lockfile-info

Info about an npm project - which lockfile version, which lockfile(s) are present, etc.

Example

const lockfileInfo = require('lockfile-info');
const assert = require('assert');

lockfileInfo().then((results) => {
    assert.deepEqual(Object.keys(results), [
        'hasPackageJSON',
        'hasNodeModulesDir',
        'hasLockfile',
        'hasPackageLock',
        'hasShrinkwrap',
        'lockfileVersion',
    ]);

    assert.equal(typeof results.hasPackageJSON, 'boolean');
    assert.equal(typeof results.hasNodeModulesDir, 'boolean');
    assert.equal(typeof results.hasLockfile, 'boolean');
    assert.equal(typeof results.hasPackageLock, 'boolean');
    assert.equal(typeof results.hasShrinkwrap, 'boolean');
    assert.equal(typeof results.lockfileVersion, 'number'); // `NaN`, `1`, `2`, or `3`
});