linux-adduser2group

#!/usr/bin/env bash
# shellcheck disable=SC2089
# shellcheck disable=SC2090
set -euo pipefail

YP_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." >/dev/null && pwd)"
source ${YP_DIR}/sh/common.inc.sh

# Debian/Ubuntu --help:
#
# adduser USER GROUP
#    Add an existing user to an existing group

#- linux-adduser2group 1.0
## Usage: linux-adduser2group -- USER GROUP
## Add a user to a group cross-platform.
## Arguments are a subset of the Debian/Ubuntu 'adduser'.
##
##   --force-badname Don't check for bad names.
##
##   -h, --help     Display this help and exit
##   -v, --version  Output version information and exit

FORCE_BADNAME=
USER=
GROUP=

if { getopt --test >/dev/null 2>&1 && false; } || [[ "$?" = "4" ]] || false; then
    ARGS=$(getopt -o hv -l help,version,force-badname -n $(basename ${BASH_SOURCE[0]}) -- "$@") || sh_script_usage # editorconfig-checker-disable-line
    eval set -- "${ARGS}"
fi

while [[ $# -gt 0 ]]; do
    case "$1" in
        --force-badname)
            FORCE_BADNAME=true
            shift
            ;;
        -h|--help)
            sh_script_usage
            ;;
        -v|--version)
            sh_script_version
            ;;
        --)
            shift
            break
            ;;
        -*)
            sh_script_usage
            ;;
        *)
            break
            ;;
    esac
done
# [[ $# -eq 0 ]] || sh_script_usage

USER="$1"
GROUP="$2"

[[ -n "${USER}" ]] || {
    echo_err "Please provide a USER name."
    exit 1
}

[[ -n "${GROUP}" ]] || {
    echo_err "Please provide a GROUP name."
    exit 1
}

case ${OS_SHORT}-${OS_RELEASE_ID}-${OS_RELEASE_VERSION_ID} in
    linux-alpine-*)
        ARGS=()
        [[ "${FORCE_BADNAME}" != "true" ]] || \
            echo_warn "'--force-badname' is not supported. Trying anyway."
        ARGS+=("${USER}")
        ARGS+=("${GROUP}")
        exe ${YP_SUDO:-} /usr/sbin/addgroup "${ARGS[@]}"
        ;;
    linux-arch-*|linux-amzn-*|linux-centos-*|linux-rhel-*)
        ARGS=()
        [[ "${FORCE_BADNAME}" != "true" ]] || ARGS+=("--badnames")
        ARGS+=("-a")
        ARGS+=("-G" "${GROUP}")
        ARGS+=("${USER}")
        exe ${YP_SUDO:-} /usr/sbin/usermod "${ARGS[@]}"
        ;;
    linux-debian-*|linux-ubuntu-*)
        ARGS=()
        [[ "${FORCE_BADNAME}" != "true" ]] || ARGS+=("--force-badname")
        ARGS+=("${USER}")
        ARGS+=("${GROUP}")
        exe ${YP_SUDO:-} /usr/sbin/adduser "${ARGS[@]}"
        ;;
    *)
        echo_err "${OS_SHORT}-${OS_RELEASE_ID}-${OS_RELEASE_VERSION_ID} is an unsupported OS for adding a user to a group."
        exit 1
        ;;
esac