dotfiles-config

#!/bin/sh

set -e

config_dir="${HOME}/.dotfiles/.data"
config_rc="${config_dir}/config-rc"
git_config="${HOME}/.local/gitconfig"

case "${1}" in
    -h|--help)
        (
            echo "Usage: $(basename "${0}") [reset]"
            echo
            echo "If first argument is \"reset\", remove local files created "
            echo "by this utility and exit."
            echo
            echo "With no arguments, configure username to hide in shell prompt"
            echo "and email address to use with git."
        ) >&2
        exit 1
        ;;
    reset)
        rm -v "${config_rc}" "${git_config}"
        exit 0
        ;;
esac

if [ -f "${config_rc}" ]; then
    (
        tput setaf 3
        tput bold
        echo "Continuing will overwrite existing ${config_rc}"
        tput sgr0
    ) >&2
fi

prompt_for_value()
{
    prompt="${1?}"
    default="${2-}"
    required="${3-}"
    printf "%s" "${prompt}"
    if [ -n "${default}" ]; then
        printf "%s" " [$(tput bold)${default}$(tput sgr0)]"
    fi
    printf "%s" ": "
    read -r input_value
    if [ -z "${input_value}" ]; then
        input_value="${default}"
    fi
    if [ -n "${required}" ] && [ -z "${input_value}" ]; then
        echo "Error: ${prompt} is required" >&2
        return 1
    fi
}

prompt_for_value "Username" "${prompt_hide_user-${USER}}"
if [ -n "${input_value}" ]; then
    mkdir -vp "${config_dir}"
    if [ -f "${config_rc}" ]; then
        sed -i'' -e '/^prompt_hide_user/d' "${config_rc}"
    fi
    echo "prompt_hide_user=\"${input_value}\"" >> "${config_rc}"
fi

git_email="$(git config --get user.email 2>/dev/null || true)"
prompt_for_value "Email" "${git_email}" "required"
if [ -n "${input_value}" ] && [ "${input_value}" != "${git_email}" ]; then
    git config --file "${git_config}" user.email "${input_value}"
fi