Java settings by instance

app/assets/css/launcher.css

@@ -1228,6 +1228,59 @@ body, button {
     font-size: 12px;
 }
 
+/* Selected server content container */
+.settingsSelServContainer {
+    background: rgba(0, 0, 0, 0.25);
+    width: 75%;
+    border-radius: 3px;
+    display: flex;
+    justify-content: space-between;
+    margin: 15px 0px;
+}
+
+/* Div which will be populated with the selected server's information. */
+.settingsSelServContent {
+    display: flex;
+    align-items: center;
+    justify-content: flex-start;
+    padding: 5px 0px;
+}
+
+/* Wrapper container for the switch server button. */
+.settingsSwitchServerContainer {
+    display: flex;
+    align-items: center;
+    padding: 15px;
+}
+
+/* Button to switch server configurations on the mods tab. */
+.settingsSwitchServerButton {
+    opacity: 0;
+    border: 1px solid rgb(255, 255, 255);
+    color: rgb(255, 255, 255);
+    background: none;
+    font-size: 12px;
+    border-radius: 3px;
+    font-family: 'Avenir Medium';
+    transition: 0.25s ease;
+    cursor: pointer;
+    outline: none;
+}
+.settingsSwitchServerButton:hover,
+.settingsSwitchServerButton:focus {
+    box-shadow: 0px 0px 20px rgb(255, 255, 255);
+    background: rgba(255, 255, 255, 0.25);
+}
+.settingsSwitchServerButton:active {
+    box-shadow: 0px 0px 20px rgb(187, 187, 187);
+    background: rgba(187, 187, 187, 0.25);
+    border: 1px solid rgb(187, 187, 187);
+    color: rgb(187, 187, 187);
+}
+.settingsSelServContainer:hover .settingsSwitchServerButton {
+    opacity: 1;
+}
+
 /* Remove spin button from number inputs. */
 #settingsContainer input[type=number]::-webkit-inner-spin-button {
     -webkit-appearance: none;
@@ -1638,59 +1691,6 @@ input:checked + .toggleSwitchSlider:before {
 * Settings View (Mods Tab)
 * * */
 
-/* Selected server content container */
-#settingsSelServContainer {
-    background: rgba(0, 0, 0, 0.25);
-    width: 75%;
-    border-radius: 3px;
-    display: flex;
-    justify-content: space-between;
-    margin: 15px 0px;
-}
-
-/* Div which will be populated with the selected server's information. */
-#settingsSelServContent {
-    display: flex;
-    align-items: center;
-    justify-content: flex-start;
-    padding: 5px 0px;
-}
-
-/* Wrapper container for the switch server button. */
-#settingsSwitchServerContainer {
-    display: flex;
-    align-items: center;
-    padding: 15px;
-}
-
-/* Button to switch server configurations on the mods tab. */
-#settingsSwitchServerButton {
-    opacity: 0;
-    border: 1px solid rgb(255, 255, 255);
-    color: rgb(255, 255, 255);
-    background: none;
-    font-size: 12px;
-    border-radius: 3px;
-    font-family: 'Avenir Medium';
-    transition: 0.25s ease;
-    cursor: pointer;
-    outline: none;
-}
-#settingsSwitchServerButton:hover,
-#settingsSwitchServerButton:focus {
-    box-shadow: 0px 0px 20px rgb(255, 255, 255);
-    background: rgba(255, 255, 255, 0.25);
-}
-#settingsSwitchServerButton:active {
-    box-shadow: 0px 0px 20px rgb(187, 187, 187);
-    background: rgba(187, 187, 187, 0.25);
-    border: 1px solid rgb(187, 187, 187);
-    color: rgb(187, 187, 187);
-}
-#settingsSelServContainer:hover #settingsSwitchServerButton {
-    opacity: 1;
-}
-
 /* Main content container for the mod elements. */
 #settingsModsContainer {
     width: 75%;

app/assets/js/assetguard.js

@@ -5,6 +5,7 @@ const child_process = require('child_process')
 const crypto        = require('crypto')
 const EventEmitter  = require('events')
 const fs            = require('fs-extra')
+const nodeDiskInfo  = require('node-disk-info')
 const StreamZip     = require('node-stream-zip')
 const path          = require('path')
 const Registry      = require('winreg')
@@ -342,6 +343,9 @@ class JavaGuard extends EventEmitter {
      * @returns {boolean} True if the path points to a Java executable, otherwise false.
      */
     static isJavaExecPath(pth){
+        if(pth == null) {
+            return false
+        }
         if(process.platform === 'win32'){
             return pth.endsWith(path.join('bin', 'javaw.exe'))
         } else if(process.platform === 'darwin'){
@@ -459,13 +463,19 @@ class JavaGuard extends EventEmitter {
                 let verString = props[i].split('=')[1].trim()
                 console.log(props[i].trim())
                 const verOb = JavaGuard.parseJavaRuntimeVersion(verString)
+                // TODO implement a support matrix eventually. Right now this is good enough
+                // 1.7-1.16 = Java 8
+                // 1.17+ = Java 17
+                // Actual support may vary, but we're going with this rule for simplicity.
                 if(verOb.major < 9){
                     // Java 8
-                    if(verOb.major === 8 && verOb.update > 52){
-                        meta.version = verOb
-                        ++checksum
-                        if(checksum === goal){
-                            break
+                    if(!Util.mcVersionAtLeast('1.17', this.mcVersion)){
+                        if(verOb.major === 8 && verOb.update > 52){
+                            meta.version = verOb
+                            ++checksum
+                            if(checksum === goal){
+                                break
+                            }
                         }
                     }
                 } else if(verOb.major >= 16) {
@@ -804,13 +814,20 @@ class JavaGuard extends EventEmitter {
         // Get possible paths from the registry.
         let pathSet1 = await JavaGuard._scanRegistry()
         if(pathSet1.size === 0){
+
             // Do a manual file system scan of program files.
-            pathSet1 = new Set([
-                ...pathSet1,
-                ...(await JavaGuard._scanFileSystem('C:\\Program Files\\Java')),
-                ...(await JavaGuard._scanFileSystem('C:\\Program Files\\Eclipse Foundation')),
-                ...(await JavaGuard._scanFileSystem('C:\\Program Files\\AdoptOpenJDK'))
-            ])
+            // Check all drives
+            const driveMounts = nodeDiskInfo.getDiskInfoSync().map(({ mounted }) => mounted)
+            for(const mount of driveMounts) {
+                pathSet1 = new Set([
+                    ...pathSet1,
+                    ...(await JavaGuard._scanFileSystem(`${mount}\\Program Files\\Java`)),
+                    ...(await JavaGuard._scanFileSystem(`${mount}\\Program Files\\Eclipse Adoptium`)),
+                    ...(await JavaGuard._scanFileSystem(`${mount}\\Program Files\\Eclipse Foundation`)),
+                    ...(await JavaGuard._scanFileSystem(`${mount}\\Program Files\\AdoptOpenJDK`))
+                ])
+            }
+            
         }
 
         // Get possible paths from the data directory.

app/assets/js/configmanager.js

@@ -63,6 +63,27 @@ function resolveMinRAM(){
     return resolveMaxRAM()
 }
 
+/**
+ * TODO Copy pasted, should be in a utility file.
+ * 
+ * Returns true if the actual version is greater than
+ * or equal to the desired version.
+ * 
+ * @param {string} desired The desired version.
+ * @param {string} actual The actual version.
+ */
+function mcVersionAtLeast(desired, actual){
+    const des = desired.split('.')
+    const act = actual.split('.')
+
+    for(let i=0; i<des.length; i++){
+        if(!(parseInt(act[i]) >= parseInt(des[i]))){
+            return false
+        }
+    }
+    return true
+}
+
 /**
  * Three types of values:
  * Static = Explicitly declared.
@@ -71,17 +92,6 @@ function resolveMinRAM(){
  */
 const DEFAULT_CONFIG = {
     settings: {
-        java: {
-            minRAM: resolveMinRAM(),
-            maxRAM: resolveMaxRAM(), // Dynamic
-            executable: null,
-            jvmOptions: [
-                '-XX:+UseConcMarkSweepGC',
-                '-XX:+CMSIncrementalMode',
-                '-XX:-UseAdaptiveSizePolicy',
-                '-Xmn128M'
-            ],
-        },
         game: {
             resWidth: 1280,
             resHeight: 720,
@@ -103,7 +113,8 @@ const DEFAULT_CONFIG = {
     selectedServer: null, // Resolved
     selectedAccount: null,
     authenticationDatabase: {},
-    modConfigurations: []
+    modConfigurations: [],
+    javaConfig: {}
 }
 
 let config = null
@@ -177,7 +188,7 @@ function validateKeySet(srcObj, destObj){
     if(srcObj == null){
         srcObj = {}
     }
-    const validationBlacklist = ['authenticationDatabase']
+    const validationBlacklist = ['authenticationDatabase', 'javaConfig']
     const keys = Object.keys(srcObj)
     for(let i=0; i<keys.length; i++){
         if(typeof destObj[keys[i]] === 'undefined'){
@@ -511,16 +522,66 @@ exports.setModConfiguration = function(serverid, configuration){
 
 // Java Settings
 
+function defaultJavaConfig(mcVersion) {
+    if(mcVersionAtLeast('1.17', mcVersion)) {
+        return defaultJavaConfig117()
+    } else {
+        return defaultJavaConfigBelow117()
+    }
+}
+
+function defaultJavaConfigBelow117() {
+    return {
+        minRAM: resolveMinRAM(),
+        maxRAM: resolveMaxRAM(), // Dynamic
+        executable: null,
+        jvmOptions: [
+            '-XX:+UseConcMarkSweepGC',
+            '-XX:+CMSIncrementalMode',
+            '-XX:-UseAdaptiveSizePolicy',
+            '-Xmn128M'
+        ],
+    }
+}
+
+function defaultJavaConfig117() {
+    return {
+        minRAM: resolveMinRAM(),
+        maxRAM: resolveMaxRAM(), // Dynamic
+        executable: null,
+        jvmOptions: [
+            '-XX:+UnlockExperimentalVMOptions',
+            '-XX:+UseG1GC',
+            '-XX:G1NewSizePercent=20',
+            '-XX:G1ReservePercent=20',
+            '-XX:MaxGCPauseMillis=50',
+            '-XX:G1HeapRegionSize=32M'
+        ],
+    }
+}
+
+/**
+ * Ensure a java config property is set for the given server.
+ * 
+ * @param {string} serverid The server id.
+ * @param {*} mcVersion The minecraft version of the server.
+ */
+exports.ensureJavaConfig = function(serverid, mcVersion) {
+    if(!Object.prototype.hasOwnProperty.call(config.javaConfig, serverid)) {
+        config.javaConfig[serverid] = defaultJavaConfig(mcVersion)
+    }
+}
+
 /**
  * Retrieve the minimum amount of memory for JVM initialization. This value
  * contains the units of memory. For example, '5G' = 5 GigaBytes, '1024M' = 
  * 1024 MegaBytes, etc.
  * 
- * @param {boolean} def Optional. If true, the default value will be returned.
+ * @param {string} serverid The server id.
  * @returns {string} The minimum amount of memory for JVM initialization.
  */
-exports.getMinRAM = function(def = false){
-    return !def ? config.settings.java.minRAM : DEFAULT_CONFIG.settings.java.minRAM
+exports.getMinRAM = function(serverid){
+    return config.javaConfig[serverid].minRAM
 }
 
 /**
@@ -528,10 +589,11 @@ exports.getMinRAM = function(def = false){
  * contain the units of memory. For example, '5G' = 5 GigaBytes, '1024M' = 
  * 1024 MegaBytes, etc.
  * 
+ * @param {string} serverid The server id.
  * @param {string} minRAM The new minimum amount of memory for JVM initialization.
  */
-exports.setMinRAM = function(minRAM){
-    config.settings.java.minRAM = minRAM
+exports.setMinRAM = function(serverid, minRAM){
+    config.javaConfig[serverid].minRAM = minRAM
 }
 
 /**
@@ -539,11 +601,11 @@ exports.setMinRAM = function(minRAM){
  * contains the units of memory. For example, '5G' = 5 GigaBytes, '1024M' = 
  * 1024 MegaBytes, etc.
  * 
- * @param {boolean} def Optional. If true, the default value will be returned.
+ * @param {string} serverid The server id.
  * @returns {string} The maximum amount of memory for JVM initialization.
  */
-exports.getMaxRAM = function(def = false){
-    return !def ? config.settings.java.maxRAM : resolveMaxRAM()
+exports.getMaxRAM = function(serverid){
+    return config.javaConfig[serverid].maxRAM
 }
 
 /**
@@ -551,10 +613,11 @@ exports.getMaxRAM = function(def = false){
  * contain the units of memory. For example, '5G' = 5 GigaBytes, '1024M' = 
  * 1024 MegaBytes, etc.
  * 
+ * @param {string} serverid The server id.
  * @param {string} maxRAM The new maximum amount of memory for JVM initialization.
  */
-exports.setMaxRAM = function(maxRAM){
-    config.settings.java.maxRAM = maxRAM
+exports.setMaxRAM = function(serverid, maxRAM){
+    config.javaConfig[serverid].maxRAM = maxRAM
 }
 
 /**
@@ -562,19 +625,21 @@ exports.setMaxRAM = function(maxRAM){
  * 
  * This is a resolved configuration value and defaults to null until externally assigned.
  * 
+ * @param {string} serverid The server id.
  * @returns {string} The path of the Java Executable.
  */
-exports.getJavaExecutable = function(){
-    return config.settings.java.executable
+exports.getJavaExecutable = function(serverid){
+    return config.javaConfig[serverid].executable
 }
 
 /**
  * Set the path of the Java Executable.
  * 
+ * @param {string} serverid The server id.
  * @param {string} executable The new path of the Java Executable.
  */
-exports.setJavaExecutable = function(executable){
-    config.settings.java.executable = executable
+exports.setJavaExecutable = function(serverid, executable){
+    config.javaConfig[serverid].executable = executable
 }
 
 /**
@@ -582,11 +647,11 @@ exports.setJavaExecutable = function(executable){
  * such as memory allocation, will be dynamically resolved and will not be included
  * in this value.
  * 
- * @param {boolean} def Optional. If true, the default value will be returned.
+ * @param {string} serverid The server id.
  * @returns {Array.<string>} An array of the additional arguments for JVM initialization.
  */
-exports.getJVMOptions = function(def = false){
-    return !def ? config.settings.java.jvmOptions : DEFAULT_CONFIG.settings.java.jvmOptions
+exports.getJVMOptions = function(serverid){
+    return config.javaConfig[serverid].jvmOptions
 }
 
 /**
@@ -594,11 +659,12 @@ exports.getJVMOptions = function(def = false){
  * such as memory allocation, will be dynamically resolved and should not be
  * included in this value.
  * 
+ * @param {string} serverid The server id.
  * @param {Array.<string>} jvmOptions An array of the new additional arguments for JVM 
  * initialization.
  */
-exports.setJVMOptions = function(jvmOptions){
-    config.settings.java.jvmOptions = jvmOptions
+exports.setJVMOptions = function(serverid, jvmOptions){
+    config.javaConfig[serverid].jvmOptions = jvmOptions
 }
 
 // Game Settings

app/assets/js/processbuilder.js

@@ -61,7 +61,7 @@ class ProcessBuilder {
 
         logger.log('Launch Arguments:', args)
 
-        const child = child_process.spawn(ConfigManager.getJavaExecutable(), args, {
+        const child = child_process.spawn(ConfigManager.getJavaExecutable(this.server.getID()), args, {
             cwd: this.gameDir,
             detached: ConfigManager.getLaunchDetached()
         })
@@ -356,9 +356,9 @@ class ProcessBuilder {
             args.push('-Xdock:name=HeliosLauncher')
             args.push('-Xdock:icon=' + path.join(__dirname, '..', 'images', 'minecraft.icns'))
         }
-        args.push('-Xmx' + ConfigManager.getMaxRAM())
-        args.push('-Xms' + ConfigManager.getMinRAM())
-        args = args.concat(ConfigManager.getJVMOptions())
+        args.push('-Xmx' + ConfigManager.getMaxRAM(this.server.getID()))
+        args.push('-Xms' + ConfigManager.getMinRAM(this.server.getID()))
+        args = args.concat(ConfigManager.getJVMOptions(this.server.getID()))
         args.push('-Djava.library.path=' + tempNativePath)
 
         // Main Java Class
@@ -407,9 +407,9 @@ class ProcessBuilder {
             args.push('-Xdock:name=HeliosLauncher')
             args.push('-Xdock:icon=' + path.join(__dirname, '..', 'images', 'minecraft.icns'))
         }
-        args.push('-Xmx' + ConfigManager.getMaxRAM())
-        args.push('-Xms' + ConfigManager.getMinRAM())
-        args = args.concat(ConfigManager.getJVMOptions())
+        args.push('-Xmx' + ConfigManager.getMaxRAM(this.server.getID()))
+        args.push('-Xms' + ConfigManager.getMinRAM(this.server.getID()))
+        args = args.concat(ConfigManager.getJVMOptions(this.server.getID()))
 
         // Main Java Class
         args.push(this.forgeData.mainClass)

app/assets/js/scripts/landing.js

@@ -87,7 +87,7 @@ function setLaunchEnabled(val){
 document.getElementById('launch_button').addEventListener('click', function(e){
     loggerLanding.log('Launching game..')
     const mcVersion = DistroManager.getDistribution().getServer(ConfigManager.getSelectedServer()).getMinecraftVersion()
-    const jExe = ConfigManager.getJavaExecutable()
+    const jExe = ConfigManager.getJavaExecutable(ConfigManager.getSelectedServer())
     if(jExe == null){
         asyncSystemScan(mcVersion)
     } else {
@@ -140,13 +140,13 @@ updateSelectedAccount(ConfigManager.getSelectedAccount())
 // Bind selected server
 function updateSelectedServer(serv){
     if(getCurrentView() === VIEWS.settings){
-        saveAllModConfigurations()
+        fullSettingsSave()
     }
     ConfigManager.setSelectedServer(serv != null ? serv.getID() : null)
     ConfigManager.save()
     server_selection_button.innerHTML = '\u2022 ' + (serv != null ? serv.getName() : 'No Server Selected')
     if(getCurrentView() === VIEWS.settings){
-        animateModsTabRefresh()
+        animateSettingsTabRefresh()
     }
     setLaunchEnabled(serv != null)
 }
@@ -332,7 +332,7 @@ function asyncSystemScan(mcVersion, launchAfter = true){
                 )
                 setOverlayHandler(() => {
                     setLaunchDetails('Preparing Java Download..')
-                    sysAEx.send({task: 'changeContext', class: 'AssetGuard', args: [ConfigManager.getCommonDirectory(),ConfigManager.getJavaExecutable()]})
+                    sysAEx.send({task: 'changeContext', class: 'AssetGuard', args: [ConfigManager.getCommonDirectory(),ConfigManager.getJavaExecutable(ConfigManager.getSelectedServer())]})
                     sysAEx.send({task: 'execute', function: '_enqueueOpenJDK', argsArr: [ConfigManager.getDataDirectory()]})
                     toggleOverlay(false)
                 })
@@ -360,7 +360,7 @@ function asyncSystemScan(mcVersion, launchAfter = true){
 
             } else {
                 // Java installation found, use this to launch the game.
-                ConfigManager.setJavaExecutable(m.result)
+                ConfigManager.setJavaExecutable(ConfigManager.getSelectedServer(), m.result)
                 ConfigManager.save()
 
                 // We need to make sure that the updated value is on the settings UI.
@@ -434,7 +434,7 @@ function asyncSystemScan(mcVersion, launchAfter = true){
                     remote.getCurrentWindow().setProgressBar(-1)
 
                     // Extraction completed successfully.
-                    ConfigManager.setJavaExecutable(m.args[0])
+                    ConfigManager.setJavaExecutable(ConfigManager.getSelectedServer(), m.args[0])
                     ConfigManager.save()
 
                     if(extractListener != null){
@@ -506,7 +506,7 @@ function dlAsync(login = true){
     aEx = cp.fork(path.join(__dirname, 'assets', 'js', 'assetexec.js'), [
         'AssetGuard',
         ConfigManager.getCommonDirectory(),
-        ConfigManager.getJavaExecutable()
+        ConfigManager.getJavaExecutable(ConfigManager.getSelectedServer())
     ], {
         env: forkEnv,
         stdio: 'pipe'

app/assets/js/scripts/settings.js

@@ -2,7 +2,7 @@
 const os     = require('os')
 const semver = require('semver')
 
-const { JavaGuard } = require('./assets/js/assetguard')
+const { JavaGuard, Util } = require('./assets/js/assetguard')
 const DropinModUtil  = require('./assets/js/dropinmodutil')
 const { MSFT_OPCODE, MSFT_REPLY_TYPE, MSFT_ERROR } = require('./assets/js/ipcconstants')
 
@@ -127,29 +127,34 @@ function initSettingsValues(){
     const sEls = document.getElementById('settingsContainer').querySelectorAll('[cValue]')
     Array.from(sEls).map((v, index, arr) => {
         const cVal = v.getAttribute('cValue')
+        const serverDependent = v.hasAttribute('serverDependent') // Means the first argument is the server id.
         const gFn = ConfigManager['get' + cVal]
+        const gFnOpts = []
+        if(serverDependent) {
+            gFnOpts.push(ConfigManager.getSelectedServer())
+        }
         if(typeof gFn === 'function'){
             if(v.tagName === 'INPUT'){
                 if(v.type === 'number' || v.type === 'text'){
                     // Special Conditions
                     if(cVal === 'JavaExecutable'){
                         populateJavaExecDetails(v.value)
-                        v.value = gFn()
+                        v.value = gFn.apply(null, gFnOpts)
                     } else if (cVal === 'DataDirectory'){
-                        v.value = gFn()
+                        v.value = gFn.apply(null, gFnOpts)
                     } else if(cVal === 'JVMOptions'){
-                        v.value = gFn().join(' ')
+                        v.value = gFn.apply(null, gFnOpts).join(' ')
                     } else {
-                        v.value = gFn()
+                        v.value = gFn.apply(null, gFnOpts)
                     }
                 } else if(v.type === 'checkbox'){
-                    v.checked = gFn()
+                    v.checked = gFn.apply(null, gFnOpts)
                 }
             } else if(v.tagName === 'DIV'){
                 if(v.classList.contains('rangeSlider')){
                     // Special Conditions
                     if(cVal === 'MinRAM' || cVal === 'MaxRAM'){
-                        let val = gFn()
+                        let val = gFn.apply(null, gFnOpts)
                         if(val.endsWith('M')){
                             val = Number(val.substring(0, val.length-1))/1000
                         } else {
@@ -158,7 +163,7 @@ function initSettingsValues(){
 
                         v.setAttribute('value', val)
                     } else {
-                        v.setAttribute('value', Number.parseFloat(gFn()))
+                        v.setAttribute('value', Number.parseFloat(gFn.apply(null, gFnOpts)))
                     }
                 }
             }
@@ -174,22 +179,31 @@ function saveSettingsValues(){
     const sEls = document.getElementById('settingsContainer').querySelectorAll('[cValue]')
     Array.from(sEls).map((v, index, arr) => {
         const cVal = v.getAttribute('cValue')
+        const serverDependent = v.hasAttribute('serverDependent') // Means the first argument is the server id.
         const sFn = ConfigManager['set' + cVal]
+        const sFnOpts = []
+        if(serverDependent) {
+            sFnOpts.push(ConfigManager.getSelectedServer())
+        }
         if(typeof sFn === 'function'){
             if(v.tagName === 'INPUT'){
                 if(v.type === 'number' || v.type === 'text'){
                     // Special Conditions
                     if(cVal === 'JVMOptions'){
                         if(!v.value.trim()) {
-                            sFn([])
+                            sFnOpts.push([])
+                            sFn.apply(null, sFnOpts)
                         } else {
-                            sFn(v.value.trim().split(/\s+/))
+                            sFnOpts.push(v.value.trim().split(/\s+/))
+                            sFn.apply(null, sFnOpts)
                         }
                     } else {
-                        sFn(v.value)
+                        sFnOpts.push(v.value)
+                        sFn.apply(null, sFnOpts)
                     }
                 } else if(v.type === 'checkbox'){
-                    sFn(v.checked)
+                    sFnOpts.push(v.checked)
+                    sFn.apply(null, sFnOpts)
                     // Special Conditions
                     if(cVal === 'AllowPrerelease'){
                         changeAllowPrerelease(v.checked)
@@ -206,9 +220,11 @@ function saveSettingsValues(){
                             val = val + 'G'
                         }
 
-                        sFn(val)
+                        sFnOpts.push(val)
+                        sFn.apply(null, sFnOpts)
                     } else {
-                        sFn(v.getAttribute('value'))
+                        sFnOpts.push(v.getAttribute('value'))
+                        sFn.apply(null, sFnOpts)
                     }
                 }
             }
@@ -305,13 +321,17 @@ function settingsSaveDisabled(v){
     settingsNavDone.disabled = v
 }
 
-/* Closes the settings view and saves all data. */
-settingsNavDone.onclick = () => {
+function fullSettingsSave() {
     saveSettingsValues()
     saveModConfiguration()
     ConfigManager.save()
     saveDropinModConfiguration()
     saveShaderpackSettings()
+}
+
+/* Closes the settings view and saves all data. */
+settingsNavDone.onclick = () => {
+    fullSettingsSave()
     switchView(getCurrentView(), VIEWS.landing)
 }
 
@@ -1056,33 +1076,37 @@ function bindShaderpackButton() {
 function loadSelectedServerOnModsTab(){
     const serv = DistroManager.getDistribution().getServer(ConfigManager.getSelectedServer())
 
-    document.getElementById('settingsSelServContent').innerHTML = `
-        <img class="serverListingImg" src="${serv.getIcon()}"/>
-        <div class="serverListingDetails">
-            <span class="serverListingName">${serv.getName()}</span>
-            <span class="serverListingDescription">${serv.getDescription()}</span>
-            <div class="serverListingInfo">
-                <div class="serverListingVersion">${serv.getMinecraftVersion()}</div>
-                <div class="serverListingRevision">${serv.getVersion()}</div>
-                ${serv.isMainServer() ? `<div class="serverListingStarWrapper">
-                    <svg id="Layer_1" viewBox="0 0 107.45 104.74" width="20px" height="20px">
-                        <defs>
-                            <style>.cls-1{fill:#fff;}.cls-2{fill:none;stroke:#fff;stroke-miterlimit:10;}</style>
-                        </defs>
-                        <path class="cls-1" d="M100.93,65.54C89,62,68.18,55.65,63.54,52.13c2.7-5.23,18.8-19.2,28-27.55C81.36,31.74,63.74,43.87,58.09,45.3c-2.41-5.37-3.61-26.52-4.37-39-.77,12.46-2,33.64-4.36,39-5.7-1.46-23.3-13.57-33.49-20.72,9.26,8.37,25.39,22.36,28,27.55C39.21,55.68,18.47,62,6.52,65.55c12.32-2,33.63-6.06,39.34-4.9-.16,5.87-8.41,26.16-13.11,37.69,6.1-10.89,16.52-30.16,21-33.9,4.5,3.79,14.93,23.09,21,34C70,86.84,61.73,66.48,61.59,60.65,67.36,59.49,88.64,63.52,100.93,65.54Z"/>
-                        <circle class="cls-2" cx="53.73" cy="53.9" r="38"/>
-                    </svg>
-                    <span class="serverListingStarTooltip">Main Server</span>
-                </div>` : ''}
+    for(const el of document.getElementsByClassName('settingsSelServContent')) {
+        el.innerHTML = `
+            <img class="serverListingImg" src="${serv.getIcon()}"/>
+            <div class="serverListingDetails">
+                <span class="serverListingName">${serv.getName()}</span>
+                <span class="serverListingDescription">${serv.getDescription()}</span>
+                <div class="serverListingInfo">
+                    <div class="serverListingVersion">${serv.getMinecraftVersion()}</div>
+                    <div class="serverListingRevision">${serv.getVersion()}</div>
+                    ${serv.isMainServer() ? `<div class="serverListingStarWrapper">
+                        <svg id="Layer_1" viewBox="0 0 107.45 104.74" width="20px" height="20px">
+                            <defs>
+                                <style>.cls-1{fill:#fff;}.cls-2{fill:none;stroke:#fff;stroke-miterlimit:10;}</style>
+                            </defs>
+                            <path class="cls-1" d="M100.93,65.54C89,62,68.18,55.65,63.54,52.13c2.7-5.23,18.8-19.2,28-27.55C81.36,31.74,63.74,43.87,58.09,45.3c-2.41-5.37-3.61-26.52-4.37-39-.77,12.46-2,33.64-4.36,39-5.7-1.46-23.3-13.57-33.49-20.72,9.26,8.37,25.39,22.36,28,27.55C39.21,55.68,18.47,62,6.52,65.55c12.32-2,33.63-6.06,39.34-4.9-.16,5.87-8.41,26.16-13.11,37.69,6.1-10.89,16.52-30.16,21-33.9,4.5,3.79,14.93,23.09,21,34C70,86.84,61.73,66.48,61.59,60.65,67.36,59.49,88.64,63.52,100.93,65.54Z"/>
+                            <circle class="cls-2" cx="53.73" cy="53.9" r="38"/>
+                        </svg>
+                        <span class="serverListingStarTooltip">Main Server</span>
+                    </div>` : ''}
+                </div>
             </div>
-        </div>
-    `
+        `
+    }
 }
 
 // Bind functionality to the server switch button.
-document.getElementById('settingsSwitchServerButton').addEventListener('click', (e) => {
-    e.target.blur()
-    toggleServerSelection(true)
+Array.from(document.getElementsByClassName('settingsSwitchServerButton')).forEach(el => {
+    el.addEventListener('click', (e) => {
+        e.target.blur()
+        toggleServerSelection(true)
+    })
 })
 
 /**
@@ -1095,13 +1119,13 @@ function saveAllModConfigurations(){
 }
 
 /**
- * Function to refresh the mods tab whenever the selected
+ * Function to refresh the current tab whenever the selected
  * server is changed.
  */
-function animateModsTabRefresh(){
-    $('#settingsTabMods').fadeOut(500, () => {
-        prepareModsTab()
-        $('#settingsTabMods').fadeIn(500)
+function animateSettingsTabRefresh(){
+    $(`#${selectedSettingsTab}`).fadeOut(500, () => {
+        prepareSettings()
+        $(`#${selectedSettingsTab}`).fadeIn(500)
     })
 }
 
@@ -1131,6 +1155,7 @@ const settingsMinRAMLabel     = document.getElementById('settingsMinRAMLabel')
 const settingsMemoryTotal     = document.getElementById('settingsMemoryTotal')
 const settingsMemoryAvail     = document.getElementById('settingsMemoryAvail')
 const settingsJavaExecDetails = document.getElementById('settingsJavaExecDetails')
+const settingsJavaReqDesc     = document.getElementById('settingsJavaReqDesc')
 
 // Store maximum memory values.
 const SETTINGS_MAX_MEMORY = ConfigManager.getAbsoluteMaxRAM()
@@ -1338,12 +1363,24 @@ function populateJavaExecDetails(execPath){
     })
 }
 
+function populateJavaReqDesc() {
+    const mcVer = DistroManager.getDistribution().getServer(ConfigManager.getSelectedServer()).getMinecraftVersion()
+    if(Util.mcVersionAtLeast('1.17', mcVer)) {
+        settingsJavaReqDesc.innerHTML = 'Requires Java 17 x64.'
+    } else {
+        settingsJavaReqDesc.innerHTML = 'Requires Java 8 x64.'
+    }
+    
+}
+
 /**
  * Prepare the Java tab for display.
  */
 function prepareJavaTab(){
     bindRangeSlider()
     populateMemoryStatus()
+    populateJavaReqDesc()
+    populateJavaExecDetails()
 }
 
 /**

app/assets/js/scripts/uibinder.js

@@ -137,6 +137,7 @@ function onDistroRefresh(data){
     refreshServerStatus()
     initNews()
     syncModConfigurations(data)
+    ensureJavaSettings(data)
 }
 
 /**
@@ -223,6 +224,21 @@ function syncModConfigurations(data){
     ConfigManager.save()
 }
 
+/**
+ * Ensure java configurations are present for the available servers.
+ * 
+ * @param {Object} data The distro index object.
+ */
+function ensureJavaSettings(data) {
+
+    // Nothing too fancy for now.
+    for(const serv of data.getServers()){
+        ConfigManager.ensureJavaConfig(serv.getID(), serv.getMinecraftVersion())
+    }
+
+    ConfigManager.save()
+}
+
 /**
  * Recursively scan for optional sub modules. If none are found,
  * this function returns a boolean. If optional sub modules do exist,
@@ -434,6 +450,7 @@ ipcRenderer.on('distributionIndexDone', (event, res) => {
     if(res) {
         const data = DistroManager.getDistribution()
         syncModConfigurations(data)
+        ensureJavaSettings(data)
         if(document.readyState === 'interactive' || document.readyState === 'complete'){
             showMainUI(data)
         } else {
@@ -448,3 +465,13 @@ ipcRenderer.on('distributionIndexDone', (event, res) => {
         }
     }
 })
+
+// Util for development
+function devModeToggle() {
+    DistroManager.setDevMode(true)
+    DistroManager.pullLocal().then((data) => {
+        ensureJavaSettings(data)
+        updateSelectedServer(data.getServers()[0])
+        syncModConfigurations(data)
+    })
+}

app/settings.ejs

@@ -122,13 +122,13 @@
                 <span class="settingsTabHeaderText">Mod Settings</span>
                 <span class="settingsTabHeaderDesc">Enable or disable mods.</span>
             </div>
-            <div id="settingsSelServContainer">
-                <div id="settingsSelServContent">
+            <div class="settingsSelServContainer">
+                <div class="settingsSelServContent">
 
                 </div>
-                <div id="settingsSwitchServerContainer">
-                    <div id="settingsSwitchServerContent">
-                        <button id="settingsSwitchServerButton">Switch</button>
+                <div class="settingsSwitchServerContainer">
+                    <div class="settingsSwitchServerContent">
+                        <button class="settingsSwitchServerButton">Switch</button>
                     </div>
                 </div>
             </div>
@@ -172,6 +172,16 @@
                 <span class="settingsTabHeaderText">Java Settings</span>
                 <span class="settingsTabHeaderDesc">Manage the Java configuration (advanced).</span>
             </div>
+            <div class="settingsSelServContainer">
+                <div class="settingsSelServContent">
+
+                </div>
+                <div class="settingsSwitchServerContainer">
+                    <div class="settingsSwitchServerContent">
+                        <button class="settingsSwitchServerButton">Switch</button>
+                    </div>
+                </div>
+            </div>
             <div id="settingsMemoryContainer">
                 <div id="settingsMemoryTitle">Memory</div>
                 <div id="settingsMemoryContent">
@@ -179,7 +189,7 @@
                         <div class="settingsMemoryContentItem">
                             <span class="settingsMemoryHeader">Maximum RAM</span>
                             <div class="settingsMemoryActionContainer">
-                                <div id="settingsMaxRAMRange" class="rangeSlider" cValue="MaxRAM" min="3" max="8" value="3" step="0.5">
+                                <div id="settingsMaxRAMRange" class="rangeSlider" cValue="MaxRAM" serverDependent min="3" max="8" value="3" step="0.5">
                                     <div class="rangeSliderBar"></div>
                                     <div class="rangeSliderTrack"></div>
                                 </div>
@@ -189,7 +199,7 @@
                         <div class="settingsMemoryContentItem">
                             <span class="settingsMemoryHeader">Minimum RAM</span>
                             <div class="settingsMemoryActionContainer">
-                                <div id="settingsMinRAMRange" class="rangeSlider" cValue="MinRAM" min="3" max="8" value="3" step="0.5">
+                                <div id="settingsMinRAMRange" class="rangeSlider" cValue="MinRAM" serverDependent min="3" max="8" value="3" step="0.5">
                                     <div class="rangeSliderBar"></div>
                                     <div class="rangeSliderTrack"></div>
                                 </div>
@@ -231,11 +241,11 @@
                                 </g>
                             </svg>
                         </div>
-                        <input class="settingsFileSelVal" id="settingsJavaExecVal" type="text" value="null" cValue="JavaExecutable" disabled>
+                        <input class="settingsFileSelVal" id="settingsJavaExecVal" type="text" value="null" cValue="JavaExecutable" serverDependent disabled>
                         <button class="settingsFileSelButton" id="settingsJavaExecSel" dialogTitle="Select Java Executable" dialogDirectory="false">Choose File</button>
                     </div>
                 </div>
-                <div class="settingsFileSelDesc">The Java executable is validated before game launch. <strong>Requires Java 8 x64.</strong><br>The path should end with <strong>bin<%= process.platform === 'win32' ? '\\javaw.exe' : '/java' %></strong>.</div>
+                <div class="settingsFileSelDesc">The Java executable is validated before game launch. <strong id="settingsJavaReqDesc">Requires Java 8 x64.</strong><br>The path should end with <strong>bin<%= process.platform === 'win32' ? '\\javaw.exe' : '/java' %></strong>.</div>
             </div>
             <div id="settingsJVMOptsContainer">
                 <div id="settingsJVMOptsTitle">Additional JVM Options</div>
@@ -254,7 +264,7 @@
                             </g>
                         </svg>
                     </div>
-                    <input id="settingsJVMOptsVal" cValue="JVMOptions" type="text">
+                    <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>

package-lock.json

@@ -21,6 +21,7 @@
         "got": "^11.8.5",
         "helios-core": "~0.1.2",
         "jquery": "^3.6.1",
+        "node-disk-info": "^1.3.0",
         "node-stream-zip": "^1.15.0",
         "request": "^2.88.2",
         "semver": "^7.3.8",
@@ -2439,7 +2440,6 @@
       "version": "0.6.3",
       "resolved": "https://registry.npmjs.org/iconv-lite/-/iconv-lite-0.6.3.tgz",
       "integrity": "sha512-4fCk79wshMdzMp2rH06qWrJE4iolqLhCUH+OiuIgU++RB0+94NlDL81atO7GX55uUKueo0txHNtvEyI6D7WdMw==",
-      "dev": true,
       "dependencies": {
         "safer-buffer": ">= 2.1.2 < 3.0.0"
       },
@@ -2973,6 +2973,17 @@
       "dev": true,
       "optional": true
     },
+    "node_modules/node-disk-info": {
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/node-disk-info/-/node-disk-info-1.3.0.tgz",
+      "integrity": "sha512-NEx858vJZ0AoBtmD/ChBIHLjFTF28xCsDIgmFl4jtGKsvlUx9DU/OrMDjvj3qp/E4hzLN0HvTg7eJx5XFQvbeg==",
+      "dependencies": {
+        "iconv-lite": "^0.6.2"
+      },
+      "engines": {
+        "node": ">= 12"
+      }
+    },
     "node_modules/node-fetch": {
       "version": "2.6.7",
       "resolved": "https://registry.npmjs.org/node-fetch/-/node-fetch-2.6.7.tgz",
@@ -6107,7 +6118,6 @@
       "version": "0.6.3",
       "resolved": "https://registry.npmjs.org/iconv-lite/-/iconv-lite-0.6.3.tgz",
       "integrity": "sha512-4fCk79wshMdzMp2rH06qWrJE4iolqLhCUH+OiuIgU++RB0+94NlDL81atO7GX55uUKueo0txHNtvEyI6D7WdMw==",
-      "dev": true,
       "requires": {
         "safer-buffer": ">= 2.1.2 < 3.0.0"
       }
@@ -6510,6 +6520,14 @@
       "dev": true,
       "optional": true
     },
+    "node-disk-info": {
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/node-disk-info/-/node-disk-info-1.3.0.tgz",
+      "integrity": "sha512-NEx858vJZ0AoBtmD/ChBIHLjFTF28xCsDIgmFl4jtGKsvlUx9DU/OrMDjvj3qp/E4hzLN0HvTg7eJx5XFQvbeg==",
+      "requires": {
+        "iconv-lite": "^0.6.2"
+      }
+    },
     "node-fetch": {
       "version": "2.6.7",
       "resolved": "https://registry.npmjs.org/node-fetch/-/node-fetch-2.6.7.tgz",

package.json

@@ -35,6 +35,7 @@
     "got": "^11.8.5",
     "helios-core": "~0.1.2",
     "jquery": "^3.6.1",
+    "node-disk-info": "^1.3.0",
     "node-stream-zip": "^1.15.0",
     "request": "^2.88.2",
     "semver": "^7.3.8",