.. versionchanged: 2016.3.0

    List the packages currently installed as a dict::

        {'<package_name>': '<version>'}

    CLI Example:

    .. code-block:: bash

        salt '*' pkg.list_pkgs

def list_pkgs(versions_as_list=False, **kwargs):
    '''
    .. versionchanged: 2016.3.0

    List the packages currently installed as a dict::

        {'<package_name>': '<version>'}

    CLI Example:

    .. code-block:: bash

        salt '*' pkg.list_pkgs
    '''
    versions_as_list = salt.utils.data.is_true(versions_as_list)
    # not yet implemented or not applicable
    if any([salt.utils.data.is_true(kwargs.get(x))
            for x in ('removed', 'purge_desired')]):
        return {}

    if 'pkg.list_pkgs' in __context__:
        if versions_as_list:
            return __context__['pkg.list_pkgs']
        else:
            ret = copy.deepcopy(__context__['pkg.list_pkgs'])
            __salt__['pkg_resource.stringify'](ret)
            return ret

    pkgin = _check_pkgin()
    ret = {}

    out = __salt__['cmd.run'](
        [pkgin, 'ls'] if pkgin else ['pkg_info'],
        output_loglevel='trace')

    for line in out.splitlines():
        try:
            # Some versions of pkgin check isatty unfortunately
            # this results in cases where a ' ' or ';' can be used
            pkg, ver = re.split('[; ]', line, 1)[0].rsplit('-', 1)
        except ValueError:
            continue
        __salt__['pkg_resource.add_pkg'](ret, pkg, ver)

    __salt__['pkg_resource.sort_pkglist'](ret)
    __context__['pkg.list_pkgs'] = copy.deepcopy(ret)
    if not versions_as_list:
        __salt__['pkg_resource.stringify'](ret)
    return ret