chore: Release v21.1.0-dev.1 [skip ci]

# [21.1.0-dev.1](https://github.com/ReVanced/revanced-patcher/compare/v21.0.0...v21.1.0-dev.1) (2024-12-07)

### Features

* Add identity hash code to unnamed patches ([88a3252](88a3252574))

CHANGELOG.md

@@ -1,3 +1,104 @@
+# [21.1.0-dev.1](https://github.com/ReVanced/revanced-patcher/compare/v21.0.0...v21.1.0-dev.1) (2024-12-07)
+
+
+### Features
+
+* Add identity hash code to unnamed patches ([88a3252](https://github.com/ReVanced/revanced-patcher/commit/88a325257494939a79fb30dd51d60c5c52546755))
+
+# [21.0.0](https://github.com/ReVanced/revanced-patcher/compare/v20.0.2...v21.0.0) (2024-11-05)
+
+
+### Bug Fixes
+
+* Match fingerprint before delegating the match property ([5d996de](https://github.com/ReVanced/revanced-patcher/commit/5d996def4d3de4e2bfc34562e5a6c7d89a8cddf0))
+* Merge extension only when patch executes ([#315](https://github.com/ReVanced/revanced-patcher/issues/315)) ([aa472eb](https://github.com/ReVanced/revanced-patcher/commit/aa472eb9857145b53b49f843406a9764fbb7e5ce))
+
+
+### Features
+
+* Improve Fingerprint API ([#316](https://github.com/ReVanced/revanced-patcher/issues/316)) ([0abf1c6](https://github.com/ReVanced/revanced-patcher/commit/0abf1c6c0279708fdef5cb66b141d07d17682693))
+* Improve various APIs  ([#317](https://github.com/ReVanced/revanced-patcher/issues/317)) ([b824978](https://github.com/ReVanced/revanced-patcher/commit/b8249789df8b90129f7b7ad0e523a8d0ceaab848))
+* Move fingerprint match members to fingerprint for ease of access by using context receivers ([0746c22](https://github.com/ReVanced/revanced-patcher/commit/0746c22743a9561bae2284d234b151f2f8511ca5))
+
+
+### Performance Improvements
+
+* Use smallest lookup map for strings ([1358d3f](https://github.com/ReVanced/revanced-patcher/commit/1358d3fa10cb8ba011b6b89cfe3684ecf9849d2f))
+
+
+### BREAKING CHANGES
+
+* Various APIs have been changed.
+* Many APIs have been changed.
+
+# [21.0.0-dev.4](https://github.com/ReVanced/revanced-patcher/compare/v21.0.0-dev.3...v21.0.0-dev.4) (2024-11-05)
+
+
+### Performance Improvements
+
+* Use smallest lookup map for strings ([1358d3f](https://github.com/ReVanced/revanced-patcher/commit/1358d3fa10cb8ba011b6b89cfe3684ecf9849d2f))
+
+# [21.0.0-dev.3](https://github.com/ReVanced/revanced-patcher/compare/v21.0.0-dev.2...v21.0.0-dev.3) (2024-11-05)
+
+
+### Features
+
+* Move fingerprint match members to fingerprint for ease of access by using context receivers ([0746c22](https://github.com/ReVanced/revanced-patcher/commit/0746c22743a9561bae2284d234b151f2f8511ca5))
+
+# [21.0.0-dev.2](https://github.com/ReVanced/revanced-patcher/compare/v21.0.0-dev.1...v21.0.0-dev.2) (2024-11-01)
+
+
+### Bug Fixes
+
+* Match fingerprint before delegating the match property ([5d996de](https://github.com/ReVanced/revanced-patcher/commit/5d996def4d3de4e2bfc34562e5a6c7d89a8cddf0))
+
+# [21.0.0-dev.1](https://github.com/ReVanced/revanced-patcher/compare/v20.0.2...v21.0.0-dev.1) (2024-10-27)
+
+
+### Bug Fixes
+
+* Merge extension only when patch executes ([#315](https://github.com/ReVanced/revanced-patcher/issues/315)) ([aa472eb](https://github.com/ReVanced/revanced-patcher/commit/aa472eb9857145b53b49f843406a9764fbb7e5ce))
+
+
+### Features
+
+* Improve Fingerprint API ([#316](https://github.com/ReVanced/revanced-patcher/issues/316)) ([0abf1c6](https://github.com/ReVanced/revanced-patcher/commit/0abf1c6c0279708fdef5cb66b141d07d17682693))
+* Improve various APIs  ([#317](https://github.com/ReVanced/revanced-patcher/issues/317)) ([b824978](https://github.com/ReVanced/revanced-patcher/commit/b8249789df8b90129f7b7ad0e523a8d0ceaab848))
+
+
+### BREAKING CHANGES
+
+* Various APIs have been changed.
+* Many APIs have been changed.
+
+## [20.0.2](https://github.com/ReVanced/revanced-patcher/compare/v20.0.1...v20.0.2) (2024-10-17)
+
+
+### Bug Fixes
+
+* Make it work on Android 12 and lower by using existing APIs ([#312](https://github.com/ReVanced/revanced-patcher/issues/312)) ([a44802e](https://github.com/ReVanced/revanced-patcher/commit/a44802ef4ebf59ae47213854ba761c81dadc51f3))
+
+## [20.0.2-dev.1](https://github.com/ReVanced/revanced-patcher/compare/v20.0.1...v20.0.2-dev.1) (2024-10-15)
+
+
+### Bug Fixes
+
+* Make it work on Android 12 and lower by using existing APIs ([#312](https://github.com/ReVanced/revanced-patcher/issues/312)) ([a44802e](https://github.com/ReVanced/revanced-patcher/commit/a44802ef4ebf59ae47213854ba761c81dadc51f3))
+
+## [20.0.1](https://github.com/ReVanced/revanced-patcher/compare/v20.0.0...v20.0.1) (2024-10-13)
+
+
+### Bug Fixes
+
+* Check for class type exactly instead of with contains ([#310](https://github.com/ReVanced/revanced-patcher/issues/310)) ([69f2f20](https://github.com/ReVanced/revanced-patcher/commit/69f2f20fd99162f91cd9c531dfe47d00d3152ead))
+* Make it work on Android by not using APIs from JVM unavailable to Android. ([2be6e97](https://github.com/ReVanced/revanced-patcher/commit/2be6e97817437f40e17893dfff3bea2cd4c3ff9e))
+* Use non-nullable type for options ([ea6fc70](https://github.com/ReVanced/revanced-patcher/commit/ea6fc70caab055251ad4d0d3f1b5cf53865abb85))
+
+
+### Performance Improvements
+
+* Free memory earlier and remove negligible lookup maps ([d53aacd](https://github.com/ReVanced/revanced-patcher/commit/d53aacdad4ed3750ddae526fb307577ea36e6171))
+
 ## [20.0.1-dev.5](https://github.com/ReVanced/revanced-patcher/compare/v20.0.1-dev.4...v20.0.1-dev.5) (2024-10-11)
 
 

api/revanced-patcher.api

@@ -1,7 +1,22 @@
 public final class app/revanced/patcher/Fingerprint {
-	public final fun getMatch ()Lapp/revanced/patcher/Match;
+	public final fun getClassDef (Lapp/revanced/patcher/patch/BytecodePatchContext;)Lapp/revanced/patcher/util/proxy/mutableTypes/MutableClass;
-	public final fun match (Lapp/revanced/patcher/patch/BytecodePatchContext;Lcom/android/tools/smali/dexlib2/iface/ClassDef;)Z
+	public final fun getClassDefOrNull (Lapp/revanced/patcher/patch/BytecodePatchContext;)Lapp/revanced/patcher/util/proxy/mutableTypes/MutableClass;
-	public final fun match (Lapp/revanced/patcher/patch/BytecodePatchContext;Lcom/android/tools/smali/dexlib2/iface/Method;)Z
+	public final fun getMethod (Lapp/revanced/patcher/patch/BytecodePatchContext;)Lapp/revanced/patcher/util/proxy/mutableTypes/MutableMethod;
+	public final fun getMethodOrNull (Lapp/revanced/patcher/patch/BytecodePatchContext;)Lapp/revanced/patcher/util/proxy/mutableTypes/MutableMethod;
+	public final fun getOriginalClassDef (Lapp/revanced/patcher/patch/BytecodePatchContext;)Lcom/android/tools/smali/dexlib2/iface/ClassDef;
+	public final fun getOriginalClassDefOrNull (Lapp/revanced/patcher/patch/BytecodePatchContext;)Lcom/android/tools/smali/dexlib2/iface/ClassDef;
+	public final fun getOriginalMethod (Lapp/revanced/patcher/patch/BytecodePatchContext;)Lcom/android/tools/smali/dexlib2/iface/Method;
+	public final fun getOriginalMethodOrNull (Lapp/revanced/patcher/patch/BytecodePatchContext;)Lcom/android/tools/smali/dexlib2/iface/Method;
+	public final fun getPatternMatch (Lapp/revanced/patcher/patch/BytecodePatchContext;)Lapp/revanced/patcher/Match$PatternMatch;
+	public final fun getPatternMatchOrNull (Lapp/revanced/patcher/patch/BytecodePatchContext;)Lapp/revanced/patcher/Match$PatternMatch;
+	public final fun getStringMatches (Lapp/revanced/patcher/patch/BytecodePatchContext;)Ljava/util/List;
+	public final fun getStringMatchesOrNull (Lapp/revanced/patcher/patch/BytecodePatchContext;)Ljava/util/List;
+	public final fun match (Lapp/revanced/patcher/patch/BytecodePatchContext;Lcom/android/tools/smali/dexlib2/iface/ClassDef;)Lapp/revanced/patcher/Match;
+	public final fun match (Lapp/revanced/patcher/patch/BytecodePatchContext;Lcom/android/tools/smali/dexlib2/iface/Method;)Lapp/revanced/patcher/Match;
+	public final fun match (Lapp/revanced/patcher/patch/BytecodePatchContext;Lcom/android/tools/smali/dexlib2/iface/Method;Lcom/android/tools/smali/dexlib2/iface/ClassDef;)Lapp/revanced/patcher/Match;
+	public final fun matchOrNull (Lapp/revanced/patcher/patch/BytecodePatchContext;Lcom/android/tools/smali/dexlib2/iface/ClassDef;)Lapp/revanced/patcher/Match;
+	public final fun matchOrNull (Lapp/revanced/patcher/patch/BytecodePatchContext;Lcom/android/tools/smali/dexlib2/iface/Method;)Lapp/revanced/patcher/Match;
+	public final fun matchOrNull (Lapp/revanced/patcher/patch/BytecodePatchContext;Lcom/android/tools/smali/dexlib2/iface/Method;Lcom/android/tools/smali/dexlib2/iface/ClassDef;)Lapp/revanced/patcher/Match;
 }
 
 public final class app/revanced/patcher/FingerprintBuilder {
@@ -18,32 +33,27 @@ public final class app/revanced/patcher/FingerprintBuilder {
 
 public final class app/revanced/patcher/FingerprintKt {
 	public static final fun fingerprint (ILkotlin/jvm/functions/Function1;)Lapp/revanced/patcher/Fingerprint;
-	public static final fun fingerprint (Lapp/revanced/patcher/patch/BytecodePatchBuilder;ILkotlin/jvm/functions/Function1;)Lapp/revanced/patcher/patch/BytecodePatchBuilder$InvokedFingerprint;
 	public static synthetic fun fingerprint$default (ILkotlin/jvm/functions/Function1;ILjava/lang/Object;)Lapp/revanced/patcher/Fingerprint;
-	public static synthetic fun fingerprint$default (Lapp/revanced/patcher/patch/BytecodePatchBuilder;ILkotlin/jvm/functions/Function1;ILjava/lang/Object;)Lapp/revanced/patcher/patch/BytecodePatchBuilder$InvokedFingerprint;
 }
 
 public abstract interface annotation class app/revanced/patcher/InternalApi : java/lang/annotation/Annotation {
 }
 
 public final class app/revanced/patcher/Match {
-	public fun <init> (Lcom/android/tools/smali/dexlib2/iface/Method;Lcom/android/tools/smali/dexlib2/iface/ClassDef;Lapp/revanced/patcher/Match$PatternMatch;Ljava/util/List;Lapp/revanced/patcher/patch/BytecodePatchContext;)V
+	public final fun getClassDef ()Lapp/revanced/patcher/util/proxy/mutableTypes/MutableClass;
-	public final fun getClassDef ()Lcom/android/tools/smali/dexlib2/iface/ClassDef;
+	public final fun getMethod ()Lapp/revanced/patcher/util/proxy/mutableTypes/MutableMethod;
-	public final fun getMethod ()Lcom/android/tools/smali/dexlib2/iface/Method;
+	public final fun getOriginalClassDef ()Lcom/android/tools/smali/dexlib2/iface/ClassDef;
-	public final fun getMutableClass ()Lapp/revanced/patcher/util/proxy/mutableTypes/MutableClass;
+	public final fun getOriginalMethod ()Lcom/android/tools/smali/dexlib2/iface/Method;
-	public final fun getMutableMethod ()Lapp/revanced/patcher/util/proxy/mutableTypes/MutableMethod;
 	public final fun getPatternMatch ()Lapp/revanced/patcher/Match$PatternMatch;
 	public final fun getStringMatches ()Ljava/util/List;
 }
 
 public final class app/revanced/patcher/Match$PatternMatch {
-	public fun <init> (II)V
 	public final fun getEndIndex ()I
 	public final fun getStartIndex ()I
 }
 
 public final class app/revanced/patcher/Match$StringMatch {
-	public fun <init> (Ljava/lang/String;I)V
 	public final fun getIndex ()I
 	public final fun getString ()Ljava/lang/String;
 }
@@ -63,8 +73,8 @@ public final class app/revanced/patcher/Patcher : java/io/Closeable {
 }
 
 public final class app/revanced/patcher/PatcherConfig {
-	public fun <init> (Ljava/io/File;Ljava/io/File;Ljava/lang/String;Ljava/lang/String;Z)V
+	public fun <init> (Ljava/io/File;Ljava/io/File;Ljava/lang/String;Ljava/lang/String;)V
-	public synthetic fun <init> (Ljava/io/File;Ljava/io/File;Ljava/lang/String;Ljava/lang/String;ZILkotlin/jvm/internal/DefaultConstructorMarker;)V
+	public synthetic fun <init> (Ljava/io/File;Ljava/io/File;Ljava/lang/String;Ljava/lang/String;ILkotlin/jvm/internal/DefaultConstructorMarker;)V
 }
 
 public final class app/revanced/patcher/PatcherContext : java/io/Closeable {
@@ -135,31 +145,24 @@ public final class app/revanced/patcher/extensions/InstructionExtensions {
 }
 
 public final class app/revanced/patcher/patch/BytecodePatch : app/revanced/patcher/patch/Patch {
-	public final fun getExtension ()Ljava/io/InputStream;
+	public final fun getExtensionInputStream ()Ljava/util/function/Supplier;
-	public final fun getFingerprints ()Ljava/util/Set;
 	public fun toString ()Ljava/lang/String;
 }
 
 public final class app/revanced/patcher/patch/BytecodePatchBuilder : app/revanced/patcher/patch/PatchBuilder {
 	public synthetic fun build$revanced_patcher ()Lapp/revanced/patcher/patch/Patch;
 	public final fun extendWith (Ljava/lang/String;)Lapp/revanced/patcher/patch/BytecodePatchBuilder;
-	public final fun getExtension ()Ljava/io/InputStream;
+	public final fun getExtensionInputStream ()Ljava/util/function/Supplier;
-	public final fun invoke (Lapp/revanced/patcher/Fingerprint;)Lapp/revanced/patcher/patch/BytecodePatchBuilder$InvokedFingerprint;
+	public final fun setExtensionInputStream (Ljava/util/function/Supplier;)V
-	public final fun setExtension (Ljava/io/InputStream;)V
-}
-
-public final class app/revanced/patcher/patch/BytecodePatchBuilder$InvokedFingerprint {
-	public final fun getValue (Ljava/lang/Void;Lkotlin/reflect/KProperty;)Lapp/revanced/patcher/Match;
 }
 
 public final class app/revanced/patcher/patch/BytecodePatchContext : app/revanced/patcher/patch/PatchContext, java/io/Closeable {
 	public final fun classBy (Lkotlin/jvm/functions/Function1;)Lapp/revanced/patcher/util/proxy/ClassProxy;
-	public final fun classByType (Ljava/lang/String;)Lapp/revanced/patcher/util/proxy/ClassProxy;
 	public fun close ()V
 	public synthetic fun get ()Ljava/lang/Object;
 	public fun get ()Ljava/util/Set;
 	public final fun getClasses ()Lapp/revanced/patcher/util/ProxyClassList;
-	public final fun navigate (Lcom/android/tools/smali/dexlib2/iface/Method;)Lapp/revanced/patcher/util/MethodNavigator;
+	public final fun navigate (Lcom/android/tools/smali/dexlib2/iface/reference/MethodReference;)Lapp/revanced/patcher/util/MethodNavigator;
 	public final fun proxy (Lcom/android/tools/smali/dexlib2/iface/ClassDef;)Lapp/revanced/patcher/util/proxy/ClassProxy;
 }
 
@@ -286,7 +289,7 @@ public final class app/revanced/patcher/patch/Options : java/util/Map, kotlin/jv
 }
 
 public abstract class app/revanced/patcher/patch/Patch {
-	public synthetic fun <init> (Ljava/lang/String;Ljava/lang/String;ZLjava/util/Set;Ljava/util/Set;Ljava/util/Set;Lkotlin/jvm/functions/Function2;Lkotlin/jvm/functions/Function2;Lkotlin/jvm/internal/DefaultConstructorMarker;)V
+	public synthetic fun <init> (Ljava/lang/String;Ljava/lang/String;ZLjava/util/Set;Ljava/util/Set;Ljava/util/Set;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/internal/DefaultConstructorMarker;)V
 	public final fun execute (Lapp/revanced/patcher/patch/PatchContext;)V
 	public final fun finalize (Lapp/revanced/patcher/patch/PatchContext;)V
 	public final fun getCompatiblePackages ()Ljava/util/Set;
@@ -303,13 +306,13 @@ public abstract class app/revanced/patcher/patch/PatchBuilder {
 	public final fun compatibleWith ([Ljava/lang/String;)V
 	public final fun compatibleWith ([Lkotlin/Pair;)V
 	public final fun dependsOn ([Lapp/revanced/patcher/patch/Patch;)V
-	public final fun execute (Lkotlin/jvm/functions/Function2;)V
+	public final fun execute (Lkotlin/jvm/functions/Function1;)V
-	public final fun finalize (Lkotlin/jvm/functions/Function2;)V
+	public final fun finalize (Lkotlin/jvm/functions/Function1;)V
 	protected final fun getCompatiblePackages ()Ljava/util/Set;
 	protected final fun getDependencies ()Ljava/util/Set;
 	protected final fun getDescription ()Ljava/lang/String;
-	protected final fun getExecutionBlock ()Lkotlin/jvm/functions/Function2;
+	protected final fun getExecutionBlock ()Lkotlin/jvm/functions/Function1;
-	protected final fun getFinalizeBlock ()Lkotlin/jvm/functions/Function2;
+	protected final fun getFinalizeBlock ()Lkotlin/jvm/functions/Function1;
 	protected final fun getName ()Ljava/lang/String;
 	protected final fun getOptions ()Ljava/util/Set;
 	protected final fun getUse ()Z
@@ -317,8 +320,8 @@ public abstract class app/revanced/patcher/patch/PatchBuilder {
 	public final fun invoke (Ljava/lang/String;[Ljava/lang/String;)Lkotlin/Pair;
 	protected final fun setCompatiblePackages (Ljava/util/Set;)V
 	protected final fun setDependencies (Ljava/util/Set;)V
-	protected final fun setExecutionBlock (Lkotlin/jvm/functions/Function2;)V
+	protected final fun setExecutionBlock (Lkotlin/jvm/functions/Function1;)V
-	protected final fun setFinalizeBlock (Lkotlin/jvm/functions/Function2;)V
+	protected final fun setFinalizeBlock (Lkotlin/jvm/functions/Function1;)V
 }
 
 public abstract interface class app/revanced/patcher/patch/PatchContext : java/util/function/Supplier {
@@ -395,18 +398,13 @@ public final class app/revanced/patcher/patch/ResourcePatchBuilder : app/revance
 }
 
 public final class app/revanced/patcher/patch/ResourcePatchContext : app/revanced/patcher/patch/PatchContext {
+	public final fun delete (Ljava/lang/String;)Z
+	public final fun document (Ljava/io/InputStream;)Lapp/revanced/patcher/util/Document;
+	public final fun document (Ljava/lang/String;)Lapp/revanced/patcher/util/Document;
 	public fun get ()Lapp/revanced/patcher/PatcherResult$PatchedResources;
 	public synthetic fun get ()Ljava/lang/Object;
 	public final fun get (Ljava/lang/String;Z)Ljava/io/File;
 	public static synthetic fun get$default (Lapp/revanced/patcher/patch/ResourcePatchContext;Ljava/lang/String;ZILjava/lang/Object;)Ljava/io/File;
-	public final fun getDocument ()Lapp/revanced/patcher/patch/ResourcePatchContext$DocumentOperatable;
-	public final fun stageDelete (Lkotlin/jvm/functions/Function1;)Z
-}
-
-public final class app/revanced/patcher/patch/ResourcePatchContext$DocumentOperatable {
-	public fun <init> (Lapp/revanced/patcher/patch/ResourcePatchContext;)V
-	public final fun get (Ljava/io/InputStream;)Lapp/revanced/patcher/util/Document;
-	public final fun get (Ljava/lang/String;)Lapp/revanced/patcher/util/Document;
 }
 
 public final class app/revanced/patcher/util/Document : java/io/Closeable, org/w3c/dom/Document {
@@ -482,11 +480,12 @@ public final class app/revanced/patcher/util/Document : java/io/Closeable, org/w
 }
 
 public final class app/revanced/patcher/util/MethodNavigator {
-	public final fun at (ILkotlin/jvm/functions/Function1;)Lapp/revanced/patcher/util/MethodNavigator;
+	public final fun getValue (Ljava/lang/Void;Lkotlin/reflect/KProperty;)Lapp/revanced/patcher/util/proxy/mutableTypes/MutableMethod;
-	public final fun at ([I)Lapp/revanced/patcher/util/MethodNavigator;
+	public final fun original ()Lcom/android/tools/smali/dexlib2/iface/Method;
-	public static synthetic fun at$default (Lapp/revanced/patcher/util/MethodNavigator;ILkotlin/jvm/functions/Function1;ILjava/lang/Object;)Lapp/revanced/patcher/util/MethodNavigator;
+	public final fun stop ()Lapp/revanced/patcher/util/proxy/mutableTypes/MutableMethod;
-	public final fun immutable ()Lcom/android/tools/smali/dexlib2/iface/Method;
+	public final fun to (ILkotlin/jvm/functions/Function1;)Lapp/revanced/patcher/util/MethodNavigator;
-	public final fun mutable ()Lapp/revanced/patcher/util/proxy/mutableTypes/MutableMethod;
+	public final fun to ([I)Lapp/revanced/patcher/util/MethodNavigator;
+	public static synthetic fun to$default (Lapp/revanced/patcher/util/MethodNavigator;ILkotlin/jvm/functions/Function1;ILjava/lang/Object;)Lapp/revanced/patcher/util/MethodNavigator;
 }
 
 public final class app/revanced/patcher/util/ProxyClassList : java/util/List, kotlin/jvm/internal/markers/KMutableList {

build.gradle.kts

@@ -56,6 +56,8 @@ dependencies {
 kotlin {
     compilerOptions {
         jvmTarget.set(JvmTarget.JVM_11)
+
+        freeCompilerArgs = listOf("-Xcontext-receivers")
     }
 }
 

docs/1_patcher_intro.md

@@ -89,9 +89,9 @@ val patcherResult = Patcher(PatcherConfig(apkFile = File("some.apk"))).use { pat
     runBlocking {
         patcher().collect { patchResult ->
             if (patchResult.exception != null)
-                logger.info("\"${patchResult.patch}\" failed:\n${patchResult.exception}")
+                logger.info { "\"${patchResult.patch}\" failed:\n${patchResult.exception}" }
             else
-                logger.info("\"${patchResult.patch}\" succeeded")
+                logger.info { "\"${patchResult.patch}\" succeeded" }
         }
     }
 

docs/2_1_setup.md

@@ -72,6 +72,10 @@ To start developing patches with ReVanced Patcher, you must prepare a developmen
 
 Throughout the documentation, [ReVanced Patches](https://github.com/revanced/revanced-patches) will be used as an example project.
 
+> [!NOTE]
+> To start a fresh project, 
+> you can use the [ReVanced Patches template](https://github.com/revanced/revanced-patches-template).
+
 1. Clone the repository
 
    ```bash

docs/2_2_patch_anatomy.md

@@ -76,23 +76,23 @@ val disableAdsPatch = bytecodePatch(
 ) { 
     compatibleWith("com.some.app"("1.0.0"))
     
-    // Resource patch disables ads by patching resource files.
+    // Patches can depend on other patches, executing them first.
     dependsOn(disableAdsResourcePatch)
 
-    // Precompiled DEX file to be merged into the patched app.
+    // Merge precompiled DEX files into the patched app, before the patch is executed.
     extendWith("disable-ads.rve")
-
-    // Fingerprint to find the method to patch.
-    val showAdsMatch by showAdsFingerprint {
-        // More about fingerprints on the next page of the documentation.
-    }
     
     // Business logic of the patch to disable ads in the app.
     execute {
+        // Fingerprint to find the method to patch.
+        val showAdsMatch by showAdsFingerprint {
+          // More about fingerprints on the next page of the documentation.
+        }
+      
         // In the method that shows ads,
         // call DisableAdsPatch.shouldDisableAds() from the extension (precompiled DEX file)
         // to enable or disable ads.
-        showAdsMatch.mutableMethod.addInstructions(
+        showAdsMatch.method.addInstructions(
             0,
             """
                 invoke-static {}, LDisableAdsPatch;->shouldDisableAds()Z
@@ -146,10 +146,10 @@ loadPatchesJar(patches).apply {
 The type of an option can be obtained from the `type` property of the option:
 
 ```kt
-option.type // The KType of the option.
+option.type // The KType of the option. Captures the full type information of the option.
 ```
 
-Options can be declared outside of a patch and added to a patch manually:
+Options can be declared outside a patch and added to a patch manually:
 
 ```kt
 val option = stringOption(key = "option")
@@ -183,11 +183,9 @@ and use it in a patch:
 ```kt
 val patch = bytecodePatch(name = "Complex patch") {
     extendWith("complex-patch.rve")
-    
+  
-    val match by methodFingerprint()
-    
     execute { 
-        match.mutableMethod.addInstructions(0, "invoke-static { }, LComplexPatch;->doSomething()V")
+        fingerprint.match!!.mutableMethod.addInstructions(0, "invoke-static { }, LComplexPatch;->doSomething()V")
     }
 }
 ```

docs/2_patches_intro.md

@@ -96,21 +96,21 @@ Example of patches:
 @Surpress("unused")
 val bytecodePatch = bytecodePatch {
     execute { 
-        // TODO
+        // More about this on the next page of the documentation.
     }
 }
 
 @Surpress("unused")
 val rawResourcePatch = rawResourcePatch {
-    execute { 
+    execute {
-        // TODO
+        // More about this on the next page of the documentation.
     }
 }
 
 @Surpress("unused")
 val resourcePatch = resourcePatch {
-    execute { 
+    execute {
-        // TODO
+        // More about this on the next page of the documentation.
     }
 }
 ```

docs/4_apis.md

@@ -4,18 +4,107 @@ A handful of APIs are available to make patch development easier and more effici
 
 ## 📙 Overview
 
-1. 👹 Mutate classes with `context.proxy(ClassDef)`
+1. 👹 Create mutable replacements of classes with `proxy(ClassDef)`
-2. 🔍 Find and proxy existing classes with `classBy(Predicate)` and `classByType(String)`
+2. 🔍 Find and create mutable replaces with `classBy(Predicate)`
-3. 🏃‍ Easily access referenced methods recursively by index with `MethodNavigator`
+3. 🏃‍ Navigate method calls recursively by index with `navigate(Method)`
-4. 🔨 Make use of extension functions from `BytecodeUtils` and `ResourceUtils` with certain applications
+4. 💾 Read and write resource files with `get(String, Boolean)` and `delete(String)`
-(Available in ReVanced Patches)
+5. 📃 Read and write DOM files using `document(String)` and  `document(InputStream)`
-5. 💾 Read and write (decoded) resources with `ResourcePatchContext.get(Path, Boolean)`
-6. 📃 Read and write DOM files using `ResourcePatchContext.document`
 
 ### 🧰 APIs
 
-> [!WARNING]
+#### 👹 `proxy(ClassDef)`
-> This section is still under construction and may be incomplete.
+
+By default, the classes are immutable, meaning they cannot be modified.
+To make a class mutable, use the `proxy(ClassDef)` function.
+This function creates a lazy mutable copy of the class definition.
+Accessing the property will replace the original class definition with the mutable copy,
+thus allowing you to make changes to the class. Subsequent accesses will return the same mutable copy.
+
+```kt
+execute {
+    val mutableClass = proxy(classDef)
+    mutableClass.methods.add(Method())
+}
+```
+
+#### 🔍 `classBy(Predicate)`
+
+The `classBy(Predicate)` function is an alternative to finding and creating mutable classes by a predicate.
+It automatically proxies the class definition, making it mutable.
+
+```kt
+execute {
+    // Alternative to proxy(classes.find { it.name == "Lcom/example/MyClass;" })?.classDef
+    val classDef = classBy { it.name == "Lcom/example/MyClass;" }?.classDef
+}
+```
+
+#### 🏃‍ `navigate(Method).at(index)`
+
+The `navigate(Method)` function allows you to navigate method calls recursively by index.
+
+```kt
+execute {
+    // Sequentially navigate to the instructions at index 1 within 'someMethod'.
+    val method = navigate(someMethod).to(1).original() // original() returns the original immutable method.
+    
+    // Further navigate to the second occurrence where the instruction's opcode is 'INVOKEVIRTUAL'.
+    // stop() returns the mutable copy of the method.
+    val method = navigate(someMethod).to(2) { instruction -> instruction.opcode == Opcode.INVOKEVIRTUAL }.stop()
+    
+    // Alternatively, to stop(), you can delegate the method to a variable.
+    val method by navigate(someMethod).to(1)
+    
+    // You can chain multiple calls to at() to navigate deeper into the method.
+    val method by navigate(someMethod).to(1).to(2, 3, 4).to(5)
+}
+```
+
+#### 💾 `get(String, Boolean)` and `delete(String)`
+
+The `get(String, Boolean)` function returns a `File` object that can be used to read and write resource files.
+
+```kt
+execute {
+    val file = get("res/values/strings.xml")
+    val content = file.readText()
+    file.writeText(content)
+}
+```
+
+The `delete` function can mark files for deletion when the APK is rebuilt.
+
+```kt
+execute {
+    delete("res/values/strings.xml")
+}
+```
+
+#### 📃 `document(String)`  and  `document(InputStream)`
+
+The `document` function is used to read and write DOM files.
+
+```kt
+execute {
+    document("res/values/strings.xml").use { document ->
+        val element = doc.createElement("string").apply {
+            textContent = "Hello, World!"
+        }
+        document.documentElement.appendChild(element)
+    }
+}
+```
+
+You can also read documents from an `InputStream`:
+
+```kt
+execute {
+    val inputStream = classLoader.getResourceAsStream("some.xml")
+    document(inputStream).use { document ->
+        // ...
+    }
+}
+```
 
 ## 🎉 Afterword
 
@@ -23,5 +112,6 @@ ReVanced Patcher is a powerful library to patch Android applications, offering a
 that outlive app updates. Patches make up ReVanced; without you, the community of patch developers,
 ReVanced would not be what it is today. We hope that this documentation has been helpful to you
 and are excited to see what you will create with ReVanced Patcher. If you have any questions or need help,
-talk to us on one of our platforms linked on [revanced.app](https://revanced.app) or open an issue in case of a bug or feature request,  
+talk to us on one of our platforms linked on [revanced.app](https://revanced.app) or open an issue in case of a bug or
+feature request,  
 ReVanced

gradle.properties

@@ -1,3 +1,3 @@
 org.gradle.parallel = true
 org.gradle.caching = true
-version = 20.0.1-dev.5
+version = 21.1.0-dev.1

src/main/kotlin/app/revanced/patcher/Patcher.kt

@@ -91,19 +91,15 @@ class Patcher(private val config: PatcherConfig) : Closeable {
             }.also { executedPatches[this] = it }
         }
 
-        // Prevent from decoding the app manifest twice if it is not needed.
+        // Prevent decoding the app manifest twice if it is not needed.
         if (config.resourceMode != ResourcePatchContext.ResourceMode.NONE) {
             context.resourceContext.decodeResources(config.resourceMode)
         }
 
-        logger.info("Merging extensions")
+        logger.info("Initializing lookup maps")
 
-        with(context.bytecodeContext) {
+        // Accessing the lazy lookup maps to initialize them.
-            context.executablePatches.mergeExtensions()
+        context.bytecodeContext.lookupMaps
-
-            // Initialize lookup maps.
-           lookupMaps
-        }
 
         logger.info("Executing patches")
 

src/main/kotlin/app/revanced/patcher/PatcherConfig.kt

@@ -12,16 +12,12 @@ import java.util.logging.Logger
  * @param temporaryFilesPath A path to a folder to store temporary files in.
  * @param aaptBinaryPath A path to a custom aapt binary.
  * @param frameworkFileDirectory A path to the directory to cache the framework file in.
- * @param multithreadingDexFileWriter Whether to use multiple threads for writing dex files.
- * This has impact on memory usage and performance.
  */
 class PatcherConfig(
     internal val apkFile: File,
     private val temporaryFilesPath: File = File("revanced-temporary-files"),
     aaptBinaryPath: String? = null,
     frameworkFileDirectory: String? = null,
-    @Deprecated("This is going to be removed in the future because it is not needed anymore.")
-    internal val multithreadingDexFileWriter: Boolean = false,
 ) {
     private val logger = Logger.getLogger(PatcherConfig::class.java.name)
 

src/main/kotlin/app/revanced/patcher/PatcherResult.kt

@@ -29,12 +29,12 @@ class PatcherResult internal constructor(
      * @param resourcesApk The compiled resources.apk file.
      * @param otherResources The directory containing other resources files.
      * @param doNotCompress List of files that should not be compressed.
-     * @param deleteResources List of predicates about resources that should be deleted.
+     * @param deleteResources List of resources that should be deleted.
      */
     class PatchedResources internal constructor(
         val resourcesApk: File?,
         val otherResources: File?,
         val doNotCompress: Set<String>,
-        val deleteResources: Set<(String) -> Boolean>,
+        val deleteResources: Set<String>,
     )
 }

src/main/kotlin/app/revanced/patcher/patch/BytecodePatchContext.kt

@@ -14,6 +14,7 @@ import com.android.tools.smali.dexlib2.iface.ClassDef
 import com.android.tools.smali.dexlib2.iface.DexFile
 import com.android.tools.smali.dexlib2.iface.Method
 import com.android.tools.smali.dexlib2.iface.instruction.ReferenceInstruction
+import com.android.tools.smali.dexlib2.iface.reference.MethodReference
 import com.android.tools.smali.dexlib2.iface.reference.StringReference
 import lanchon.multidexlib2.BasicDexFileNamer
 import lanchon.multidexlib2.DexIO
@@ -33,7 +34,7 @@ import java.util.logging.Logger
 class BytecodePatchContext internal constructor(private val config: PatcherConfig) :
     PatchContext<Set<PatcherResult.PatchedDexFile>>,
     Closeable {
-    private val logger = Logger.getLogger(BytecodePatchContext::class.java.name)
+    private val logger = Logger.getLogger(this::javaClass.name)
 
     /**
      * [Opcodes] of the supplied [PatcherConfig.apkFile].
@@ -59,54 +60,38 @@ class BytecodePatchContext internal constructor(private val config: PatcherConfi
     internal val lookupMaps by lazy { LookupMaps(classes) }
 
     /**
-     * Merge the extensions for this set of patches.
+     * Merge the extension of [bytecodePatch] into the [BytecodePatchContext].
+     * If no extension is present, the function will return early.
+     *
+     * @param bytecodePatch The [BytecodePatch] to merge the extension of.
      */
-    internal fun Set<Patch<*>>.mergeExtensions() {
+    internal fun mergeExtension(bytecodePatch: BytecodePatch) {
-        // Lookup map for fast checking if a class exists by its type.
+        bytecodePatch.extensionInputStream?.get()?.use { extensionStream ->
-        val classesByType = mutableMapOf<String, ClassDef>().apply {
+            RawDexIO.readRawDexFile(extensionStream, 0, null).classes.forEach { classDef ->
-            classes.forEach { classDef -> put(classDef.type, classDef) }
+                val existingClass = lookupMaps.classesByType[classDef.type] ?: run {
-        }
+                    logger.fine { "Adding class \"$classDef\"" }
 
-        forEachRecursively { patch ->
+                    classes += classDef
-            if (patch is BytecodePatch && patch.extension != null) {
+                    lookupMaps.classesByType[classDef.type] = classDef
 
-                val extension = patch.extension.readAllBytes()
+                    return@forEach
+                }
 
-                RawDexIO.readRawDexFile(extension, 0, null).classes.forEach { classDef ->
+                logger.fine { "Class \"$classDef\" exists already. Adding missing methods and fields." }
-                    val existingClass = classesByType[classDef.type] ?: run {
-                        logger.fine("Adding class \"$classDef\"")
 
-                        classes += classDef
+                existingClass.merge(classDef, this@BytecodePatchContext).let { mergedClass ->
-                        classesByType[classDef.type] = classDef
+                    // If the class was merged, replace the original class with the merged class.
-
+                    if (mergedClass === existingClass) {
-                        return@forEach
+                        return@let
                     }
 
-                    logger.fine("Class \"$classDef\" exists already. Adding missing methods and fields.")
+                    classes -= existingClass
-
+                    classes += mergedClass
-                    existingClass.merge(classDef, this@BytecodePatchContext).let { mergedClass ->
-                        // If the class was merged, replace the original class with the merged class.
-                        if (mergedClass === existingClass) {
-                            return@let
-                        }
-
-                        classes -= existingClass
-                        classes += mergedClass
-                    }
                 }
             }
-        }
+        } ?: logger.fine("No extension to merge")
     }
 
-    /**
-     * Find a class by its type using a contains check.
-     *
-     * @param type The type of the class.
-     * @return A proxy for the first class that matches the type.
-     */
-    @Deprecated("Use classBy { type in it.type } instead.", ReplaceWith("classBy { type in it.type }"))
-    fun classByType(type: String) = classBy { type in it.type }
-
     /**
      * Find a class with a predicate.
      *
@@ -123,9 +108,9 @@ class BytecodePatchContext internal constructor(private val config: PatcherConfi
      *
      * @return A proxy for the class.
      */
-    fun proxy(classDef: ClassDef) = this@BytecodePatchContext.classes.proxyPool.find {
+    fun proxy(classDef: ClassDef) = classes.proxyPool.find {
         it.immutableClass.type == classDef.type
-    } ?: ClassProxy(classDef).also { this@BytecodePatchContext.classes.proxyPool.add(it) }
+    } ?: ClassProxy(classDef).also { classes.proxyPool.add(it) }
 
     /**
      * Navigate a method.
@@ -134,7 +119,7 @@ class BytecodePatchContext internal constructor(private val config: PatcherConfi
      *
      * @return A [MethodNavigator] for the method.
      */
-    fun navigate(method: Method) = MethodNavigator(this@BytecodePatchContext, method)
+    fun navigate(method: MethodReference) = MethodNavigator(method)
 
     /**
      * Compile bytecode from the [BytecodePatchContext].
@@ -155,7 +140,7 @@ class BytecodePatchContext internal constructor(private val config: PatcherConfi
             }.apply {
                 MultiDexIO.writeDexFile(
                     true,
-                    if (config.multithreadingDexFileWriter) -1 else 1,
+                    -1,
                     this,
                     BasicDexFileNamer(),
                     object : DexFile {
@@ -165,7 +150,7 @@ class BytecodePatchContext internal constructor(private val config: PatcherConfi
                         override fun getOpcodes() = this@BytecodePatchContext.opcodes
                     },
                     DexIO.DEFAULT_MAX_DEX_POOL_SIZE,
-                ) { _, entryName, _ -> logger.info("Compiled $entryName") }
+                ) { _, entryName, _ -> logger.info { "Compiled $entryName" } }
             }.listFiles(FileFilter { it.isFile })!!.map {
                 PatcherResult.PatchedDexFile(it.name, it.inputStream())
             }.toSet()
@@ -186,6 +171,11 @@ class BytecodePatchContext internal constructor(private val config: PatcherConfi
          */
         internal val methodsByStrings = MethodClassPairsLookupMap()
 
+        // Lookup map for fast checking if a class exists by its type.
+        val classesByType = mutableMapOf<String, ClassDef>().apply {
+            classes.forEach { classDef -> put(classDef.type, classDef) }
+        }
+
         init {
             classes.forEach { classDef ->
                 classDef.methods.forEach { method ->
@@ -208,30 +198,9 @@ class BytecodePatchContext internal constructor(private val config: PatcherConfi
             }
         }
 
-        internal companion object {
-            /**
-             * Appends a string based on the parameter reference types of this method.
-             */
-            internal fun StringBuilder.appendParameters(parameters: Iterable<CharSequence>) {
-                // Maximum parameters to use in the signature key.
-                // Some apps have methods with an incredible number of parameters (over 100 parameters have been seen).
-                // To keep the signature map from becoming needlessly bloated,
-                // group together in the same map entry all methods with the same access/return and 5 or more parameters.
-                // The value of 5 was chosen based on local performance testing and is not set in stone.
-                val maxSignatureParameters = 5
-                // Must append a unique value before the parameters to distinguish this key includes the parameters.
-                // If this is not appended, then methods with no parameters
-                // will collide with different keys that specify access/return but omit the parameters.
-                append("p:")
-                parameters.forEachIndexed { index, parameter ->
-                    if (index >= maxSignatureParameters) return
-                    append(parameter.first())
-                }
-            }
-        }
-
         override fun close() {
             methodsByStrings.clear()
+            classesByType.clear()
         }
     }
 

src/main/kotlin/app/revanced/patcher/patch/Patch.kt

@@ -2,7 +2,6 @@
 
 package app.revanced.patcher.patch
 
-import app.revanced.patcher.Fingerprint
 import app.revanced.patcher.Patcher
 import app.revanced.patcher.PatcherContext
 import dalvik.system.DexClassLoader
@@ -14,8 +13,8 @@ import java.lang.reflect.Member
 import java.lang.reflect.Method
 import java.lang.reflect.Modifier
 import java.net.URLClassLoader
+import java.util.function.Supplier
 import java.util.jar.JarFile
-import kotlin.reflect.KProperty
 
 typealias PackageName = String
 typealias VersionName = String
@@ -46,10 +45,10 @@ sealed class Patch<C : PatchContext<*>>(
     val dependencies: Set<Patch<*>>,
     val compatiblePackages: Set<Package>?,
     options: Set<Option<*>>,
-    private val executeBlock: Patch<C>.(C) -> Unit,
+    private val executeBlock: (C) -> Unit,
     // Must be internal and nullable, so that Patcher.invoke can check,
     // if a patch has a finalizing block in order to not emit it twice.
-    internal var finalizeBlock: (Patch<C>.(C) -> Unit)?,
+    internal var finalizeBlock: ((C) -> Unit)?,
 ) {
     /**
      * The options of the patch.
@@ -57,38 +56,39 @@ sealed class Patch<C : PatchContext<*>>(
     val options = Options(options)
 
     /**
-     * Runs the execution block of the patch.
+     * Calls the execution block of the patch.
-     * Called by [Patcher].
+     * This function is called by [Patcher.invoke].
      *
      * @param context The [PatcherContext] to get the [PatchContext] from to execute the patch with.
      */
     internal abstract fun execute(context: PatcherContext)
 
     /**
-     * Runs the execution block of the patch.
+     * Calls the execution block of the patch.
      *
      * @param context The [PatchContext] to execute the patch with.
      */
     fun execute(context: C) = executeBlock(context)
 
     /**
-     * Runs the finalizing block of the patch.
+     * Calls the finalizing block of the patch.
-     * Called by [Patcher].
+     * This function is called by [Patcher.invoke].
      *
      * @param context The [PatcherContext] to get the [PatchContext] from to finalize the patch with.
      */
     internal abstract fun finalize(context: PatcherContext)
 
     /**
-     * Runs the finalizing block of the patch.
+     * Calls the finalizing block of the patch.
      *
      * @param context The [PatchContext] to finalize the patch with.
      */
     fun finalize(context: C) {
-        finalizeBlock?.invoke(this, context)
+        finalizeBlock?.invoke(context)
     }
 
-    override fun toString() = name ?: "Patch"
+    override fun toString() = name ?: 
+        "Patch@${System.identityHashCode(this)}"
 }
 
 internal fun Patch<*>.anyRecursively(
@@ -127,8 +127,7 @@ internal fun Iterable<Patch<*>>.forEachRecursively(
  * If null, the patch is compatible with all packages.
  * @param dependencies Other patches this patch depends on.
  * @param options The options of the patch.
- * @param fingerprints The fingerprints that are resolved before the patch is executed.
+ * @property extensionInputStream Getter for the extension input stream of the patch.
- * @property extension An input stream of the extension resource this patch uses.
  * An extension is a precompiled DEX file that is merged into the patched app before this patch is executed.
  * @param executeBlock The execution block of the patch.
  * @param finalizeBlock The finalizing block of the patch. Called after all patches have been executed,
@@ -143,10 +142,9 @@ class BytecodePatch internal constructor(
     compatiblePackages: Set<Package>?,
     dependencies: Set<Patch<*>>,
     options: Set<Option<*>>,
-    val fingerprints: Set<Fingerprint>,
+    val extensionInputStream: Supplier<InputStream>?,
-    val extension: InputStream?,
+    executeBlock: (BytecodePatchContext) -> Unit,
-    executeBlock: Patch<BytecodePatchContext>.(BytecodePatchContext) -> Unit,
+    finalizeBlock: ((BytecodePatchContext) -> Unit)?,
-    finalizeBlock: (Patch<BytecodePatchContext>.(BytecodePatchContext) -> Unit)?,
 ) : Patch<BytecodePatchContext>(
     name,
     description,
@@ -158,14 +156,13 @@ class BytecodePatch internal constructor(
     finalizeBlock,
 ) {
     override fun execute(context: PatcherContext) = with(context.bytecodeContext) {
-        fingerprints.forEach { it.match(this) }
+        mergeExtension(this@BytecodePatch)
-
         execute(this)
     }
 
     override fun finalize(context: PatcherContext) = finalize(context.bytecodeContext)
 
-    override fun toString() = name ?: "BytecodePatch"
+    override fun toString() = name ?: "Bytecode${super.toString()}"
 }
 
 /**
@@ -192,8 +189,8 @@ class RawResourcePatch internal constructor(
     compatiblePackages: Set<Package>?,
     dependencies: Set<Patch<*>>,
     options: Set<Option<*>>,
-    executeBlock: Patch<ResourcePatchContext>.(ResourcePatchContext) -> Unit,
+    executeBlock: (ResourcePatchContext) -> Unit,
-    finalizeBlock: (Patch<ResourcePatchContext>.(ResourcePatchContext) -> Unit)?,
+    finalizeBlock: ((ResourcePatchContext) -> Unit)?,
 ) : Patch<ResourcePatchContext>(
     name,
     description,
@@ -208,7 +205,7 @@ class RawResourcePatch internal constructor(
 
     override fun finalize(context: PatcherContext) = finalize(context.resourceContext)
 
-    override fun toString() = name ?: "RawResourcePatch"
+    override fun toString() = name ?: "RawResource${super.toString()}"
 }
 
 /**
@@ -235,8 +232,8 @@ class ResourcePatch internal constructor(
     compatiblePackages: Set<Package>?,
     dependencies: Set<Patch<*>>,
     options: Set<Option<*>>,
-    executeBlock: Patch<ResourcePatchContext>.(ResourcePatchContext) -> Unit,
+    executeBlock: (ResourcePatchContext) -> Unit,
-    finalizeBlock: (Patch<ResourcePatchContext>.(ResourcePatchContext) -> Unit)?,
+    finalizeBlock: ((ResourcePatchContext) -> Unit)?,
 ) : Patch<ResourcePatchContext>(
     name,
     description,
@@ -251,7 +248,7 @@ class ResourcePatch internal constructor(
 
     override fun finalize(context: PatcherContext) = finalize(context.resourceContext)
 
-    override fun toString() = name ?: "ResourcePatch"
+    override fun toString() = name ?: "Resource${super.toString()}"
 }
 
 /**
@@ -281,8 +278,8 @@ sealed class PatchBuilder<C : PatchContext<*>>(
     protected var dependencies = mutableSetOf<Patch<*>>()
     protected val options = mutableSetOf<Option<*>>()
 
-    protected var executionBlock: (Patch<C>.(C) -> Unit) = { }
+    protected var executionBlock: ((C) -> Unit) = { }
-    protected var finalizeBlock: (Patch<C>.(C) -> Unit)? = null
+    protected var finalizeBlock: ((C) -> Unit)? = null
 
     /**
      * Add an option to the patch.
@@ -341,7 +338,7 @@ sealed class PatchBuilder<C : PatchContext<*>>(
      *
      * @param block The execution block of the patch.
      */
-    fun execute(block: Patch<C>.(C) -> Unit) {
+    fun execute(block: C.() -> Unit) {
         executionBlock = block
     }
 
@@ -350,7 +347,7 @@ sealed class PatchBuilder<C : PatchContext<*>>(
      *
      * @param block The finalizing block of the patch.
      */
-    fun finalize(block: Patch<C>.(C) -> Unit) {
+    fun finalize(block: C.() -> Unit) {
         finalizeBlock = block
     }
 
@@ -379,8 +376,7 @@ private fun <B : PatchBuilder<*>> B.buildPatch(block: B.() -> Unit = {}) = apply
  * If null, the patch is named "Patch" and will not be loaded by [PatchLoader].
  * @param description The description of the patch.
  * @param use Weather or not the patch should be used.
- * @property fingerprints The fingerprints that are resolved before the patch is executed.
+ * @property extensionInputStream Getter for the extension input stream of the patch.
- * @property extension An input stream of the extension resource this patch uses.
  * An extension is a precompiled DEX file that is merged into the patched app before this patch is executed.
  *
  * @constructor Create a new [BytecodePatchBuilder] builder.
@@ -390,27 +386,9 @@ class BytecodePatchBuilder internal constructor(
     description: String?,
     use: Boolean,
 ) : PatchBuilder<BytecodePatchContext>(name, description, use) {
-    private val fingerprints = mutableSetOf<Fingerprint>()
-
-    /**
-     * Add the fingerprint to the patch.
-     *
-     * @return A wrapper for the fingerprint with the ability to delegate the match to the fingerprint.
-     */
-    operator fun Fingerprint.invoke() = InvokedFingerprint(also { fingerprints.add(it) })
-
-    class InvokedFingerprint internal constructor(private val fingerprint: Fingerprint) {
-        // The reason getValue isn't extending the Fingerprint class is
-        // because delegating makes only sense if the fingerprint was previously added to the patch by invoking it.
-        // It may be likely to forget invoking it. By wrapping the fingerprint into this class,
-        // the compiler will throw an error if the fingerprint was not invoked if attempting to delegate the match.
-        operator fun getValue(nothing: Nothing?, property: KProperty<*>) = fingerprint.match
-            ?: throw PatchException("No fingerprint match to delegate to \"${property.name}\".")
-    }
-
     // Must be internal for the inlined function "extendWith".
     @PublishedApi
-    internal var extension: InputStream? = null
+    internal var extensionInputStream: Supplier<InputStream>? = null
 
     // Inlining is necessary to get the class loader that loaded the patch
     // to load the extension from the resources.
@@ -421,8 +399,11 @@ class BytecodePatchBuilder internal constructor(
      */
     @Suppress("NOTHING_TO_INLINE")
     inline fun extendWith(extension: String) = apply {
-        this.extension = object {}.javaClass.classLoader.getResourceAsStream(extension)
+        val classLoader = object {}.javaClass.classLoader
-            ?: throw PatchException("Extension \"$extension\" not found")
+
+        extensionInputStream = Supplier {
+            classLoader.getResourceAsStream(extension) ?: throw PatchException("Extension \"$extension\" not found")
+        }
     }
 
     override fun build() = BytecodePatch(
@@ -432,8 +413,7 @@ class BytecodePatchBuilder internal constructor(
         compatiblePackages,
         dependencies,
         options,
-        fingerprints,
+        extensionInputStream,
-        extension,
         executionBlock,
         finalizeBlock,
     )

src/main/kotlin/app/revanced/patcher/patch/ResourcePatchContext.kt

@@ -32,14 +32,19 @@ class ResourcePatchContext internal constructor(
     private val logger = Logger.getLogger(ResourcePatchContext::class.java.name)
 
     /**
-     * Read and write documents in the [PatcherConfig.apkFiles].
+     * Read a document from an [InputStream].
      */
-    val document = DocumentOperatable()
+    fun document(inputStream: InputStream) = Document(inputStream)
 
     /**
-     * Predicate to delete resources from [PatcherConfig.apkFiles].
+     * Read and write documents in the [PatcherConfig.apkFiles].
      */
-    private val deleteResources = mutableSetOf<(String) -> Boolean>()
+    fun document(path: String) = Document(get(path))
+
+    /**
+     * Set of resources from [PatcherConfig.apkFiles] to delete.
+     */
+    private val deleteResources = mutableSetOf<String>()
 
     /**
      * Decode resources of [PatcherConfig.apkFile].
@@ -201,11 +206,11 @@ class ResourcePatchContext internal constructor(
     }
 
     /**
-     * Stage a file to be deleted from [PatcherConfig.apkFile].
+     * Mark a file for deletion when the APK is rebuilt.
      *
-     * @param shouldDelete The predicate to stage the file for deletion given its name.
+     * @param name The name of the file to delete.
      */
-    fun stageDelete(shouldDelete: (String) -> Boolean) = deleteResources.add(shouldDelete)
+    fun delete(name: String) = deleteResources.add(name)
 
     /**
      * How to handle resources decoding and compiling.
@@ -227,10 +232,4 @@ class ResourcePatchContext internal constructor(
          */
         NONE,
     }
-
-    inner class DocumentOperatable {
-        operator fun get(inputStream: InputStream) = Document(inputStream)
-
-        operator fun get(path: String) = Document(this@ResourcePatchContext[path])
-    }
 }

src/main/kotlin/app/revanced/patcher/util/ClassMerger.kt

@@ -60,7 +60,7 @@ internal object ClassMerger {
 
         if (missingMethods.isEmpty()) return this
 
-        logger.fine("Found ${missingMethods.size} missing methods")
+        logger.fine { "Found ${missingMethods.size} missing methods" }
 
         return asMutableClass().apply {
             methods.addAll(missingMethods.map { it.toMutable() })
@@ -80,7 +80,7 @@ internal object ClassMerger {
 
         if (missingFields.isEmpty()) return this
 
-        logger.fine("Found ${missingFields.size} missing fields")
+        logger.fine { "Found ${missingFields.size} missing fields" }
 
         return asMutableClass().apply {
             fields.addAll(missingFields.map { it.toMutable() })
@@ -100,7 +100,7 @@ internal object ClassMerger {
             context.traverseClassHierarchy(this) {
                 if (accessFlags.isPublic()) return@traverseClassHierarchy
 
-                logger.fine("Publicizing ${this.type}")
+                logger.fine { "Publicizing ${this.type}" }
 
                 accessFlags = accessFlags.toPublic()
             }
@@ -124,7 +124,7 @@ internal object ClassMerger {
 
         if (brokenFields.isEmpty()) return this
 
-        logger.fine("Found ${brokenFields.size} broken fields")
+        logger.fine { "Found ${brokenFields.size} broken fields" }
 
         /**
          * Make a field public.
@@ -153,7 +153,7 @@ internal object ClassMerger {
 
         if (brokenMethods.isEmpty()) return this
 
-        logger.fine("Found ${brokenMethods.size} methods")
+        logger.fine { "Found ${brokenMethods.size} methods" }
 
         /**
          * Make a method public.

src/main/kotlin/app/revanced/patcher/util/MethodNavigator.kt

@@ -12,11 +12,11 @@ import com.android.tools.smali.dexlib2.iface.instruction.Instruction
 import com.android.tools.smali.dexlib2.iface.instruction.ReferenceInstruction
 import com.android.tools.smali.dexlib2.iface.reference.MethodReference
 import com.android.tools.smali.dexlib2.util.MethodUtil
+import kotlin.reflect.KProperty
 
 /**
  * A navigator for methods.
  *
- * @param context The [BytecodePatchContext] to use.
  * @param startMethod The [Method] to start navigating from.
  *
  * @constructor Creates a new [MethodNavigator].
@@ -24,12 +24,16 @@ import com.android.tools.smali.dexlib2.util.MethodUtil
  * @throws NavigateException If the method does not have an implementation.
  * @throws NavigateException If the instruction at the specified index is not a method reference.
  */
-class MethodNavigator internal constructor(private val context: BytecodePatchContext, private var startMethod: MethodReference) {
+context(BytecodePatchContext)
+class MethodNavigator internal constructor(
+    private var startMethod: MethodReference,
+) {
     private var lastNavigatedMethodReference = startMethod
 
-    private val lastNavigatedMethodInstructions get() = with(immutable()) {
+    private val lastNavigatedMethodInstructions
-        instructionsOrNull ?: throw NavigateException("Method $definingClass.$name does not have an implementation.")
+        get() = with(original()) {
-    }
+            instructionsOrNull ?: throw NavigateException("Method $this does not have an implementation.")
+        }
 
     /**
      * Navigate to the method at the specified index.
@@ -38,7 +42,7 @@ class MethodNavigator internal constructor(private val context: BytecodePatchCon
      *
      * @return This [MethodNavigator].
      */
-    fun at(vararg index: Int): MethodNavigator {
+    fun to(vararg index: Int): MethodNavigator {
         index.forEach {
             lastNavigatedMethodReference = lastNavigatedMethodInstructions.getMethodReferenceAt(it)
         }
@@ -52,7 +56,7 @@ class MethodNavigator internal constructor(private val context: BytecodePatchCon
      * @param index The index of the method to navigate to.
      * @param predicate The predicate to match.
      */
-    fun at(index: Int = 0, predicate: (Instruction) -> Boolean): MethodNavigator {
+    fun to(index: Int = 0, predicate: (Instruction) -> Boolean): MethodNavigator {
         lastNavigatedMethodReference = lastNavigatedMethodInstructions.asSequence()
             .filter(predicate).asIterable().getMethodReferenceAt(index)
 
@@ -76,15 +80,22 @@ class MethodNavigator internal constructor(private val context: BytecodePatchCon
      *
      * @return The last navigated method mutably.
      */
-    fun mutable() = context.classBy(matchesCurrentMethodReferenceDefiningClass)!!.mutableClass.firstMethodBySignature
+    fun stop() = classBy(matchesCurrentMethodReferenceDefiningClass)!!.mutableClass.firstMethodBySignature
         as MutableMethod
 
+    /**
+     * Get the last navigated method mutably.
+     *
+     * @return The last navigated method mutably.
+     */
+    operator fun getValue(nothing: Nothing?, property: KProperty<*>) = stop()
+
     /**
      * Get the last navigated method immutably.
      *
      * @return The last navigated method immutably.
      */
-    fun immutable() = context.classes.first(matchesCurrentMethodReferenceDefiningClass).firstMethodBySignature
+    fun original(): Method = classes.first(matchesCurrentMethodReferenceDefiningClass).firstMethodBySignature
 
     /**
      * Predicate to match the class defining the current method reference.
@@ -96,9 +107,10 @@ class MethodNavigator internal constructor(private val context: BytecodePatchCon
     /**
      * Find the first [lastNavigatedMethodReference] in the class.
      */
-    private val ClassDef.firstMethodBySignature get() = methods.first {
+    private val ClassDef.firstMethodBySignature
-        MethodUtil.methodSignaturesMatch(it, lastNavigatedMethodReference)
+        get() = methods.first {
-    }
+            MethodUtil.methodSignaturesMatch(it, lastNavigatedMethodReference)
+        }
 
     /**
      * An exception thrown when navigating fails.

src/test/kotlin/app/revanced/patcher/PatcherTest.kt

@@ -5,18 +5,15 @@ import app.revanced.patcher.patch.BytecodePatchContext.LookupMaps
 import app.revanced.patcher.util.ProxyClassList
 import com.android.tools.smali.dexlib2.immutable.ImmutableClassDef
 import com.android.tools.smali.dexlib2.immutable.ImmutableMethod
-import io.mockk.every
+import io.mockk.*
-import io.mockk.just
-import io.mockk.mockk
-import io.mockk.runs
 import kotlinx.coroutines.flow.toList
 import kotlinx.coroutines.runBlocking
 import org.junit.jupiter.api.BeforeEach
-import org.junit.jupiter.api.assertDoesNotThrow
+import org.junit.jupiter.api.assertAll
 import java.util.logging.Logger
 import kotlin.test.Test
 import kotlin.test.assertEquals
-import kotlin.test.assertNull
+import kotlin.test.assertNotNull
 import kotlin.test.assertTrue
 
 internal object PatcherTest {
@@ -151,19 +148,15 @@ internal object PatcherTest {
     @Test
     fun `throws if unmatched fingerprint match is delegated`() {
         val patch = bytecodePatch {
-            // Fingerprint can never match.
-            val match by fingerprint { }
-            // Manually add the fingerprint.
-            app.revanced.patcher.fingerprint { }()
-
             execute {
+                // Fingerprint can never match.
+                val fingerprint = fingerprint { }
+
                 // Throws, because the fingerprint can't be matched.
-                match.patternMatch
+                fingerprint.patternMatch
             }
         }
 
-        assertEquals(2, patch.fingerprints.size)
-
         assertTrue(
             patch().exception != null,
             "Expected an exception because the fingerprint can't match.",
@@ -172,44 +165,6 @@ internal object PatcherTest {
 
     @Test
     fun `matches fingerprint`() {
-        mockClassWithMethod()
-
-        val patches = setOf(bytecodePatch { fingerprint { this returns "V" } })
-
-        assertNull(
-            patches.first().fingerprints.first().match,
-            "Expected fingerprint to be matched before execution.",
-        )
-
-        patches()
-
-        assertDoesNotThrow("Expected fingerprint to be matched.") {
-            assertEquals(
-                "V",
-                patches.first().fingerprints.first().match!!.method.returnType,
-                "Expected fingerprint to be matched.",
-            )
-        }
-    }
-
-    private operator fun Set<Patch<*>>.invoke(): List<PatchResult> {
-        every { patcher.context.executablePatches } returns toMutableSet()
-        every { patcher.context.bytecodeContext.lookupMaps } returns LookupMaps(patcher.context.bytecodeContext.classes)
-        every { with(patcher.context.bytecodeContext) { any<Set<Patch<*>>>().mergeExtensions() } } just runs
-
-        return runBlocking { patcher().toList() }
-    }
-
-    private operator fun Patch<*>.invoke() = setOf(this)().first()
-
-    private fun Any.setPrivateField(field: String, value: Any) {
-        this::class.java.getDeclaredField(field).apply {
-            this.isAccessible = true
-            set(this@setPrivateField, value)
-        }
-    }
-
-    private fun mockClassWithMethod() {
         every { patcher.context.bytecodeContext.classes } returns ProxyClassList(
             mutableListOf(
                 ImmutableClassDef(
@@ -235,6 +190,47 @@ internal object PatcherTest {
                 ),
             ),
         )
+
+        val fingerprint = fingerprint { returns("V") }
+        val fingerprint2 = fingerprint { returns("V") }
+        val fingerprint3 = fingerprint { returns("V") }
+
+        val patches = setOf(
+            bytecodePatch {
+                execute {
+                    fingerprint.match(classes.first().methods.first())
+                    fingerprint2.match(classes.first())
+                    fingerprint3.originalClassDef
+                }
+            },
+        )
+
+        patches()
+
+        with(patcher.context.bytecodeContext) {
+            assertAll(
+                "Expected fingerprints to match.",
+                { assertNotNull(fingerprint.originalClassDefOrNull) },
+                { assertNotNull(fingerprint2.originalClassDefOrNull) },
+                { assertNotNull(fingerprint3.originalClassDefOrNull) },
+            )
+        }
+    }
+
+    private operator fun Set<Patch<*>>.invoke(): List<PatchResult> {
+        every { patcher.context.executablePatches } returns toMutableSet()
         every { patcher.context.bytecodeContext.lookupMaps } returns LookupMaps(patcher.context.bytecodeContext.classes)
+        every { with(patcher.context.bytecodeContext) { mergeExtension(any<BytecodePatch>()) } } just runs
+
+        return runBlocking { patcher().toList() }
+    }
+
+    private operator fun Patch<*>.invoke() = setOf(this)().first()
+
+    private fun Any.setPrivateField(field: String, value: Any) {
+        this::class.java.getDeclaredField(field).apply {
+            this.isAccessible = true
+            set(this@setPrivateField, value)
+        }
     }
 }

src/test/kotlin/app/revanced/patcher/patch/PatchTest.kt

@@ -1,6 +1,5 @@
 package app.revanced.patcher.patch
 
-import app.revanced.patcher.fingerprint
 import kotlin.test.Test
 import kotlin.test.assertEquals
 
@@ -24,23 +23,6 @@ internal object PatchTest {
         assertEquals("compatible.package", patch.compatiblePackages!!.first().first)
     }
 
-    @Test
-    fun `can create patch with fingerprints`() {
-        val externalFingerprint = fingerprint {}
-
-        val patch = bytecodePatch(name = "Test") {
-            val externalFingerprintMatch by externalFingerprint()
-            val internalFingerprintMatch by fingerprint {}
-
-            execute {
-                externalFingerprintMatch.method
-                internalFingerprintMatch.method
-            }
-        }
-
-        assertEquals(2, patch.fingerprints.size)
-    }
-
     @Test
     fun `can create patch with dependencies`() {
         val patch = bytecodePatch(name = "Test") {