babel-plugin-danger-remove-unused-import/lib/index.js

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'use strict';

var _slicedToArray = function () { function sliceIterator(arr, i) { var _arr = []; var _n = true; var _d = false; var _e = undefined; try { for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i["return"]) _i["return"](); } finally { if (_d) throw _e; } } return _arr; } return function (arr, i) { if (Array.isArray(arr)) { return arr; } else if (Symbol.iterator in Object(arr)) { return sliceIterator(arr, i); } else { throw new TypeError("Invalid attempt to destructure non-iterable instance"); } }; }();

/**
 * @file: index
 * @author: Cuttle Cong
 * @date: 2017/11/29
 * @description:
 */
var match = require('./utils/matchRule');

module.exports = function (babel) {
  var t = babel.types;
  return {
    visitor: {
      Program: {
        enter: function enter(path) {
          var _ref = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {},
              opts = _ref.opts;

          var _iteratorNormalCompletion = true;
          var _didIteratorError = false;
          var _iteratorError = undefined;

          try {
            for (var _iterator = Object.entries(path.scope.bindings)[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true) {
              var _step$value = _slicedToArray(_step.value, 2),
                  name = _step$value[0],
                  binding = _step$value[1];

              if (binding.kind === 'module') {
                if (!binding.referenced) {
                  var source = binding.path.parentPath.get('source');
                  if (t.isStringLiteral(source) && (!opts.ignore || !match(opts.ignore, source.node.value))) {
                    if (binding.path.node.type === 'ImportSpecifier') {
                      binding.path.remove();
                    } else if (binding.path.parentPath) {
                      binding.path.parentPath.remove();
                    }
                  }
                }
              }
            }
          } catch (err) {
            _didIteratorError = true;
            _iteratorError = err;
          } finally {
            try {
              if (!_iteratorNormalCompletion && _iterator.return) {
                _iterator.return();
              }
            } finally {
              if (_didIteratorError) {
                throw _iteratorError;
              }
            }
          }
        }
      }
    }
  };
};