Converts a Sketch file's artboards to a folder of SVGs and outputs an array of path data

icons.js

const { readdirSync, readFileSync, writeFileSync } = require('fs')
const { resolve } = require('path')
const del = require('del')
const svgson = require('svgson')
const SketchTool = require('sketch-tool')

const IN_PATH = resolve(__dirname, 'icons.sketch')
const OUT_PATH = resolve(__dirname, '../packages/icons.js')

const Sketch = new SketchTool({
  file: IN_PATH,
})
const svgsDir = resolve(__dirname, '../.svgs')

Sketch.exportCall('artboards', {
  formats: 'svg',
  output: svgsDir,
}).then(() => {
  const files = readdirSync(svgsDir)
  const jsonData = {}

  function writeJsonData() {
    const module = `export default ${JSON.stringify(jsonData)}`
    writeFileSync(OUT_PATH, module)
    del(svgsDir)
  }

  files.forEach((file, index) => {
    const contents = readFileSync(`${svgsDir}/${file}`)
    svgson(contents, { svgo: true, pretty: true }, svg => {
      const node = svg.childs[1]
      const key = file.replace('.svg', '')

      if (node.name === 'g') {
        node.childs.forEach((childNode, index) => {
          jsonData[`${key}-${index}`] = childNode.attrs.d
        })
      } else {
        jsonData[key] = node.attrs.d
      }

      if (index === files.length - 1) {
        writeJsonData()
      }
    })
  })
})

This was eventually built into a Webpack loader found here: https://github.com/souporserious/sketch-to-svg-json-loader