rubygems.js

const common = require('./common')
const path = require('path')
const exec = require('@actions/exec')

export async function rubygemsUpdate(rubygemsVersionInput, rubyPrefix, platform, engine, rubyVersion) {
  const gem = path.join(rubyPrefix, 'bin', 'gem')

  const { stdout } = await exec.getExecOutput(gem, ['--version'])

  const gemVersion = stdout.trim()
  console.log(`Default RubyGems version is ${gemVersion}`)

  if (rubygemsVersionInput === 'latest') {
    console.log('Updating RubyGems to latest version')
    await rubygemsLatest(gem, platform, engine, rubyVersion)
  } else if ((await compareGemVersion(rubygemsVersionInput, gemVersion, rubyPrefix)) === 1) {
    console.log(`Updating RubyGems to ${rubygemsVersionInput}`)
    await exec.exec(gem, ['update', '--system', rubygemsVersionInput])
  } else {
    console.log(`Skipping RubyGems update because the given version (${rubygemsVersionInput}) is not newer than the default version (${gemVersion})`)
  }

  return true
}

async function compareGemVersion(a, b, rubyPrefix) {
  const ruby = path.join(rubyPrefix, 'bin', 'ruby')

  const { stdout } = await exec.getExecOutput(ruby, ['-e', 'puts Gem::Version.new(ARGV[0]) <=> Gem::Version.new(ARGV[1])', '--', a, b])

  return parseInt(stdout)
}

// Older RubyGems versions do not account for 'required_ruby_version' when
// running 'gem update --system', so we have to force a compatible version of
// rubygems-update.  See https://github.com/ruby/setup-ruby/pull/551 and
// https://github.com/rubygems/rubygems/issues/7329
async function rubygemsLatest(gem, platform, engine, rubyVersion) {
  if (engine === 'ruby') {
    const floatVersion = common.floatVersion(rubyVersion)
    if (common.isHeadVersion(rubyVersion)) {
      console.log('Ruby master builds use included RubyGems')
    } else if (floatVersion >= 3.2) {
      await exec.exec(gem, ['update', '--system'])
    } else if (floatVersion >= 3.1) {
      await exec.exec(gem, ['update', '--system', '3.6.9'])
    } else if (floatVersion >= 3.0) {
      await exec.exec(gem, ['update', '--system', '3.5.23'])
    } else if (floatVersion >= 2.6) {
      await exec.exec(gem, ['update', '--system', '3.4.22'])
    } else if (floatVersion >= 2.3) {
      await exec.exec(gem, ['update', '--system', '3.3.27'])
    } else if (floatVersion >= 1.9) {
      await exec.exec(`${gem} install rubygems-update -v 2.7.11 --no-document`)
      await exec.exec('update_rubygems')
    } else {
      console.log(`Cannot update RubyGems for Ruby version ${rubyVersion}`)
    }
  } else {
    // non MRI Rubies (TruffleRuby and JRuby)
    await exec.exec(gem, ['update', '--system'])
  }
}