meta: Move home-manager dwm config to separate module

Note that it's possible to use an autostart patch like
https://dwm.suckless.org/patches/cool_autostart/ so startx isn't
needed although this results in dwm starting before things like
the status bar get set.

home/dwm.nix

@@ -0,0 +1,84 @@
+{ config, pkgs, ... }:
+
+let
+  barScript = "dwm/bar.fish";
+in
+{
+  home = {
+    packages = with pkgs; [
+      feh
+      xclip
+      scrot
+    ];
+
+    file.".xinitrc" = {
+      executable = true;
+      text = # bash
+        ''
+          #!/usr/bin/env sh
+
+          export XDG_SESSION_TYPE=x11
+          export GDK_BACKEND=x11
+          export XDG_CURRENT_DESKTOP=dwm
+          export GTK_IM_MODULE=fcitx
+          export QT_IM_MODULE=fcitx
+          export XMODIFIERS=@im=fcitx
+          export SDL_IM_MODULE=fcitx
+          export GLFW_IM_MODULE=ibus
+          export GTK_CSD=0
+
+          xrdb -merge ~/.Xresources
+          xset r rate 300 50
+          feh --no-fehbg --bg-scale ${config.stylix.image}
+          ~/.config/${barScript} &
+          picom --daemon
+          ${pkgs.nemo}/bin/nemo-desktop &
+          fcitx5 &
+
+          while true; do
+            dbus-launch --sh-syntax --exit-with-session dwm
+          done
+        '';
+    };
+  };
+
+  xdg.configFile = {
+    ${barScript} = {
+      executable = true;
+      text = # fish
+        ''
+          #!/usr/bin/env fish
+
+          function get_icon
+            if test "$argv" -gt 90
+              echo " "
+            else if test "$argv" -gt 60
+              echo " "
+            else if test "$argv" -gt 30
+              echo " "
+            else if test "$argv" -gt 10
+              echo " "
+            else
+              echo " "
+            end
+          end
+
+          function update_bar
+            set VOLUME "音量：$(math "$(wpctl get-volume @DEFAULT_AUDIO_SINK@ | choose 1) * 100")%"
+            set TIME "$(date '+%x（%a）%R')"
+            set capacity "$(cat /sys/class/power_supply/BAT0/capacity)"
+
+            set BATTERY "$(get_icon $capacity)$capacity%"
+
+            xsetroot -name " $VOLUME・$BATTERY・$TIME "
+          end
+
+          while true
+            update_bar
+
+            sleep 10s
+          end
+        '';
+    };
+  };
+}

specializations/dwm.nix

@@ -6,98 +6,14 @@
 }:
 
 let
-  inherit (lib) singleton;
-
   inherit (config.lib.stylix.colors.withHashtag)
     base00
     base02
     base03
     base05
     ;
-
-  barScript = "dwm/bar.fish";
 in
 {
-  home-manager.sharedModules = singleton {
-    home = {
-      packages = with pkgs; [
-        feh
-        xclip
-        scrot
-      ];
-
-      file.".xinitrc" = {
-        executable = true;
-        text = # bash
-          ''
-            #!/usr/bin/env sh
-
-            export XDG_SESSION_TYPE=x11
-            export GDK_BACKEND=x11
-            export XDG_CURRENT_DESKTOP=dwm
-            export GTK_IM_MODULE=fcitx
-            export QT_IM_MODULE=fcitx
-            export XMODIFIERS=@im=fcitx
-            export SDL_IM_MODULE=fcitx
-            export GLFW_IM_MODULE=ibus
-            export GTK_CSD=0
-
-            xrdb -merge ~/.Xresources
-            xset r rate 300 50
-            feh --no-fehbg --bg-scale ${config.stylix.image}
-            ~/.config/${barScript} &
-            picom --daemon
-            ${pkgs.nemo}/bin/nemo-desktop &
-            fcitx5 &
-
-            while true; do
-              dbus-launch --sh-syntax --exit-with-session dwm
-            done
-          '';
-      };
-    };
-
-    xdg.configFile = {
-      ${barScript} = {
-        executable = true;
-        text = # fish
-          ''
-            #!/usr/bin/env fish
-
-            function get_icon
-              if test "$argv" -gt 90
-                echo " "
-              else if test "$argv" -gt 60
-                echo " "
-              else if test "$argv" -gt 30
-                echo " "
-              else if test "$argv" -gt 10
-                echo " "
-              else
-                echo " "
-              end
-            end
-
-            function update_bar
-              set VOLUME "音量：$(math "$(wpctl get-volume @DEFAULT_AUDIO_SINK@ | choose 1) * 100")%"
-              set TIME "$(date '+%x（%a）%R')"
-              set capacity "$(cat /sys/class/power_supply/BAT0/capacity)"
-
-              set BATTERY "$(get_icon $capacity)$capacity%"
-
-              xsetroot -name " $VOLUME・$BATTERY・$TIME "
-            end
-
-            while true
-              update_bar
-
-              sleep 10s
-            end
-          '';
-      };
-    };
-  };
-
   services = {
     xserver = {
       displayManager.startx.enable = true;