eslint-plugin-import/lib/rules/no-mutable-exports.js

'use strict';

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

var _docsUrl2 = _interopRequireDefault(_docsUrl);

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

module.exports = {
  meta: {
    docs: {
      url: (0, _docsUrl2.default)('no-mutable-exports')
    }
  },

  create: function (context) {
    function checkDeclaration(node) {
      const kind = node.kind;

      if (kind === 'var' || kind === 'let') {
        context.report(node, `Exporting mutable '${kind}' binding, use 'const' instead.`);
      }
    }

    function checkDeclarationsInScope(_ref, name) {
      let variables = _ref.variables;

      for (let variable of variables) {
        if (variable.name === name) {
          for (let def of variable.defs) {
            if (def.type === 'Variable' && def.parent) {
              checkDeclaration(def.parent);
            }
          }
        }
      }
    }

    function handleExportDefault(node) {
      const scope = context.getScope();

      if (node.declaration.name) {
        checkDeclarationsInScope(scope, node.declaration.name);
      }
    }

    function handleExportNamed(node) {
      const scope = context.getScope();

      if (node.declaration) {
        checkDeclaration(node.declaration);
      } else if (!node.source) {
        for (let specifier of node.specifiers) {
          checkDeclarationsInScope(scope, specifier.local.name);
        }
      }
    }

    return {
      'ExportDefaultDeclaration': handleExportDefault,
      'ExportNamedDeclaration': handleExportNamed
    };
  }
};
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