| 1 | 'use strict';var _builder = require('../exportMap/builder');var _builder2 = _interopRequireDefault(_builder);
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| 2 | var _importDeclaration = require('../importDeclaration');var _importDeclaration2 = _interopRequireDefault(_importDeclaration);
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| 3 | var _docsUrl = require('../docsUrl');var _docsUrl2 = _interopRequireDefault(_docsUrl);function _interopRequireDefault(obj) {return obj && obj.__esModule ? obj : { 'default': obj };}
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| 4 |
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| 5 | module.exports = {
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| 6 | meta: {
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| 7 | type: 'problem',
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| 8 | docs: {
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| 9 | category: 'Helpful warnings',
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| 10 | description: 'Forbid use of exported name as identifier of default export.',
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| 11 | url: (0, _docsUrl2['default'])('no-named-as-default') },
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| 12 |
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| 13 | schema: [] },
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| 14 |
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| 15 |
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| 16 | create: function () {function create(context) {
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| 17 | function checkDefault(nameKey, defaultSpecifier) {
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| 18 | /**
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| 19 | * For ImportDefaultSpecifier we're interested in the "local" name (`foo` for `import {bar as foo} ...`)
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| 20 | * For ExportDefaultSpecifier we're interested in the "exported" name (`foo` for `export {bar as foo} ...`)
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| 21 | */
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| 22 | var analyzedName = defaultSpecifier[nameKey].name;
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| 23 |
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| 24 | // #566: default is a valid specifier
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| 25 | if (analyzedName === 'default') {return;}
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| 26 |
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| 27 | var declaration = (0, _importDeclaration2['default'])(context, defaultSpecifier);
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| 28 | /** @type {import('../exportMap').default | null} */
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| 29 | var importedModule = _builder2['default'].get(declaration.source.value, context);
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| 30 | if (importedModule == null) {return;}
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| 31 |
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| 32 | if (importedModule.errors.length > 0) {
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| 33 | importedModule.reportErrors(context, declaration);
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| 34 | return;
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| 35 | }
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| 36 |
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| 37 | if (!importedModule.hasDefault) {
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| 38 | // The rule is triggered for default imports/exports, so if the imported module has no default
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| 39 | // this means we're dealing with incorrect source code anyway
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| 40 | return;
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| 41 | }
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| 42 |
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| 43 | if (!importedModule.has(analyzedName)) {
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| 44 | // The name used locally for the default import was not even used in the imported module.
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| 45 | return;
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| 46 | }
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| 47 |
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| 48 | /**
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| 49 | * FIXME: We can verify if a default and a named export are pointing to the same symbol only
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| 50 | * if they are both `reexports`. In case one of the symbols is not a re-export, but defined
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| 51 | * in the file, the ExportMap structure has no info about what actually is being exported --
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| 52 | * the value in the `namespace` Map is an empty object.
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| 53 | *
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| 54 | * To solve this, it would require not relying on the ExportMap, but on some other way of
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| 55 | * accessing the imported module and its exported values.
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| 56 | *
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| 57 | * Additionally, although `ExportMap.get` is a unified way to get info from both `reexports`
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| 58 | * and `namespace` maps, it does not return valid output we need here, and I think this is
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| 59 | * related to the "cycle safeguards" in the `get` function.
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| 60 | */
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| 61 |
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| 62 | if (importedModule.reexports.has(analyzedName) && importedModule.reexports.has('default')) {
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| 63 | var thingImportedWithNamedImport = importedModule.reexports.get(analyzedName).getImport();
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| 64 | var thingImportedWithDefaultImport = importedModule.reexports.get('default').getImport();
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| 65 |
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| 66 | // Case: both imports point to the same file and they both refer to the same symbol in this file.
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| 67 | if (
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| 68 | thingImportedWithNamedImport.path === thingImportedWithDefaultImport.path &&
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| 69 | thingImportedWithNamedImport.local === thingImportedWithDefaultImport.local)
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| 70 | {
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| 71 | // #1594: the imported module exports the same thing via a default export and a named export
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| 72 | return;
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| 73 | }
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| 74 | }
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| 75 |
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| 76 | context.report(
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| 77 | defaultSpecifier, 'Using exported name \'' + String(
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| 78 | defaultSpecifier[nameKey].name) + '\' as identifier for default ' + (nameKey === 'local' ? 'import' : 'export') + '.');
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| 79 |
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| 80 |
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| 81 | }
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| 82 |
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| 83 | return {
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| 84 | ImportDefaultSpecifier: checkDefault.bind(null, 'local'),
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| 85 | ExportDefaultSpecifier: checkDefault.bind(null, 'exported') };
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| 86 |
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| 87 | }return create;}() };
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| 88 | //# 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