#!/usr/bin/env bash
#
# Kill leftover CI test processes (zenserver, minio, nomad, consul) whose
# executable lives under the given build directory.
#
# Used by CI workflows to clean up any test processes from a previous run
# before starting a new one, and to reap any that are still running after
# the run finishes.
#
# Usage: kill-test-processes.sh <label> <build_dir>
#   label:     word printed in log messages, e.g. "stale" or "leftover"
#   build_dir: absolute path; only processes whose executable is under this
#              directory are killed.
#
# We resolve each PID's actual executable path rather than relying on argv
# (which `pgrep -a` reports). argv starts with the short process name (e.g.
# "consul") regardless of how the process was launched, so a pure argv prefix
# match never fires and leftovers silently survived between runs.

set -u

label=${1:?label required}
build_dir=${2:?build_dir required}

get_exe_path() {
  local pid=$1
  if [[ -r "/proc/$pid/exe" ]]; then
    # Linux
    readlink -f "/proc/$pid/exe" 2>/dev/null || true
  else
    # macOS fallback: the "txt" file descriptor points at the process binary
    lsof -p "$pid" -Fn -a -d txt 2>/dev/null | awk '/^n/{print substr($0,2); exit}' || true
  fi
}

for name in zenserver minio nomad consul; do
  while read -r pid; do
    [[ -z "$pid" ]] && continue
    exe=$(get_exe_path "$pid")
    if [[ "$exe" == "$build_dir"* ]]; then
      echo "Killing $label $name (PID $pid): $exe"
      kill -9 "$pid" 2>/dev/null || true
    fi
  done < <(pgrep -x "$name" 2>/dev/null || true)
done