Update run-sway-vm.sh

compositor/sway/dev/run-sway-vm.sh

@@ -21,6 +21,11 @@ script_dir=$(CDPATH= cd -- "$(dirname -- "$0")" && pwd)
 repo_root=$(CDPATH= cd -- "${script_dir}/../../.." && pwd)
 config="${repo_root}/compositor/sway/nebula-sway.conf"
 
+if command -v realpath >/dev/null 2>&1; then
+    repo_root=$(realpath "${repo_root}")
+    config=$(realpath "${config}")
+fi
+
 export XDG_CURRENT_DESKTOP="${XDG_CURRENT_DESKTOP:-NebulaOS}"
 export XDG_SESSION_DESKTOP="${XDG_SESSION_DESKTOP:-nebula}"
 export XCURSOR_THEME="${XCURSOR_THEME:-Adwaita}"
@@ -34,6 +39,24 @@ if [ ! -f "${config}" ]; then
     exit 1
 fi
 
+if grep -q '^[[:space:]]*title_format\>' "${config}"; then
+    echo "nebula: refusing to start; ${config} still contains title_format" >&2
+    echo "nebula: this Sway build does not support that command." >&2
+    exit 1
+fi
+
+echo "nebula: repo     ${repo_root}"
+echo "nebula: config   ${config}"
+echo "nebula: sway     $(command -v sway 2>/dev/null || echo missing)"
+
+if [ -n "${SWAYSOCK:-}" ]; then
+    echo "nebula: SWAYSOCK is set to ${SWAYSOCK}" >&2
+    echo "nebula: you are already inside a compositor session." >&2
+    echo "nebula: log out of that session or switch to a TTY (Ctrl+Alt+F3)," >&2
+    echo "nebula: then start Sway from ~/Nebula-OS so this config is used." >&2
+    exit 1
+fi
+
 cd "${repo_root}"
 echo "nebula: starting Sway with ${config}"
 exec sway -c "${config}" "$@"