20
-
-bspc rule -a st-gpg-menu state=floating
-bspc rule -a statusbar border=off sticky=on state=floating manage=off
-bspc rule -a tmenu-prompt border=on sticky=on state=floating
-bspc rule -a Xmessage border=on state=floating
-bspc rule -a Zathura state=tiled
-bspc rule -a generic-st-window state=floating manage=on sticky=on border=on
-bspc rule -a floating-feh state=floating

home/chromium/default.nix

@@ -8,5 +8,8 @@
   programs.chromium = {
     enable = true;
     package = pkgs.ungoogled-chromium;
+    extensions = [
+      { id = "ecnphlgnajanjnkcmbpancdjoidceilk"; }
+    ];
   };
 }

home/nvim/init.lua

@@ -80,20 +80,6 @@ globals.vimtex_view_method = 'zathura'
 -- }}}
 
 -- autocommands {{{
--- autocmds for sxhkd and bspwm config files
-vim.api.nvim_create_autocmd({"BufWrite"}, {
-	pattern = {"bspwmrc"},
-	callback = function()
-		vim.fn.system("bspc wm -r")
-	end
-})
-vim.api.nvim_create_autocmd({"BufWrite"}, {
-	pattern = {"sxhkdrc"},
-	callback = function()
-		vim.fn.system("killall sxhkd -USR1")
-	end
-})
-
 function setTabbing(lang, width)
 	vim.api.nvim_create_autocmd({"Filetype"}, {
 		pattern = {lang},
@@ -153,19 +139,8 @@ local packer = require('packer').startup(function(use)
 	use 'hrsh7th/nvim-cmp'
 	use 'hrsh7th/cmp-nvim-lsp'
 	use 'L3MON4D3/LuaSnip'
-	use 'https://github.com/vimwiki/vimwiki.git'
 	use 'lervag/vimtex'
 	use 'https://github.com/protex/better-digraphs.nvim'
-	use 'https://github.com/itchyny/calendar.vim'
-	use {
-		"folke/which-key.nvim",
-		config = function()
-			vim.o.timeout = true
-			vim.o.timeoutlen = 300
---			require("which-key").setup {
---			}
-		end
-	}
 
 	if packer_bootstrap then
 		require('packer').sync()

home/sxhkd/default.nix

@@ -7,5 +7,8 @@
     ".config/sxhkd/sxhkdrc" = {
       source = ./sxhkdrc;
     };
+    ".config/sxhkd/mouse" = {
+      source = ./mouse;
+    };
   };
 }

modules/anki.nix

@@ -0,0 +1,7 @@
+{ lib, config, pkgs, ...}:
+
+{
+  environment.systemPackages = with pkgs; [
+    anki-bin
+  ];
+}

modules/common.nix

@@ -10,7 +10,6 @@
     inputs.utilpkg.packages.x86_64-linux.st
     inputs.utilpkg.packages.x86_64-linux.rebuild
     inputs.utilpkg.packages.x86_64-linux.utils
-    inputs.utilpkg.packages.x86_64-linux.xbattmon
     pkgs.man-pages
   ];
 
@@ -26,7 +25,7 @@
 
   users.users.usr = {
     isNormalUser = true;
-    extraGroups = [ "wheel" ];
+    extraGroups = [ "wheel" "networkmanager" ];
     initialPassword = "usr";
   };
 }

modules/media.nix

@@ -0,0 +1,10 @@
+{ lib, config, pkgs, ...}:
+
+{
+  environment.systemPackages = with pkgs; [
+    musescore
+    audacity
+    libsForQt5.kdenlive
+    anki-bin
+  ];
+}

modules/power-control.nix

@@ -0,0 +1,25 @@
+{ lib, config, pkgs, inputs, ...}:
+
+{
+  # let regular users control power
+  security.sudo = {
+    enable = true;
+    extraRules = [{
+      commands = [
+        {
+          command = "${pkgs.systemd}/bin/systemctl suspend";
+          options = [ "NOPASSWD" ];
+        }
+        {
+          command = "${pkgs.systemd}/bin/reboot";
+          options = [ "NOPASSWD" ];
+        }
+        {
+          command = "${pkgs.systemd}/bin/poweroff";
+          options = [ "NOPASSWD" ];
+        }
+      ];
+      groups = [ "wheel" ];
+    }];
+  };
+}

modules/sxiv.nix

@@ -0,0 +1,7 @@
+{ lib, config, pkgs, ...}:
+
+{
+  environment.systemPackages = with pkgs; [
+    sxiv
+  ];
+}

modules/x11.nix

@@ -6,11 +6,13 @@
     ./gnupg.nix
     ./fonts.nix
     ./pulse.nix
+    ./sxiv.nix
   ];
 
-  environment.systemPackages = [
+  environment.systemPackages = with pkgs; [
-    pkgs.bspwm
+    bspwm
-    pkgs.sxhkd
+    sxhkd
+    xscreensaver
   ];
 
   services.xserver = {