how to use it?

[a-x-]

my not working setup is:

'use strict';
const bemFind = require('bem-tools-find');
// find all client js (not bemhtml.js, priv.js and etc.)
bemFind({
    techs: ['js'],
}).pipe(process.stdout);

also i have two equal config files: .bemhint.js and .bemrc:

module.exports = {
    levels: [
        '*blocks'
    ],

    excludePaths: [
        'node_modules/**',
        'libs/**'
    ],

    plugins: {
        'bemhint-plugins/plugins/i-bem-html': true,
        'bemhint-plugins/plugins/i-bem': {
            excludePaths: [
                'common.blocks/b-page/*',
                'common.blocks/i-bem/__internal/*',
                'common.blocks/i-request/_type/*',
                'desktop.blocks/i-clipboard/__zeroclipboard/*'
            ]
        },
        'bemhint-plugins/plugins/i-bem__dom': {
            excludePaths: [
                'common.blocks/b-page/*'
            ]
        },
        'bemhint-plugins/plugins/i-bem__html': {
            excludePaths: [
              'common.blocks/i-bem/__i18n/_dummy/*'
            ]
        },
        'bemhint-plugins/plugins/i-bem__i18n': true,
        'bemhint-plugins/plugins/i-bem__internal': true
    }
};

error:

/Users/invntrm/lego/islands/node_modules/bem-tools-find/lib/util.js:60
        return config.levels || ['.'];
                     ^

TypeError: Cannot read property 'levels' of undefined
    at Object.getLevels (/Users/invntrm/lego/islands/node_modules/bem-tools-find/lib/util.js:60:22)
    at module.exports (/Users/invntrm/lego/islands/node_modules/bem-tools-find/lib/find.js:12:27)
    at Object.<anonymous> (/Users/invntrm/lego/islands/i18n-deps.js:19:1)
    at Module._compile (module.js:413:34)
    at Object.Module._extensions..js (module.js:422:10)
    at Module.load (module.js:357:32)
    at Function.Module._load (module.js:314:12)
    at Function.Module.runMain (module.js:447:10)
    at startup (node.js:148:18)
    at node.js:405:3

WAIDW?

Also, i looked in sources and my emotion is How it able to work? 😄