From 28b9bdf7ed2a21d4e648965c50a31a18c58422ad Mon Sep 17 00:00:00 2001
From: Nullptr <tsng.nullptr@outlook.com>
Date: Sat, 18 Sep 2021 14:14:21 +0800
Subject: [PATCH] Add allowing downgrade installation option

---
 manager/src/main/java/org/lsposed/lspatch/Patcher.kt | 2 ++
 patch/src/main/java/org/lsposed/patch/LSPatch.java   | 5 +++++
 2 files changed, 7 insertions(+)

diff --git a/manager/src/main/java/org/lsposed/lspatch/Patcher.kt b/manager/src/main/java/org/lsposed/lspatch/Patcher.kt
index ac01505..1632d1d 100644
--- a/manager/src/main/java/org/lsposed/lspatch/Patcher.kt
+++ b/manager/src/main/java/org/lsposed/lspatch/Patcher.kt
@@ -12,6 +12,7 @@ object Patcher {
         private val v2: Boolean,
         private val v3: Boolean,
         private val useManager: Boolean,
+        private val overrideVersionCode: Boolean,
         private val verbose: Boolean,
         private val embeddedModules: List<String>
     ) {
@@ -26,6 +27,7 @@ object Patcher {
                 add("--v2"); add(v2.toString())
                 add("--v3"); add(v3.toString())
                 if (useManager) add("--manager")
+                if (overrideVersionCode) add("-r")
                 if (verbose) add("-v")
                 if (embeddedModules.isNotEmpty()) {
                     add("-m"); addAll(embeddedModules)
diff --git a/patch/src/main/java/org/lsposed/patch/LSPatch.java b/patch/src/main/java/org/lsposed/patch/LSPatch.java
index 99109d2..e98ae0b 100644
--- a/patch/src/main/java/org/lsposed/patch/LSPatch.java
+++ b/patch/src/main/java/org/lsposed/patch/LSPatch.java
@@ -80,6 +80,9 @@ public class LSPatch {
     @Parameter(names = {"--manager"}, description = "Use manager (Cannot work with embedding modules)")
     private boolean useManager = false;
 
+    @Parameter(names = {"-r", "--allowdown"}, description = "Allow downgrade installation by overriding versionCode to 1 (In most cases, the app can still get the correct versionCode)")
+    private boolean overrideVersionCode = false;
+
     @Parameter(names = {"-v", "--verbose"}, description = "Verbose output")
     private boolean verbose = false;
 
@@ -345,6 +348,8 @@ public class LSPatch {
 
         if (!modules.isEmpty())
             property.addApplicationAttribute(new AttributeItem("extractNativeLibs", true));
+        if (overrideVersionCode)
+            property.addManifestAttribute(new AttributeItem(NodeValue.Manifest.VERSION_CODE, 1));
         property.addApplicationAttribute(new AttributeItem(NodeValue.Application.DEBUGGABLE, debuggableFlag));
         property.addApplicationAttribute(new AttributeItem("appComponentFactory", PROXY_APP_COMPONENT_FACTORY));
         // TODO: replace query_all with queries -> manager