bigint-crypto-utils/node_modules/eslint-plugin-import/lib/rules/prefer-default-export.js

'use strict';

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

var _docsUrl2 = _interopRequireDefault(_docsUrl);

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

module.exports = {
  meta: {
    type: 'suggestion',
    docs: {
      url: (0, _docsUrl2.default)('prefer-default-export')
    }
  },

  create: function (context) {
    let specifierExportCount = 0;
    let hasDefaultExport = false;
    let hasStarExport = false;
    let namedExportNode = null;

    function captureDeclaration(identifierOrPattern) {
      if (identifierOrPattern.type === 'ObjectPattern') {
        // recursively capture
        identifierOrPattern.properties.forEach(function (property) {
          captureDeclaration(property.value);
        });
      } else {
        // assume it's a single standard identifier
        specifierExportCount++;
      }
    }

    return {
      'ExportDefaultSpecifier': function () {
        hasDefaultExport = true;
      },

      'ExportSpecifier': function (node) {
        if (node.exported.name === 'default') {
          hasDefaultExport = true;
        } else {
          specifierExportCount++;
          namedExportNode = node;
        }
      },

      'ExportNamedDeclaration': function (node) {
        // if there are specifiers, node.declaration should be null
        if (!node.declaration) return;

        // don't warn on single type aliases, declarations, or interfaces
        if (node.exportKind === 'type') return;

        const type = node.declaration.type;


        if (type === 'TSTypeAliasDeclaration' || type === 'TypeAlias' || type === 'TSInterfaceDeclaration' || type === 'InterfaceDeclaration') {
          return;
        }

        if (node.declaration.declarations) {
          node.declaration.declarations.forEach(function (declaration) {
            captureDeclaration(declaration.id);
          });
        } else {
          // captures 'export function foo() {}' syntax
          specifierExportCount++;
        }

        namedExportNode = node;
      },

      'ExportDefaultDeclaration': function () {
        hasDefaultExport = true;
      },

      'ExportAllDeclaration': function () {
        hasStarExport = true;
      },

      'Program:exit': function () {
        if (specifierExportCount === 1 && !hasDefaultExport && !hasStarExport) {
          context.report(namedExportNode, 'Prefer default export.');
        }
      }
    };
  }
};
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