feat(dotfiles): Begin controlling various dotfiles from Nix

Moves my i3 configuration into a nix derivation called 'tazjins-dotfiles'.

A good step towards fully declarative system configuration!

5 files changed, 200 insertions, 2 deletions

diff --git a/configuration.nix b/configuration.nix
index a0d06e9554d5..aae8c61db41f 100644
--- a/configuration.nix
+++ b/configuration.nix
@@ -11,6 +11,7 @@
     ./local-configuration.nix
     ./packages.nix
     ./desktop.nix
+    ./dotfiles.nix
     ];
 
   # Use the systemd-boot EFI boot loader.
diff --git a/desktop.nix b/desktop.nix
index 541d1a458049..85e9f4b9a8c6 100644
--- a/desktop.nix
+++ b/desktop.nix
@@ -10,7 +10,11 @@ in {
   services.xserver.xkbOptions = "caps:super, grp:shifts_toggle";
 
   # configure desktop environment:
-  services.xserver.windowManager.i3.enable = true;
+  services.xserver.windowManager.i3 = {
+    enable = true;
+    configFile = "/etc/i3/config";
+  };
+
   services.compton.enable = true;
   services.compton.backend = "xrender"; # this should be the default!
 
diff --git a/dotfiles.nix b/dotfiles.nix
new file mode 100644
index 000000000000..8ba5f976f76e
--- /dev/null
+++ b/dotfiles.nix
@@ -0,0 +1,31 @@
+# Bundle configuration files into a derivation.
+# I call this derivation dotfiles despite that not technically being true
+# anymore ...
+
+{ config, pkgs, ...}:
+
+let dotfiles = pkgs.stdenv.mkDerivation {
+  name = "tazjins-dotfiles";
+
+  srcs = [
+    ./dotfiles
+  ];
+
+  installPhase = ''
+    mkdir -p $out/dotfiles
+    cp ./* $out/dotfiles/
+  '';
+};
+in {
+  # /etc/ is a special place in NixOS!
+  # Symlinks that need to be created there must be specified explicitly.
+  environment.etc = {
+    "i3/config" = {
+      source = "${dotfiles}/dotfiles/i3.conf";
+      # Setting a mode causes Nix to copy the file instead of symlinking it.
+      # For i3 config in particular this is desirable because I want to be able
+      # to modify and reload it before committing a change.
+      mode = "0644";
+    };
+  };
+}
diff --git a/dotfiles/i3.conf b/dotfiles/i3.conf
new file mode 100644
index 000000000000..d42ce2716cdf
--- /dev/null
+++ b/dotfiles/i3.conf
@@ -0,0 +1,163 @@
+# i3 config file (v4)
+#
+# Please see http://i3wm.org/docs/userguide.html for a complete reference!
+
+set $mod Mod4
+
+font pango:Input Mono 11
+
+# Use Mouse+$mod to drag floating windows to their wanted position
+floating_modifier $mod
+
+# start a terminal
+bindsym $mod+Return exec alacritty
+
+# start an emacs frame
+bindsym $mod+e exec emacsclient -c -n
+
+# kill focused window
+bindsym $mod+Shift+q kill
+
+# start rofi (a program launcher)
+bindsym XF86Search exec rofi -show run
+bindsym $mod+d exec rofi -show run
+
+bindsym $mod+p exec passmenu
+
+# change focus
+bindsym $mod+j focus left
+bindsym $mod+k focus down
+bindsym $mod+l focus up
+bindsym $mod+semicolon focus right
+
+# alternatively, you can use the cursor keys:
+bindsym $mod+Left focus left
+bindsym $mod+Down focus down
+bindsym $mod+Up focus up
+bindsym $mod+Right focus right
+
+# move focused window
+bindsym $mod+Shift+j move left
+bindsym $mod+Shift+k move down
+bindsym $mod+Shift+l move up
+bindsym $mod+Shift+semicolon move right
+
+# alternatively, you can use the cursor keys:
+bindsym $mod+Shift+Left move left
+bindsym $mod+Shift+Down move down
+bindsym $mod+Shift+Up move up
+bindsym $mod+Shift+Right move right
+
+# split in horizontal orientation
+bindsym $mod+h split h
+
+# split in vertical orientation
+bindsym $mod+v split v
+
+# enter fullscreen mode for the focused container
+bindsym $mod+f fullscreen toggle
+
+# change container layout (stacked, tabbed, toggle split)
+bindsym $mod+s layout stacking
+bindsym $mod+w layout tabbed
+bindsym $mod+x layout toggle split
+
+# toggle tiling / floating
+bindsym $mod+Shift+space floating toggle
+
+# change focus between tiling / floating windows
+bindsym $mod+space focus mode_toggle
+
+# focus the parent container
+bindsym $mod+a focus parent
+
+# focus the child container
+#bindsym $mod+d focus child
+
+# switch to workspace
+bindsym $mod+1 workspace 1
+bindsym $mod+2 workspace 2
+bindsym $mod+3 workspace 3
+bindsym $mod+4 workspace 4
+bindsym $mod+5 workspace 5
+bindsym $mod+6 workspace 6
+bindsym $mod+7 workspace 7
+bindsym $mod+8 workspace 8
+bindsym $mod+9 workspace 9
+bindsym $mod+0 workspace 10
+
+# move focused container to workspace
+bindsym $mod+Shift+1 move container to workspace 1
+bindsym $mod+Shift+2 move container to workspace 2
+bindsym $mod+Shift+3 move container to workspace 3
+bindsym $mod+Shift+4 move container to workspace 4
+bindsym $mod+Shift+5 move container to workspace 5
+bindsym $mod+Shift+6 move container to workspace 6
+bindsym $mod+Shift+7 move container to workspace 7
+bindsym $mod+Shift+8 move container to workspace 8
+bindsym $mod+Shift+9 move container to workspace 9
+bindsym $mod+Shift+0 move container to workspace 10
+
+# move workspace to next output
+bindsym $mod+Shift+m move workspace to output left
+
+# reload the configuration file
+bindsym $mod+Shift+c reload
+# restart i3 inplace (preserves your layout/session, can be used to upgrade i3)
+bindsym $mod+Shift+r restart
+# exit i3 (logs you out of your X session)
+bindsym $mod+Shift+e exec "i3-nagbar -t warning -m 'You pressed the exit shortcut. Do you really want to exit i3? This will end your X session.' -b 'Yes, exit i3' 'i3-msg exit'"
+
+# resize window (you can also use the mouse for that)
+mode "resize" {
+        # These bindings trigger as soon as you enter the resize mode
+
+        # Pressing left will shrink the window’s width.
+        # Pressing right will grow the window’s width.
+        # Pressing up will shrink the window’s height.
+        # Pressing down will grow the window’s height.
+        bindsym j resize shrink width 10 px or 10 ppt
+        bindsym k resize grow height 10 px or 10 ppt
+        bindsym l resize shrink height 10 px or 10 ppt
+        bindsym semicolon resize grow width 10 px or 10 ppt
+
+        # same bindings, but for the arrow keys
+        bindsym Left resize shrink width 10 px or 10 ppt
+        bindsym Down resize grow height 10 px or 10 ppt
+        bindsym Up resize shrink height 10 px or 10 ppt
+        bindsym Right resize grow width 10 px or 10 ppt
+
+        # back to normal: Enter or Escape
+        bindsym Return mode "default"
+        bindsym Escape mode "default"
+}
+
+bindsym $mod+r mode "resize"
+
+# Start i3bar to display a workspace bar (plus the system information i3status
+# finds out, if available)
+bar {
+    status_command i3status
+	position top
+}
+
+# Disable window title bars
+new_window 1pixel
+
+# Switch back and forth between workspaces automatically
+workspace_auto_back_and_forth yes
+
+# Brightness controls
+bindsym XF86MonBrightnessDown exec light -U 10
+bindsym XF86MonBrightnessUp exec light -A 10
+
+# Volume controls
+bindsym XF86AudioMute exec --no-startup-id "pulseaudio-ctl mute"
+bindsym XF86AudioRaiseVolume exec --no-startup-id "pulseaudio-ctl up"
+bindsym XF86AudioLowerVolume exec --no-startup-id "pulseaudio-ctl down"
+
+# Lock screen
+bindsym F7 exec i3lock
+
+# Enable floating for popup windows (e.g. pinentry)
+for_window [title="pinentry"] floating enable
diff --git a/stallo-configuration.nix b/stallo-configuration.nix
index 57f55d774d2a..2925152824e6 100644
--- a/stallo-configuration.nix
+++ b/stallo-configuration.nix
@@ -1,4 +1,3 @@
-
 # Local configuration for 'stallo' (Home desktop PC)
 { config, ...}: