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Viewing file:     parser-service.js (1.99 KB)      -rw-r--r--

/**
 * @fileoverview ESLint Parser
 * @author Nicholas C. Zakas
 */
/* eslint class-methods-use-this: off -- Anticipate future constructor arguments. */

"use strict";

//-----------------------------------------------------------------------------
// Types
//-----------------------------------------------------------------------------

/** @typedef {import("../linter/vfile.js").VFile} VFile */
/** @typedef {import("@eslint/core").Language} Language */
/** @typedef {import("@eslint/core").LanguageOptions} LanguageOptions */

//-----------------------------------------------------------------------------
// Exports
//-----------------------------------------------------------------------------

/**
 * The parser for ESLint.
 */
class ParserService {

    /**
     * Parses the given file synchronously.
     * @param {VFile} file The file to parse.
     * @param {{language:Language,languageOptions:LanguageOptions}} config The configuration to use.
     * @returns {Object} An object with the parsed source code or errors.
     * @throws {Error} If the parser returns a promise.
     */
    parseSync(file, config) {

        const { language, languageOptions } = config;
        const result = language.parse(file, { languageOptions });

        if (typeof result.then === "function") {
            throw new Error("Unsupported: Language parser returned a promise.");
        }

        if (result.ok) {
            return {
                ok: true,
                sourceCode: language.createSourceCode(file, result, { languageOptions })
            };
        }

        // if we made it to here there was an error
        return {
            ok: false,
            errors: result.errors.map(error => ({
                ruleId: null,
                nodeType: null,
                fatal: true,
                severity: 2,
                message: `Parsing error: ${error.message}`,
                line: error.line,
                column: error.column
            }))
        };
    }
}

module.exports = { ParserService };