Add dunst configuration via patch

Add a patch to alter the delivered configuration to my needs (e.g. color
scheme).

Also document configuration process in readme.

overlays/dunst/default.nix

@@ -1,6 +1,7 @@
 self: super: {
   dunst = super.dunst.overrideAttrs(oldAttrs: rec {
     patches = [
+      ./settings.patch
       ./systemd-service.patch
     ];
   });

overlays/dunst/settings.patch

@@ -0,0 +1,131 @@
+diff --git a/dunstrc b/dunstrc
+index c70de40..bc85e2b 100644
+--- a/dunstrc
++++ b/dunstrc
+@@ -24,16 +24,17 @@
+     # dynamic width from 0 to 300
+     # width = (0, 300)
+     # constant width of 300
+-    width = 300
++    # Use huuuuge number to auto use maximum available with
++    width = 1000000
+ 
+     # The maximum height of a single notification, excluding the frame.
+     height = 300
+ 
+     # Position the notification in the top right corner
+-    origin = top-right
++    origin = top-left
+ 
+     # Offset from the origin
+-    offset = 10x50
++    offset = 0x0
+ 
+     # Scale factor. It is auto-detected if value is 0.
+     scale = 0
+@@ -86,10 +87,10 @@
+ 
+     # Defines width in pixels of frame around the notification window.
+     # Set to 0 to disable.
+-    frame_width = 3
++    frame_width = 1
+ 
+     # Defines color of the frame around the notification window.
+-    frame_color = "#aaaaaa"
++    frame_color = "#72B3CC"
+ 
+     # Define a color for the separator.
+     # possible values are:
+@@ -107,11 +108,11 @@
+     # Set to 0 to disable.
+     # A client can set the 'transient' hint to bypass this. See the rules
+     # section for how to disable this if necessary
+-    # idle_threshold = 120
++    idle_threshold = 120
+ 
+     ### Text ###
+ 
+-    font = Monospace 8
++    font = Monospace 14
+ 
+     # The spacing between lines.  If the height is smaller than the
+     # font height, it will get raised to the font height.
+@@ -151,7 +152,7 @@
+     #   %n  progress value if set without any extra characters
+     #   %%  Literal %
+     # Markup is allowed
+-    format = "<b>%s</b>\n%b"
++    format = "<b>%s</b>\n%b\n(%a)"
+ 
+     # Alignment of message text.
+     # Possible values are "left", "center" and "right".
+@@ -196,7 +197,7 @@
+     max_icon_size = 32
+ 
+     # Paths to default icons.
+-    icon_path = /usr/share/icons/gnome/16x16/status/:/usr/share/icons/gnome/16x16/devices/
++    icon_path = /usr/share/icons/gnome/32x32/emblems/:/usr/share/icons/gnome/32x32/status/:/usr/share/icons/gnome/32x32/actions/:/usr/share/icons/gnome/32x32/emotes/:/usr/share/icons/gnome/32x32/apps/:/usr/share/icons/gnome/32x32/devices/
+ 
+     ### History ###
+ 
+@@ -292,24 +293,23 @@
+ [urgency_low]
+     # IMPORTANT: colors have to be defined in quotation marks.
+     # Otherwise the "#" and following would be interpreted as a comment.
+-    background = "#222222"
+-    foreground = "#888888"
++    background = "#000000"
++    foreground = "#72B3CC"
+     timeout = 10
+     # Icon for notifications with low urgency, uncomment to enable
+     #default_icon = /path/to/icon
+ 
+ [urgency_normal]
+-    background = "#285577"
+-    foreground = "#ffffff"
++    background = "#000000"
++    foreground = "#72B3CC"
+     timeout = 10
+     # Icon for notifications with normal urgency, uncomment to enable
+     #default_icon = /path/to/icon
+ 
+ [urgency_critical]
+-    background = "#900000"
+-    foreground = "#ffffff"
+-    frame_color = "#ff0000"
+-    timeout = 0
++    background = "#000000"
++    foreground = "#E09690"
++    timeout = 30
+     # Icon for notifications with critical urgency, uncomment to enable
+     #default_icon = /path/to/icon
+ 
+@@ -433,4 +433,28 @@
+ #    appname = "some_volume_notifiers"
+ #    set_stack_tag = "volume"
+ #
++
++[networkmanager]
++    appname = "NetworkManager"
++    urgency = low
++    new_icon = network-wireless
++    timeout = 2
++[james]
++    summary = "*James Greenwood*"
++    foreground = "#E09690"
++    urgency = critical
++    timeout = 30
++    format = "<b>%s</b>(%a)"
++[reuter-export]
++    summary = "TYPO3 Export"
++    foreground = "#8EB33B"
++    timeout = 30
++[switching]
++    summary = "switching*"
++    foreground = "#8EB33B"
++    timeout = 3
++[done]
++    summary = "*done*"
++    foreground = "#8EB33B"
++    timeout = 60
+ # vim: ft=cfg

readme.rst

@@ -23,15 +23,25 @@ The idea: Provide a configuration instead of some state.
 It can be installed via ``nix-env -i my-packages``
 which also "updates" state accordingly to the current defined set.
 
+Configurations
+--------------
+
+Some derivations will provide ready to use configuration.
+Those are most likely placed within ``~/.nix-profile/etc/*``.
+
+One can symlink them into ``~/.config/*``.
+
+E.g. ``~/.config/dunst -> ~/.nix-profile/etc/dunst``
+
 systemd units
 -------------
 
 Some derivations will provide ready to use systemd units.
-Those are most likely placed within ``~/.nix-profile/lib/systemd/*``.
+Those are most likely placed within ``~/.nix-profile/share/systemd/*``.
 
 One can symlink them into ``~/.config/systemd``.
 
-E.g. ``~/.config/systemd/user/dunst.service -> ~/.nix-profile/lib/systemd/user/dunst.service``
+E.g. ``~/.config/systemd/user/dunst.service -> ~/.nix-profile/share/systemd/user/dunst.service``
 
 Update
 ------