install.sh

#!/usr/bin/env bash

set -euo pipefail

script_dir="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd -P)"
skills_cli_version="1.5.22"
minimum_node_version="22.20.0"

usage() {
  cat >&2 <<EOF
Usage:
  ${0##*/}                          Install into the current project
  ${0##*/} --project <project-dir>  Install into the specified project (relative or absolute)
  ${0##*/} --global                 Install for the current user
  ${0##*/} -h | --help              Show this help
EOF
}

mode="project"
project_root="${PWD}"

case "$#" in
  0)
    ;;
  1)
    case "$1" in
      --global)
        mode="global"
        ;;
      -h|--help)
        usage
        exit 0
        ;;
      *)
        usage
        exit 2
        ;;
    esac
    ;;
  2)
    if [[ "$1" == "--project" ]]; then
      project_root="$2"
    else
      usage
      exit 2
    fi
    ;;
  *)
    usage
    exit 2
    ;;
esac

command -v node >/dev/null 2>&1 || {
  printf 'Error: Node.js %s or newer is required.\n' "$minimum_node_version" >&2
  exit 1
}

node_version="$(node --version 2>/dev/null || true)"
node_version="${node_version#v}"
IFS=. read -r node_major node_minor node_patch <<< "$node_version"
node_patch="${node_patch%%-*}"

if [[ ! "$node_major" =~ ^[0-9]+$ || ! "$node_minor" =~ ^[0-9]+$ || ! "$node_patch" =~ ^[0-9]+$ ]]; then
  printf 'Error: unable to determine the installed Node.js version.\n' >&2
  exit 1
fi

if (( node_major < 22 || (node_major == 22 && node_minor < 20) )); then
  printf 'Error: Node.js %s or newer is required; found %s.\n' "$minimum_node_version" "$node_version" >&2
  exit 1
fi

command -v npx >/dev/null 2>&1 || {
  printf 'Error: npx is required to install through the skills.sh CLI.\n' >&2
  exit 1
}

if ! compgen -G "${script_dir}/*/SKILL.md" >/dev/null; then
  printf 'Error: no direct child Skill directories were found in %s.\n' "${script_dir}" >&2
  exit 1
fi

if [[ "$mode" == "global" ]]; then
  printf 'Installing local Skills for the current user through the skills.sh CLI...\n'
  exec npx --yes "skills@${skills_cli_version}" add "${script_dir}" --skill '*' --agent codex --global --yes --copy
fi

if [[ ! -d "$project_root" ]]; then
  printf 'Error: project directory does not exist: %s\n' "$project_root" >&2
  exit 1
fi

project_root="$(cd -- "$project_root" && pwd -P)"

if [[ "$project_root" == "$script_dir" || "$project_root" == "${script_dir}/"* ]]; then
  printf 'Error: refusing to install the Skill into its source directory or a descendant.\n' >&2
  printf 'Run this script from a target project or use --project <project-dir>.\n' >&2
  exit 1
fi

printf 'Installing local Skills into project %s through the skills.sh CLI...\n' "$project_root"
cd -- "$project_root"
exec npx --yes "skills@${skills_cli_version}" add "${script_dir}" --skill '*' --agent codex --yes --copy