101 lines
3 KiB
JavaScript
101 lines
3 KiB
JavaScript
import {removeSpecifier} from './fix/index.js';
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import assertToken from './utils/assert-token.js';
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const MESSAGE_ID = 'no-named-default';
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const messages = {
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[MESSAGE_ID]: 'Prefer using the default {{type}} over named {{type}}.',
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};
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const isValueImport = node => !node.importKind || node.importKind === 'value';
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const isValueExport = node => !node.exportKind || node.exportKind === 'value';
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const fixImportSpecifier = (importSpecifier, context) => function * (fixer) {
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const {sourceCode} = context;
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const declaration = importSpecifier.parent;
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yield removeSpecifier(importSpecifier, fixer, context, /* keepDeclaration */ true);
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const nameText = sourceCode.getText(importSpecifier.local);
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const hasDefaultImport = declaration.specifiers.some(({type}) => type === 'ImportDefaultSpecifier');
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// Insert a new `ImportDeclaration`
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if (hasDefaultImport) {
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const fromToken = sourceCode.getTokenBefore(declaration.source, token => token.type === 'Identifier' && token.value === 'from');
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const [startOfFromToken] = sourceCode.getRange(fromToken);
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const [, endOfDeclaration] = sourceCode.getRange(declaration);
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const text = `import ${nameText} ${sourceCode.text.slice(startOfFromToken, endOfDeclaration)}`;
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yield fixer.insertTextBefore(declaration, `${text}\n`);
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return;
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}
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const importToken = sourceCode.getFirstToken(declaration);
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assertToken(importToken, {
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expected: {type: 'Keyword', value: 'import'},
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ruleId: 'no-named-default',
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});
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const shouldAddComma = declaration.specifiers.some(specifier => specifier !== importSpecifier && specifier.type === importSpecifier.type);
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yield fixer.insertTextAfter(importToken, ` ${nameText}${shouldAddComma ? ',' : ''}`);
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};
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const fixExportSpecifier = (exportSpecifier, context) => function * (fixer) {
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const declaration = exportSpecifier.parent;
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yield removeSpecifier(exportSpecifier, fixer, context);
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const text = `export default ${context.sourceCode.getText(exportSpecifier.local)};`;
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yield fixer.insertTextBefore(declaration, `${text}\n`);
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};
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/** @param {import('eslint').Rule.RuleContext} context */
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const create = context => ({
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ImportSpecifier(specifier) {
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if (!(
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isValueImport(specifier)
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&& specifier.imported.name === 'default'
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&& isValueImport(specifier.parent)
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)) {
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return;
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}
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return {
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node: specifier,
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messageId: MESSAGE_ID,
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data: {type: 'import'},
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fix: fixImportSpecifier(specifier, context),
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};
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},
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ExportSpecifier(specifier) {
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if (!(
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isValueExport(specifier)
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&& specifier.exported.name === 'default'
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&& isValueExport(specifier.parent)
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&& !specifier.parent.source
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)) {
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return;
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}
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return {
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node: specifier,
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messageId: MESSAGE_ID,
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data: {type: 'export'},
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fix: fixExportSpecifier(specifier, context),
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};
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},
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});
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/** @type {import('eslint').Rule.RuleModule} */
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const config = {
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create,
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meta: {
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type: 'suggestion',
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docs: {
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description: 'Disallow named usage of default import and export.',
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recommended: 'unopinionated',
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},
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fixable: 'code',
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messages,
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},
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};
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export default config;
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