#!/bin/sh
# run-debug.sh — launch xenomorphic in an isolated debug sandbox.
#
# The app, its daemon, and all persisted state resolve one directory through
# xeno::paths::configDir(): ${XDG_CONFIG_HOME:-$HOME/.config}/xenomorphic. The
# app passes its environment to the daemon it spawns. Pointing XDG_CONFIG_HOME
# at a throwaway dir therefore gives this instance its own daemon, daemon.json,
# session.json, settings.json, and workspaces/. HOME stays untouched, so the
# shells this instance spawns keep the real dotfiles and git/jj identity.
#
# Usage: run-debug.sh <binary> <sandbox-dir> [args...]
#
# The sandbox is wiped before and after every run. The daemon outlives the app
# by design (that is how panes survive a restart), so both ends send SIGTERM to
# the sandbox daemon recorded in daemon.json, then remove the sandbox. Without
# that, each run would leak a detached daemon and its shells.
set -eu

binary=$1
shift
sandbox=$1
shift

if [ ! -x "$binary" ]; then
  echo "run-debug: not executable: $binary" >&2
  exit 1
fi

# Stop the sandbox daemon if a previous run left one behind. Match the pid in
# daemon.json against a live xenomorphicd so a recycled pid is never killed.
stop_sandbox_daemon() {
  disc="$sandbox/xenomorphic/daemon.json"
  [ -f "$disc" ] || return 0
  pid=$(sed -n 's/.*"pid"[[:space:]]*:[[:space:]]*\([0-9][0-9]*\).*/\1/p' \
        "$disc" | head -n 1)
  [ -n "$pid" ] || return 0
  if ps -p "$pid" -o comm= 2>/dev/null | grep -q 'xenomorphicd'; then
    kill "$pid" 2>/dev/null || true
    # SIGTERM runs the daemon's graceful daemonDown path; give it a moment
    # before the sandbox disappears under it.
    i=0
    while [ "$i" -lt 50 ] && kill -0 "$pid" 2>/dev/null; do
      sleep 0.1
      i=$((i + 1))
    done
  fi
}

cleanup() {
  stop_sandbox_daemon
  rm -rf "$sandbox"
}

# Ctrl-C reaches the whole foreground process group, so reap the daemon even if
# the app is killed before it returns.
trap 'cleanup; exit 130' INT TERM

cleanup
mkdir -p "$sandbox"

status=0
XDG_CONFIG_HOME="$sandbox" "$binary" "$@" || status=$?

cleanup
exit "$status"