Added launch modifier to packages.

src/main/java/com/skcraft/launcher/Instance.java

@@ -7,6 +7,9 @@
 package com.skcraft.launcher;
 
 import com.fasterxml.jackson.annotation.JsonIgnore;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.skcraft.launcher.launch.JavaProcessBuilder;
+import com.skcraft.launcher.model.modpack.LaunchModifier;
 import lombok.Data;
 
 import java.io.File;
@@ -22,6 +25,8 @@ public class Instance implements Comparable<Instance> {
     private boolean updatePending;
     private boolean installed;
     private Date lastAccessed;
+    @JsonProperty("launch")
+    private LaunchModifier launchModifier;
 
     @JsonIgnore private File dir;
     @JsonIgnore private URL manifestURL;
@@ -33,6 +38,12 @@ public class Instance implements Comparable<Instance> {
         return title != null ? title : name;
     }
 
+    public void modify(JavaProcessBuilder builder) {
+        if (launchModifier != null) {
+            launchModifier.modify(builder);
+        }
+    }
+
     @JsonIgnore
     public File getContentDir() {
         return new File(dir, "minecraft");

src/main/java/com/skcraft/launcher/builder/BuilderConfig.java

@@ -6,6 +6,9 @@
 
 package com.skcraft.launcher.builder;
 
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.skcraft.launcher.model.modpack.LaunchModifier;
+import com.skcraft.launcher.model.modpack.Manifest;
 import lombok.Data;
 
 import java.util.List;
@@ -19,9 +22,18 @@ public class BuilderConfig {
     private String name;
     private String title;
     private String gameVersion;
+    @JsonProperty("launch")
+    private LaunchModifier launchModifier;
     private List<FeaturePattern> features;
     private FnPatternList userFiles;
 
+    public void update(Manifest manifest) {
+        manifest.updateName(getName());
+        manifest.updateTitle(getTitle());
+        manifest.updateGameVersion(getGameVersion());
+        manifest.setLaunchModifier(getLaunchModifier());
+    }
+
     public void registerProperties(PropertiesApplicator applicator) {
         if (features != null) {
             for (FeaturePattern feature : features) {

src/main/java/com/skcraft/launcher/builder/PackageBuilder.java

@@ -79,9 +79,7 @@ public class PackageBuilder {
     public void readConfig(File path) throws IOException {
         if (path != null) {
             BuilderConfig config = read(path, BuilderConfig.class);
-            manifest.updateName(config.getName());
-            manifest.updateTitle(config.getTitle());
-            manifest.updateGameVersion(config.getGameVersion());
+            config.update(manifest);
             config.registerProperties(applicator);
         }
     }

src/main/java/com/skcraft/launcher/launch/Runner.java

@@ -99,7 +99,7 @@ public class Runner implements Callable<Process>, ProgressObservable {
         builder = new JavaProcessBuilder();
         assetsRoot = launcher.getAssets();
 
-        // Load versionManifest and assets index
+        // Load manifiests
         versionManifest = mapper.readValue(instance.getVersionPath(), VersionManifest.class);
 
         // Load assets index
@@ -141,6 +141,8 @@ public class Runner implements Callable<Process>, ProgressObservable {
         builder.classPath(getJarPath());
         builder.setMainClass(versionManifest.getMainClass());
 
+        callLaunchModifier();
+
         ProcessBuilder processBuilder = new ProcessBuilder(builder.buildCommand());
         processBuilder.directory(instance.getContentDir());
         Runner.log.info("Launching: " + builder);
@@ -151,6 +153,13 @@ public class Runner implements Callable<Process>, ProgressObservable {
         return processBuilder.start();
     }
 
+    /**
+     * Call the manifest launch modifier.
+     */
+    private void callLaunchModifier() {
+        instance.modify(builder);
+    }
+
     /**
      * Add platform-specific arguments.
      */

src/main/java/com/skcraft/launcher/model/modpack/LaunchModifier.java

@@ -0,0 +1,26 @@
+/*
+ * SK's Minecraft Launcher
+ * Copyright (C) 2010-2014 Albert Pham <http://www.sk89q.com> and contributors
+ * Please see LICENSE.txt for license information.
+ */
+
+package com.skcraft.launcher.model.modpack;
+
+import com.skcraft.launcher.launch.JavaProcessBuilder;
+import lombok.Data;
+
+import java.util.List;
+
+@Data
+public class LaunchModifier {
+
+    private List<String> flags;
+
+    public void modify(JavaProcessBuilder builder) {
+        if (flags != null) {
+            for (String flag : flags) {
+                builder.getFlags().add(flag);
+            }
+        }
+    }
+}

src/main/java/com/skcraft/launcher/model/modpack/Manifest.java

@@ -8,7 +8,9 @@ package com.skcraft.launcher.model.modpack;
 
 import com.fasterxml.jackson.annotation.JsonIgnore;
 import com.fasterxml.jackson.annotation.JsonManagedReference;
+import com.fasterxml.jackson.annotation.JsonProperty;
 import com.google.common.base.Strings;
+import com.skcraft.launcher.Instance;
 import com.skcraft.launcher.LauncherUtils;
 import com.skcraft.launcher.model.minecraft.VersionManifest;
 import com.skcraft.launcher.install.Installer;
@@ -30,6 +32,8 @@ public class Manifest extends BaseManifest {
     private String librariesLocation;
     private String objectsLocation;
     private String gameVersion;
+    @JsonProperty("launch")
+    private LaunchModifier launchModifier;
     private List<Feature> features = new ArrayList<Feature>();
     @JsonManagedReference("manifest")
     private List<ManifestEntry> tasks = new ArrayList<ManifestEntry>();
@@ -80,4 +84,8 @@ public class Manifest extends BaseManifest {
             setGameVersion(gameVersion);
         }
     }
+
+    public void update(Instance instance) {
+        instance.setLaunchModifier(getLaunchModifier());
+    }
 }

src/main/java/com/skcraft/launcher/update/Updater.java

@@ -140,6 +140,9 @@ public class Updater extends BaseUpdater implements Callable<Instance>, Progress
         progress = new DefaultProgress(-1, _("instanceUpdater.readingManifest"));
         Manifest manifest = installPackage(installer, instance);
 
+        // Update instance from manifest
+        manifest.update(instance);
+
         // Read version manifest
         log.info("Reading version manifest...");
         progress = new DefaultProgress(-1, _("instanceUpdater.readingVersion"));