#!/usr/bin/env bash set -euo pipefail check_manifest_for_agpl () {    local cargo_toml="$1"     if grep -Eiq '(agpl|affero)' "$cargo_toml"; then        echo "Error: $cargo_toml references an AGPL license. First-party crates must use LICENSE-GPL or LICENSE-APACHE."        exit 1    fi     if grep -Eiq '^[[:space:]]*license-file[[:space:]]*=' "$cargo_toml"; then        echo "Error: $cargo_toml uses license-file. First-party crates must declare LICENSE-GPL or LICENSE-APACHE via the license field and symlink."        exit 1    fi} check_no_agpl_license_file () {    if [[ -e "LICENSE-AGPL" || -L "LICENSE-AGPL" ]]; then        echo "Error: LICENSE-AGPL exists. First-party code must use LICENSE-GPL or LICENSE-APACHE."        exit 1    fi     while IFS= read -r -d '' license_file; do        if [[ -e "$license_file" || -L "$license_file" ]]; then            echo "Error: $license_file exists. First-party crates must use LICENSE-GPL or LICENSE-APACHE."            exit 1        fi    done < <(git ls-files -z -- "*/LICENSE-AGPL")} check_symlink_target () {    local symlink_path="$1"    local license_name="$2"     local target=$(readlink "$symlink_path")     local dir=$(dirname "$symlink_path")    local depth=$(echo "$dir" | tr '/' '\n' | wc -l)    local expected_prefix=""    for ((i = 0; i < depth; i++)); do        expected_prefix="../$expected_prefix"    done    local expected_target="${expected_prefix}${license_name}"     if [[ "$target" != "$expected_target" ]]; then        echo "Error: $symlink_path points to '$target' but should point to '$expected_target'"        exit 1    fi     if [[ ! -e "$symlink_path" ]]; then        echo "Error: $symlink_path is a broken symlink (target '$target' does not exist)"        exit 1    fi} check_license () {    local dir="$1"    local allowed_licenses=("LICENSE-GPL" "LICENSE-APACHE")     for license in "${allowed_licenses[@]}"; do        if [[ -L "$dir/$license" ]]; then            check_symlink_target "$dir/$license" "$license"            return 0        elif [[ -e "$dir/$license" ]]; then            echo "Error: $dir/$license exists but is not a symlink."            exit 1        fi    done     echo "Error: $dir does not contain a LICENSE-GPL or LICENSE-APACHE symlink"    exit 1} check_no_agpl_license_file git ls-files -z -- "Cargo.toml" "**/Cargo.toml" | while IFS= read -r -d '' cargo_toml; do    check_manifest_for_agpl "$cargo_toml"     if [[ "$cargo_toml" == */Cargo.toml ]]; then        check_license "$(dirname "$cargo_toml")"    fidone echo "check-licenses succeeded"