no-unassigned-import.js

'use strict';

var _path = require('path');

var _path2 = _interopRequireDefault(_path);

var _minimatch = require('minimatch');

var _minimatch2 = _interopRequireDefault(_minimatch);

var _staticRequire = require('../core/staticRequire');

var _staticRequire2 = _interopRequireDefault(_staticRequire);

var _docsUrl = require('../docsUrl');

var _docsUrl2 = _interopRequireDefault(_docsUrl);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function report(context, node) {
  context.report({
    node,
    message: 'Imported module should be assigned'
  });
}

function testIsAllow(globs, filename, source) {
  if (!Array.isArray(globs)) {
    return false; // default doesn't allow any patterns
  }

  let filePath;

  if (source[0] !== '.' && source[0] !== '/') {
    // a node module
    filePath = source;
  } else {
    filePath = _path2.default.resolve(_path2.default.dirname(filename), source); // get source absolute path
  }

  return globs.find(glob => (0, _minimatch2.default)(filePath, glob) || (0, _minimatch2.default)(filePath, _path2.default.join(process.cwd(), glob))) !== undefined;
}

function create(context) {
  const options = context.options[0] || {};
  const filename = context.getFilename();
  const isAllow = source => testIsAllow(options.allow, filename, source);

  return {
    ImportDeclaration(node) {
      if (node.specifiers.length === 0 && !isAllow(node.source.value)) {
        report(context, node);
      }
    },
    ExpressionStatement(node) {
      if (node.expression.type === 'CallExpression' && (0, _staticRequire2.default)(node.expression) && !isAllow(node.expression.arguments[0].value)) {
        report(context, node.expression);
      }
    }
  };
}

module.exports = {
  create,
  meta: {
    type: 'suggestion',
    docs: {
      url: (0, _docsUrl2.default)('no-unassigned-import')
    },
    schema: [{
      'type': 'object',
      'properties': {
        'devDependencies': { 'type': ['boolean', 'array'] },
        'optionalDependencies': { 'type': ['boolean', 'array'] },
        'peerDependencies': { 'type': ['boolean', 'array'] },
        'allow': {
          'type': 'array',
          'items': {
            'type': 'string'
          }
        }
      },
      'additionalProperties': false
    }]
  }
};
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