Convert database copy data to markdown

parseDbCopyToMarkdown.js

const fs = require('fs')

// input format:
// 25	The Innovator’s Dilemma	The simultaneous need and danger to reinvent oneself and one's business is the dilemma.  Do we disrupt ourselves or do we double-down on core competencies?  A dilemma indeed!	http://i.imgur.com/exW4j8F.jpg	2014-08-20		2014-11-28 19:05:28.153598	2014-11-28 19:05:28.153598	Craig Christensen	http://www.amazon.com/gp/product/B00E257S86/ref=as_li_tl?ie=UTF8&camp=1789&creative=390957&creativeASIN=B00E257S86&linkCode=as2&tag=jaktre-20&linkId=5CDH2BHJK7TZT52R
const separateColumns = line => line.split('\t')
const nameColumns = line => ({
  id: line[0],
  title: line[1],
  description: line[2],
  coverUrl: line[3],
  completionDate: line[4],
  reviewUrl: line[5],
  createdAt: line[6],
  updatedAt: line[7],
  author: line[8],
  affiliateUrl: line[9]
})
const nonEmptyColumns = line => line.id !== ''
const deriveColumns = line => Object.assign({}, line, {
  descriptionSummary: line.description.substr(0, 150),
  fileName: __dirname + '/books/' + line.title.split(' ').join('-').toLowerCase() + '.md',
  reviewUrl: line.reviewUrl.replace('http', 'https')
})
const deriveFrontMatter = line => Object.assign({}, line, {
    fileContents: `---
affiliateUrl: "${line.affiliateUrl}"
author: "${line.author}"
date: "${line.completionDate}"
categories:
  - "Book"
comments: true
description: "${line.descriptionSummary}"
draft: false
keywords: ""
layout: "book"
image: "${line.coverUrl}"
reviewUrl: "${line.reviewUrl}"
title: "${line.title}"
---

${line.description}
`})
const writeFiles = line => fs.writeFileSync(line.fileName, line.fileContents)

const file = fs.readFileSync(__dirname + '/latest.sql', 'utf8')
const lines = file
        .split('\n')
        .map(separateColumns)
        .map(nameColumns)
        .filter(nonEmptyColumns)
        .map(deriveColumns)
        .map(deriveFrontMatter)
        .forEach(writeFiles)