wallpaper.js

const fetch = require('node-fetch')
const fs = require('fs-extra')
const { execSync } = require('child_process')

const main = async () => {
  const query = `nasa,cycling,surfing,underwater,swimming`
  const size = `1`
  const order = `latest`
  const orientation=`landscape`
  const photoName = 'photo.png'
  //
  const url = `https://api.unsplash.com/search/photos/?client_id=YOUR_KEY&query=${query}&per_page=${size}&order_by=${order}&orientation=${orientation}`

  await fetch( url,
  {
    headers: {
      'Content-Type': 'application/json',
    },
  })
  .then(async (resp) => {
    //
    if (resp.ok === true) {
      let result = await resp.json()
      const { results } = result
      const image_url = results[0].urls.full
      //
      await fetch(image_url)
      .then(async (resp) => {
        const buf = await resp.buffer()
        fs.writeFileSync( photoName, buf )
      })
      .catch((err) => console.log('[fetch] 其它原因出錯', err))

    } else {
      const fail = await resp.text()
      console.log(`[fetch] 失敗`, fail)
    }
  })
  .catch((err) => console.log('[fetch] 其它原因出錯', err))
  execSync(`wallpaper set ${__dirname}/photo.png`)
}

main()

使用方式：

1. 下載此份程式並安裝它所需的 npm 套件(例如 node-fetch 與 fs-extra)

2. 先裝 wallpaper

$ brew install wallpaper

3. 設定 crontab 每五分鐘跑此程式一次

*/5 5-17 * * * /usr/local/bin/node /full/path/to/folder/run.js