script_dir="$(cd "$(dirname "$0")" && pwd)"
base="$script_dir/pr" if common_git_dir=$(git -C "$script_dir" rev-parse --path-format=absolute --git-common-dir 2>/dev/null); then
canonical_base="$(dirname "$common_git_dir")/scripts/pr" if [ -x "$canonical_base" ]; then
base="$canonical_base"
fi
fi