Use a better way to determine the installer version.

Author: ZekerZhayard

gradle.properties

@@ -1,4 +1,4 @@
 
 org.gradle.daemon = false
 
-fw_version = 1.5.4
+fw_version = 1.5.5

gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.3.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.3.3-all.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

src/main/java/io/github/zekerzhayard/forgewrapper/installer/Installer.java

@@ -1,18 +1,18 @@
 package io.github.zekerzhayard.forgewrapper.installer;
 
 import java.io.File;
-import java.lang.reflect.Method;
 
 import io.github.zekerzhayard.forgewrapper.installer.util.AbstractInstaller;
 import io.github.zekerzhayard.forgewrapper.installer.util.InstallerV0;
 import io.github.zekerzhayard.forgewrapper.installer.util.InstallerV1;
 import net.minecraftforge.installer.actions.ProgressCallback;
 import net.minecraftforge.installer.json.Install;
+import net.minecraftforge.installer.json.InstallV1;
 import net.minecraftforge.installer.json.Util;
 
 public class Installer {
-    public static boolean install(File libraryDir, File minecraftJar, File installerJar, int installerSpec) {
-        AbstractInstaller installer = getInstaller(installerSpec);
+    public static boolean install(File libraryDir, File minecraftJar, File installerJar) {
+        AbstractInstaller installer = createInstaller();
         ProgressCallback monitor = ProgressCallback.withOutputs(System.out);
         Install profile = installer.loadInstallProfile();
         if (System.getProperty("java.net.preferIPv4Stack") == null) {
@@ -26,22 +26,18 @@ public static boolean install(File libraryDir, File minecraftJar, File installer
         return installer.runClientInstall(profile, monitor, libraryDir, minecraftJar, installerJar);
     }
 
-    private static AbstractInstaller getInstaller(int installerSpec) {
-        switch (installerSpec) {
-            case 0: {
-                Boolean isV1 = false;
-                Method[] methods = Util.class.getDeclaredMethods();
-                for (Method method: methods) {
-                    String methodName = method.toString();
-                    if (methodName.contains("InstallV1") && methodName.contains("loadInstallProfile")) {
-                        isV1 = true;
-                        break;
-                    }
-                }
-                return isV1 ? new InstallerV1() : new InstallerV0();
+    private static AbstractInstaller createInstaller() {
+        try {
+            Class<?> installerClass = Util.class.getMethod("loadInstallProfile").getReturnType();
+            if (installerClass.equals(Install.class)) {
+                return new InstallerV0();
+            } else if (installerClass.equals(InstallV1.class)) {
+                return new InstallerV1();
+            } else {
+                throw new IllegalArgumentException("Unable to determine the installer version. (" + installerClass + ")");
             }
-            case 1: return new InstallerV1();
-            default: throw new IllegalArgumentException("Invalid installer profile spec: " + installerSpec);
+        } catch (Throwable t) {
+            throw new RuntimeException(t);
         }
     }
 }

src/main/java/io/github/zekerzhayard/forgewrapper/installer/Main.java

@@ -47,7 +47,7 @@ public static void main(String[] args) throws Throwable {
                 installerJar.toUri().toURL()
             }, ModuleUtil.getPlatformClassLoader())) {
                 Class<?> installer = ucl.loadClass("io.github.zekerzhayard.forgewrapper.installer.Installer");
-                if (!(boolean) installer.getMethod("install", File.class, File.class, File.class, int.class).invoke(null, detector.getLibraryDir().toFile(), minecraftJar.toFile(), installerJar.toFile(), detector.getInstallProfileSpec(forgeFullVersion))) {
+                if (!(boolean) installer.getMethod("install", File.class, File.class, File.class).invoke(null, detector.getLibraryDir().toFile(), minecraftJar.toFile(), installerJar.toFile())) {
                     return;
                 }
             }

src/main/java/io/github/zekerzhayard/forgewrapper/installer/detector/IFileDetector.java

@@ -107,14 +107,6 @@ default String getMainClass(String forgeFullVersion) {
         return this.getDataFromInstaller(forgeFullVersion, "version.json", e -> e.getAsJsonObject().getAsJsonPrimitive("mainClass").getAsString());
     }
 
-    /**
-     * @param forgeFullVersion Forge full version (e.g. 1.14.4-28.2.0).
-     * @return The installer specification version.
-     */
-    default int getInstallProfileSpec(String forgeFullVersion) {
-        return this.getDataFromInstaller(forgeFullVersion, "install_profile.json", e -> e.getAsJsonObject().getAsJsonPrimitive("spec").getAsInt());
-    }
-
     /**
      * @param forgeFullVersion Forge full version (e.g. 1.14.4-28.2.0).
      * @return The json object in the-installer-jar-->install_profile.json-->data-->xxx-->client.
@@ -123,6 +115,7 @@ default JsonObject getInstallProfileExtraData(String forgeFullVersion) {
         return this.getDataFromInstaller(forgeFullVersion, "install_profile.json", e -> e.getAsJsonObject().getAsJsonObject("data"));
     }
 
+    @SuppressWarnings("deprecation")
     default <R> R getDataFromInstaller(String forgeFullVersion, String entry, Function<JsonElement, R> function) {
         Path installer = this.getInstallerJar(forgeFullVersion);
         if (isFile(installer)) {
@@ -186,7 +179,7 @@ default boolean checkExtraFiles(String forgeFullVersion) {
             // Check all cached libraries.
             boolean checked = true;
             for (Map.Entry<String, Path> entry : libsMap.entrySet()) {
-                checked = this.checkExtraFile(entry.getValue(), hashMap.get(entry.getKey() + "_SHA"));
+                checked = checkExtraFile(entry.getValue(), hashMap.get(entry.getKey() + "_SHA"));
                 if (!checked) {
                     System.out.println("Missing: " + entry.getValue());
                     break;
@@ -204,7 +197,7 @@ default boolean checkExtraFiles(String forgeFullVersion) {
      * @param sha1 The sha1 defined in installer.
      * @return True represents the file is ready.
      */
-    default boolean checkExtraFile(Path path, String sha1) {
+    static boolean checkExtraFile(Path path, String sha1) {
         return sha1 == null || sha1.equals("") || (isFile(path) && sha1.toLowerCase(Locale.ENGLISH).equals(getFileSHA1(path)));
     }