split js function into each markdown

gulpfile.js

const jsdoc2md = require('jsdoc-to-markdown')
const gulp = require('gulp')
const glob = require('glob')
const path = require('path')
const fs = require('fs-extra')

const docDir = './docs'

async function doJsdoc2md() {
    const fileSrc = 'src/**/*.js';
    const files = glob.sync(fileSrc);

    files.forEach(async file => {
        if (file.indexOf('src/index') >= 0) return;
        const modName = path.basename(file, '.js');
        let filename = modName + '.md';

        let jsdocOptions = {
            files: file,
            template: fs.readFileSync('./template.hbs', 'utf8'),
            plugin: ['dmd-plugin-gitbook'],
            noCache: true
        }

        await jsdoc2md.getTemplateData({
            files: file,
        }).then(blocks => {
            const dir = path.join(outputDir, modName);
            fs.ensureDirSync(dir)
            blocks.forEach(async b => {
                if (b.kind == 'function') {
                    let name = b.name
                    await jsdoc2md
                            .render({...jsdocOptions, data: [b], template: fs.readFileSync('./template.hbs', 'utf8')})
                            .then(output => {
                                fs.outputFileSync(path.join(dir, `${name}.md`), output)
                            });
                } else if (b.kind == 'module') {
                    await jsdoc2md
                            .render({...jsdocOptions, source: b, template: fs.readFileSync('./readme.hbs', 'utf8')})
                            .then(output => fs.outputFileSync(path.join(dir, `readme.md`), output));
                }
            })
        })
    })

    const readmeFile = 'README.md';
    fs.copySync(`./${readmeFile}`, path.join(docDir, readmeFile))
}

exports.js2doc = gulp.parallel(doJsdoc2md);