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

repo_root="$(git rev-parse --show-toplevel)"
hook="$repo_root/.git/hooks/pre-push"

if [[ -e "$hook" && ! -f "$hook" ]]; then
  printf 'Cannot install guard: %s is not a regular file.\n' "$hook" >&2
  exit 1
fi

if [[ -f "$hook" ]] && ! grep -Fq 'scripts/check_public_content.sh' "$hook"; then
  printf 'Cannot install guard: existing pre-push hook is not managed by this repository.\n' >&2
  exit 1
fi

cat > "$hook" <<'EOF'
#!/usr/bin/env bash
set -euo pipefail
repo_root="$(git rev-parse --show-toplevel)"
exec bash "$repo_root/scripts/check_public_content.sh"
EOF
chmod +x "$hook"
printf 'Installed public-content pre-push guard.\n'