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irreligious/node_modules/eslint/lib/init/source-code-utils.js

109 lines
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JavaScript

/**
* @fileoverview Tools for obtaining SourceCode objects.
* @author Ian VanSchooten
*/
"use strict";
//------------------------------------------------------------------------------
// Requirements
//------------------------------------------------------------------------------
const { CLIEngine } = require("../cli-engine");
/*
* This is used for:
*
* 1. Enumerate target file because we have not expose such a API on `CLIEngine`
* (https://github.com/eslint/eslint/issues/11222).
* 2. Create `SourceCode` instances. Because we don't have any function which
* instantiate `SourceCode` so it needs to take the created `SourceCode`
* instance out after linting.
*
* TODO1: Expose the API that enumerates target files.
* TODO2: Extract the creation logic of `SourceCode` from `Linter` class.
*/
const { getCLIEngineInternalSlots } = require("../cli-engine/cli-engine"); // eslint-disable-line node/no-restricted-require
const debug = require("debug")("eslint:source-code-utils");
//------------------------------------------------------------------------------
// Helpers
//------------------------------------------------------------------------------
/**
* Get the SourceCode object for a single file
* @param {string} filename The fully resolved filename to get SourceCode from.
* @param {Object} engine A CLIEngine.
* @returns {Array} Array of the SourceCode object representing the file
* and fatal error message.
*/
function getSourceCodeOfFile(filename, engine) {
debug("getting sourceCode of", filename);
const results = engine.executeOnFiles([filename]);
if (results && results.results[0] && results.results[0].messages[0] && results.results[0].messages[0].fatal) {
const msg = results.results[0].messages[0];
throw new Error(`(${filename}:${msg.line}:${msg.column}) ${msg.message}`);
}
// TODO: extract the logic that creates source code objects to `SourceCode#parse(text, options)` or something like.
const { linter } = getCLIEngineInternalSlots(engine);
const sourceCode = linter.getSourceCode();
return sourceCode;
}
//------------------------------------------------------------------------------
// Public Interface
//------------------------------------------------------------------------------
/**
* This callback is used to measure execution status in a progress bar
* @callback progressCallback
* @param {number} The total number of times the callback will be called.
*/
/**
* Gets the SourceCode of a single file, or set of files.
* @param {string[]|string} patterns A filename, directory name, or glob, or an array of them
* @param {Object} options A CLIEngine options object. If not provided, the default cli options will be used.
* @param {progressCallback} callback Callback for reporting execution status
* @returns {Object} The SourceCode of all processed files.
*/
function getSourceCodeOfFiles(patterns, options, callback) {
const sourceCodes = {};
const globPatternsList = typeof patterns === "string" ? [patterns] : patterns;
const engine = new CLIEngine({ ...options, rules: {} });
// TODO: make file iteration as a public API and use it.
const { fileEnumerator } = getCLIEngineInternalSlots(engine);
const filenames =
Array.from(fileEnumerator.iterateFiles(globPatternsList))
.filter(entry => !entry.ignored)
.map(entry => entry.filePath);
if (filenames.length === 0) {
debug(`Did not find any files matching pattern(s): ${globPatternsList}`);
}
filenames.forEach(filename => {
const sourceCode = getSourceCodeOfFile(filename, engine);
if (sourceCode) {
debug("got sourceCode of", filename);
sourceCodes[filename] = sourceCode;
}
if (callback) {
callback(filenames.length); // eslint-disable-line node/callback-return
}
});
return sourceCodes;
}
module.exports = {
getSourceCodeOfFiles
};