Allow custom modloader versions for auto curseforge (#670)

Author: SavePointSam

src/main/java/me/itzg/helpers/curseforge/CurseForgeInstaller.java

@@ -142,6 +142,9 @@ public class CurseForgeInstaller {
     @Getter @Setter
     Duration fileDownloadRetryMinDelay = Duration.ofSeconds(5);
 
+    @Getter @Setter
+    private String customModLoaderVersion;
+
     /**
      */
     public void installFromModpackZip(Path modpackZip, String slug) {
@@ -972,7 +975,13 @@ private void prepareModLoader(String id, String minecraftVersion) {
         }
 
         final String provider = parts[0];
-        final String loaderVersion = parts.length == 2 ? parts[1] : parts[2];
+        String loaderVersion = parts.length == 2 ? parts[1] : parts[2];
+
+        // Override with custom versions if provided
+        if (customModLoaderVersion != null) {
+            log.info("Overriding mod loader version from {} to {}", loaderVersion, customModLoaderVersion);
+            loaderVersion = customModLoaderVersion;
+        }
 
         try (SharedFetch sharedFetch = Fetch.sharedFetch("install-curseforge", sharedFetchOptions)) {
 

src/main/java/me/itzg/helpers/curseforge/InstallCurseForgeCommand.java

@@ -89,6 +89,11 @@ public class InstallCurseForgeCommand implements Callable<Integer> {
     )
     String apiKey;
 
+    @Option(names = "--mod-loader-version", paramLabel = "VERSION",
+        description = "Override the mod loader version specified in the modpack"
+    )
+    String modLoaderVersion;
+
     @ArgGroup(exclusive = false)
     ExcludeIncludeArgs excludeIncludeArgs = new ExcludeIncludeArgs();
 
@@ -233,7 +238,8 @@ public Integer call() throws Exception {
             .setForgeUrlArgs(forgeUrlArgs)
             .setMaxConcurrentDownloads(maxConcurrentDownloads)
             .setFileDownloadRetries(fileDownloadRetries)
-            .setFileDownloadRetryMinDelay(fileDownloadRetryMinDelay);
+            .setFileDownloadRetryMinDelay(fileDownloadRetryMinDelay)
+            .setCustomModLoaderVersion(modLoaderVersion);
 
         if (apiBaseUrl != null) {
             installer.setApiBaseUrl(apiBaseUrl);