#!/bin/bash
# run_once_00-prereqs.sh
# Verifies that the tools required by later run_once scripts are installed.

set -euo pipefail

missing=()

need_cmd() {
    command -v "$1" >/dev/null 2>&1 || missing+=("$1")
}

need_cmd sudo
need_cmd git
need_cmd curl
need_cmd age         
need_cmd jq           
need_cmd pacman || need_cmd apt-get
need_cmd chezmoi

if (( ${#missing[@]} > 0 )); then
    cat <<EOF
>>> Missing prerequisites: ${missing[*]}

Install them for your distro, then re-run \`chezmoi apply\`:

  Arch:   sudo pacman -S --needed git curl sudo age jq
  Ubuntu: sudo apt-get install -y git curl sudo age jq

\`age\` is also available at https://github.com/FiloSottile/age as a static
binary if your distro does not package it.
EOF
    exit 1
fi

echo ">>> prereqs OK"