Don't invalidate files that aren't on the current side

build.gradle

@@ -50,6 +50,7 @@ task copyJar(type: Copy) {
 
 build.dependsOn copyJar
 
+if (project.hasProperty("github.token")) {
     githubRelease {
         // IntelliJ u ok?
         //noinspection GroovyAssignabilityCheck
@@ -63,8 +64,9 @@ githubRelease {
         //noinspection GroovyAssignabilityCheck
         draft true
         //noinspection GroovyAssignabilityCheck
-    token getProperty("github.token")
+        token findProperty("github.token") ?: ""
         releaseAssets = [jar.destinationDirectory.file("packwiz-installer.jar").get()]
     }
 
     tasks.githubRelease.dependsOn(build)
+}

src/main/java/link/infra/packwiz/installer/DownloadTask.java

@@ -97,6 +97,7 @@ class DownloadTask implements IOptionDetails, IExceptionDetails {
 					}
 				}
 				cachedFile.isOptional = isOptional();
+				cachedFile.onlyOtherSide = !correctSide();
 			}
 		}
 	}

src/main/java/link/infra/packwiz/installer/UpdateManager.java

@@ -153,6 +153,10 @@ public class UpdateManager {
 		List<SpaceSafeURI> invalidatedUris = new ArrayList<>();
 		if (manifest.cachedFiles != null) {
 			for (Map.Entry<SpaceSafeURI, ManifestFile.File> entry : manifest.cachedFiles.entrySet()) {
+				// ignore onlyOtherSide files
+				if (entry.getValue().onlyOtherSide) {
+					continue;
+				}
 				boolean invalid = false;
 				// if isn't optional, or is optional but optionValue == true
 				if (!entry.getValue().isOptional || entry.getValue().optionValue) {

src/main/java/link/infra/packwiz/installer/metadata/EfficientBooleanAdapter.java

@@ -0,0 +1,29 @@
+package link.infra.packwiz.installer.metadata;
+
+import com.google.gson.TypeAdapter;
+import com.google.gson.stream.JsonReader;
+import com.google.gson.stream.JsonToken;
+import com.google.gson.stream.JsonWriter;
+
+import java.io.IOException;
+
+public class EfficientBooleanAdapter extends TypeAdapter<Boolean> {
+
+	@Override
+	public void write(JsonWriter out, Boolean value) throws IOException {
+		if (value == null || !value) {
+			out.nullValue();
+			return;
+		}
+		out.value(true);
+	}
+
+	@Override
+	public Boolean read(JsonReader in) throws IOException {
+		if (in.peek() == JsonToken.NULL) {
+			in.nextNull();
+			return false;
+		}
+		return in.nextBoolean();
+	}
+}

src/main/java/link/infra/packwiz/installer/metadata/ManifestFile.java

@@ -1,5 +1,6 @@
 package link.infra.packwiz.installer.metadata;
 
+import com.google.gson.annotations.JsonAdapter;
 import link.infra.packwiz.installer.UpdateManager;
 import link.infra.packwiz.installer.metadata.hash.Hash;
 
@@ -19,9 +20,13 @@ public class ManifestFile {
 		public Hash linkedFileHash = null;
 		public String cachedLocation = null;
 
+		@JsonAdapter(EfficientBooleanAdapter.class)
 		public boolean isOptional = false;
 		public boolean optionValue = true;
 
+		@JsonAdapter(EfficientBooleanAdapter.class)
+		public boolean onlyOtherSide = false;
+
 		// When an error occurs, the state needs to be reverted. To do this, I have a crude revert system.
 		public void backup() {
 			revert = new File();
@@ -30,6 +35,7 @@ public class ManifestFile {
 			revert.cachedLocation = cachedLocation;
 			revert.isOptional = isOptional;
 			revert.optionValue = optionValue;
+			revert.onlyOtherSide = onlyOtherSide;
 		}
 
 		public File getRevert() {