54 lines
1.2 KiB
JavaScript
54 lines
1.2 KiB
JavaScript
"use strict";
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const createError = require("./parser-create-error");
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function parse(text) {
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const jsx = isProbablyJsx(text);
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let ast;
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try {
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try {
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// Try passing with our best guess first.
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ast = tryParseTypeScript(text, jsx);
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} catch (e) {
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// But if we get it wrong, try the opposite.
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ast = tryParseTypeScript(text, !jsx);
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}
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} catch (e) {
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throw createError(e.message, e.lineNumber, e.column);
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}
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delete ast.tokens;
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return ast;
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}
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function tryParseTypeScript(text, jsx) {
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// While we are working on typescript, we are putting it in devDependencies
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// so it shouldn't be picked up by static analysis
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const parser = require("typescript-eslint-parser");
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return parser.parse(text, {
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loc: true,
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range: true,
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tokens: true,
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comment: true,
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useJSXTextNode: true,
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ecmaFeatures: { jsx }
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});
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}
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/**
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* Use a naive regular expression until we address
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* https://github.com/prettier/prettier/issues/1538
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*/
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function isProbablyJsx(text) {
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return new RegExp(
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[
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"(^[^\"'`]*</)", // Contains "</" when probably not in a string
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"|",
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"(^[^/]{2}.*\/>)" // Contains "/>" on line not starting with "//"
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].join(""),
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"m"
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).test(text);
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}
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module.exports = parse;
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