#!/bin/sh
set -e
set -u

__init_git() {

    if command -v git > /dev/null; then
        echo "'git' already installed"
        return 0
    fi

    if [ "Darwin" = "$(uname -s)" ]; then
        echo >&2 "Error: 'git' not found. You may have to re-install 'git' on Mac after every major update."
        echo >&2 "       for example, try: xcode-select --install"
        # sudo xcodebuild -license accept
    else
        echo >&2 "Error: to install 'git' on Linux use the built-in package manager."
        echo >&2 "       for example, try: sudo apt install -y git"
    fi

    exit 1
}

__init_git