Run with `deno run --allow-net deno.ts`

milestones.js

import { Octokit } from 'https://cdn.skypack.dev/@octokit/core'
// import { Endpoints } from 'https://cdn.skypack.dev/@octokit/types'

// type listMilestonesParameters = Endpoints['GET /repos/{owner}/{repo}/milestones']['parameters']
// type listMilestonesResponse = Endpoints['GET /repos/{owner}/{repo}/milestones']['response']

const token = 'ghp_....'
const octokit = new Octokit({ auth: token })
// const repos = await octokit.request('GET /user/repos')
// console.log(repos.data)

const milestones = [
  {
    title: '3.5.0',
    //     "description": ""
    due_on: '2021-11-16T07:00:00Z',
  },
]

const repos = [
  'studio',
  'studio-code',
  'prisma-engines',
  'pdp-control-plane',
  'prisma-examples',
  'introspection-ci',
  'migrations-ci',
  'e2e-tests',
  'language-tools',
  'engines-wrapper',
  'prisma-client-go',
  'checkpoint.prisma.io',
  'checkpoint-client',
  're-introspection-ci',
  //   'quaint', // no permission
  'nexus-prisma',
  'lens',
  'migrations-team',
  'prisma-private',
  'error-reporting-gui',
  'database-schema-examples',
]

// // https://docs.github.com/en/rest/reference/issues#milestones
// // const milestonesPrisma = await octokit.request(`GET /repos/{owner}/{repo}/milestones`)
// // console.log(milestonesPrisma)

for (let r = 0; r < repos.length; r++) {
  const repo = repos[r]

  // // List and close a specific milestone
  const milestoneTitleToClose = '3.4.0'
  if (milestoneTitleToClose) {
    const milestones = await octokit.request(`GET /repos/{owner}/{repo}/milestones`, {
      owner: 'prisma',
      repo: repo,
    })
    // @ts-ignore
    const milestoneToClose = milestones.data.find((it) => it.title === milestoneTitleToClose && it.state === 'open')
    console.log('Found a milestone to close')

    if (milestoneToClose) {
      const closeMilestoneResult = await octokit.request(`patch /repos/{owner}/{repo}/milestones/{milestone_number}`, {
        owner: 'prisma',
        repo: repo,
        milestone_number: milestoneToClose.number,
        state: 'closed',
      })
      console.log(`Closed id:${closeMilestoneResult.data.number} title:${closeMilestoneResult.data.title}`)
    }
  }

  // // Create milestones
  // for (let m = 0; m < milestones.length; m++) {
  //   const milestone = milestones[m]
  //   const payload = {
  //     owner: 'prisma',
  //     repo: repo,
  //     title: milestone.title,
  //     //     description: milestone.description,
  //     due_on: milestone.due_on,
  //   }

  //   try {
  //     const result = await octokit.request(`POST /repos/{owner}/{repo}/milestones`, payload)
  //     console.log(result)
  //   } catch (e) {
  //     if (e.status === 422) {
  //       console.log(`${repo} - ${milestone.title} already exists`)
  //     } else {
  //       throw e
  //     }
  //   }
  // }
}