Expand all the guard conditionals to be as readable as possible

install/preflight/guard.sh

@@ -5,25 +5,36 @@ abort() {
 }
 
 # Must be an Arch distro
-[[ -f /etc/arch-release ]] || abort "Vanilla Arch"
+if [[ ! -f /etc/arch-release ]]; then
+  abort "Vanilla Arch"
+fi
 
 # Must not be an Arch derivative distro
 for marker in /etc/cachyos-release /etc/eos-release /etc/garuda-release /etc/manjaro-release; do
-  [[ -f "$marker" ]] && abort "Vanilla Arch"
+  if [[ -f "$marker" ]]; then
+    abort "Vanilla Arch"
+  fi
 done
 
 # Must not be running as root
-[ "$EUID" -eq 0 ] && abort "Running as root (not user)"
+if [ "$EUID" -eq 0 ]; then
+  abort "Running as root (not user)"
+fi
 
 # Must be x86 only to fully work
-[ "$(uname -m)" != "x86_64" ] && abort "x86_64 CPU"
+if [ "$(uname -m)" != "x86_64" ]; then
+  abort "x86_64 CPU"
+fi
 
 # Must have secure boot disabled
-bootctl status 2>/dev/null | grep -q 'Secure Boot: enabled' && abort "Secure Boot disabled"
+if bootctl status 2>/dev/null | grep -q 'Secure Boot: enabled'; then
+  abort "Secure Boot disabled"
+fi
 
 # Must not have Gnome or KDE already install
-pacman -Qe gnome-shell &>/dev/null && abort "Fresh + Vanilla Arch"
+if pacman -Qe gnome-shell &>/dev/null || pacman -Qe plasma-desktop &>/dev/null; then
-pacman -Qe plasma-desktop &>/dev/null && abort "Fresh + Vanilla Arch"
+  abort "Fresh + Vanilla Arch"
+fi
 
 # Cleared all guards
 echo "Guards: OK"