const FILENAMES = ['index', 'readme']; const MARKUP_EXTENSIONS = [ 'ad', 'adoc', 'asciidoc', 'creole', 'markdown', 'md', 'mdown', 'mediawiki', 'mkd', 'mkdn', 'org', 'rdoc', 'rst', 'textile', 'wiki', ]; const isRichReadme = file => { const re = new RegExp(`^(${FILENAMES.join('|')})\\.(${MARKUP_EXTENSIONS.join('|')})$`, 'i'); return re.test(file.name); }; const isPlainReadme = file => { const re = new RegExp(`^(${FILENAMES.join('|')})(\\.txt)?$`, 'i'); return re.test(file.name); }; // eslint-disable-next-line import/prefer-default-export export const readmeFile = blobs => blobs.find(isRichReadme) || blobs.find(isPlainReadme);