Allow java-version: 'dev' if version: 'dev'.

Fixes #30

.github/workflows/test.yml

@@ -26,7 +26,7 @@ jobs:
     strategy:
       matrix:
         version: [latest, dev]
-        java-version: ['17', '19']
+        java-version: ['19']
         components: ['native-image']
         os: [macos-latest, windows-latest, ubuntu-latest]
         include:
@@ -42,6 +42,10 @@ jobs:
             java-version: '17'
             components: 'native-image'
             os: windows-2022
+          - version: 'dev'
+            java-version: 'dev'
+            components: 'native-image'
+            os: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
       - name: Run setup-graalvm action
@@ -77,10 +81,19 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        version: ['22.3.0', 'latest']
+        version: ['latest']
-        java-version: ['11', '17', '19']
+        java-version: ['19']
         components: ['native-image']
         os: [macos-latest, windows-latest, ubuntu-latest]
+        include:
+          - version: '22.3.0'
+            java-version: '11'
+            components: 'native-image'
+            os: ubuntu-latest
+          - version: '22.3.0'
+            java-version: '17'
+            components: 'native-image'
+            os: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
       - name: Run setup-graalvm action
@@ -172,8 +185,8 @@ jobs:
       - name: Run setup-graalvm action
         uses: ./
         with:
-          version: 'latest'
+          version: 'dev'
-          java-version: '19'
+          java-version: 'dev'
           components: 'native-image'
           native-image-musl: 'true'
           native-image-job-reports: 'true'
@@ -196,7 +209,7 @@ jobs:
       - name: Run setup-graalvm action
         uses: ./
         with:
-          version: 'dev'
+          version: 'latest'
           java-version: '17'
           components: 'espresso,llvm-toolchain,native-image,nodejs,python,R,ruby,wasm'
           set-java-home: 'false'

README.md

@@ -116,7 +116,7 @@ jobs:
 |-----------------|:--------:|-------------|
 | `version`<br>*(required)* | n/a | `X.Y.Z` (e.g., `22.3.0`) for a specific [GraalVM release][releases]<br>`latest` for [latest stable release][stable],<br>`dev` for [latest dev build][dev-build],<br>`mandrel-X.Y.Z` (e.g., `mandrel-21.3.0.0-Final`) for a specific [Mandrel release][mandrel-releases],<br>`mandrel-latest` for [latest Mandrel stable release][mandrel-stable]. |
 | `gds-token`     | `''`     | Download token for the GraalVM Download Service. If a non-empty token is provided, the action will set up GraalVM Enterprise Edition (see [GraalVM EE template](#basic-graalvm-enterprise-edition-template)). |
-| `java-version`<br>*(required)* | n/a | `'17'` or `'19'` for a specific Java version.<br>(`'8'`, `'11'`, `'16'` are supported for older GraalVM releases.) |
+| `java-version`<br>*(required)* | n/a | `'17'` or `'19'` for a specific Java version, `'dev'` for the highest Java version available (requires `version: 'dev'`).<br>(`'8'`, `'11'`, `'16'` are supported for older GraalVM releases.) |
 | `components`    | `''`     | Comma-spearated list of GraalVM components (e.g., `native-image` or `ruby,nodejs`) that will be installed by the [GraalVM Updater][gu]. |
 | `github-token`  | `''`     | Token for communication with the GitHub API. Please set to `${{ secrets.GITHUB_TOKEN }}` (see [templates](#templates)) to allow the action to authenticate with the GitHub API, which helps to reduce rate limiting issues. |
 | `set-java-home` | `'true'` | If set to `'true'`, instructs the action to set `$JAVA_HOME` to the path of the GraalVM installation. Overrides any previous action or command that sets `$JAVA_HOME`. |

__tests__/graalvm.test.ts

@@ -1,6 +1,9 @@
 import * as path from 'path'
 import * as graalvm from '../src/graalvm'
 import {expect, test} from '@jest/globals'
+import {getLatestRelease} from '../src/utils'
+import {findGraalVMVersion, findHighestJavaVersion} from '../src/graalvm'
+import {GRAALVM_RELEASES_REPO} from '../src/constants'
 
 process.env['RUNNER_TOOL_CACHE'] = path.join(__dirname, 'TOOL_CACHE')
 process.env['RUNNER_TEMP'] = path.join(__dirname, 'TEMP')
@@ -23,3 +26,27 @@ test('request invalid version/javaVersion', async () => {
     expect(error.message).toContain('Are you sure version')
   }
 })
+
+test('find version/javaVersion', async () => {
+  const latestRelease = await getLatestRelease(GRAALVM_RELEASES_REPO)
+  const latestVersion = findGraalVMVersion(latestRelease)
+  expect(latestVersion).not.toBe('')
+  const latestJavaVersion = findHighestJavaVersion(latestRelease, latestVersion)
+  expect(latestJavaVersion).not.toBe('')
+
+  let error = new Error('unexpected')
+  try {
+    const invalidRelease = {...latestRelease, tag_name: 'invalid'}
+    findGraalVMVersion(invalidRelease)
+  } catch (err) {
+    error = err
+  }
+  expect(error.message).toContain('Could not find latest GraalVM release:')
+
+  try {
+    findHighestJavaVersion(latestRelease, 'invalid')
+  } catch (err) {
+    error = err
+  }
+  expect(error.message).toContain('Could not find highest Java version.')
+})

dist/cleanup/index.js

@@ -73818,7 +73818,7 @@ else {
 "use strict";
 
 Object.defineProperty(exports, "__esModule", ({ value: true }));
-exports.EVENT_NAME_PULL_REQUEST = exports.ENV_GITHUB_EVENT_NAME = exports.GDS_GRAALVM_PRODUCT_ID = exports.GDS_BASE = exports.MANDREL_NAMESPACE = exports.JDK_HOME_SUFFIX = exports.GRAALVM_PLATFORM = exports.GRAALVM_GH_USER = exports.GRAALVM_FILE_EXTENSION = exports.GRAALVM_ARCH = exports.VERSION_LATEST = exports.VERSION_DEV = exports.IS_WINDOWS = exports.IS_MACOS = exports.IS_LINUX = exports.INPUT_NI_MUSL = exports.INPUT_CHECK_FOR_UPDATES = exports.INPUT_CACHE = exports.INPUT_SET_JAVA_HOME = exports.INPUT_GITHUB_TOKEN = exports.INPUT_COMPONENTS = exports.INPUT_JAVA_VERSION = exports.INPUT_GDS_TOKEN = exports.INPUT_VERSION = void 0;
+exports.EVENT_NAME_PULL_REQUEST = exports.ENV_GITHUB_EVENT_NAME = exports.GDS_GRAALVM_PRODUCT_ID = exports.GDS_BASE = exports.MANDREL_NAMESPACE = exports.JDK_HOME_SUFFIX = exports.GRAALVM_RELEASES_REPO = exports.GRAALVM_PLATFORM = exports.GRAALVM_GH_USER = exports.GRAALVM_FILE_EXTENSION = exports.GRAALVM_ARCH = exports.VERSION_LATEST = exports.VERSION_DEV = exports.IS_WINDOWS = exports.IS_MACOS = exports.IS_LINUX = exports.INPUT_NI_MUSL = exports.INPUT_CHECK_FOR_UPDATES = exports.INPUT_CACHE = exports.INPUT_SET_JAVA_HOME = exports.INPUT_GITHUB_TOKEN = exports.INPUT_COMPONENTS = exports.INPUT_JAVA_VERSION = exports.INPUT_GDS_TOKEN = exports.INPUT_VERSION = void 0;
 exports.INPUT_VERSION = 'version';
 exports.INPUT_GDS_TOKEN = 'gds-token';
 exports.INPUT_JAVA_VERSION = 'java-version';
@@ -73837,6 +73837,7 @@ exports.GRAALVM_ARCH = determineGraalVMArchitecture();
 exports.GRAALVM_FILE_EXTENSION = exports.IS_WINDOWS ? '.zip' : '.tar.gz';
 exports.GRAALVM_GH_USER = 'graalvm';
 exports.GRAALVM_PLATFORM = exports.IS_WINDOWS ? 'windows' : process.platform;
+exports.GRAALVM_RELEASES_REPO = 'graalvm-ce-builds';
 exports.JDK_HOME_SUFFIX = exports.IS_MACOS ? '/Contents/Home' : '';
 exports.MANDREL_NAMESPACE = 'mandrel-';
 exports.GDS_BASE = 'https://gds.oracle.com/api/20220101';

dist/main/index.js

@@ -73707,7 +73707,7 @@ try {
 "use strict";
 
 Object.defineProperty(exports, "__esModule", ({ value: true }));
-exports.EVENT_NAME_PULL_REQUEST = exports.ENV_GITHUB_EVENT_NAME = exports.GDS_GRAALVM_PRODUCT_ID = exports.GDS_BASE = exports.MANDREL_NAMESPACE = exports.JDK_HOME_SUFFIX = exports.GRAALVM_PLATFORM = exports.GRAALVM_GH_USER = exports.GRAALVM_FILE_EXTENSION = exports.GRAALVM_ARCH = exports.VERSION_LATEST = exports.VERSION_DEV = exports.IS_WINDOWS = exports.IS_MACOS = exports.IS_LINUX = exports.INPUT_NI_MUSL = exports.INPUT_CHECK_FOR_UPDATES = exports.INPUT_CACHE = exports.INPUT_SET_JAVA_HOME = exports.INPUT_GITHUB_TOKEN = exports.INPUT_COMPONENTS = exports.INPUT_JAVA_VERSION = exports.INPUT_GDS_TOKEN = exports.INPUT_VERSION = void 0;
+exports.EVENT_NAME_PULL_REQUEST = exports.ENV_GITHUB_EVENT_NAME = exports.GDS_GRAALVM_PRODUCT_ID = exports.GDS_BASE = exports.MANDREL_NAMESPACE = exports.JDK_HOME_SUFFIX = exports.GRAALVM_RELEASES_REPO = exports.GRAALVM_PLATFORM = exports.GRAALVM_GH_USER = exports.GRAALVM_FILE_EXTENSION = exports.GRAALVM_ARCH = exports.VERSION_LATEST = exports.VERSION_DEV = exports.IS_WINDOWS = exports.IS_MACOS = exports.IS_LINUX = exports.INPUT_NI_MUSL = exports.INPUT_CHECK_FOR_UPDATES = exports.INPUT_CACHE = exports.INPUT_SET_JAVA_HOME = exports.INPUT_GITHUB_TOKEN = exports.INPUT_COMPONENTS = exports.INPUT_JAVA_VERSION = exports.INPUT_GDS_TOKEN = exports.INPUT_VERSION = void 0;
 exports.INPUT_VERSION = 'version';
 exports.INPUT_GDS_TOKEN = 'gds-token';
 exports.INPUT_JAVA_VERSION = 'java-version';
@@ -73726,6 +73726,7 @@ exports.GRAALVM_ARCH = determineGraalVMArchitecture();
 exports.GRAALVM_FILE_EXTENSION = exports.IS_WINDOWS ? '.zip' : '.tar.gz';
 exports.GRAALVM_GH_USER = 'graalvm';
 exports.GRAALVM_PLATFORM = exports.IS_WINDOWS ? 'windows' : process.platform;
+exports.GRAALVM_RELEASES_REPO = 'graalvm-ce-builds';
 exports.JDK_HOME_SUFFIX = exports.IS_MACOS ? '/Contents/Home' : '';
 exports.MANDREL_NAMESPACE = 'mandrel-';
 exports.GDS_BASE = 'https://gds.oracle.com/api/20220101';
@@ -74081,13 +74082,15 @@ const core = __importStar(__nccwpck_require__(2186));
 const utils_1 = __nccwpck_require__(1314);
 const semver_1 = __nccwpck_require__(1383);
 const graalvm_1 = __nccwpck_require__(5254);
+const constants_1 = __nccwpck_require__(9042);
 function checkForUpdates(graalVMVersion, javaVersion) {
     return __awaiter(this, void 0, void 0, function* () {
         if (graalVMVersion === '22.3.0' && javaVersion === '11') {
             core.notice('Please consider upgrading your project to Java 17+. The GraalVM 22.3.0 release is the last to support JDK11: https://github.com/oracle/graal/issues/5063');
             return;
         }
-        const latestGraalVMVersion = yield graalvm_1.getLatestReleaseVersion();
+        const latestRelease = yield utils_1.getLatestRelease(constants_1.GRAALVM_RELEASES_REPO);
+        const latestGraalVMVersion = graalvm_1.findGraalVMVersion(latestRelease);
         const selectedVersion = utils_1.toSemVer(graalVMVersion);
         const latestVersion = utils_1.toSemVer(latestGraalVMVersion);
         if (semver_1.valid(selectedVersion) &&
@@ -74697,50 +74700,48 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
     });
 };
 Object.defineProperty(exports, "__esModule", ({ value: true }));
-exports.setUpGraalVMRelease = exports.setUpGraalVMDevBuild = exports.getLatestReleaseVersion = exports.setUpGraalVMLatest = void 0;
+exports.findHighestJavaVersion = exports.setUpGraalVMRelease = exports.setUpGraalVMDevBuild = exports.findGraalVMVersion = exports.setUpGraalVMLatest = void 0;
 const c = __importStar(__nccwpck_require__(9042));
 const utils_1 = __nccwpck_require__(1314);
 const gds_1 = __nccwpck_require__(9543);
 const tool_cache_1 = __nccwpck_require__(7784);
-const GRAALVM_CE_DL_BASE = 'https://github.com/graalvm/graalvm-ce-builds/releases/download';
+const GRAALVM_CE_DL_BASE = `https://github.com/graalvm/${c.GRAALVM_RELEASES_REPO}/releases/download`;
 const GRAALVM_REPO_DEV_BUILDS = 'graalvm-ce-dev-builds';
-const GRAALVM_REPO_RELEASES = 'graalvm-ce-builds';
 const GRAALVM_TAG_PREFIX = 'vm-';
 function setUpGraalVMLatest(gdsToken, javaVersion) {
     return __awaiter(this, void 0, void 0, function* () {
         if (gdsToken.length > 0) {
             return setUpGraalVMRelease(gdsToken, c.VERSION_LATEST, javaVersion);
         }
-        const latestReleaseVersion = yield getLatestReleaseVersion();
+        const latestRelease = yield utils_1.getLatestRelease(c.GRAALVM_RELEASES_REPO);
-        return setUpGraalVMRelease(gdsToken, latestReleaseVersion, javaVersion);
+        const version = findGraalVMVersion(latestRelease);
+        return setUpGraalVMRelease(gdsToken, version, javaVersion);
     });
 }
 exports.setUpGraalVMLatest = setUpGraalVMLatest;
-function getLatestReleaseVersion() {
+function findGraalVMVersion(release) {
-    return __awaiter(this, void 0, void 0, function* () {
+    const tag_name = release.tag_name;
-        const latestRelease = yield utils_1.getLatestRelease(GRAALVM_REPO_RELEASES);
+    if (!tag_name.startsWith(GRAALVM_TAG_PREFIX)) {
-        const tag_name = latestRelease.tag_name;
-        if (tag_name.startsWith(GRAALVM_TAG_PREFIX)) {
-            return tag_name.substring(GRAALVM_TAG_PREFIX.length, tag_name.length);
-        }
         throw new Error(`Could not find latest GraalVM release: ${tag_name}`);
-    });
+    }
+    return tag_name.substring(GRAALVM_TAG_PREFIX.length, tag_name.length);
 }
-exports.getLatestReleaseVersion = getLatestReleaseVersion;
+exports.findGraalVMVersion = findGraalVMVersion;
 function setUpGraalVMDevBuild(gdsToken, javaVersion) {
     return __awaiter(this, void 0, void 0, function* () {
         if (gdsToken.length > 0) {
             throw new Error('Downloading GraalVM EE dev builds is not supported');
         }
         const latestDevBuild = yield utils_1.getLatestRelease(GRAALVM_REPO_DEV_BUILDS);
-        const graalVMIdentifier = determineGraalVMIdentifier(false, 'dev', javaVersion);
+        let resolvedJavaVersion;
-        const expectedFileName = `${graalVMIdentifier}${c.GRAALVM_FILE_EXTENSION}`;
+        if (javaVersion == c.VERSION_DEV) {
-        for (const asset of latestDevBuild.assets) {
+            resolvedJavaVersion = findHighestJavaVersion(latestDevBuild, c.VERSION_DEV);
-            if (asset.name === expectedFileName) {
-                return utils_1.downloadAndExtractJDK(asset.browser_download_url);
-            }
         }
-        throw new Error(`Could not find GraalVM dev build for Java ${javaVersion}. It may no longer be available, so please consider upgrading the Java version. If you think this is a mistake, please file an issue at: https://github.com/graalvm/setup-graalvm/issues.`);
+        else {
+            resolvedJavaVersion = javaVersion;
+        }
+        const downloadUrl = findDownloadUrl(latestDevBuild, resolvedJavaVersion);
+        return utils_1.downloadAndExtractJDK(downloadUrl);
     });
 }
 exports.setUpGraalVMDevBuild = setUpGraalVMDevBuild;
@@ -74759,6 +74760,37 @@ function setUpGraalVMRelease(gdsToken, version, javaVersion) {
     });
 }
 exports.setUpGraalVMRelease = setUpGraalVMRelease;
+function findHighestJavaVersion(release, version) {
+    const graalVMIdentifierPattern = determineGraalVMIdentifier(false, version, '(\\d+)');
+    const expectedFileNameRegExp = new RegExp(`^${graalVMIdentifierPattern}${c.GRAALVM_FILE_EXTENSION.replace(/\./g, '\\.')}$`);
+    let highestJavaVersion = 0;
+    for (const asset of release.assets) {
+        const matches = asset.name.match(expectedFileNameRegExp);
+        if (matches) {
+            const javaVersion = +matches[1];
+            if (javaVersion > highestJavaVersion) {
+                highestJavaVersion = javaVersion;
+            }
+        }
+    }
+    if (highestJavaVersion > 0) {
+        return String(highestJavaVersion);
+    }
+    else {
+        throw new Error('Could not find highest Java version. Please file an issue at: https://github.com/graalvm/setup-graalvm/issues.');
+    }
+}
+exports.findHighestJavaVersion = findHighestJavaVersion;
+function findDownloadUrl(release, javaVersion) {
+    const graalVMIdentifier = determineGraalVMIdentifier(false, c.VERSION_DEV, javaVersion);
+    const expectedFileName = `${graalVMIdentifier}${c.GRAALVM_FILE_EXTENSION}`;
+    for (const asset of release.assets) {
+        if (asset.name === expectedFileName) {
+            return asset.browser_download_url;
+        }
+    }
+    throw new Error(`Could not find GraalVM dev build for Java ${javaVersion}. It may no longer be available, so please consider upgrading the Java version. If you think this is a mistake, please file an issue at: https://github.com/graalvm/setup-graalvm/issues.`);
+}
 function determineGraalVMIdentifier(isEE, version, javaVersion) {
     return `graalvm-${isEE ? 'ee' : 'ce'}-java${javaVersion}-${c.GRAALVM_PLATFORM}-${c.GRAALVM_ARCH}-${version}`;
 }
@@ -74775,7 +74807,7 @@ function downloadGraalVMCE(version, javaVersion) {
         catch (error) {
             if (error instanceof Error && error.message.includes('404')) {
                 // Not Found
-                throw new Error(`Failed to download ${graalVMIdentifier}. Are you sure version: '${version}' and javaVersion: '${javaVersion}' are correct?`);
+                throw new Error(`Failed to download ${graalVMIdentifier}. Are you sure version: '${version}' and java-version: '${javaVersion}' are correct?`);
             }
             throw new Error(`Failed to download ${graalVMIdentifier} (error: ${error}).`);
         }

src/constants.ts

@@ -21,6 +21,7 @@ export const GRAALVM_ARCH = determineGraalVMArchitecture()
 export const GRAALVM_FILE_EXTENSION = IS_WINDOWS ? '.zip' : '.tar.gz'
 export const GRAALVM_GH_USER = 'graalvm'
 export const GRAALVM_PLATFORM = IS_WINDOWS ? 'windows' : process.platform
+export const GRAALVM_RELEASES_REPO = 'graalvm-ce-builds'
 export const JDK_HOME_SUFFIX = IS_MACOS ? '/Contents/Home' : ''
 
 export const MANDREL_NAMESPACE = 'mandrel-'

src/features/check-for-updates.ts

@@ -1,7 +1,8 @@
 import * as core from '@actions/core'
-import {toSemVer} from '../utils'
+import {getLatestRelease, toSemVer} from '../utils'
 import {lt, major, minor, valid} from 'semver'
-import {getLatestReleaseVersion} from '../graalvm'
+import {findGraalVMVersion} from '../graalvm'
+import {GRAALVM_RELEASES_REPO} from '../constants'
 
 export async function checkForUpdates(
   graalVMVersion: string,
@@ -13,7 +14,9 @@ export async function checkForUpdates(
     )
     return
   }
-  const latestGraalVMVersion = await getLatestReleaseVersion()
+
+  const latestRelease = await getLatestRelease(GRAALVM_RELEASES_REPO)
+  const latestGraalVMVersion = findGraalVMVersion(latestRelease)
   const selectedVersion = toSemVer(graalVMVersion)
   const latestVersion = toSemVer(latestGraalVMVersion)
   if (

src/graalvm.ts

@@ -7,10 +7,8 @@ import {
 import {downloadGraalVMEE} from './gds'
 import {downloadTool} from '@actions/tool-cache'
 
-const GRAALVM_CE_DL_BASE =
+const GRAALVM_CE_DL_BASE = `https://github.com/graalvm/${c.GRAALVM_RELEASES_REPO}/releases/download`
-  'https://github.com/graalvm/graalvm-ce-builds/releases/download'
 const GRAALVM_REPO_DEV_BUILDS = 'graalvm-ce-dev-builds'
-const GRAALVM_REPO_RELEASES = 'graalvm-ce-builds'
 const GRAALVM_TAG_PREFIX = 'vm-'
 
 export async function setUpGraalVMLatest(
@@ -20,17 +18,17 @@ export async function setUpGraalVMLatest(
   if (gdsToken.length > 0) {
     return setUpGraalVMRelease(gdsToken, c.VERSION_LATEST, javaVersion)
   }
-  const latestReleaseVersion = await getLatestReleaseVersion()
+  const latestRelease = await getLatestRelease(c.GRAALVM_RELEASES_REPO)
-  return setUpGraalVMRelease(gdsToken, latestReleaseVersion, javaVersion)
+  const version = findGraalVMVersion(latestRelease)
+  return setUpGraalVMRelease(gdsToken, version, javaVersion)
 }
 
-export async function getLatestReleaseVersion(): Promise<string> {
+export function findGraalVMVersion(release: c.LatestReleaseResponse['data']) {
-  const latestRelease = await getLatestRelease(GRAALVM_REPO_RELEASES)
+  const tag_name = release.tag_name
-  const tag_name = latestRelease.tag_name
+  if (!tag_name.startsWith(GRAALVM_TAG_PREFIX)) {
-  if (tag_name.startsWith(GRAALVM_TAG_PREFIX)) {
+    throw new Error(`Could not find latest GraalVM release: ${tag_name}`)
-    return tag_name.substring(GRAALVM_TAG_PREFIX.length, tag_name.length)
   }
-  throw new Error(`Could not find latest GraalVM release: ${tag_name}`)
+  return tag_name.substring(GRAALVM_TAG_PREFIX.length, tag_name.length)
 }
 
 export async function setUpGraalVMDevBuild(
@@ -41,20 +39,14 @@ export async function setUpGraalVMDevBuild(
     throw new Error('Downloading GraalVM EE dev builds is not supported')
   }
   const latestDevBuild = await getLatestRelease(GRAALVM_REPO_DEV_BUILDS)
-  const graalVMIdentifier = determineGraalVMIdentifier(
+  let resolvedJavaVersion
-    false,
+  if (javaVersion == c.VERSION_DEV) {
-    'dev',
+    resolvedJavaVersion = findHighestJavaVersion(latestDevBuild, c.VERSION_DEV)
-    javaVersion
+  } else {
-  )
+    resolvedJavaVersion = javaVersion
-  const expectedFileName = `${graalVMIdentifier}${c.GRAALVM_FILE_EXTENSION}`
-  for (const asset of latestDevBuild.assets) {
-    if (asset.name === expectedFileName) {
-      return downloadAndExtractJDK(asset.browser_download_url)
-    }
   }
-  throw new Error(
+  const downloadUrl = findDownloadUrl(latestDevBuild, resolvedJavaVersion)
-    `Could not find GraalVM dev build for Java ${javaVersion}. It may no longer be available, so please consider upgrading the Java version. If you think this is a mistake, please file an issue at: https://github.com/graalvm/setup-graalvm/issues.`
+  return downloadAndExtractJDK(downloadUrl)
-  )
 }
 
 export async function setUpGraalVMRelease(
@@ -73,6 +65,60 @@ export async function setUpGraalVMRelease(
   return downloadExtractAndCacheJDK(downloader, toolName, version)
 }
 
+export function findHighestJavaVersion(
+  release: c.LatestReleaseResponse['data'],
+  version: string
+): string {
+  const graalVMIdentifierPattern = determineGraalVMIdentifier(
+    false,
+    version,
+    '(\\d+)'
+  )
+  const expectedFileNameRegExp = new RegExp(
+    `^${graalVMIdentifierPattern}${c.GRAALVM_FILE_EXTENSION.replace(
+      /\./g,
+      '\\.'
+    )}$`
+  )
+  let highestJavaVersion = 0
+  for (const asset of release.assets) {
+    const matches = asset.name.match(expectedFileNameRegExp)
+    if (matches) {
+      const javaVersion = +matches[1]
+      if (javaVersion > highestJavaVersion) {
+        highestJavaVersion = javaVersion
+      }
+    }
+  }
+  if (highestJavaVersion > 0) {
+    return String(highestJavaVersion)
+  } else {
+    throw new Error(
+      'Could not find highest Java version. Please file an issue at: https://github.com/graalvm/setup-graalvm/issues.'
+    )
+  }
+}
+
+function findDownloadUrl(
+  release: c.LatestReleaseResponse['data'],
+  javaVersion: string
+): string {
+  const graalVMIdentifier = determineGraalVMIdentifier(
+    false,
+    c.VERSION_DEV,
+    javaVersion
+  )
+  const expectedFileName = `${graalVMIdentifier}${c.GRAALVM_FILE_EXTENSION}`
+  for (const asset of release.assets) {
+    if (asset.name === expectedFileName) {
+      return asset.browser_download_url
+    }
+  }
+  throw new Error(
+    `Could not find GraalVM dev build for Java ${javaVersion}. It may no longer be available, so please consider upgrading the Java version. If you think this is a mistake, please file an issue at: https://github.com/graalvm/setup-graalvm/issues.`
+  )
+}
+
 function determineGraalVMIdentifier(
   isEE: boolean,
   version: string,
@@ -105,7 +151,7 @@ async function downloadGraalVMCE(
     if (error instanceof Error && error.message.includes('404')) {
       // Not Found
       throw new Error(
-        `Failed to download ${graalVMIdentifier}. Are you sure version: '${version}' and javaVersion: '${javaVersion}' are correct?`
+        `Failed to download ${graalVMIdentifier}. Are you sure version: '${version}' and java-version: '${javaVersion}' are correct?`
       )
     }
     throw new Error(