function copyDocsVersion()

in gulpfile.js [147:182]

• 14 lines of code
• 1 McCabe index (conditional complexity)

function copyDocsVersion (oldVersion, newVersion, cb) {
    // copying a folder and a ToC file for each language
    const numCopyOperations = LANGUAGES.length * 2;

    // pseudo-CV (condition variable)
    let numCopied = 0;
    function doneCopying (error) {
        if (error) {
            cb(error);
            return;
        }

        // call callback if all folders have finished copying
        numCopied += 1;
        if (numCopied === numCopyOperations) {
            cb();
        }
    }

    // create a new version for each language
    LANGUAGES.forEach(function (languageName) {
        // get files to copy
        const oldVersionDocs = path.join(DOCS_DIR, languageName, oldVersion);
        const oldVersionToc = path.join(TOC_DIR, srcTocfileName(languageName, oldVersion));
        const newVersionDocs = path.join(DOCS_DIR, languageName, newVersion);
        const newVersionToc = path.join(TOC_DIR, srcTocfileName(languageName, newVersion));

        // copy docs
        console.log(oldVersionDocs + ' -> ' + newVersionDocs);
        fs.cp(oldVersionDocs, newVersionDocs, { recursive: true, force: true }, doneCopying);

        // copy ToC
        console.log(oldVersionToc + ' -> ' + newVersionToc);
        fs.cp(oldVersionToc, newVersionToc, { recursive: true, force: true }, doneCopying);
    });
}