code: function generateRuleIndexPage(basedir) {
      const outputFile = "../eslint.github.io/_data/rules.yml",
          categoryList = "conf/category-list.json",
          categoriesData = JSON.parse(cat(path.resolve(categoryList)));
  
      find(path.join(basedir, "/lib/rules/")).filter(fileType("js"))
          .map(filename => [filename, path.basename(filename, ".js")])
          .sort((a, b) => a[1].localeCompare(b[1]))
          .forEach(pair => {
              const filename = pair[0];
              const basename = pair[1];
              const rule = require(filename);
  
              if (rule.meta.deprecated) {
                  categoriesData.deprecated.rules.push({
                      name: basename,
                      replacedBy: rule.meta.replacedBy || []
                  });
              } else {
                  const output = {
                          name: basename,
                          description: rule.meta.docs.description,
                          recommended: rule.meta.docs.recommended || false,
                          fixable: !!rule.meta.fixable
                      },
                      category = lodash.find(categoriesData.categories, { name: rule.meta.docs.category });
  
                  if (!category.rules) {
                      category.rules = [];
                  }
  
                  category.rules.push(output);
              }
          });
  
      const output = yaml.safeDump(categoriesData, { sortKeys: true });
  
      output.to(outputFile);
  }
docs: Generate a doc page that lists all of the rules and links to them
  @param {string} basedir The directory in which to look for code.
  @returns {void}