@heroku-cli/plugin-pg-v5/commands/repoint.js

Heroku CLI plugin to manage Postgres.

'use strict'

const cli = require('heroku-cli-util')

async function run(context, heroku) {
  cli.warn('This is a beta command and is not considered reliable or complete. Use with caution.')
  const host = require('../lib/host')
  const util = require('../lib/util')
  const fetcher = require('../lib/fetcher')(heroku)
  let {app, args, flags} = context
  let db = await fetcher.addon(app, args.database)

  if (util.essentialPlan(db)) throw new Error('pg:repoint is only available for follower databases on at least the Standard tier.')

  let replica = await heroku.get(`/client/v11/databases/${db.id}`, {host: host(db)})

  if (!replica.following) {
    throw new Error('pg:repoint is only available for follower databases on at least the Standard tier.')
  }

  let origin = util.databaseNameFromUrl(replica.following, await heroku.get(`/apps/${app}/config-vars`))

  let newLeader = await fetcher.addon(app, flags.follow)

  await cli.confirmApp(app, flags.confirm, `WARNING: Destructive action
${cli.color.addon(db.name)} will be repointed to follow ${newLeader.name}, and stop following ${origin}.

This cannot be undone.`)

  let data = {follow: newLeader.id}
  await cli.action(`Starting repoint of ${cli.color.addon(db.name)}`, (async function () {
    await heroku.post(`/client/v11/databases/${db.id}/repoint`, {host: host(db), body: data})
    cli.action.done(`${cli.color.cmd('heroku pg:wait')} to track status`)
  })())
}

module.exports = {
  hidden: true,
  topic: 'pg',
  command: 'repoint',
  description: 'changes which leader a follower is following',
  help: `Example:

    heroku pg:repoint postgresql-transparent-56874 --follow postgresql-lucid-59103 -a woodstock-production
`,
  needsApp: true,
  needsAuth: true,
  args: [{name: 'database', optional: true}],
  flags: [
    {name: 'confirm', char: 'c', hasValue: true},
    {name: 'follow', description: 'leader database to follow', hasValue: true},
  ],
  run: cli.command({preauth: true}, run),
}