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#! /bin/sh

# Library for dtf tests.

# dtf_skip [REASON]
# -----------------
dtf_skip ()
{
    test -n "$1" && echo >&2 "SKIP: $1"
    exit 77
}


dtf_fail ()
{
    test -n "$1" && echo >&2 "$1"
    test -z "$dtf_fail_hooks" && exit 1

    echo >& "running dtf_fail hooks $dtf_fail_hooks"
    for _i_hook in $dtf_fail_hooks
    do
      $_i_hook
    done

    exit 1
}


dtf_debug ()
{
    for _d_i in $1
    do
        case " $DTF_DBG_KEYWORDS " in
            *\ $_d_i\ *)
                shift
                echo >&4 " ~ $*"
                return 0
            ;;
        esac
    done
}


__dtf_debug ()
{
    dtf_debug dtf_lib "$*"
}

__dtf_method_not_implemented ()
{
    dtf_fail "'$1' method is not implemented"
}


# dtf_pkg_installed PKGNAME
# -------------------------
dtf_pkg_installed ()
{
    __dtf_debug "checking whether '$1' is installed"
# {% if config.os.id in ["fedora", "rhel", "centos"] %}
    rpm -q "$1" &>/dev/null
# {% else %}
    __dtf_method_not_implemented "dtf_pkg_installed"
# {% endif %}
}


__dtf_assert_nargs ()
{
    _d_nargs=$1 ; shift
    _d_method=$1 ; shift

    test $# -ge "$_d_nargs" && return

    _d_tr="$# given ($*)"
    if test "$_d_nargs" -eq 1; then
      dtf_fail "method '$_d_method' requires at least 1 argument, $_d_tr"
    else
      dtf_fail "method '$_d_method' requires at least $_d_nargs arguments, $_d_tr"
    fi
}


dtf_is_root ()
{
    _d_uid=`id -u`
    test x"$_d_uid" = x0
}


dtf_assert ()
{
    __dtf_assert_nargs 1 'dtf_pkg_install' ${1+"$@"}

    case $1 in
      root|ROOT)
        dtf_is_root || dtf_fail "root accout required"
        ;;
      cmd)
        shift
        __dtf_assert_cmd "$@"
        ;;
      *)
        dtf_fail "dtf_assert '$1' not implemented"
        ;;
    esac
}


dtf_pkg ()
{
    __dtf_assert_nargs 2 'dtf_pkg' ${1+"$@"}
    _d_action=$1 ; shift
    _d_pkg=$1 ; shift

    dtf_assert root

    case $_d_action in
      remove)
        # {{ "\n    " + commands.pkginstaller.remove(['"$_d_pkg"'], {'docs': True}) }}
        ;;
      install)
        # {{ "\n    " + commands.pkginstaller.install(['"$_d_pkg"'], {'docs': True}) }}
        ;;
      *)
        dtf_fail "dtf_pkg: unimplemented action '$_d_action'"
        ;;
    esac
}


dtf_pkg_install ()
{
    __dtf_assert_nargs 1 'dtf_pkg_install' ${1+"$@"}
    dtf_pkg install "$1"
    test $? -eq 0 || dtf_fail "can't install '$1' package"
}


dtf_pkg_remove ()
{
    __dtf_assert_nargs 1 'dtf_pkg_remove' ${1+"$@"}
    dtf_pkg remove "$1"
    test $? -eq 0 || dtf_fail "can't remove '$1' package"
}


__dtf_prereq_pkg ()
{
    __dtf_assert_nargs 2 'dtf_prereq pkg' ${1+"$@"}

    _d_subaction=$1 ; shift
    _d_pkg=$1 ; shift

    __dtf_debug "making sure $_d_pkg is $_d_subaction"

    case $_d_subaction in
      installed)
        dtf_pkg_installed "$_d_pkg" && return 0
        dtf_pkg_install "$_d_pkg"
        ;;
      missing)
        dtf_pkg_installed "$_d_pkg" || return 0
        dtf_pkg_remove "$_d_pkg"
        ;;
      *)
        dtf_fail "dtf_prereq pkg: not implemented action $_d_subaction"
        ;;
    esac
}


__dtf_cmd ()
{
    __dtf_debug "running $1"

    _d_cmd=$1 ; shift
    eval "$_d_cmd"
    __dtf_cmd_result_status=$?
}


__dtf_assert_cmd ()
{
    _d_a_cmd=$1         ; shift
    _d_ok_statuses=$1   ; shift
    __dtf_cmd "$_d_a_cmd"

    case " $_d_ok_statuses " in
      *"$__dtf_cmd_result_status "*)
        ;;
      *)
        _d_f_msg="cmd '$_d_a_cmd' ended with '$__dtf_cmd_result_status' while "
        _d_f_msg="$_d_f_msg it should end with one of { $_d_ok_statuses }"
        dtf_fail "$_d_f_msg"
        ;;
    esac
}


# dtf_prereq REQUIREMENT [ARGS..]
# -------------------------------
# Make sure the requirement is met or fail.
dtf_prereq ()
{
    __dtf_assert_nargs 1 dtf_prereq ${1+"$@"}

    _d_requirement=$1 ; shift

    case $_d_requirement in
      pkg)
        __dtf_prereq_pkg "$@"
        ;;
      *)
        dtf_fail "dtf_prereq: action '$_d_requirement' not implemented"
        ;;
    esac
}