#! /usr/bin/env sh

# ╭───────────────╮
# │ __ = internal │
# ╰───────────────╯

# __SPCD_BANNER_TOP
# __SPCD_BANNER_MIDDLE
# __SPCD_BANNER_BOTTOM

# __SPCD_STEP_LEVEL
# __SPCD_STEP_level_INDEX
# __SPCD_STEP_level_LABEL

# ╭─────────────╮
# │ _ = private │
# ╰─────────────╯

_SPCD_BOX_DOWN_AND_HORIZONTAL="┬"
_SPCD_BOX_DOWN_AND_LEFT="╮"
_SPCD_BOX_DOWN_AND_RIGHT="╭"
_SPCD_BOX_HORIZONTAL="─"
_SPCD_BOX_LEFT="╴"
_SPCD_BOX_UP_AND_HORIZONTAL="┴"
_SPCD_BOX_UP_AND_LEFT="╯"
_SPCD_BOX_UP_AND_RIGHT="╰"
_SPCD_BOX_VERTICAL="│"

_SPCD_CMD_SUM="sha512sum"

_spcd_fill() {
    local index="${1}"
    while [ "${index}" -gt 0 ]; do
        printf "%s" "${2}"
        index=$((index - 1))
    done
}

# ╭───┬────────╮
# │ _ │ banner │
# ╰───┴────────╯

_SPCD_BANNER_BOTTOM_LEFT="${_SPCD_BOX_UP_AND_RIGHT}"
_SPCD_BANNER_BOTTOM_MIDDLE="${_SPCD_BOX_UP_AND_HORIZONTAL}"
_SPCD_BANNER_BOTTOM_RIGHT="${_SPCD_BOX_UP_AND_LEFT}"
_SPCD_BANNER_HORIZONTAL="${_SPCD_BOX_HORIZONTAL}"
_SPCD_BANNER_TOP_LEFT="${_SPCD_BOX_DOWN_AND_RIGHT}"
_SPCD_BANNER_TOP_MIDDLE="${_SPCD_BOX_DOWN_AND_HORIZONTAL}"
_SPCD_BANNER_TOP_RIGHT="${_SPCD_BOX_DOWN_AND_LEFT}"
_SPCD_BANNER_VERTICAL="${_SPCD_BOX_VERTICAL}"

_spcd_banner_add() {
    if [ -n "${1}" ]; then
        local text length filler
        text=" ${1} "
        length=${#text}
        filler="$(_spcd_fill "${length}" "${_SPCD_BANNER_HORIZONTAL}")"
        if [ -n "${__SPCD_BANNER_MIDDLE}" ]; then
            _spcd_banner_split
        else
            _spcd_banner_open
        fi
        _spcd_banner_append "${filler}" "${text}" "${filler}"
    fi
}

_spcd_banner_add_index() {
    local level value label
    while true; do
        level=$((level + 1))
        eval "value=\"\${__SPCD_STEP_${level}_INDEX}\""
        [ -n "${value}" ] || break
        if [ -n "${label}" ]; then
            label="${label}.${value}"
        else
            label="${value}"
        fi
    done
    _spcd_banner_add "${label}"
}

_spcd_banner_append() {
    if [ -n "${3}" ]; then
        __SPCD_BANNER_TOP="${__SPCD_BANNER_TOP}${1}"
        __SPCD_BANNER_MIDDLE="${__SPCD_BANNER_MIDDLE}${2}"
        __SPCD_BANNER_BOTTOM="${__SPCD_BANNER_BOTTOM}${3}"
    fi
}

_spcd_banner_echo() {
    echo "\
${__SPCD_BANNER_TOP}
${__SPCD_BANNER_MIDDLE}
${__SPCD_BANNER_BOTTOM}"
}

_spcd_banner_open() {
    _spcd_banner_append \
        "${_SPCD_BANNER_TOP_LEFT}" \
        "${_SPCD_BANNER_VERTICAL}" \
        "${_SPCD_BANNER_BOTTOM_LEFT}"
}

_spcd_banner_render() {
    _spcd_banner_wipe
    _spcd_banner_add "S"
    _spcd_banner_add_index
    #
    local level value
    while true; do
        level=$((level + 1))
        eval "value=\"\${__SPCD_STEP_${level}_LABEL}\""
        [ -n "${value}" ] || break
        _spcd_banner_add "${value}"
    done
    #
    _spcd_banner_shut
    _spcd_banner_echo
    _spcd_banner_wipe
}

_spcd_banner_shut() {
    _spcd_banner_append \
        "${_SPCD_BANNER_TOP_RIGHT}" \
        "${_SPCD_BANNER_VERTICAL}" \
        "${_SPCD_BANNER_BOTTOM_RIGHT}"
}

_spcd_banner_split() {
    _spcd_banner_append \
        "${_SPCD_BANNER_TOP_MIDDLE}" \
        "${_SPCD_BANNER_VERTICAL}" \
        "${_SPCD_BANNER_BOTTOM_MIDDLE}"
}

_spcd_banner_wipe() {
    unset \
        __SPCD_BANNER_TOP \
        __SPCD_BANNER_MIDDLE \
        __SPCD_BANNER_BOTTOM
}

# ╭───┬───────╮
# │ _ │ error │
# ╰───┴───────╯

_SPCD_ERROR_CI=1
_SPCD_ERROR_OS=2

# ╭───┬───────╮
# │ _ │ frame │
# ╰───┴───────╯

_SPCD_FRAME_TOP="${_SPCD_BOX_DOWN_AND_RIGHT}${_SPCD_BOX_LEFT}"
_SPCD_FRAME_BOTTOM="${_SPCD_BOX_UP_AND_RIGHT}${_SPCD_BOX_LEFT}"

_spcd_frame_open() {
    echo "${_SPCD_FRAME_TOP}${*}"
}

_spcd_frame_shut() {
    echo "${_SPCD_FRAME_BOTTOM}${*}"
}

# ╭───┬────╮
# │ _ │ os │
# ╰───┴────╯

_spcd_os_cat() {
    if [ -n "${1}" ]; then
        _spcd_frame_open "${1}"
        cat "${1}"
        _spcd_frame_shut "${1}"
    fi
}

# ╭───┬──────╮
# │ _ │ rule │
# ╰───┴──────╯

_SPCD_RULE_LEFT="╶"
_SPCD_RULE_MIDDLE="─"
_SPCD_RULE_RIGHT="╴"

# ╭───┬──────╮
# │ _ │ step │
# ╰───┴──────╯

_spcd_step_wipe() {
    unset \
        "__SPCD_STEP_${__SPCD_STEP_LEVEL}_INDEX" \
        "__SPCD_STEP_${__SPCD_STEP_LEVEL}_LABEL"
}

# ╭───┬─────╮
# │ _ │ txt │
# ╰───┴─────╯

_SPCD_TXT_CHARSET="UTF-8"
_SPCD_TXT_LOCALE_DEFAULT="C"

_spcd_txt_pick() {
    case "${SPCD_TXT_LOCALE}" in
    "${SPCD_TXT_LOCALE_ENGLISH}") echo "${1}" ;;
    "${SPCD_TXT_LOCALE_FRENCH}") echo "${2}" ;;
    *) ;;
    esac
}

# ╭────────────╮
# │ p = public │
# ╰────────────╯

spcd_ca() {
    local grep="\(After\|Before\|Issuer\|Signature Algorithm\|Subject:\)"
    local index name value
    local root="${2}"
    while true; do
        index=$((index + 1))
        name="SPCD_CA_${index}"
        eval "value=\"\${${name}}\""
        [ -n "${value}" ] || break
        case "${1}" in
        "list")
            echo "${name} ="
            echo "${value}" |
                openssl x509 -noout -text |
                grep "${grep}"
            ;;
        "write")
            spcd_os_write "${root}/${index}.crt" "${value}"
            ;;
        *) ;;
        esac
    done
}

spcd_dns() {
    local index name text value
    while true; do
        index=$((index + 1))
        name="SPCD_DNS_${index}"
        eval "value=\"\${${name}}\""
        [ -n "${value}" ] || break
        case "${1}" in
        "list")
            spcd_os_printenv "${name}"
            ;;
        "write")
            text="${text}\
nameserver ${value}
"
            ;;
        *) ;;
        esac
    done
    if [ "${1}" = "write" ]; then
        spcd_os_write "/etc/resolv.conf" "${text}"
    fi
}

spcd_run() {
    if [ -n "${1}" ]; then
        _spcd_frame_open "${@}"
        "${@}"
        _spcd_frame_shut "${@}"
    fi
}

# ╭───┬───────╮
# │ p │ error │
# ╰───┴───────╯

spcd_error_ci() {
    echo "× CI: ${*}"
    exit "${_SPCD_ERROR_CI}"
}

spcd_error_os() {
    printf "× OS: "
    spcd_os_printenv "${1}"
    exit "${_SPCD_ERROR_OS}"
}

# ╭───┬────╮
# │ p │ os │
# ╰───┴────╯

spcd_os_grep() {
    local variable="${1}"
    [ -n "${variable}" ] &&
        grep "^${variable}=" "/etc/os-release" |
        sed "s|^${variable}=||" |
            sed "s|^\"\(.*\)\"$|\1|"
}

spcd_os_ls() {
    if [ -n "${1}" ]; then
        _spcd_frame_open "${1}"
        ls -a -l "${1}"
        _spcd_frame_shut "${1}"
    fi
}

spcd_os_mkdir() {
    echo "→ ${1}"
    mkdir --parents "${1}"
}

spcd_os_printenv() {
    if [ -n "${1}" ]; then
        local name text
        for name in "${@}"; do
            eval "text=\"\${${name}}\""
            echo "${name} = \"${text}\""
        done
    fi
}

spcd_os_rm() {
    if [ -e "${1}" ]; then
        echo "← ${1}"
        rm -r "${1}"
    fi
}

spcd_os_sed() {
    local file="${1}"
    shift
    if [ -f "${file}" ]; then
        local regex
        _spcd_os_cat "${file}"
        for regex in "${@}"; do
            sed --in-place "s${regex}g" "${file}" &&
                _spcd_os_cat "${file}"
        done
    fi
}

spcd_os_write() {
    local file="${1}"
    local text="${2}"
    if [ -n "${file}" ]; then
        [ -f "${file}" ] &&
            _spcd_os_cat "${file}"
        echo "→ ${file}"
        printf "%s" "${text}" >"${file}"
        _spcd_os_cat "${file}"
    fi
}

# ╭───┬───────╮
# │ p │ split │
# ╰───┴───────╯

spcd_split() {
    echo "${_SPCD_RULE_LEFT}${_SPCD_RULE_MIDDLE}${_SPCD_RULE_RIGHT}"
}

# ╭───┬──────╮
# │ p │ step │
# ╰───┴──────╯

spcd_step() {
    if [ -n "${1}" ]; then
        [ -n "${__SPCD_STEP_LEVEL}" ] || __SPCD_STEP_LEVEL=1
        local prefix="__SPCD_STEP_${__SPCD_STEP_LEVEL}"
        local index="${prefix}_INDEX"
        eval "${index}=\$((${index} + 1))"
        eval "${prefix}_LABEL=\"${1}\""
        _spcd_banner_render
    fi
}

spcd_step_in() {
    [ -n "${1}" ] && spcd_step "${1}"
    __SPCD_STEP_LEVEL=$((__SPCD_STEP_LEVEL + 1))
    _spcd_step_wipe
}

spcd_step_out() {
    _spcd_step_wipe
    __SPCD_STEP_LEVEL=$((__SPCD_STEP_LEVEL - 1))
}

# ╭───┬─────╮
# │ p │ txt │
# ╰───┴─────╯

SPCD_TXT_LOCALE_ENGLISH="en_US"
SPCD_TXT_LOCALE_FRENCH="fr_FR"

spcd_txt_get() {
    case "${1}" in
    "set") _spcd_txt_pick "Set" "Définir" ;;
    *) ;;
    esac
}

# ╭──────────╮
# │ s = step │
# ╰──────────╯

# ╭───┬───────────╮
# │ s │ constants │
# ╰───┴───────────╯

SPCD_OS_ALMA="alma"
SPCD_OS_ALPINE="alpine"
SPCD_OS_ARCH="arch"
SPCD_OS_DEBIAN="debian"
SPCD_OS_FEDORA="fedora"
SPCD_OS_OPENSUSE="opensuse"
SPCD_OS_ROCKY="rocky"
SPCD_OS_UBUNTU="ubuntu"

SPCD_PM_APK="apk"
SPCD_PM_APT="apt"
SPCD_PM_DNF="dnf"
SPCD_PM_PACMAN="pacman"
SPCD_PM_ZYPPER="zypper"

# ╭───┬─────────────╮
# │ s │ environment │
# ╰───┴─────────────╯

spcd_step__environment_print() {
    spcd_ca "list"
    spcd_dns "list"
    set -- \
        "GIT_RWX" \
        "GIT_SPCD" \
        "GIT_SHUNIT" \
        "REF_FEATURE" \
        "REF_RELEASE" \
        "REF_STAGING" \
        "TXT_LOCALE" \
        "URL_ALMA" \
        "URL_ALPINE" \
        "URL_ARCH" \
        "URL_DEBIAN" \
        "URL_EPEL" \
        "URL_FEDORA" \
        "URL_OPENSUSE" \
        "URL_PYTHON" \
        "URL_ROCKY" \
        "URL_UBUNTU"
    local item name value
    for item in "${@}"; do
        name="SPCD_${item}"
        eval "value=\"\${${name}}\""
        if [ -n "${value}" ]; then
            spcd_os_printenv "${name}"
        fi
    done
}

spcd_step__environment_defaults_set() {
    spcd_step "$(spcd_txt_get "set")"

    [ -n "${SPCD_DNS_1}" ] || SPCD_DNS_1="9.9.9.9"

    [ -n "${SPCD_GIT_RWX}" ] || SPCD_GIT_RWX="rwx"
    [ -n "${SPCD_GIT_SPCD}" ] || SPCD_GIT_SPCD="spcd"

    [ -n "${SPCD_GIT_SHUNIT}" ] || SPCD_GIT_SHUNIT="shunit2"

    [ -n "${SPCD_REF_FEATURE}" ] || SPCD_REF_FEATURE="f"
    [ -n "${SPCD_REF_RELEASE}" ] || SPCD_REF_RELEASE="main"
    [ -n "${SPCD_REF_STAGING}" ] || SPCD_REF_STAGING="dev"

    [ -n "${SPCD_TXT_LOCALE}" ] ||
        SPCD_TXT_LOCALE="${SPCD_TXT_LOCALE_ENGLISH}"

    [ -n "${SPCD_URL_ALMA}" ] ||
        # /almalinux/$releasever/…
        # /vault/$releasever/…
        SPCD_URL_ALMA="https://repo.almalinux.org"
    [ -n "${SPCD_URL_ALPINE}" ] ||
        # /v?.??/community
        # /v?.??/main
        SPCD_URL_ALPINE="https://dl-cdn.alpinelinux.org/alpine"
    [ -n "${SPCD_URL_ARCH}" ] ||
        # /$repo/os/$arch
        SPCD_URL_ARCH="https://geo.mirror.pkgbuild.com"
    [ -n "${SPCD_URL_DEBIAN}" ] ||
        SPCD_URL_DEBIAN="https://deb.debian.org/debian"
    [ -n "${SPCD_URL_EPEL}" ] ||
        # /$releasever/Everything/…
        # /testing/$releasever/Everything/…
        SPCD_URL_EPEL="https://dl.fedoraproject.org/pub/epel"
    [ -n "${SPCD_URL_FEDORA}" ] ||
        # /releases/$releasever/Everything/…
        # /updates/$releasever/Everything/…
        # /updates/testing/$releasever/Everything/…
        SPCD_URL_FEDORA="https://rpmfind.net/linux/fedora/linux"
    [ -n "${SPCD_URL_OPENSUSE}" ] ||
        # /debug/…
        # /distribution/…
        # /source/…
        # /update/…
        SPCD_URL_OPENSUSE="https://download.opensuse.org"
    [ -n "${SPCD_URL_PYTHON}" ] ||
        # /simple
        SPCD_URL_PYTHON="https://pypi.org"
    [ -n "${SPCD_URL_ROCKY}" ] ||
        # /$contentdir/$releasever/…
        SPCD_URL_ROCKY="https://dl.rockylinux.org"
    [ -n "${SPCD_URL_UBUNTU}" ] ||
        SPCD_URL_UBUNTU="https://ubuntu.mirrors.ovh.net/ubuntu"
}

spcd_step__environment_set_variables() {
    spcd_step "Set variables"
    # check script first
    [ -n "${SPCD}" ] || spcd_error_ci "SPCD"
    # continuous integration / github → gitea → forgejo
    if [ -n "${GITHUB_ACTIONS}" ]; then
        # project branch
        if [ -n "${GITHUB_REF_NAME}" ]; then
            SPCD_PROJECT_BRANCH="${GITHUB_REF_NAME}"
        else
            spcd_error_ci "GITHUB_REF_NAME"
        fi
        # project root
        if [ -n "${GITHUB_SERVER_URL}" ]; then
            SPCD_PROJECT_ROOT="$(dirname "${GITHUB_SERVER_URL}")//"
            [ -n "${GITHUB_TOKEN}" ] &&
                SPCD_PROJECT_ROOT="${SPCD_PROJECT_ROOT}${GITHUB_TOKEN}@"
            SPCD_PROJECT_ROOT="\
${SPCD_PROJECT_ROOT}$(basename "${GITHUB_SERVER_URL}")"
        else
            spcd_error_ci "GITHUB_SERVER_URL"
        fi
        # project path & name
        if [ -n "${GITHUB_REPOSITORY}" ]; then
            # project path
            SPCD_PROJECT_PATH="$(dirname "${GITHUB_REPOSITORY}")"
            # project name
            SPCD_PROJECT_NAME="$(basename "${GITHUB_REPOSITORY}")"
        else
            spcd_error_ci "GITHUB_REPOSITORY"
        fi
    # continuous integration / gitlab
    elif [ -n "${GITLAB_CI}" ]; then
        # project branch
        if [ -n "${CI_COMMIT_BRANCH}" ]; then
            SPCD_PROJECT_BRANCH="${CI_COMMIT_BRANCH}"
        else
            spcd_error_ci "CI_COMMIT_BRANCH"
        fi
        # project root / protocol
        if [ -n "${CI_SERVER_PROTOCOL}" ]; then
            # project root / login
            if [ -n "${CI_REGISTRY_USER}" ]; then
                # project root / password
                if [ -n "${CI_REGISTRY_PASSWORD}" ]; then
                    # project root / host
                    if [ -n "${CI_SERVER_FQDN}" ]; then
                        # project root
                        SPCD_PROJECT_ROOT="${CI_SERVER_PROTOCOL}\
://${CI_REGISTRY_USER}:${CI_REGISTRY_PASSWORD}@${CI_SERVER_FQDN}"
                        # project path
                        if [ -n "${CI_PROJECT_NAMESPACE}" ]; then
                            SPCD_PROJECT_PATH="${CI_PROJECT_NAMESPACE}"
                            # project name
                            if [ -n "${CI_PROJECT_NAME}" ]; then
                                SPCD_PROJECT_NAME="${CI_PROJECT_NAME}"
                            else
                                spcd_error_ci "CI_PROJECT_NAME"
                            fi
                        else
                            spcd_error_ci "CI_PROJECT_NAMESPACE"
                        fi
                    else
                        spcd_error_ci "CI_SERVER_FQDN"
                    fi
                else
                    spcd_error_ci "CI_REGISTRY_PASSWORD"
                fi
            else
                spcd_error_ci "CI_REGISTRY_USER"
            fi
        else
            spcd_error_ci "CI_SERVER_PROTOCOL"
        fi
    # continuous integration / unsupported
    else
        spcd_error_ci "ø"
    fi
    # check project variables
    case "${SPCD_PROJECT_BRANCH}" in
    "${SPCD_REF_RELEASE}" | \
        "${SPCD_REF_STAGING}" | \
        "${SPCD_REF_FEATURE}") ;;
    *) spcd_error_ci "SPCD_PROJECT_BRANCH" ;;
    esac
    [ -n "${SPCD_PROJECT_ROOT}" ] || spcd_error_ci "SPCD_PROJECT_ROOT"
    [ -n "${SPCD_PROJECT_PATH}" ] || spcd_error_ci "SPCD_PROJECT_PATH"
    [ -n "${SPCD_PROJECT_NAME}" ] || spcd_error_ci "SPCD_PROJECT_NAME"
    #
    spcd_os_printenv "SPCD_PROJECT_BRANCH" \
        "SPCD_PROJECT_ROOT" "SPCD_PROJECT_PATH" "SPCD_PROJECT_NAME"
    # set operating system id
    SPCD_OS_ID="$(spcd_os_grep ID)"
    case "${SPCD_OS_ID}" in
    "almalinux") SPCD_OS_ID="${SPCD_OS_ALMA}" ;;
    "alpine") SPCD_OS_ID="${SPCD_OS_ALPINE}" ;;
    "arch") SPCD_OS_ID="${SPCD_OS_ARCH}" ;;
    "debian") SPCD_OS_ID="${SPCD_OS_DEBIAN}" ;;
    "fedora") SPCD_OS_ID="${SPCD_OS_FEDORA}" ;;
    "opensuse-leap") SPCD_OS_ID="${SPCD_OS_OPENSUSE}" ;;
    "rocky") SPCD_OS_ID="${SPCD_OS_ROCKY}" ;;
    "ubuntu") SPCD_OS_ID="${SPCD_OS_UBUNTU}" ;;
    *) spcd_error_os "SPCD_OS_ID" ;;
    esac
    # set operating system version
    case "${SPCD_OS_ID}" in
    "${SPCD_OS_ALMA}" | "${SPCD_OS_FEDORA}" | "${SPCD_OS_ROCKY}" | \
        "${SPCD_OS_ARCH}")
        SPCD_OS_VERSION=$(spcd_os_grep VERSION_ID |
            sed "s|^\([0-9]\+\)\..*|\1|")
        ;;
    "${SPCD_OS_ALPINE}" | "${SPCD_OS_OPENSUSE}")
        SPCD_OS_VERSION=$(spcd_os_grep VERSION_ID |
            sed "s|^\([0-9]\+\.[0-9]\+\)\..*|\1|")
        ;;
    "${SPCD_OS_DEBIAN}" | "${SPCD_OS_UBUNTU}")
        SPCD_OS_VERSION="$(spcd_os_grep VERSION_CODENAME)"
        ;;
    *) ;;
    esac
    # check operating system version
    case "${SPCD_OS_ID}" in
    "${SPCD_OS_ALMA}" | "${SPCD_OS_ROCKY}")
        case "${SPCD_OS_VERSION}" in
        "9" | "8") ;;
        *) spcd_error_os "SPCD_OS_VERSION" ;;
        esac
        ;;
    "${SPCD_OS_ALPINE}")
        case "${SPCD_OS_VERSION}" in
        "3.20" | "3.19") ;;
        *) spcd_error_os "SPCD_OS_VERSION" ;;
        esac
        ;;
    "${SPCD_OS_ARCH}")
        case "${SPCD_OS_VERSION}" in
        "20240818" | "20240101") ;;
        *) spcd_error_os "SPCD_OS_VERSION" ;;
        esac
        ;;
    "${SPCD_OS_DEBIAN}")
        case "${SPCD_OS_VERSION}" in
        "bookworm" | "bullseye") ;;
        *) spcd_error_os "SPCD_OS_VERSION" ;;
        esac
        ;;
    "${SPCD_OS_FEDORA}")
        case "${SPCD_OS_VERSION}" in
        "40" | "39") ;;
        *) spcd_error_os "SPCD_OS_VERSION" ;;
        esac
        ;;
    "${SPCD_OS_OPENSUSE}")
        case "${SPCD_OS_VERSION}" in
        "15.6" | "15.5") ;;
        *) spcd_error_os "SPCD_OS_VERSION" ;;
        esac
        ;;
    "${SPCD_OS_UBUNTU}")
        case "${SPCD_OS_VERSION}" in
        "noble" | "jammy") ;;
        *) spcd_error_os "SPCD_OS_VERSION" ;;
        esac
        ;;
    *) ;;
    esac
    spcd_split
    spcd_os_printenv "SPCD_OS_ID" "SPCD_OS_VERSION"
    # set package manager
    case "${SPCD_OS_ID}" in
    "${SPCD_OS_ALPINE}")
        SPCD_PM="${SPCD_PM_APK}"
        ;;
    "${SPCD_OS_DEBIAN}" | "${SPCD_OS_UBUNTU}")
        SPCD_PM="${SPCD_PM_APT}"
        ;;
    "${SPCD_OS_ALMA}" | "${SPCD_OS_FEDORA}" | "${SPCD_OS_ROCKY}")
        SPCD_PM="${SPCD_PM_DNF}"
        ;;
    "${SPCD_OS_ARCH}")
        SPCD_PM="${SPCD_PM_PACMAN}"
        ;;
    "${SPCD_OS_OPENSUSE}")
        SPCD_PM="${SPCD_PM_ZYPPER}"
        ;;
    *) ;;
    esac
    spcd_split
    spcd_os_printenv "SPCD_PM"
    # set python alias
    SPCD_PYTHON_ALIAS="python3"
    spcd_split
    spcd_os_printenv "SPCD_PYTHON_ALIAS"
    # set python command & package
    case "${SPCD_OS_ID}" in
    "${SPCD_OS_ALMA}" | "${SPCD_OS_ROCKY}")
        SPCD_PYTHON_COMMAND="python3.12"
        SPCD_PYTHON_PACKAGE="python3.12"
        ;;
    "${SPCD_OS_ALPINE}")
        case "${SPCD_OS_VERSION}" in
        "3.20") SPCD_PYTHON_COMMAND="python3.12" ;;
        "3.19") SPCD_PYTHON_COMMAND="python3.11" ;;
        *) ;;
        esac
        SPCD_PYTHON_PACKAGE="python3"
        ;;
    "${SPCD_OS_ARCH}")
        SPCD_PYTHON_COMMAND="python3.12"
        SPCD_PYTHON_PACKAGE="python"
        ;;
    "${SPCD_OS_DEBIAN}")
        case "${SPCD_OS_VERSION}" in
        "bookworm") SPCD_PYTHON_COMMAND="python3.11" ;;
        "bullseye") SPCD_PYTHON_COMMAND="python3.9" ;;
        *) ;;
        esac
        SPCD_PYTHON_PACKAGE="python3"
        ;;
    "${SPCD_OS_FEDORA}")
        SPCD_PYTHON_COMMAND="python3.12"
        SPCD_PYTHON_PACKAGE="python3"
        ;;
    "${SPCD_OS_OPENSUSE}")
        case "${SPCD_OS_VERSION}" in
        "15.6")
            SPCD_PYTHON_COMMAND="python3.12"
            SPCD_PYTHON_PACKAGE="python312"
            ;;
        "15.5")
            SPCD_PYTHON_COMMAND="python3.11"
            SPCD_PYTHON_PACKAGE="python311"
            ;;
        *) ;;
        esac
        ;;
    "${SPCD_OS_UBUNTU}")
        case "${SPCD_OS_VERSION}" in
        "noble") SPCD_PYTHON_COMMAND="python3.12" ;;
        "jammy") SPCD_PYTHON_COMMAND="python3.10" ;;
        *) ;;
        esac
        SPCD_PYTHON_PACKAGE="python3"
        ;;
    *) ;;
    esac
    spcd_split
    spcd_os_printenv "SPCD_PYTHON_COMMAND" "SPCD_PYTHON_PACKAGE"
    # set python packages
    case "${SPCD_OS_ID}" in
    "${SPCD_OS_ALMA}" | "${SPCD_OS_FEDORA}" | "${SPCD_OS_ROCKY}" | \
        "${SPCD_OS_OPENSUSE}")
        SPCD_PYTHON_PACKAGES="/usr/lib64/${SPCD_PYTHON_COMMAND}/site-packages"
        ;;
    "${SPCD_OS_ALPINE}" | "${SPCD_OS_ARCH}")
        SPCD_PYTHON_PACKAGES="/usr/lib/${SPCD_PYTHON_COMMAND}/site-packages"
        ;;
    "${SPCD_OS_DEBIAN}" | "${SPCD_OS_UBUNTU}")
        SPCD_PYTHON_PACKAGES="/usr/lib/${SPCD_PYTHON_ALIAS}/dist-packages"
        ;;
    *) ;;
    esac
    # set python virtual environment
    SPCD_PYTHON_VENV="/opt/venv"
    SPCD_PYTHON_VENV_BINARIES="${SPCD_PYTHON_VENV}/bin"
    SPCD_PYTHON_VENV_PACKAGES="\
${SPCD_PYTHON_VENV}/lib/${SPCD_PYTHON_COMMAND}/site-packages"
    spcd_split
    spcd_os_printenv "SPCD_PYTHON_PACKAGES" "SPCD_PYTHON_VENV_PACKAGES"
    # downloads
    SPCD_DL="$(mktemp --directory)"
    spcd_split
    spcd_os_printenv "SPCD_DL"
}

spcd_step__environment_list_workspace() {
    spcd_step "List workspace"
    spcd_os_ls "$(realpath .)"
}

# ╭──────────────╮
# │ f = function │
# ╰──────────────╯

spcd_git_clone() {
    if [ -n "${1}" ]; then
        local name path url
        name="$(basename "${1}")"
        path="${SPCD_DL}/${name}"
        url="$(spcd_git_url "${1}")"
        git clone "${url}" "${path}"
        echo "${path}"
    fi
}

spcd_git_url() {
    if [ -n "${1}" ]; then
        case "${1}" in
        http*) echo "${1}" ;;
        */*) echo "${SPCD_PROJECT_ROOT}/${1}" ;;
        *) echo "${SPCD_PROJECT_ROOT}/${SPCD_PROJECT_PATH}/${1}" ;;
        esac
    fi
}

spcd_python_ln() {
    local command="${1}"
    if [ -n "${command}" ]; then
        echo "→ ${SPCD_PYTHON_ALIAS} → ${command}"
        ln -f -s "${command}" \
            "/usr/bin/${SPCD_PYTHON_ALIAS}"
    fi
}

spcd_python_pip() {
    if [ -n "${1}" ]; then
        local name path target
        name="$(basename "${1}")"
        path="$(spcd_git_clone "${1}")"
        path="${path}/${name}"
        target="${SPCD_PYTHON_VENV_PACKAGES}"
        cp --recursive "${path}" "${target}"
        echo "${target}/${name}"
    fi
}

spcd_txt_locale() {
    local action="${1}"
    local chosen="${2}"
    set -- \
        "LANG" \
        "LC_CTYPE" \
        "LC_NUMERIC" \
        "LC_TIME" \
        "LC_COLLATE" \
        "LC_MONETARY" \
        "LC_MESSAGES"
    case "${SPCD_OS_ID}" in
    "${SPCD_OS_ALPINE}") ;;
    *)
        set -- \
            "${@}" \
            "LANGUAGE" \
            "LC_PAPER" \
            "LC_NAME" \
            "LC_ADDRESS" \
            "LC_TELEPHONE" \
            "LC_MEASUREMENT" \
            "LC_IDENTIFICATION"
        ;;
    esac
    local name
    case "${action}" in
    "list")
        if ! locale; then
            for name in "${@}"; do
                spcd_os_printenv "${name}"
            done
        fi
        ;;
    "set")
        spcd_txt_locale "list"
        spcd_split
        local locale long
        if [ -n "${chosen}" ]; then
            locale="${chosen}"
        else
            locale="${_SPCD_TXT_LOCALE_DEFAULT}"
        fi
        long="${locale}.${_SPCD_TXT_CHARSET}"
        for name in "${@}"; do
            if [ "${name}" != "LANGUAGE" ]; then
                export "${name}=${long}"
            else
                export "${name}=$(spcd_txt_locales language "${chosen}")"
            fi
        done
        spcd_split
        spcd_txt_locale "list"
        ;;
    "show")
        local regex
        for name in "${@}"; do
            unset regex
            case "${name}" in
            # LC_CTYPE
            "LC_NUMERIC") regex="^\(decimal\|thousands\|grouping\)" ;;
            "LC_TIME") regex="^\(day\|mon\)" ;;
            # LC_COLLATE
            "LC_MONETARY")
                case "${SPCD_OS_ID}" in
                "${SPCD_OS_ALPINE}") ;;
                *) regex="^\(int_curr\|currency\|mon_\)" ;;
                esac
                ;;
            "LC_MESSAGES") regex="^\(yes\|no\)" ;;
            "LC_PAPER") regex="^\(height\|width\)" ;;
            "LC_NAME") regex="^name_m" ;;
            "LC_ADDRESS") regex="^\(country\|lang\)_name" ;;
            "LC_TELEPHONE") regex="^int_" ;;
            "LC_MEASUREMENT") regex="^measurement=" ;;
            "LC_IDENTIFICATION") regex="^\(language\|territory\|title\)" ;;
            *) ;;
            esac
            spcd_split
            spcd_os_printenv "${name}"
            if [ -n "${regex}" ]; then
                locale --keyword-name "${name}" | grep "${regex}"
            fi
        done
        ;;
    *) ;;
    esac
}

spcd_txt_locales() {
    local action="${1}"
    local chosen="${2}"
    set -- \
        "${SPCD_TXT_LOCALE_ENGLISH}" \
        "${SPCD_TXT_LOCALE_FRENCH}"
    local name
    case "${action}" in
    "install")
        spcd_txt_locales "list"
        spcd_split
        case "${SPCD_PM}" in
        "${SPCD_PM_APK}")
            spcd_f_pm_pkg_install "musl-locales"
            export MUSL_LOCPATH="/usr/share/i18n/locales/musl"
            ;;
        "${SPCD_PM_APT}")
            local text
            for name in "${@}"; do
                text="${text}\
${name}.${_SPCD_TXT_CHARSET} ${_SPCD_TXT_CHARSET}
"
            done
            spcd_os_write "/etc/locale.gen" "${text}"
            spcd_f_pm_pkg_install "locales"
            ;;
        "${SPCD_PM_DNF}")
            local language
            for name in "${@}"; do
                language="$(echo "${name}" | cut -d _ -f 1)"
                spcd_f_pm_pkg_install "glibc-langpack-${language}"
            done
            ;;
        "${SPCD_PM_PACMAN}") spcd_f_pm_pkg_install "glibc-locales" ;;
        "${SPCD_PM_ZYPPER}") spcd_f_pm_pkg_install "glibc-locale" ;;
        *) ;;
        esac
        spcd_split
        spcd_txt_locales "list"
        ;;
    "language")
        local text
        if [ -n "${chosen}" ]; then
            text="${chosen}"
        fi
        for name in "${@}"; do
            if [ "${name}" != "${chosen}" ]; then
                if [ -n "${text}" ]; then
                    text="${text}:${name}"
                else
                    text="${name}"
                fi
            fi
        done
        ;;
    "list")
        if ! spcd_run locale --all-locales; then
            echo "No locales yet!"
        fi
        ;;
    *) ;;
    esac
}

# ╭───┬──────────────────────╮
# │ f │ pm = package manager │
# ╰───┴──────────────────────╯

spcd_f_pm_query() {
    case "${SPCD_PM}" in
    "${SPCD_PM_APK}") apk info "${1}" ;;
    "${SPCD_PM_APT}") dpkg-query --show "${1}" ;;
    "${SPCD_PM_DNF}") rpm --query "${1}" ;;
    "${SPCD_PM_PACMAN}") pacman --query "${1}" ;;
    "${SPCD_PM_ZYPPER}") rpm --query "${1}" ;;
    *) ;;
    esac
}

spcd_f_pm_upgrade() {
    spcd_step "Upgrade"
    case "${SPCD_PM}" in
    "${SPCD_PM_APK}") spcd_run apk upgrade ;;
    "${SPCD_PM_APT}") spcd_run apt-get upgrade --assume-yes ;;
    "${SPCD_PM_DNF}") spcd_run dnf upgrade --assumeyes ;;
    "${SPCD_PM_PACMAN}") spcd_run pacman --sync --sysupgrade --noconfirm ;;
    "${SPCD_PM_ZYPPER}") spcd_run zypper --non-interactive update ;;
    *) ;;
    esac
}

# ╭───┬────┬───────╮
# │ f │ pm │ https │
# ╰───┴────┴───────╯

spcd_f_pm_https_path() {
    case "${SPCD_PM}" in
    "${SPCD_PM_APK}") echo "/etc/apk/repositories.d/https" ;;
    "${SPCD_PM_APT}") echo "/etc/apt/apt.conf.d/https" ;;
    "${SPCD_PM_DNF}") echo "/etc/dnf/dnf.conf.d/https.conf" ;;
    "${SPCD_PM_PACMAN}") echo "/etc/pacman.d/https.conf" ;;
    "${SPCD_PM_ZYPPER}") ;;
    *) ;;
    esac
}

spcd_f_pm_https_trust() {
    spcd_step "Trust"
    local path text
    if [ -n "${SPCD_CA_1}" ] || [ "${SPCD_PM}" = "${SPCD_PM_APT}" ]; then
        path="$(spcd_f_pm_https_path)"
        if [ -n "${path}" ]; then
            spcd_os_mkdir "$(dirname "${path}")"
            case "${SPCD_PM}" in
            "${SPCD_PM_APK}") text="\
--no-verify
" ;;
            "${SPCD_PM_APT}") text="\
Acquire::https::Verify-Peer False;
" ;;
            "${SPCD_PM_DNF}") text="\
sslverify=False
" ;;
            "${SPCD_PM_PACMAN}") text="\
SSLVerify = No
" ;;
            "${SPCD_PM_ZYPPER}") ;;
            *) ;;
            esac
            [ -n "${text}" ] &&
                spcd_os_write "${path}" "${text}"
        fi
    fi
}

spcd_f_pm_https_verify() {
    spcd_step "Verify"
    local path
    path="$(spcd_f_pm_https_path)"
    if [ -n "${path}" ]; then
        spcd_os_rm "${path}"
    fi
}

# ╭───┬────┬─────╮
# │ f │ pm │ pkg │
# ╰───┴────┴─────╯

spcd_f_pm_pkg_clean() {
    case "${SPCD_PM}" in
    "${SPCD_PM_APK}") spcd_run apk cache purge ;;
    "${SPCD_PM_APT}") spcd_run apt-get clean ;;
    "${SPCD_PM_DNF}") spcd_run dnf clean all ;;
    "${SPCD_PM_PACMAN}") spcd_run pacman --sync --clean --noconfirm ;;
    "${SPCD_PM_ZYPPER}") spcd_run zypper clean ;;
    *) ;;
    esac
}

spcd_f_pm_pkg_install() {
    case "${SPCD_PM}" in
    "${SPCD_PM_APK}") spcd_run apk add "${1}" ;;
    "${SPCD_PM_APT}") spcd_run apt-get install --assume-yes "${1}" ;;
    "${SPCD_PM_DNF}") spcd_run dnf install --assumeyes "${1}" ;;
    "${SPCD_PM_PACMAN}") spcd_run pacman --sync --noconfirm "${1}" ;;
    "${SPCD_PM_ZYPPER}") spcd_run zypper --non-interactive install "${1}" ;;
    *) ;;
    esac
    spcd_f_pm_pkg_clean
}

spcd_f_pm_pkg_update() {
    spcd_step "Update"
    case "${SPCD_PM}" in
    "${SPCD_PM_APK}") spcd_run apk update ;;
    "${SPCD_PM_APT}") spcd_run apt-get update ;;
    "${SPCD_PM_DNF}") spcd_run dnf makecache ;;
    "${SPCD_PM_PACMAN}") spcd_run pacman --sync --refresh ;;
    "${SPCD_PM_ZYPPER}") spcd_run zypper refresh ;;
    *) ;;
    esac
}

# ╭───┬─────╮
# │ s │ dns │
# ╰───┴─────╯

spcd_step__dns() {
    spcd_step "DNS"
    spcd_dns "write"
}

# ╭───┬──────────╮
# │ s │ packages │
# ╰───┴──────────╯

spcd_step__packages_set_repositories() {
    spcd_step "Set repositories"
    local file
    case "${SPCD_OS_ID}" in
    "${SPCD_OS_ALMA}")
        case "${SPCD_OS_VERSION}" in
        "9")
            set -- \
                "-appstream" \
                "-baseos" \
                "-crb" \
                "-extras" \
                "-highavailability" \
                "-nfv" \
                "-plus" \
                "-resilientstorage" \
                "-rt" \
                "-sap" \
                "-saphana"
            ;;
        "8")
            set -- \
                "-ha" \
                "-nfv" \
                "-plus" \
                "-powertools" \
                "-resilientstorage" \
                "-rt" \
                "-sap" \
                "-saphana" \
                ""
            ;;
        *) ;;
        esac
        for file in "${@}"; do
            spcd_os_sed "/etc/yum.repos.d/almalinux${file}.repo" \
                "|^mirrorlist|#mirrorlist|" \
                "|https://repo.almalinux.org|${SPCD_URL_ALMA}|" \
                "|^# baseurl|baseurl|"
        done
        ;;
    "${SPCD_OS_ALPINE}")
        spcd_os_write "/etc/apk/repositories" "\
${SPCD_URL_ALPINE}/v${SPCD_OS_VERSION}/main
${SPCD_URL_ALPINE}/v${SPCD_OS_VERSION}/community
"
        ;;
    "${SPCD_OS_ARCH}")
        spcd_os_write "/etc/pacman.d/mirrorlist" "\
Server = ${SPCD_URL_ARCH}/\$repo/os/\$arch
"
        ;;
    "${SPCD_OS_DEBIAN}")
        spcd_os_write "/etc/apt/sources.list" "\
deb ${SPCD_URL_DEBIAN} ${SPCD_OS_VERSION} main
deb ${SPCD_URL_DEBIAN} ${SPCD_OS_VERSION}-backports main
deb ${SPCD_URL_DEBIAN} ${SPCD_OS_VERSION}-updates main
deb ${SPCD_URL_DEBIAN}-security ${SPCD_OS_VERSION}-security main
"
        ;;
    "${SPCD_OS_FEDORA}")
        set -- \
            "-updates-testing" \
            "-updates" \
            ""
        for file in "${@}"; do
            spcd_os_sed "/etc/yum.repos.d/fedora${file}.repo" \
                "|^metalink|#metalink|" "\
|http://download.example/pub/fedora/linux|${SPCD_URL_FEDORA}|" \
                "|^#baseurl|baseurl|"
        done
        spcd_os_sed "/etc/yum.repos.d/fedora-cisco-openh264.repo" \
            "|^enabled=1|enabled=0|"
        ;;
    "${SPCD_OS_OPENSUSE}")
        set -- \
            "backports-debug-update" \
            "backports-update" \
            "debug-non-oss" \
            "debug-update-non-oss" \
            "debug-update" \
            "debug" \
            "non-oss" \
            "oss" \
            "sle-debug-update" \
            "sle-update" \
            "source" \
            "update-non-oss" \
            "update"
        for file in "${@}"; do
            spcd_os_sed "/etc/zypp/repos.d/repo-${file}.repo" \
                "|http://download.opensuse.org|${SPCD_URL_OPENSUSE}|"
        done
        spcd_os_sed "/etc/zypp/repos.d/repo-openh264.repo" \
            "|^enabled=1|enabled=0|"
        ;;
    "${SPCD_OS_ROCKY}")
        case "${SPCD_OS_VERSION}" in
        "9")
            set -- \
                "rocky-addons" \
                "rocky-devel" \
                "rocky-extras" \
                "rocky"
            ;;
        "8")
            # not Rocky-Media
            set -- \
                "Rocky-AppStream" \
                "Rocky-BaseOS" \
                "Rocky-Debuginfo" \
                "Rocky-Devel" \
                "Rocky-Extras" \
                "Rocky-HighAvailability" \
                "Rocky-NFV" \
                "Rocky-Plus" \
                "Rocky-PowerTools" \
                "Rocky-RT" \
                "Rocky-ResilientStorage" \
                "Rocky-Sources"
            ;;
        *) ;;
        esac
        for file in "${@}"; do
            spcd_os_sed "/etc/yum.repos.d/${file}.repo" \
                "|^mirrorlist|#mirrorlist|" \
                "|http://dl.rockylinux.org|${SPCD_URL_ROCKY}|" \
                "|^#baseurl|baseurl|"
        done
        ;;
    "${SPCD_OS_UBUNTU}")
        spcd_os_write "/etc/apt/sources.list" "\
deb ${SPCD_URL_UBUNTU} ${SPCD_OS_VERSION} main universe
deb ${SPCD_URL_UBUNTU} ${SPCD_OS_VERSION}-backports main universe
deb ${SPCD_URL_UBUNTU} ${SPCD_OS_VERSION}-updates main universe
deb ${SPCD_URL_UBUNTU} ${SPCD_OS_VERSION}-security main universe
"
        ;;
    *) ;;
    esac
}

spcd_step__packages_set_configuration() {
    spcd_step "Set configuration"
    case "${SPCD_PM}" in
    "${SPCD_PM_DNF}")
        spcd_os_write "/etc/dnf/dnf.conf" "\
[main]
best=True
clean_requirements_on_remove=True
gpgcheck=1
installonly_limit=3
skip_if_unavailable=False
"
        ;;
    "${SPCD_PM_APK}") ;;
    "${SPCD_PM_PACMAN}") ;;
    "${SPCD_PM_APT}")
        spcd_os_write "/etc/apt/apt.conf.d/apt.conf" "\
Acquire::Check-Valid-Until True;
APT::Get::Show-Versions True;
APT::Install-Recommends False;
APT::Install-Suggests False;
Dir::Etc::SourceParts \"\";
"
        ;;
    "${SPCD_PM_ZYPPER}") ;;
    *) ;;
    esac
    case "${SPCD_OS_ID}" in
    "${SPCD_OS_ARCH}")
        spcd_run pacman-key --init
        ;;
    "${SPCD_OS_DEBIAN}" | "${SPCD_OS_UBUNTU}")
        export DEBIAN_FRONTEND="noninteractive"
        spcd_os_printenv DEBIAN_FRONTEND
        ;;
    *) ;;
    esac
}

spcd_step__packages_install_tools() {
    spcd_step "Install tools"
    case "${SPCD_PM}" in
    "${SPCD_PM_APT}") spcd_f_pm_pkg_install "apt-utils" ;;
    *) ;;
    esac
}

spcd_step__packages_install_locales() {
    spcd_step_in "Locales"
    spcd_step "Install"
    spcd_txt_locales "install"
    spcd_step "Set"
    spcd_txt_locale "set" "${SPCD_TXT_LOCALE}"
    spcd_step "Show"
    spcd_txt_locale "show"
    spcd_step_out
}

# ╭───┬────╮
# │ s │ ca │
# ╰───┴────╯

spcd_step__ca_install_package() {
    spcd_step "Install package"
    spcd_f_pm_pkg_install "ca-certificates"
}

spcd_step__ca_write_certificates() {
    spcd_step "Write certificates"
    local root
    case "${SPCD_OS_ID}" in
    "${SPCD_OS_ALMA}" | "${SPCD_OS_FEDORA}" | "${SPCD_OS_ROCKY}")
        root="/etc/pki/ca-trust/source/anchors"
        ;;
    "${SPCD_OS_ALPINE}" | "${SPCD_OS_DEBIAN}" | "${SPCD_OS_UBUNTU}")
        root="/usr/local/share/ca-certificates"
        ;;
    "${SPCD_OS_ARCH}")
        root="/etc/ca-certificates/trust-source/anchors"
        ;;
    "${SPCD_OS_OPENSUSE}")
        root="/etc/pki/trust/anchors"
        ;;
    *) ;;
    esac
    spcd_os_mkdir "${root}"
    spcd_ca "write" "${root}"
}

spcd_step__ca_update_certificates() {
    spcd_step "Update certificates"
    case "${SPCD_OS_ID}" in
    "${SPCD_OS_ARCH}" | \
        "${SPCD_OS_ALMA}" | \
        "${SPCD_OS_FEDORA}" | \
        "${SPCD_OS_ROCKY}")
        spcd_run update-ca-trust
        ;;
    "${SPCD_OS_ALPINE}" | \
        "${SPCD_OS_DEBIAN}" | \
        "${SPCD_OS_OPENSUSE}" | \
        "${SPCD_OS_UBUNTU}")
        spcd_run update-ca-certificates
        ;;
    *) ;;
    esac
}

# ╭───┬──────────╮
# │ s │ packages │
# ╰───┴──────────╯

spcd_step__packages_install_dos2unix() {
    spcd_step "Install dos2unix"
    spcd_f_pm_pkg_install "dos2unix"
}

spcd_step__packages_install_git() {
    spcd_step "Install Git"
    spcd_f_pm_pkg_install "git"
}

# ╭───┬────────╮
# │ s │ python │
# ╰───┴────────╯

spcd_step__python_install() {
    spcd_step "Install package"
    spcd_f_pm_pkg_install "${SPCD_PYTHON_PACKAGE}"
    spcd_step "Link alias to command"
    spcd_python_ln "${SPCD_PYTHON_COMMAND}"
    # venv
    spcd_step_in "Virtual environment"
    spcd_step "Install package"
    case "${SPCD_OS_ID}" in
    "${SPCD_OS_DEBIAN}" | "${SPCD_OS_UBUNTU}")
        spcd_f_pm_pkg_install "python3-venv"
        ;;
    *) ;;
    esac
    spcd_step "Configure PIP"
    spcd_os_write "/etc/pip.conf" "\
[global]
index-url = ${SPCD_URL_PYTHON}/simple
"
    spcd_step "Create"
    "${SPCD_PYTHON_ALIAS}" -m "venv" "${SPCD_PYTHON_VENV}"
    spcd_step "Activate"
    export PATH="${SPCD_PYTHON_VENV_BINARIES}:${PATH}"
    export VIRTUAL_ENV="${SPCD_PYTHON_VENV}"
    spcd_step_out
}

spcd_step__python_modules() {
    spcd_step_in "Modules"
    local target path script check
    target="${SPCD_PYTHON_VENV_PACKAGES}"
    spcd_step "List"
    spcd_os_ls "${target}"
    spcd_step "Main"
    path="$(spcd_python_pip "${SPCD_GIT_SPCD}")"
    # check matching of file and variable
    spcd_step "Check"
    script="${path}/bootstrap.sh"
    ls -l "${script}"
    check="${script}.${_SPCD_CMD_SUM}"
    "${_SPCD_CMD_SUM}" "${script}" >"${check}"
    printf "%s" "${SPCD}" >"${script}"
    ls -l "${script}"
    dos2unix "${script}"
    ls -l "${script}"
    "${_SPCD_CMD_SUM}" -c "${check}" || spcd_error_ci "SPCD"
    spcd_step "Root"
    spcd_python_pip "${SPCD_GIT_RWX}"
    spcd_step "List"
    spcd_os_ls "${target}"
    spcd_step_out
}

spcd_step__install_packages() {
    spcd_step_in "OS packages"
    local file
    # epel
    spcd_step "EPEL"
    case "${SPCD_OS_ID}" in
    "${SPCD_OS_ALMA}" | "${SPCD_OS_ROCKY}")
        spcd_f_pm_pkg_install "epel-release"
        case "${SPCD_OS_VERSION}" in
        "9")
            set -- \
                "-testing" \
                ""
            ;;
        "8")
            set -- \
                "-modular" \
                "-testing-modular" \
                "-testing" \
                ""
            ;;
        *) ;;
        esac
        for file in "${@}"; do
            spcd_os_sed "/etc/yum.repos.d/epel${file}.repo" \
                "|^metalink|#metalink|" \
                "|https://download.example/pub/epel|${SPCD_URL_EPEL}|" \
                "|^#baseurl|baseurl|"
        done
        file="/etc/yum.repos.d/epel-cisco-openh264.repo"
        if [ -f "${file}" ]; then
            spcd_os_sed "${file}" \
                "|^enabled=1|enabled=0|"
        fi
        ;;
    *) ;;
    esac
    # graphviz
    spcd_step "GraphViz"
    spcd_f_pm_pkg_install "graphviz"
    # openssh
    spcd_step "OpenSSH"
    case "${SPCD_PM}" in
    "${SPCD_PM_APK}" | "${SPCD_PM_APT}")
        spcd_f_pm_pkg_install "openssh-client"
        ;;
    "${SPCD_PM_DNF}" | "${SPCD_PM_ZYPPER}")
        spcd_f_pm_pkg_install "openssh-clients"
        ;;
    "${SPCD_PM_PACMAN}") spcd_f_pm_pkg_install "openssh" ;;
    *) ;;
    esac
    # plantuml
    spcd_step "PlantUML"
    spcd_f_pm_pkg_install "plantuml"
    # rsync
    spcd_step "Rsync"
    spcd_f_pm_pkg_install "rsync"
    # shell check
    spcd_step "ShellCheck"
    case "${SPCD_PM}" in
    "${SPCD_PM_DNF}" | "${SPCD_PM_ZYPPER}")
        spcd_f_pm_pkg_install "ShellCheck"
        ;;
    *) spcd_f_pm_pkg_install "shellcheck" ;;
    esac
    # shfmt
    spcd_step "ShellFormat"
    case "${SPCD_OS_ID}" in
    "${SPCD_OS_ALMA}" | "${SPCD_OS_ROCKY}") ;;
    "${SPCD_OS_DEBIAN}")
        case "${SPCD_OS_VERSION}" in
        "bullseye") ;;
        *) spcd_f_pm_pkg_install "shfmt" ;;
        esac
        ;;
    *) spcd_f_pm_pkg_install "shfmt" ;;
    esac
    spcd_step_out
}

spcd_step__python_write_module() {
    spcd_step "Write module"
    local variable value text index root
    for variable in \
        OS_ID OS_VERSION \
        PROJECT_ROOT PROJECT_PATH PROJECT_NAME \
        PYTHON_VENV_BINARIES PYTHON_VENV_PACKAGES \
        OPEN DOWN VERT SPLT __UP SHUT; do
        value="$(spcd_os_printenv "SPCD_${variable}")"
        text="${text}${value}
"
    done
    index=$((__SPCD_STEP_1_INDEX + 1))
    for root in \
        "${SPCD_PYTHON_PACKAGES}" "${SPCD_PYTHON_VENV_PACKAGES}"; do
        spcd_os_write "${root}/env.py" "${text}
SPCD_STEP = ${index}
"
    done
}

spcd_step__python_switch() {
    spcd_step "Switch"
    local name path
    name="$(basename "${SPCD_GIT_SPCD}")"
    path="$(realpath "${0}")"
    echo "\
${path}
↓
${SPCD_PYTHON_ALIAS} / ${name}"
    "${SPCD_PYTHON_ALIAS}" -m "${name}"
}

# ╭──────╮
# │ main │
# ╰──────╯

spcd_main() {
    # environment
    spcd_step_in "Environment"
    spcd_step_in "Defaults"
    spcd_step "Print defined"
    spcd_step__environment_print
    spcd_step__environment_defaults_set
    spcd_step "Print effective"
    spcd_step__environment_print
    spcd_step_out
    spcd_step__environment_set_variables
    spcd_step__environment_list_workspace
    spcd_step_out
    # dns
    spcd_step__dns
    # packages
    spcd_step_in "Packages"
    spcd_step__packages_set_repositories
    spcd_step__packages_set_configuration
    spcd_f_pm_https_trust
    spcd_f_pm_pkg_update
    spcd_step__packages_install_tools
    spcd_step__packages_install_locales
    spcd_step_out
    # ca
    spcd_step_in "CA"
    spcd_step__ca_install_package
    spcd_step__ca_write_certificates
    spcd_step__ca_update_certificates
    spcd_step_out
    # packages
    spcd_step_in "Packages"
    spcd_f_pm_https_verify
    spcd_f_pm_pkg_update
    spcd_f_pm_upgrade
    spcd_step__packages_install_dos2unix
    spcd_step__packages_install_git
    spcd_step_out
    # python
    spcd_step_in "Python"
    spcd_step__python_install
    spcd_step__python_modules
    spcd_step__install_packages
    spcd_step__python_write_module
    spcd_step__python_switch
}

spcd_main