Add initial support for early access (EA) builds.

src/constants.ts

@@ -49,6 +49,9 @@ export type LatestReleaseResponse =
 export type MatchingRefsResponse =
   otypes.Endpoints['GET /repos/{owner}/{repo}/git/matching-refs/{ref}']['response']
 
+export type ReleasesResponse =
+  otypes.Endpoints['GET /repos/{owner}/{repo}/releases']['response']
+
 function determineJDKArchitecture(): string {
   switch (process.arch) {
     case 'x64': {

src/graalvm.ts

@@ -3,6 +3,7 @@ import * as semver from 'semver'
 import {
   downloadAndExtractJDK,
   downloadExtractAndCacheJDK,
+  getLatestPrerelease,
   getLatestRelease,
   getMatchingTags,
   getTaggedRelease
@@ -13,6 +14,7 @@ import {basename} from 'path'
 
 const GRAALVM_DL_BASE = 'https://download.oracle.com/graalvm'
 const GRAALVM_CE_DL_BASE = `https://github.com/graalvm/${c.GRAALVM_RELEASES_REPO}/releases/download`
+const ORACLE_GRAALVM_REPO_EA_BUILDS = 'oracle-graalvm-dev-builds'
 const GRAALVM_REPO_DEV_BUILDS = 'graalvm-ce-dev-builds'
 const GRAALVM_JDK_TAG_PREFIX = 'jdk-'
 const GRAALVM_TAG_PREFIX = 'vm-'
@@ -45,6 +47,8 @@ export async function setUpGraalVMJDK(
         `java-version set to '${javaVersion}'. Please make sure the java-version is set correctly. ${c.ERROR_HINT}`
       )
     }
+  } else if (javaVersion === '22-ea') {
+    downloadUrl = await findLatestEABuildDownloadUrl(javaVersion)
   } else {
     downloadUrl = `${GRAALVM_DL_BASE}/${javaVersion}/latest/${toolName}${c.GRAALVM_FILE_EXTENSION}`
   }
@@ -52,6 +56,27 @@ export async function setUpGraalVMJDK(
   return downloadExtractAndCacheJDK(downloader, toolName, javaVersion)
 }
 
+async function findLatestEABuildDownloadUrl(
+  javaEaVersion: string
+): Promise<string> {
+  const latestPrerelease = await getLatestPrerelease(
+    ORACLE_GRAALVM_REPO_EA_BUILDS
+  )
+  const expectedFileNamePrefix = 'graalvm-jdk-'
+  const expectedFileNameSuffix = `_${c.JDK_PLATFORM}-${c.JDK_ARCH}_bin${c.GRAALVM_FILE_EXTENSION}`
+  for (const asset of latestPrerelease.assets) {
+    if (
+      asset.name.startsWith(expectedFileNamePrefix) &&
+      asset.name.endsWith(expectedFileNameSuffix)
+    ) {
+      return asset.browser_download_url
+    }
+  }
+  throw new Error(
+    `Could not find Oracle GraalVM build for ${javaEaVersion}. ${c.ERROR_HINT}`
+  )
+}
+
 export async function setUpGraalVMJDKCE(
   javaVersionOrDev: string
 ): Promise<string> {

src/utils.ts

@@ -33,6 +33,25 @@ export async function exec(
   }
 }
 
+export async function getLatestPrerelease(
+  repo: string
+): Promise<c.ReleasesResponse['data'][number]> {
+  const githubToken = getGitHubToken()
+  const options = githubToken.length > 0 ? {auth: githubToken} : {}
+  const octokit = new GitHubDotCom(options)
+  const releases: c.ReleasesResponse['data'] = (
+    await octokit.request('GET /repos/{owner}/{repo}/releases', {
+      owner: c.GRAALVM_GH_USER,
+      repo
+    })
+  ).data
+  const firstPrerelease = releases.find(r => r.prerelease)
+  if (!firstPrerelease) {
+    throw new Error(`Unable to find latest prerelease in ${repo}`)
+  }
+  return firstPrerelease
+}
+
 export async function getLatestRelease(
   repo: string
 ): Promise<c.LatestReleaseResponse['data']> {