Follow ruby-install-builder => ruby-builder repository rename

ruby-builder.js

@@ -0,0 +1,57 @@
+const os = require('os')
+const path = require('path')
+const core = require('@actions/core')
+const io = require('@actions/io')
+const tc = require('@actions/tool-cache')
+const rubyBuilderVersions = require('./ruby-builder-versions')
+const axios = require('axios')
+
+const builderReleaseTag = 'builds-newer-openssl'
+const releasesURL = 'https://github.com/eregon/ruby-builder/releases'
+
+export function getAvailableVersions(platform, engine) {
+  return rubyBuilderVersions.getVersions(platform)[engine]
+}
+
+export async function install(platform, ruby) {
+  const rubyPrefix = await downloadAndExtract(platform, ruby)
+
+  core.addPath(path.join(rubyPrefix, 'bin'))
+  if (ruby.startsWith('rubinius')) {
+    core.addPath(path.join(rubyPrefix, 'gems', 'bin'))
+  }
+
+  return rubyPrefix
+}
+
+async function downloadAndExtract(platform, ruby) {
+  const rubiesDir = path.join(os.homedir(), '.rubies')
+  await io.mkdirP(rubiesDir)
+
+  const url = await getDownloadURL(platform, ruby)
+  console.log(url)
+
+  const downloadPath = await tc.downloadTool(url)
+  await tc.extractTar(downloadPath, rubiesDir)
+
+  return path.join(rubiesDir, ruby)
+}
+
+async function getDownloadURL(platform, ruby) {
+  if (ruby.endsWith('-head')) {
+    return getLatestHeadBuildURL(platform, ruby)
+  } else {
+    return `${releasesURL}/download/${builderReleaseTag}/${ruby}-${platform}.tar.gz`
+  }
+}
+
+async function getLatestHeadBuildURL(platform, ruby) {
+  const engine = ruby.split('-')[0]
+  const repository = `eregon/${engine}-dev-builder`
+  const metadataURL = `https://raw.githubusercontent.com/${repository}/metadata/latest_build.tag`
+  const releasesURL = `https://github.com/${repository}/releases/download`
+
+  const response = await axios.get(metadataURL)
+  const tag = response.data.trim()
+  return `${releasesURL}/${tag}/${ruby}-${platform}.tar.gz`
+}