IndianredVibrantChapters created by jsdario - https://repl.it/@jsdario/IndianredVibrantChapters

index.js

const fetch = require('node-fetch')

fetch('https://api.github.com/repos/netbeast/dashboard/git/trees/master?recursive=1')
.then(r => r.json())
.then(data => {
  const h = turnGitHubTreeIntoD3Hierarchy(data)
  console.log(h)
  })
.catch(console.error)

const emptyHierarchy = {
  name: 'root',
  children: []
}

function turnGitHubTreeIntoD3Hierarchy (githubData) {
  return githubData.tree.reduce(reducer, [])
}


function reducer (acc, curr, currIdx, arr) {
  const children = arr.filter(node =>
    isChildOf(node.path, curr.path)
  )

  const [name, ...rest] = curr.path.split('/').reverse()

  const depth = curr.path.split('/').length - 1

  // Buenísima jugada esta
  if (depth > 0 && children.length < 1) {
    return acc
  }

  return [...acc, {...curr, name, depth, children}]
}

const isChildOf = (child, parent) => {
  if (child === parent) return false
  const parentTokens = parent.split('/').filter(i => i.length)
  return parentTokens.every((t, i) => child.split('/')[i] === t)
}

package-lock.json

{
  "requires": true,
  "lockfileVersion": 1,
  "dependencies": {
    "node-fetch": {
      "version": "2.2.0",
      "resolved": "https://registry.npmjs.org/node-fetch/-/node-fetch-2.2.0.tgz",
      "integrity": "sha512-OayFWziIxiHY8bCUyLX6sTpDH8Jsbp4FfYd1j1f7vZyfgkcOnAyM4oQR16f8a0s7Gl/viMGRey8eScYk4V4EZA=="
    }
  }
}