Switch server scripts to tmux for panel console access

Rewrite start-azeroth-servers.sh to launch auth/worldserver in named
tmux sessions instead of nohup/disown. Add kill-azeroth-servers.sh to
tear down sessions and stray processes. Update vps-update-server.sh
with a --restart flag that stops servers before compile and restarts
them in tmux after.

Co-authored-by: Cursor <cursoragent@cursor.com>

scripts/vps-update-server.sh

@@ -6,24 +6,25 @@
 # (see docs/DEPLOY_LINUX_VPS.md).
 #
 # What this does:
-#   1. git pull on the current branch (optional; can skip)
-#   2. ./acore.sh compiler build  — or  compiler all  for a full clean rebuild
+#   1. Optionally kill running servers (tmux sessions)
+#   2. git pull on the current branch (optional; can skip)
+#   3. ./acore.sh compiler build  — or  compiler all  for a full clean rebuild
+#   4. Optionally restart servers in tmux sessions
 #
 # Database migrations from data/sql/updates/ run when you next start worldserver/authserver
-# (Updates.* / SourceDirectory in *.conf). This script does not start or stop daemons unless
-# you pass --run-after or set FRACTURED_POST_UPDATE_CMD.
+# (Updates.* / SourceDirectory in *.conf).
 #
 # Usage:
-#   bash scripts/vps-update-server.sh
-#   bash scripts/vps-update-server.sh --full
-#   bash scripts/vps-update-server.sh --no-pull
+#   bash scripts/vps-update-server.sh                      # pull + compile only
+#   bash scripts/vps-update-server.sh --restart             # pull + compile + restart servers in tmux
+#   bash scripts/vps-update-server.sh --full --restart      # clean rebuild + restart
+#   bash scripts/vps-update-server.sh --no-pull --restart   # compile current tree + restart
 #   bash scripts/vps-update-server.sh --dry-run
-#   FRACTURED_POST_UPDATE_CMD='sudo systemctl restart fractured-world' bash scripts/vps-update-server.sh --run-after
-#   bash scripts/vps-update-server.sh --run-after 'sudo systemctl restart fractured-world'
+#   bash scripts/vps-update-server.sh --run-after 'custom command here'
 #
 # Environment:
-#   FRACTURED_GIT_REMOTE   — remote name (default: origin)
-#   FRACTURED_POST_UPDATE_CMD — shell command run after a successful compile (if --run-after is passed without an argument, this is used)
+#   FRACTURED_GIT_REMOTE        — remote name (default: origin)
+#   FRACTURED_POST_UPDATE_CMD   — shell command run after compile (used by bare --run-after)
 
 set -euo pipefail
 
@@ -35,6 +36,7 @@ FULL_BUILD=0
 COMPILE_ONLY=0
 DRY_RUN=0
 DO_RUN_AFTER=0
+DO_RESTART=0
 INSTALL_PREFIX=""
 POST_UPDATE_CMD="${FRACTURED_POST_UPDATE_CMD:-}"
 GIT_REMOTE="${FRACTURED_GIT_REMOTE:-origin}"
@@ -52,8 +54,9 @@ Options:
   --compile-only  ./acore.sh compiler compile (incremental).
   --prefix PATH   Override CMAKE_INSTALL_PREFIX (updates conf/config.sh BINPATH).
   --dry-run       Print commands without running them.
-  --run-after [CMD]  Run shell command after successful compile. If CMD is omitted,
-                  uses FRACTURED_POST_UPDATE_CMD from the environment.
+  --restart       Kill servers before compile, restart in tmux after.
+  --run-after [CMD]  Run a custom shell command after successful compile.
+                  If CMD is omitted, uses FRACTURED_POST_UPDATE_CMD.
 
 Environment:
   FRACTURED_GIT_REMOTE         Git remote (default: origin).
@@ -102,6 +105,10 @@ while [[ $# -gt 0 ]]; do
       DRY_RUN=1
       shift
       ;;
+    --restart)
+      DO_RESTART=1
+      shift
+      ;;
     --run-after)
       DO_RUN_AFTER=1
       shift
@@ -140,6 +147,18 @@ fi
 
 cd "$ROOT"
 
+KILL_SCRIPT="${SCRIPT_DIR}/kill-azeroth-servers.sh"
+START_SCRIPT="${SCRIPT_DIR}/start-azeroth-servers.sh"
+
+if [[ "$DO_RESTART" -eq 1 ]]; then
+  if [[ ! -f "$KILL_SCRIPT" || ! -f "$START_SCRIPT" ]]; then
+    echo "error: --restart requires kill-azeroth-servers.sh and start-azeroth-servers.sh in scripts/" >&2
+    exit 1
+  fi
+  echo "==> stopping servers before compile"
+  run bash "$KILL_SCRIPT"
+fi
+
 if [[ -n "$INSTALL_PREFIX" ]]; then
   echo "==> updating conf/config.sh BINPATH to: $INSTALL_PREFIX"
   if grep -q '^BINPATH=' conf/config.sh; then
@@ -189,6 +208,11 @@ else
   run ./acore.sh compiler build
 fi
 
+if [[ "$DO_RESTART" -eq 1 ]]; then
+  echo "==> restarting servers in tmux sessions"
+  run bash "$START_SCRIPT"
+fi
+
 if [[ "$DO_RUN_AFTER" -eq 1 ]]; then
   echo "==> post-update: $POST_UPDATE_CMD"
   if [[ "$DRY_RUN" -eq 1 ]]; then
@@ -199,4 +223,8 @@ if [[ "$DO_RUN_AFTER" -eq 1 ]]; then
   fi
 fi
 
-echo "Done. Restart authserver/worldserver (or your service manager) when ready so new binaries and SQL updates apply."
+if [[ "$DO_RESTART" -eq 0 && "$DO_RUN_AFTER" -eq 0 ]]; then
+  echo "Done. Run 'bash scripts/start-azeroth-servers.sh' to (re)start servers in tmux."
+else
+  echo "Done."
+fi