@jti/task/install.js

This package installs go-task in the `bin` folder.

#!/usr/bin/env node

// Installs a platform/arch appropriate binary for go-task/task.

'use strict'

const axios       = require('axios')
const decompress  = require('decompress')
const fs          = require('fs')
const path        = require('path')

// Debugging helper.
const DEBUG = false
const debug = function (...msgs) {
  if (DEBUG) {
    for (let m of msgs) {
      console.log(m)
    }
  }
}

const cwd = process.env.INIT_CWD
  ? process.env.INIT_CWD
  : process.cwd()
const { platform, arch } = process
const taskVersion  = '3.41.0'
const targetFolder = path.join(__dirname, 'bin')

// Returns the release-specific platform string based on platform
const mapPlatform = (map = {}) => {
  if (!(platform in map)) return null
  return map[platform]
}

// Returns the release-specific arch string based on arch
const mapArch = (map = {}) => {
  if (!(arch in map)) return null
  return map[arch]
}

const getRelease = async (url, targetFolder) => {
  console.log(`Installing ${url} into ${targetFolder}`)
  let res = await axios.get(url, { responseType: 'arraybuffer' })
  try {
    if (!fs.existsSync(targetFolder)) {
      fs.mkdirSync(targetFolder,  { recursive: true })
    }
    debug(`Created target folder!`, targetFolder)
  }
  catch (err) {
    console.log(`Could not create target folder:`, err)
  }

  try {
    let dres = await decompress(res.data, targetFolder)
    debug(`Decompressed assets:`, dres)
  }
  catch (err) {
    console.log(`Could not decompress downloaded asset:`, err)
  }
}

const task = async () => {
  // Set up the download URL for the appropriate platform/arch.
  const p = mapPlatform({
    'darwin': 'darwin',
    'linux': 'linux',
    'win32': 'windows'
  })

  const a = mapArch({
    'x86': '386',
    'x64': 'amd64',
    'arm': 'arm',
    'arm64': 'arm64',
  })

  if (!p || !a) {
    console.log(`No task release available for $${platform}/${arch}.`)
    return
  }

  const ext = (p === 'windows') ? 'zip' : 'tar.gz'
  if (ext !== 'tar.gz' && ext !== 'zip') {
    console.log(`Don't know how to handle a .${ext} file!`)
    return
  }

  const url = `https://github.com/go-task/task/releases/download/`
    + `v${taskVersion}/task_${p}_${a}.${ext}`

  await getRelease(url, targetFolder)
}

console.log(`Installing task...`)
task()