feat(arch): create wrapper script for spotify

Spotify will not follow rules set by bspc, because WM_CLASS is not set
at the right time:

baskerville/bspwm#291 (comment)

As a workaround, navigate to the desired workspace before launching it.

base/arch/run_spotify.sh

@@ -0,0 +1,5 @@
+#!/bin/sh
+
+DESKTOP=${1:-7}
+bspc desktop --focus "^$DESKTOP"
+spotify

base/arch/topic.config.yml

@@ -8,6 +8,9 @@ arch_config:
     - src: focus_or_run.sh
       dest: "{{ xdg_bin_home }}/"
       rename: focus_or_run
+    - src: run_spotify.sh
+      dest: "{{ xdg_bin_home }}/"
+      rename: run_spotify
     - src: gpg.conf
       dest: ~/.gnupg/
     - autostart.sh

keyboard/sxhkd/sxhkdrc

@@ -16,7 +16,7 @@ hyper + shift + t
   focus_or_run alacritty
 
 hyper + u
-  focus_or_run spotify
+  focus_or_run run_spotify spotify
 
 hyper + s
   focus_or_run emacs

wm/bspwm/bspwmrc

@@ -28,6 +28,11 @@ bspc rule -a Emacs desktop='^4' state=fullscreen follow=on
 bspc rule -a Chromium desktop='^6'
 bspc rule -a TmuxAlacritty desktop='^5' follow=on
 
+# This won't work - see:
+# https://github.com/baskerville/bspwm/issues/291#issuecomment-145329416
+bspc rule -a spotify desktop='^7'
+# Check base/arch/run_spotify.sh for a workaround
+
 _run_if_present () {
   case $1 in
     "/"*) script="$1" ;;