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node_modules/eslint/lib/util/source-code-util.js 3.9 KB
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  /**
   * @fileoverview Tools for obtaining SourceCode objects.
   * @author Ian VanSchooten
   */
  
  "use strict";
  
  //------------------------------------------------------------------------------
  // Requirements
  //------------------------------------------------------------------------------
  
  const CLIEngine = require("../cli-engine"),
      globUtil = require("./glob-util"),
      baseDefaultOptions = require("../../conf/default-cli-options");
  
  const debug = require("debug")("eslint:source-code-util");
  
  //------------------------------------------------------------------------------
  // Helpers
  //------------------------------------------------------------------------------
  
  /**
   * Get the SourceCode object for a single file
   * @param   {string}     filename The fully resolved filename to get SourceCode from.
   * @param   {Object}     options  A CLIEngine options object.
   * @returns {Array}               Array of the SourceCode object representing the file
   *                                and fatal error message.
   */
  function getSourceCodeOfFile(filename, options) {
      debug("getting sourceCode of", filename);
      const opts = Object.assign({}, options, { rules: {} });
      const cli = new CLIEngine(opts);
      const results = cli.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}`);
      }
      const sourceCode = cli.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} [providedOptions] A CLIEngine options object. If not provided, the default cli options will be used.
   * @param {progressCallback} [providedCallback] Callback for reporting execution status
   * @returns {Object} The SourceCode of all processed files.
   */
  function getSourceCodeOfFiles(patterns, providedOptions, providedCallback) {
      const sourceCodes = {};
      const globPatternsList = typeof patterns === "string" ? [patterns] : patterns;
      let options, callback;
  
      const defaultOptions = Object.assign({}, baseDefaultOptions, { cwd: process.cwd() });
  
      if (typeof providedOptions === "undefined") {
          options = defaultOptions;
          callback = null;
      } else if (typeof providedOptions === "function") {
          callback = providedOptions;
          options = defaultOptions;
      } else if (typeof providedOptions === "object") {
          options = Object.assign({}, defaultOptions, providedOptions);
          callback = providedCallback;
      }
      debug("constructed options:", options);
      const resolvedPatterns = globUtil.resolveFileGlobPatterns(globPatternsList, options);
  
      const filenames = globUtil.listFilesToProcess(resolvedPatterns, options)
          .filter(fileInfo => !fileInfo.ignored)
          .reduce((files, fileInfo) => files.concat(fileInfo.filename), []);
  
      if (filenames.length === 0) {
          debug(`Did not find any files matching pattern(s): ${resolvedPatterns}`);
      }
      filenames.forEach(filename => {
          const sourceCode = getSourceCodeOfFile(filename, options);
  
          if (sourceCode) {
              debug("got sourceCode of", filename);
              sourceCodes[filename] = sourceCode;
          }
          if (callback) {
              callback(filenames.length); // eslint-disable-line callback-return
          }
      });
      return sourceCodes;
  }
  
  module.exports = {
      getSourceCodeOfFiles
  };