Fix installer failing to install on the vanilla launcher.

Author: Fox2Code

loader/src/main/java/com/fox2code/foxloader/installer/InstallerDependencyHelperImpl.java

@@ -0,0 +1,49 @@
+/*
+ * MIT License
+ * 
+ * Copyright (c) 2023-2025 Fox2Code
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.fox2code.foxloader.installer;
+
+import com.fox2code.foxloader.dependencies.DependencyHelper;
+
+import java.net.URL;
+
+final class InstallerDependencyHelperImpl extends DependencyHelper.DependencyImpl {
+    static final InstallerDependencyHelperImpl INSTANCE = new InstallerDependencyHelperImpl();
+
+    @Override
+    public boolean hasClass(String cls) {
+        return InstallerDependencyHelperImpl.class.getClassLoader()
+                .getResource(cls.replace('.', '/') + ".class") != null;
+    }
+
+    @Override
+    public boolean isDev() {
+        return true;
+    }
+
+    @Override
+    public URL getClassResource(String className) {
+        return InstallerDependencyHelperImpl.class.getClassLoader()
+                .getResource(className.replace('.', '/') + ".class");
+    }
+}

loader/src/main/java/com/fox2code/foxloader/installer/InstallerGUI.java

@@ -28,6 +28,7 @@
 import com.fox2code.foxloader.launcher.LauncherType;
 import com.fox2code.foxloader.utils.Platform;
 import com.fox2code.foxloader.utils.StackTraceStringifier;
+import com.fox2code.foxloader.utils.io.CertificateHelper;
 import com.fox2code.foxloader.utils.io.IOUtils;
 
 import javax.swing.*;
@@ -74,6 +75,9 @@ final class InstallerGUI {
     private final String versionName;
 
     public InstallerGUI(InstallerPlatform installerPlatform) {
+        DependencyHelper.DependencyImpl.install(InstallerDependencyHelperImpl.INSTANCE);
+        DependencyHelper.setMCLibraryRoot(new File(Platform.getAppDir("minecraft"), "libraries"));
+        CertificateHelper.initializeSafe();
         this.installerPlatform = installerPlatform;
         this.launcherType = null;
         versionName = DEFAULT_VERSION_NAME;