47 lines
2.7 KiB
JavaScript
47 lines
2.7 KiB
JavaScript
import { parseIdentifier } from './partParsers.js';
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import { addError, getPosition, stripComments } from './utils.js';
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/**
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* Adds error of parsing `module.exports = ...`/`(module.)exports.foo = ...` statement.
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*/
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export const onCommonJsExportError = (importsExports, source, { start, end, token }) => addError(importsExports, `Cannot find end (equal sign) of \`${token[0] === 'm' ? 'module.' : ''}exports${source[end] === '.' ? '.' : ''}... = ...\` statement`, start, end);
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/**
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* Parses `module.exports = ...`/`(module.)exports.foo = ...` statement.
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*/
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export const onCommonJsExportParse = (importsExports, source, { start, end: unparsedStart, comments, token }, { start: unparsedEnd, end }) => {
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var unparsed = stripComments(source, unparsedStart, unparsedEnd, comments).trim();
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const startsWithModule = token[0] === 'm';
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if (unparsed[0] === '.') {
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unparsed = unparsed.slice(1).trim();
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const nameIndex = parseIdentifier(unparsed);
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if (nameIndex === 0) {
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return addError(importsExports, `Cannot parse identifier of \`${token}.... = ...\` statement`, start, end);
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}
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const name = unparsed.slice(0, nameIndex);
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let { commonJsExports } = importsExports;
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if (commonJsExports === undefined) {
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importsExports.commonJsExports = commonJsExports = { __proto__: null };
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}
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else if (name in commonJsExports) {
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const firstExport = commonJsExports[name];
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let isTranspilerExport = false;
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if (startsWithModule === false && firstExport.startsWithModule === undefined) {
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const firstExportEnd = firstExport.end;
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const afterFirstExport = source.slice(firstExportEnd, firstExportEnd + 9);
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isTranspilerExport = afterFirstExport === ' exports.' || afterFirstExport === ' void 0;\n';
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}
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if (isTranspilerExport === false) {
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return addError(importsExports, `Duplicate exported name \`${name}\` in \`${token}.... = ...\` statement`, start, end);
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}
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}
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const position = getPosition(importsExports, start, end);
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commonJsExports[name] = startsWithModule ? { ...position, startsWithModule } : position;
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return;
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}
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if (startsWithModule === false) {
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return addError(importsExports, `\`${token} = ...\` is not valid CommonJS namespace export (use \`module.exports = ...\` instead)`, start, end);
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}
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if (importsExports.commonJsNamespaceExport !== undefined) {
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return addError(importsExports, `Duplicate CommonJS namespace export (\`${token} = ...\`)`, start, end);
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}
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importsExports.commonJsNamespaceExport = getPosition(importsExports, start, end);
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};
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