#!/usr/bin/env bash
set -euo pipefail

# Common helpers for AI guardrail scripts

# Robustly resolve the repository root directory.
# Strategy: prefer Git; fallback to marker search upwards; last resort: current dir.
resolve_repo_root() {
  local start
  start="${1:-$(cd -- "$(dirname "${BASH_SOURCE[0]}")" >/dev/null 2>&1 && pwd)}"
  if command -v git >/dev/null 2>&1; then
    if git -C "$start" rev-parse --show-toplevel >/dev/null 2>&1; then
      git -C "$start" rev-parse --show-toplevel
      return 0
    fi
  fi
  local dir
  dir="$(cd "$start" && pwd)"
  while [ "$dir" != "/" ]; do
    if [ -f "$dir/gradlew" ] || [ -f "$dir/settings.gradle.kts" ] || [ -d "$dir/.git" ]; then
      echo "$dir"
      return 0
    fi
    dir="$(dirname "$dir")"
  done
  pwd
}