Add infrastructure for setting up GraalVM.

src/graalvm.ts

@@ -0,0 +1,51 @@
+import * as c from './constants'
+import {downloadAndExtractJDK, getLatestRelease} from './utils'
+
+const GRAALVM_CE_DL_BASE =
+  'https://github.com/graalvm/graalvm-ce-builds/releases/download'
+const GRAALVM_REPO_NIGHTLY = 'graalvm-ce-dev-builds'
+const GRAALVM_REPO_RELEASES = 'graalvm-ce-builds'
+const GRAALVM_TAG_PREFIX = 'vm-'
+
+export async function setUpGraalVMLatest(javaVersion: string): Promise<string> {
+  const latestRelease = await getLatestRelease(GRAALVM_REPO_RELEASES)
+  const tag_name = latestRelease.tag_name
+  if (tag_name.startsWith(GRAALVM_TAG_PREFIX)) {
+    const latestVersion = tag_name.substring(
+      GRAALVM_TAG_PREFIX.length,
+      tag_name.length
+    )
+    return setUpGraalVMRelease(latestVersion, javaVersion)
+  }
+  throw new Error(`Could not find latest GraalVM release: ${tag_name}`)
+}
+
+export async function setUpGraalVMNightly(
+  javaVersion: string
+): Promise<string> {
+  const latestNightly = await getLatestRelease(GRAALVM_REPO_NIGHTLY)
+  const graalVMIdentifier = determineGraalVMIdentifier('dev', javaVersion)
+  const expectedFileName = `${graalVMIdentifier}${c.GRAALVM_FILE_EXTENSION}`
+  for (const asset of latestNightly.assets) {
+    if (asset.name === expectedFileName) {
+      return downloadAndExtractJDK(asset.browser_download_url)
+    }
+  }
+  throw new Error('Could not find GraalVM nightly build')
+}
+
+export async function setUpGraalVMRelease(
+  version: string,
+  javaVersion: string
+): Promise<string> {
+  const graalVMIdentifier = determineGraalVMIdentifier(version, javaVersion)
+  const downloadUrl = `${GRAALVM_CE_DL_BASE}/${GRAALVM_TAG_PREFIX}${version}/${graalVMIdentifier}${c.GRAALVM_FILE_EXTENSION}`
+  return downloadAndExtractJDK(downloadUrl)
+}
+
+function determineGraalVMIdentifier(
+  version: string,
+  javaVersion: string
+): string {
+  return `graalvm-ce-java${javaVersion}-${c.GRAALVM_PLATFORM}-amd64-${version}`
+}