Fix auto download of jdk 17.

app/assets/js/assetguard.js

@@ -478,8 +478,7 @@ class JavaGuard extends EventEmitter {
                             }
                         }
                     }
-                } else if(verOb.major >= 16) {
+                } else if(verOb.major >= 17) {
-                    // TODO Make this logic better. Make java 16 required.
                     // Java 9+
                     if(Util.mcVersionAtLeast('1.17', this.mcVersion)){
                         meta.version = verOb
@@ -1559,9 +1558,10 @@ class AssetGuard extends EventEmitter {
     // Java (Category=''') Validation (download) Functions
     // #region
 
-    _enqueueOpenJDK(dataDir){
+    _enqueueOpenJDK(dataDir, mcVersion){
         return new Promise((resolve, reject) => {
-            JavaGuard._latestOpenJDK('8').then(verData => {
+            const major = Util.mcVersionAtLeast('1.17', mcVersion) ? '17' : '8'
+            JavaGuard._latestOpenJDK(major).then(verData => {
                 if(verData != null){
 
                     dataDir = path.join(dataDir, 'runtime', 'x64')

app/assets/js/scripts/landing.js

@@ -10,6 +10,7 @@ const { MojangRestAPI, getServerStatus }     = require('helios-core/mojang')
 // Internal Requirements
 const DiscordWrapper          = require('./assets/js/discordwrapper')
 const ProcessBuilder          = require('./assets/js/processbuilder')
+const { Util } = require('./assets/js/assetguard')
 const { RestResponseStatus, isDisplayableError } = require('helios-core/common')
 
 // Launch Elements
@@ -317,6 +318,8 @@ function asyncSystemScan(mcVersion, launchAfter = true){
     sysAEx.stdio[2].on('data', (data) => {
         loggerSysAEx.log(data)
     })
+
+    const javaVer = Util.mcVersionAtLeast('1.17', mcVersion) ? '17' : '8'
     
     sysAEx.on('message', (m) => {
 
@@ -326,14 +329,14 @@ function asyncSystemScan(mcVersion, launchAfter = true){
                 // Show this information to the user.
                 setOverlayContent(
                     'No Compatible<br>Java Installation Found',
-                    'In order to join WesterosCraft, you need a 64-bit installation of Java 8. Would you like us to install a copy?',
+                    `In order to join WesterosCraft, you need a 64-bit installation of Java ${javaVer}. Would you like us to install a copy?`,
                     'Install Java',
                     'Install Manually'
                 )
                 setOverlayHandler(() => {
                     setLaunchDetails('Preparing Java Download..')
                     sysAEx.send({task: 'changeContext', class: 'AssetGuard', args: [ConfigManager.getCommonDirectory(),ConfigManager.getJavaExecutable(ConfigManager.getSelectedServer())]})
-                    sysAEx.send({task: 'execute', function: '_enqueueOpenJDK', argsArr: [ConfigManager.getDataDirectory()]})
+                    sysAEx.send({task: 'execute', function: '_enqueueOpenJDK', argsArr: [ConfigManager.getDataDirectory(), mcVersion]})
                     toggleOverlay(false)
                 })
                 setDismissHandler(() => {
@@ -341,7 +344,7 @@ function asyncSystemScan(mcVersion, launchAfter = true){
                         //$('#overlayDismiss').toggle(false)
                         setOverlayContent(
                             'Java is Required<br>to Launch',
-                            'A valid x64 installation of Java 8 is required to launch.<br><br>Please refer to our <a href="https://github.com/dscalzi/HeliosLauncher/wiki/Java-Management#manually-installing-a-valid-version-of-java">Java Management Guide</a> for instructions on how to manually install Java.',
+                            `A valid x64 installation of Java ${javaVer} is required to launch.<br><br>Please refer to our <a href="https://github.com/dscalzi/HeliosLauncher/wiki/Java-Management#manually-installing-a-valid-version-of-java">Java Management Guide</a> for instructions on how to manually install Java.`,
                             'I Understand',
                             'Go Back'
                         )

app/assets/js/scripts/settings.js

@@ -2,7 +2,7 @@
 const os     = require('os')
 const semver = require('semver')
 
-const { JavaGuard, Util } = require('./assets/js/assetguard')
+const { JavaGuard } = require('./assets/js/assetguard')
 const DropinModUtil  = require('./assets/js/dropinmodutil')
 const { MSFT_OPCODE, MSFT_REPLY_TYPE, MSFT_ERROR } = require('./assets/js/ipcconstants')
 
@@ -1156,6 +1156,7 @@ const settingsMemoryTotal     = document.getElementById('settingsMemoryTotal')
 const settingsMemoryAvail     = document.getElementById('settingsMemoryAvail')
 const settingsJavaExecDetails = document.getElementById('settingsJavaExecDetails')
 const settingsJavaReqDesc     = document.getElementById('settingsJavaReqDesc')
+const settingsJvmOptsLink     = document.getElementById('settingsJvmOptsLink')
 
 // Store maximum memory values.
 const SETTINGS_MAX_MEMORY = ConfigManager.getAbsoluteMaxRAM()
@@ -1370,7 +1371,17 @@ function populateJavaReqDesc() {
     } else {
         settingsJavaReqDesc.innerHTML = 'Requires Java 8 x64.'
     }
-    
+}
+
+function populateJvmOptsLink() {
+    const mcVer = DistroManager.getDistribution().getServer(ConfigManager.getSelectedServer()).getMinecraftVersion()
+    if(Util.mcVersionAtLeast('1.17', mcVer)) {
+        settingsJvmOptsLink.innerHTML = 'Available Options for Java 17 (HotSpot VM)'
+        settingsJvmOptsLink.href = 'https://docs.oracle.com/en/java/javase/17/docs/specs/man/java.html#extra-options-for-java'
+    } else {
+        settingsJvmOptsLink.innerHTML = 'Available Options for Java 8 (HotSpot VM)'
+        settingsJvmOptsLink.href = `https://docs.oracle.com/javase/8/docs/technotes/tools/${process.platform === 'win32' ? 'windows' : 'unix'}/java.html`
+    }
 }
 
 /**
@@ -1380,6 +1391,7 @@ function prepareJavaTab(){
     bindRangeSlider()
     populateMemoryStatus()
     populateJavaReqDesc()
+    populateJvmOptsLink()
 }
 
 /**

app/settings.ejs

@@ -266,7 +266,7 @@
                     </div>
                     <input id="settingsJVMOptsVal" cValue="JVMOptions" serverDependent type="text">
                 </div>
-                <div id="settingsJVMOptsDesc">Options to be provided to the JVM at runtime. <em>-Xms</em> and <em>-Xmx</em> should not be included.<br><a href="https://docs.oracle.com/javase/8/docs/technotes/tools/<%= process.platform === 'win32' ? 'windows' : 'unix' %>/java.html">Available Options for Java 8</a>.</div>
+                <div id="settingsJVMOptsDesc">Options to be provided to the JVM at runtime. <em>-Xms</em> and <em>-Xmx</em> should not be included.<br><a href="https://docs.oracle.com/javase/8/docs/technotes/tools/<%= process.platform === 'win32' ? 'windows' : 'unix' %>/java.html" id="settingsJvmOptsLink">Available Options for Java 8</a>.</div>
             </div>
         </div>
         <div id="settingsTabLauncher" class="settingsTab" style="display: none;">