Better error for 404

index.js

@@ -164,8 +164,8 @@ function validateRubyEngineAndVersion(platform, engineVersions, engine, parsedVe
  if (found) {
  version = found
  } else {
- throw new Error(`Unknown version ${parsedVersion} for ${engine} on ${platform}
- available versions for ${engine} on ${platform}: ${engineVersions.join(', ')}
+ throw new Error(`Unknown version ${parsedVersion} for ${engine} on ${platform}.
+ Available versions for ${engine} on ${platform}: ${engineVersions.join(', ')}.
  Make sure you use the latest version of the action with - uses: ruby/setup-ruby@v1`)
  }
  }

ruby-builder.js

@@ -69,7 +69,17 @@ async function downloadAndExtract(platform, engine, version, rubyPrefix) {
  const downloadPath = await common.measure('Downloading Ruby', async () => {
  const url = getDownloadURL(platform, engine, version)
  console.log(url)
- return await tc.downloadTool(url)
+ try {
+ return await tc.downloadTool(url)
+ } catch (error) {
+ if (error.message.endsWith('404')) {
+ throw new Error(`Unavailable version ${version} for ${engine} on ${platform}.
+ You can request it at https://github.com/ruby/setup-ruby/issues.
+ Original Error: (${error.message})`)
+ } else {
+ throw error
+ }
+ }
  })
 
  await common.measure('Extracting Ruby', async () => {