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/**
* @fileoverview ESLint Processor Service
* @author Nicholas C. Zakas
*/
/* eslint class-methods-use-this: off -- Anticipate future constructor arguments. */
"use strict";
//-----------------------------------------------------------------------------
// Requirements
//-----------------------------------------------------------------------------
const path = require("node:path");
const { VFile } = require("../linter/vfile.js");
//-----------------------------------------------------------------------------
// Types
//-----------------------------------------------------------------------------
/** @typedef {import("../shared/types.js").LintMessage} LintMessage */
/** @typedef {import("../linter/vfile.js").VFile} VFile */
/** @typedef {import("@eslint/core").Language} Language */
/** @typedef {import("@eslint/core").LanguageOptions} LanguageOptions */
/** @typedef {import("eslint").Linter.Processor} Processor */
//-----------------------------------------------------------------------------
// Exports
//-----------------------------------------------------------------------------
/**
* The service that applies processors to files.
*/
class ProcessorService {
/**
* Preprocesses the given file synchronously.
* @param {VFile} file The file to preprocess.
* @param {{processor:Processor}} config The configuration to use.
* @returns {{ok:boolean, files?: Array<VFile>, errors?: Array<LintMessage>}} An array of preprocessed files or errors.
* @throws {Error} If the preprocessor returns a promise.
*/
preprocessSync(file, config) {
const { processor } = config;
let blocks;
try {
blocks = processor.preprocess(file.rawBody, file.path);
} catch (ex) {
// If the message includes a leading line number, strip it:
const message = `Preprocessing error: ${ex.message.replace(/^line \d+:/iu, "").trim()}`;
return {
ok: false,
errors: [
{
ruleId: null,
fatal: true,
severity: 2,
message,
line: ex.lineNumber,
column: ex.column,
nodeType: null
}
]
};
}
if (typeof blocks.then === "function") {
throw new Error("Unsupported: Preprocessor returned a promise.");
}
return {
ok: true,
files: blocks.map((block, i) => {
// Legacy behavior: return the block as a string
if (typeof block === "string") {
return block;
}
const filePath = path.join(file.path, `${i}_${block.filename}`);
return new VFile(filePath, block.text, {
physicalPath: file.physicalPath
});
})
};
}
/**
* Postprocesses the given messages synchronously.
* @param {VFile} file The file to postprocess.
* @param {LintMessage[][]} messages The messages to postprocess.
* @param {{processor:Processor}} config The configuration to use.
* @returns {LintMessage[]} The postprocessed messages.
*/
postprocessSync(file, messages, config) {
const { processor } = config;
return processor.postprocess(messages, file.path);
}
}
module.exports = { ProcessorService };