chore(release): 4.1.0 [skip ci]

# [4.1.0](https://github.com/revanced/revanced-patcher/compare/v4.0.0...v4.1.0) (2022-09-07)

### Features

* deprecation for patches ([80c2e80](80c2e80925))

.github/ISSUE_TEMPLATE/bug-issue.yml

@@ -0,0 +1,60 @@
+name: 🐞 Bug report
+description: Report a very clearly broken issue.
+title: 'bug: <title>'
+labels: [bug]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        # ReVanced bug report
+
+        Important to note that your issue may have already been reported before. Please check for existing issues [here](https://github.com/revanced/revanced-patcher/labels/bug).
+
+  - type: dropdown
+    attributes:
+      label: Type
+      options:
+        - Crash
+        - Cosmetic
+        - Other
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Bug description
+      description: How did you find the bug? Any additional details that might help?
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Steps to reproduce
+      description: Add the steps to reproduce this bug including your environment.
+      placeholder: Step 1. Download some files. Step 2. ...
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Relevant log output
+      description: Please copy and paste any relevant log output. This will be automatically formatted into code, so no need for backticks.
+      render: shell
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Screenshots or videos
+      description: Add screenshots or videos that show the bug here.
+      placeholder: Drag and drop the screenshots/videos into this box.
+    validations:
+      required: false
+  - type: textarea
+    attributes:
+      label: Solution
+      description: If applicable, add a possible solution.
+    validations:
+      required: false
+  - type: textarea
+    attributes:
+      label: Additional context
+      description: Add additional context here.
+    validations:
+      required: false

.github/ISSUE_TEMPLATE/bug-report.md

@@ -1,24 +0,0 @@
----
-name: Bug report
-about: Create a bug report on the patcher. Do not submit suggestions for patches here.
-title: 'problem: some problem'
-labels: bug
-assignees: oSumAtrIX, Sculas
-
----
-
-## 🐞 Issue
-
-<!-- Describe your issue in detail here -->
-
-## ⚙ Reproduce
-
-<!-- Include your environment and steps to reproduce the issue as detailed as possible -->
-
-## 🛠 Solution
-
-<!-- If applicable, add a possible solution -->
-
-## ⚠ Additional context
-
-<!-- Add any other context about the problem here -->

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,8 @@
+blank_issues_enabled: false
+contact_links:
+  - name: 📃 Documentation
+    url: https://github.com/revanced/revanced-documentation/
+    about: Don't know how or where to start? Check out our documentation!
+  - name: 🗨 Discussions
+    url: https://github.com/revanced/revanced-suggestions/discussions
+    about: Got something you think should change or be added? Search for or start a new discussion!

.github/ISSUE_TEMPLATE/feature-issue.yml

@@ -0,0 +1,46 @@
+name: ⭐ Feature request
+description: Create a detailed feature request.
+title: 'feat: <title>'
+labels: [feature-request]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        # ReVanced feature request
+        
+        Do not submit requests for patches here. Please submit them [here](https://github.com/orgs/revanced/discussions/categories/patches) instead.
+        Important to note that your feature request may have already been made before. Please check for existing feature requests [here](https://github.com/revanced/revanced-patcher/labels/feature-request).
+
+  - type: dropdown
+    attributes:
+      label: Type
+      options:
+        - Functionality
+        - Cosmetic
+        - Other
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Issue
+      description: What is the current problem. Why does it require a feature request?
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Feature
+      description: Describe your feature in detail. How does it solve the issue?
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Motivation
+      description: Why should your feature should be considered?
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Additional context
+      description: Add additional context here.
+    validations:
+      required: false

.github/ISSUE_TEMPLATE/feature_request.md

@@ -1,24 +0,0 @@
----
-name: Feature request
-about: Suggest a change for the patcher. Do not submit suggestions for patches here.
-title: 'feat: some feature'
-labels: feature-request
-assignees: ''
-
----
-
-## 🐞 Issue
-
-<!-- Explain here, what the current problem is and why it leads you to request a feature change -->
-
-## ❗ Solution
-
-<!-- Explain how your current issue can be solved -->
-
-## ❓ Motivation
-
-<!-- Explain why your feature should be considered -->
-
-## ⚠ Additional context
-
-<!-- Add any other context or screenshots about the feature request here -->

CHANGELOG.md

@@ -1,3 +1,157 @@
+# [4.1.0](https://github.com/revanced/revanced-patcher/compare/v4.0.0...v4.1.0) (2022-09-07)
+
+
+### Features
+
+* deprecation for patches ([80c2e80](https://github.com/revanced/revanced-patcher/commit/80c2e809251cdb04d2dd3b3bfdbb8844bdfa31fa))
+
+# [4.0.0](https://github.com/revanced/revanced-patcher/compare/v3.5.1...v4.0.0) (2022-09-07)
+
+
+### Code Refactoring
+
+* Improve Patch Options ([6b909c1](https://github.com/revanced/revanced-patcher/commit/6b909c1ee6b8c2ea08bbca059df755e2e5f31656))
+
+
+### BREAKING CHANGES
+
+* Options has been moved from Patch to a new interface called OptionsContainer and are now handled entirely different. Make sure to check the examples to understand how it works.
+
+## [3.5.1](https://github.com/revanced/revanced-patcher/compare/v3.5.0...v3.5.1) (2022-09-06)
+
+
+### Bug Fixes
+
+* add tests for PathOption ([d6308e1](https://github.com/revanced/revanced-patcher/commit/d6308e126c6217b098192c51b6e98bc85a8656bd))
+* PathOption should be open, not sealed ([a562e47](https://github.com/revanced/revanced-patcher/commit/a562e476c085841efbc7ee98b01d8e6bb18ed757))
+* typo in ListOption ([3921648](https://github.com/revanced/revanced-patcher/commit/392164862c83d6e76b2a2113d6f6d59fef0020d1))
+
+
+### Performance Improvements
+
+* make exception an object ([75d2be8](https://github.com/revanced/revanced-patcher/commit/75d2be88037c9cf5436ab69d92abea575409a865))
+
+# [3.5.0](https://github.com/revanced/revanced-patcher/compare/v3.4.1...v3.5.0) (2022-09-05)
+
+
+### Features
+
+* default value for `Package.versions` annotation parameter ([131dedd](https://github.com/revanced/revanced-patcher/commit/131dedd4b021fe1c3b0be49ccba4764b325770ea))
+
+## [3.4.1](https://github.com/revanced/revanced-patcher/compare/v3.4.0...v3.4.1) (2022-09-03)
+
+
+### Bug Fixes
+
+* remove default param from Package.versions ([4b81318](https://github.com/revanced/revanced-patcher/commit/4b813187107e85dc267dbc2d353884b2cc671cc4))
+
+# [3.4.0](https://github.com/revanced/revanced-patcher/compare/v3.3.3...v3.4.0) (2022-08-31)
+
+
+### Features
+
+* nullable parameters ([7882a8d](https://github.com/revanced/revanced-patcher/commit/7882a8d928cad8de8cfea711947fc02659549d20))
+
+## [3.3.3](https://github.com/revanced/revanced-patcher/compare/v3.3.2...v3.3.3) (2022-08-14)
+
+
+### Bug Fixes
+
+* show error message if cause is null ([f9da2ad](https://github.com/revanced/revanced-patcher/commit/f9da2ad531644617ad5a2cc6a1819d530e18ba22))
+
+## [3.3.2](https://github.com/revanced/revanced-patcher/compare/v3.3.1...v3.3.2) (2022-08-06)
+
+
+### Bug Fixes
+
+* close open files ([#75](https://github.com/revanced/revanced-patcher/issues/75)) ([123ad54](https://github.com/revanced/revanced-patcher/commit/123ad54c150bd04f4b8ef5c65334ea468ceb99cc))
+
+## [3.3.1](https://github.com/revanced/revanced-patcher/compare/v3.3.0...v3.3.1) (2022-08-03)
+
+
+### Bug Fixes
+
+* revert soft dependencies ([7b2d058](https://github.com/revanced/revanced-patcher/commit/7b2d058144b0718992d329731e2af7cc704e4370))
+
+# [3.3.0](https://github.com/revanced/revanced-patcher/compare/v3.2.1...v3.3.0) (2022-08-02)
+
+
+### Features
+
+* add getValue & setValue for PatchOption ([2572cd0](https://github.com/revanced/revanced-patcher/commit/2572cd04b5da4eeae738c8dde31493177edf0bf8))
+
+## [3.2.1](https://github.com/revanced/revanced-patcher/compare/v3.2.0...v3.2.1) (2022-08-02)
+
+
+### Bug Fixes
+
+* check if patch option requirement is met ([14a73bf](https://github.com/revanced/revanced-patcher/commit/14a73bfcafac36bce2b8466788d460edde7a14fd))
+
+# [3.2.0](https://github.com/revanced/revanced-patcher/compare/v3.1.0...v3.2.0) (2022-08-02)
+
+
+### Features
+
+* PatchOptions#nullify to nullify an option ([371f0c4](https://github.com/revanced/revanced-patcher/commit/371f0c4d0bf96e7f6db35085efccaed3000a096c))
+
+# [3.1.0](https://github.com/revanced/revanced-patcher/compare/v3.0.0...v3.1.0) (2022-08-02)
+
+
+### Features
+
+* validator for patch options ([4e2e772](https://github.com/revanced/revanced-patcher/commit/4e2e77238957d7732326cfe5e05145bf7dab5bfb))
+
+# [3.0.0](https://github.com/revanced/revanced-patcher/compare/v2.9.0...v3.0.0) (2022-08-02)
+
+
+### Features
+
+* registry for patch options ([2431785](https://github.com/revanced/revanced-patcher/commit/2431785d0e494d6271c6951eec9adfff9db95c17))
+
+
+### BREAKING CHANGES
+
+* Patch options now use the PatchOptions registry class instead of an Iterable. This change requires modifications to existing patches using this API.
+
+# [2.9.0](https://github.com/revanced/revanced-patcher/compare/v2.8.0...v2.9.0) (2022-08-02)
+
+
+### Bug Fixes
+
+* show error message instead of `null` ([8d95b14](https://github.com/revanced/revanced-patcher/commit/8d95b14f350b47ec029f35e776f6e627aaf5f607))
+
+
+### Features
+
+* exclusive mutable access to files ([814ce0b](https://github.com/revanced/revanced-patcher/commit/814ce0b9ae29725417c86b7d11b40d025724a426))
+
+# [2.8.0](https://github.com/revanced/revanced-patcher/compare/v2.7.0...v2.8.0) (2022-08-01)
+
+
+### Bug Fixes
+
+* remove requirement for solution [skip ci] ([#80](https://github.com/revanced/revanced-patcher/issues/80)) ([9a4d30e](https://github.com/revanced/revanced-patcher/commit/9a4d30e15234ef62844f035c58a1143674d4c12e))
+
+
+### Features
+
+* patch options ([#81](https://github.com/revanced/revanced-patcher/issues/81)) ([fbb09f3](https://github.com/revanced/revanced-patcher/commit/fbb09f38dce49adc7f63b71bdf2df2ef0b84db04))
+
+# [2.7.0](https://github.com/revanced/revanced-patcher/compare/v2.6.0...v2.7.0) (2022-08-01)
+
+
+### Features
+
+* `Closeable` patches ([bbd40bf](https://github.com/revanced/revanced-patcher/commit/bbd40bf2f6ff200705f2bcb272dd1680bb244e3f))
+
+# [2.6.0](https://github.com/revanced/revanced-patcher/compare/v2.5.2...v2.6.0) (2022-07-31)
+
+
+### Features
+
+* add Patch#dependsOn extension ([523f67b](https://github.com/revanced/revanced-patcher/commit/523f67b238646caaa9b7676a0e238ce82adbdda4))
+* Soft Dependencies for Patches ([8c12f8d](https://github.com/revanced/revanced-patcher/commit/8c12f8d488f939cc932e826aad0b20876ae165b7))
+
 ## [2.5.2](https://github.com/revanced/revanced-patcher/compare/v2.5.1...v2.5.2) (2022-07-24)
 
 ## [2.5.1](https://github.com/revanced/revanced-patcher/compare/v2.5.0...v2.5.1) (2022-07-17)

README.md

@@ -1 +1,2 @@
 # Patcher
+Patcher framework used in the ReVanced project.

build.gradle.kts

@@ -26,6 +26,7 @@ dependencies {
     implementation("app.revanced:multidexlib2:2.5.2.r2")
     implementation("org.apktool:apktool-lib:2.7.0-SNAPSHOT")
 
+    implementation(kotlin("reflect"))
     testImplementation(kotlin("test"))
 }
 

gradle.properties

@@ -1,2 +1,2 @@
 kotlin.code.style = official
-version = 2.5.2
+version = 4.1.0

src/main/kotlin/app/revanced/patcher/annotation/CompatibilityAnnotation.kt

@@ -24,5 +24,5 @@ annotation class Compatibility(
 @MustBeDocumented
 annotation class Package(
     val name: String,
-    val versions: Array<String>
+    val versions: Array<String> = [],
-)
+)

src/main/kotlin/app/revanced/patcher/annotation/Deprecated.kt

@@ -0,0 +1,20 @@
+package app.revanced.patcher.annotation
+
+import app.revanced.patcher.data.Data
+import app.revanced.patcher.patch.Patch
+import kotlin.reflect.KClass
+
+/**
+ * Declares a [Patch] deprecated for removal.
+ * @param reason The reason why the patch is deprecated.
+ * @param replacement The replacement for the deprecated patch, if any.
+ */
+@Target(AnnotationTarget.CLASS)
+@Retention(AnnotationRetention.RUNTIME)
+@MustBeDocumented
+@Repeatable
+annotation class PatchDeprecated(
+    val reason: String,
+    val replacement: KClass<out Patch<Data>> = Patch::class
+    // Values cannot be nullable in annotations, so this will have to do.
+)

src/main/kotlin/app/revanced/patcher/data/impl/ResourceData.kt

@@ -19,31 +19,66 @@ class ResourceData(private val resourceCacheDirectory: File) : Data, Iterable<Fi
     override fun iterator() = resourceCacheDirectory.walkTopDown().iterator()
 
     inner class XmlFileHolder {
-        operator fun get(inputStream: InputStream, outputStream: OutputStream) =
+        operator fun get(inputStream: InputStream) =
-            DomFileEditor(inputStream, lazyOf(outputStream))
+            DomFileEditor(inputStream)
+
+        operator fun get(path: String): DomFileEditor {
+            return DomFileEditor(this@ResourceData[path])
+        }
 
-        operator fun get(path: String) = DomFileEditor(this@ResourceData[path])
     }
 }
 
+/**
+ * DomFileEditor is a wrapper for a file that can be edited as a dom document.
+ *
+ * @param inputStream the input stream to read the xml file from.
+ * @param outputStream the output stream to write the xml file to. If null, the file will not be written.
+ */
 class DomFileEditor internal constructor(
     private val inputStream: InputStream,
-    private val outputStream: Lazy<OutputStream>,
+    private val outputStream: Lazy<OutputStream>? = null,
 ) : Closeable {
+    // path to the xml file to unlock the resource when closing the editor
+    private var filePath: String? = null
+
+    /**
+     * The document of the xml file
+     */
     val file: Document = DocumentBuilderFactory.newInstance().newDocumentBuilder().parse(inputStream)
         .also(Document::normalize)
 
     // lazily open an output stream
     // this is required because when constructing a DomFileEditor the output stream is created along with the input stream, which is not allowed
     // the workaround is to lazily create the output stream. This way it would be used after the input stream is closed, which happens in the constructor
-    constructor(file: File) : this(file.inputStream(), lazy { file.outputStream() })
+    constructor(file: File) : this(file.inputStream(), lazy { file.outputStream() }) {
+        filePath = file.path
 
-    override fun close() {
+        // prevent sharing mutability of the same file between multiple instances of DomFileEditor
-        val result = StreamResult(outputStream.value)
+        if (locks.contains(filePath))
-        TransformerFactory.newInstance().newTransformer().transform(DOMSource(file), result)
+            throw IllegalStateException("Can not create a DomFileEditor for that file because it is already locked by another instance of DomFileEditor.")
-
+        locks.add(filePath!!)
-        inputStream.close()
-        outputStream.value.close()
     }
 
+    override fun close() {
+        inputStream.close()
+
+        // if the output stream is not null, do not close it
+        outputStream?.let {
+            val result = StreamResult(it.value)
+            TransformerFactory.newInstance().newTransformer().transform(DOMSource(file), result)
+
+            it.value.close()
+        }
+
+        // remove the lock, if it exists
+        filePath?.let {
+            locks.remove(it)
+        }
+    }
+
+    private companion object {
+        // list of locked file paths
+        val locks = mutableListOf<String>()
+    }
 }

src/main/kotlin/app/revanced/patcher/extensions/AnnotationExtensions.kt

@@ -1,13 +1,12 @@
 package app.revanced.patcher.extensions
 
-import app.revanced.patcher.annotation.Compatibility
+import app.revanced.patcher.annotation.*
-import app.revanced.patcher.annotation.Description
-import app.revanced.patcher.annotation.Name
-import app.revanced.patcher.annotation.Version
 import app.revanced.patcher.data.Data
 import app.revanced.patcher.fingerprint.method.impl.MethodFingerprint
+import app.revanced.patcher.patch.OptionsContainer
 import app.revanced.patcher.patch.Patch
 import kotlin.reflect.KClass
+import kotlin.reflect.full.companionObjectInstance
 
 /**
  * Recursively find a given annotation on a class.
@@ -41,8 +40,24 @@ object PatchExtensions {
     val Class<out Patch<Data>>.version get() = recursiveAnnotation(Version::class)?.version
     val Class<out Patch<Data>>.include get() = recursiveAnnotation(app.revanced.patcher.patch.annotations.Patch::class)!!.include
     val Class<out Patch<Data>>.description get() = recursiveAnnotation(Description::class)?.description
-    val Class<out Patch<Data>>.dependencies get() = recursiveAnnotation(app.revanced.patcher.patch.annotations.Dependencies::class)?.dependencies
+    val Class<out Patch<Data>>.dependencies get() = recursiveAnnotation(app.revanced.patcher.patch.annotations.DependsOn::class)?.dependencies
     val Class<out Patch<Data>>.compatiblePackages get() = recursiveAnnotation(Compatibility::class)?.compatiblePackages
+    val Class<out Patch<Data>>.options
+        get() = kotlin.companionObjectInstance?.let {
+            (it as? OptionsContainer)?.options
+        }
+    val Class<out Patch<Data>>.deprecated: Pair<String, KClass<out Patch<Data>>?>?
+        get() = recursiveAnnotation(PatchDeprecated::class)?.let {
+            it.reason to it.replacement.let { cl ->
+                if (cl == Patch::class) null else cl
+            }
+        }
+
+    @JvmStatic
+    fun Class<out Patch<Data>>.dependsOn(patch: Class<out Patch<Data>>): Boolean {
+        if (this.patchName == patch.patchName) throw IllegalArgumentException("thisval and patch may not be the same")
+        return this.dependencies?.any { it.java.patchName == this@dependsOn.patchName } == true
+    }
 }
 
 object MethodFingerprintExtensions {

src/main/kotlin/app/revanced/patcher/fingerprint/method/impl/MethodFingerprint.kt

@@ -22,10 +22,10 @@ import org.jf.dexlib2.iface.Method
  * A `null` opcode is equals to an unknown opcode.
  */
 abstract class MethodFingerprint(
-    internal val returnType: String?,
+    internal val returnType: String? = null,
-    internal val access: Int?,
+    internal val access: Int? = null,
-    internal val parameters: Iterable<String>?,
+    internal val parameters: Iterable<String>? = null,
-    internal val opcodes: Iterable<Opcode?>?,
+    internal val opcodes: Iterable<Opcode?>? = null,
     internal val strings: Iterable<String>? = null,
     internal val customFingerprint: ((methodDef: Method) -> Boolean)? = null
 ) : Fingerprint {

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

@@ -3,16 +3,32 @@ package app.revanced.patcher.patch
 import app.revanced.patcher.data.Data
 import app.revanced.patcher.patch.impl.BytecodePatch
 import app.revanced.patcher.patch.impl.ResourcePatch
-
+import java.io.Closeable
 
 /**
  * A ReVanced patch.
+ *
  * Can either be a [ResourcePatch] or a [BytecodePatch].
+ * If it implements [Closeable], it will be closed after all patches have been executed.
+ * Closing will be done in reverse execution order.
  */
 abstract class Patch<out T : Data> {
-
     /**
      * The main function of the [Patch] which the patcher will call.
      */
     abstract fun execute(data: @UnsafeVariance T): PatchResult
+}
+
+abstract class OptionsContainer {
+    /**
+     * A list of [PatchOption]s.
+     * @see PatchOptions
+     */
+    @Suppress("MemberVisibilityCanBePrivate")
+    val options = PatchOptions()
+
+    protected fun option(opt: PatchOption<*>): PatchOption<*> {
+        options.register(opt)
+        return opt
+    }
 }

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

@@ -0,0 +1,230 @@
+@file:Suppress("CanBeParameter", "MemberVisibilityCanBePrivate", "UNCHECKED_CAST")
+
+package app.revanced.patcher.patch
+
+import java.io.File
+import java.nio.file.Path
+import kotlin.reflect.KProperty
+
+class NoSuchOptionException(val option: String) : Exception("No such option: $option")
+class IllegalValueException(val value: Any?) : Exception("Illegal value: $value")
+class InvalidTypeException(val got: String, val expected: String) :
+    Exception("Invalid option value type: $got, expected $expected")
+
+object RequirementNotMetException : Exception("null was passed into an option that requires a value")
+
+/**
+ * A registry for an array of [PatchOption]s.
+ * @param options An array of [PatchOption]s.
+ */
+class PatchOptions(vararg val options: PatchOption<*>) : Iterable<PatchOption<*>> {
+    private val register = mutableMapOf<String, PatchOption<*>>()
+
+    init {
+        options.forEach { register(it) }
+    }
+
+    internal fun register(option: PatchOption<*>) {
+        if (register.containsKey(option.key)) {
+            throw IllegalStateException("Multiple options found with the same key")
+        }
+        register[option.key] = option
+    }
+
+    /**
+     * Get a [PatchOption] by its key.
+     * @param key The key of the [PatchOption].
+     */
+    operator fun get(key: String) = register[key] ?: throw NoSuchOptionException(key)
+
+    /**
+     * Set the value of a [PatchOption].
+     * @param key The key of the [PatchOption].
+     * @param value The value you want it to be.
+     * Please note that using the wrong value type results in a runtime error.
+     */
+    inline operator fun <reified T> set(key: String, value: T) {
+        @Suppress("UNCHECKED_CAST") val opt = get(key) as PatchOption<T>
+        if (opt.value !is T) throw InvalidTypeException(
+            T::class.java.canonicalName,
+            opt.value?.let { it::class.java.canonicalName } ?: "null"
+        )
+        opt.value = value
+    }
+
+    /**
+     * Sets the value of a [PatchOption] to `null`.
+     * @param key The key of the [PatchOption].
+     */
+    fun nullify(key: String) {
+        get(key).value = null
+    }
+
+    override fun iterator() = options.iterator()
+}
+
+/**
+ * A [Patch] option.
+ * @param key Unique identifier of the option. Example: _`settings.microg.enabled`_
+ * @param default The default value of the option.
+ * @param title A human-readable title of the option. Example: _MicroG Settings_
+ * @param description A human-readable description of the option. Example: _Settings integration for MicroG._
+ * @param required Whether the option is required.
+ */
+@Suppress("MemberVisibilityCanBePrivate")
+sealed class PatchOption<T>(
+    val key: String,
+    default: T?,
+    val title: String,
+    val description: String,
+    val required: Boolean,
+    val validator: (T?) -> Boolean
+) {
+    var value: T? = default
+        set(value) {
+            if (value == null && required) {
+                throw RequirementNotMetException
+            }
+            if (!validator(value)) {
+                throw IllegalValueException(value)
+            }
+            field = value
+        }
+
+    /**
+     * Gets the value of the option.
+     * Please note that using the wrong value type results in a runtime error.
+     */
+    operator fun <T> getValue(thisRef: Any?, property: KProperty<*>) = value as T
+
+    /**
+     * Gets the value of the option.
+     * Please note that using the wrong value type results in a runtime error.
+     */
+    inline operator fun <reified V> setValue(thisRef: Any?, property: KProperty<*>, new: V) {
+        if (value !is V) throw InvalidTypeException(
+            V::class.java.canonicalName,
+            value?.let { it::class.java.canonicalName } ?: "null"
+        )
+        value = new as T
+    }
+
+    /**
+     * A [PatchOption] representing a [String].
+     * @see PatchOption
+     */
+    class StringOption(
+        key: String,
+        default: String?,
+        title: String,
+        description: String,
+        required: Boolean = false,
+        validator: (String?) -> Boolean = { true }
+    ) : PatchOption<String>(
+        key, default, title, description, required, validator
+    )
+
+    /**
+     * A [PatchOption] representing a [Boolean].
+     * @see PatchOption
+     */
+    class BooleanOption(
+        key: String,
+        default: Boolean?,
+        title: String,
+        description: String,
+        required: Boolean = false,
+        validator: (Boolean?) -> Boolean = { true }
+    ) : PatchOption<Boolean>(
+        key, default, title, description, required, validator
+    )
+
+    /**
+     * A [PatchOption] with a list of allowed options.
+     * @param options A list of allowed options for the [ListOption].
+     * @see PatchOption
+     */
+    sealed class ListOption<E>(
+        key: String,
+        default: E?,
+        val options: Iterable<E>,
+        title: String,
+        description: String,
+        required: Boolean = false,
+        validator: (E?) -> Boolean = { true }
+    ) : PatchOption<E>(
+        key, default, title, description, required, {
+            (it?.let { it in options } ?: true) && validator(it)
+        }
+    ) {
+        init {
+            if (default !in options) {
+                throw IllegalStateException("Default option must be an allowed option")
+            }
+        }
+    }
+
+    /**
+     * A [ListOption] of type [String].
+     * @see ListOption
+     */
+    class StringListOption(
+        key: String,
+        default: String?,
+        options: Iterable<String>,
+        title: String,
+        description: String,
+        required: Boolean = false,
+        validator: (String?) -> Boolean = { true }
+    ) : ListOption<String>(
+        key, default, options, title, description, required, validator
+    )
+
+    /**
+     * A [ListOption] of type [Int].
+     * @see ListOption
+     */
+    class IntListOption(
+        key: String,
+        default: Int?,
+        options: Iterable<Int>,
+        title: String,
+        description: String,
+        required: Boolean = false,
+        validator: (Int?) -> Boolean = { true }
+    ) : ListOption<Int>(
+        key, default, options, title, description, required, validator
+    )
+
+    /**
+     * A [PatchOption] representing a [Path].
+     * @see PatchOption
+     */
+    open class PathOption(
+        key: String,
+        default: Path?,
+        title: String,
+        description: String,
+        required: Boolean = false,
+        validator: (Path?) -> Boolean = { true }
+    ) : PatchOption<Path>(
+        key, default, title, description, required, validator
+    )
+
+    /**
+     * A [PathOption] of type [File].
+     * @see PathOption
+     */
+    class FileOption(
+        key: String,
+        default: File?,
+        title: String,
+        description: String,
+        required: Boolean = false,
+        validator: (File?) -> Boolean = { true }
+    ) : PathOption(
+        key, default?.toPath(), title, description, required, {
+            validator(it?.toFile())
+        }
+    )
+}

src/main/kotlin/app/revanced/patcher/patch/annotations/PatchAnnotation.kt

@@ -19,6 +19,6 @@ annotation class Patch(val include: Boolean = true)
 @Target(AnnotationTarget.CLASS)
 @Retention(AnnotationRetention.RUNTIME)
 @MustBeDocumented
-annotation class Dependencies(
+annotation class DependsOn(
     val dependencies: Array<KClass<out Patch<Data>>> = []
 )

src/main/kotlin/app/revanced/patcher/util/dex/DexFile.kt

@@ -5,6 +5,6 @@ import java.io.InputStream
 /**
  * Wrapper for dex files.
  * @param name The original name of the dex file.
- * @param dexFileInputStream The dex file as [InputStream].
+ * @param stream The dex file as [InputStream].
  */
-data class DexFile(val name: String, val dexFileInputStream: InputStream)
+data class DexFile(val name: String, val stream: InputStream)

src/main/kotlin/app/revanced/patcher/util/patch/PatchBundle.kt

@@ -1,17 +1,17 @@
-package app.revanced.patcher.util.patch.base
+package app.revanced.patcher.util.patch
 
 import app.revanced.patcher.data.Data
 import app.revanced.patcher.patch.Patch
 import java.io.File
 
 /**
- * @param patchBundlePath The path to the patch bundle.
+ * @param path The path to the patch bundle.
  */
-abstract class PatchBundle(patchBundlePath: String) : File(patchBundlePath) {
+abstract class PatchBundle(path: String) : File(path) {
     internal fun loadPatches(classLoader: ClassLoader, classNames: Iterator<String>) = buildList {
-        classNames.forEach { className ->
+        for (className in classNames) {
             val clazz = classLoader.loadClass(className)
-            if (!clazz.isAnnotationPresent(app.revanced.patcher.patch.annotations.Patch::class.java)) return@forEach
+            if (!clazz.isAnnotationPresent(app.revanced.patcher.patch.annotations.Patch::class.java)) continue
             @Suppress("UNCHECKED_CAST") this.add(clazz as Class<out Patch<Data>>)
         }
     }

src/main/kotlin/app/revanced/patcher/util/patch/StringIterator.kt

@@ -1,4 +1,4 @@
-package app.revanced.patcher.util.patch.util
+package app.revanced.patcher.util.patch
 
 internal class StringIterator<T, I : Iterator<T>>(
     private val iterator: I,

src/main/kotlin/app/revanced/patcher/util/patch/impl/DexPatchBundle.kt

@@ -1,7 +1,7 @@
-package app.revanced.patcher.util.patch.implementation
+package app.revanced.patcher.util.patch.impl
 
-import app.revanced.patcher.util.patch.base.PatchBundle
+import app.revanced.patcher.util.patch.PatchBundle
-import app.revanced.patcher.util.patch.util.StringIterator
+import app.revanced.patcher.util.patch.StringIterator
 import org.jf.dexlib2.DexFileFactory
 
 /**

src/main/kotlin/app/revanced/patcher/util/patch/impl/JarPatchBundle.kt

@@ -1,7 +1,7 @@
-package app.revanced.patcher.util.patch.implementation
+package app.revanced.patcher.util.patch.impl
 
-import app.revanced.patcher.util.patch.base.PatchBundle
+import app.revanced.patcher.util.patch.PatchBundle
-import app.revanced.patcher.util.patch.util.StringIterator
+import app.revanced.patcher.util.patch.StringIterator
 import java.net.URLClassLoader
 import java.util.jar.JarFile
 

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

@@ -0,0 +1,93 @@
+package app.revanced.patcher.patch
+
+import app.revanced.patcher.usage.bytecode.ExampleBytecodePatch
+import org.junit.jupiter.api.Test
+import org.junit.jupiter.api.assertThrows
+import java.io.File
+import kotlin.test.assertNotEquals
+
+internal class PatchOptionsTest {
+    private val options = ExampleBytecodePatch.options
+
+    @Test
+    fun `should not throw an exception`() {
+        for (option in options) {
+            when (option) {
+                is PatchOption.StringOption -> {
+                    option.value = "Hello World"
+                }
+
+                is PatchOption.BooleanOption -> {
+                    option.value = false
+                }
+
+                is PatchOption.StringListOption -> {
+                    option.value = option.options.first()
+                    for (choice in option.options) {
+                        println(choice)
+                    }
+                }
+
+                is PatchOption.IntListOption -> {
+                    option.value = option.options.first()
+                    for (choice in option.options) {
+                        println(choice)
+                    }
+                }
+
+                is PatchOption.PathOption -> {
+                    option.value = File("test.txt").toPath()
+                }
+            }
+        }
+        val option = options["key1"]
+        println(option.value)
+        options["key1"] = "Hello, world!"
+        println(option.value)
+    }
+
+    @Test
+    fun `should return a different value when changed`() {
+        var value: String by options["key1"]
+        val current = value + "" // force a copy
+        value = "Hello, world!"
+        assertNotEquals(current, value)
+    }
+
+    @Test
+    fun `should be able to set value to null`() {
+        // Sadly, doing:
+        // > options["key2"] = null
+        // is not possible because Kotlin
+        // cannot reify the type "Nothing?".
+        options.nullify("key2")
+    }
+
+    @Test
+    fun `should fail because the option does not exist`() {
+        assertThrows<NoSuchOptionException> {
+            options["this option does not exist"] = 123
+        }
+    }
+
+    @Test
+    fun `should fail because of invalid value type`() {
+        assertThrows<InvalidTypeException> {
+            options["key1"] = 123
+        }
+    }
+
+    @Test
+    fun `should fail because of an illegal value`() {
+        assertThrows<IllegalValueException> {
+            options["key3"] = "this value is not an allowed option"
+        }
+    }
+
+    @Test
+    fun `should fail because of the requirement is not met`() {
+        assertThrows<RequirementNotMetException> {
+            options.nullify("key1")
+        }
+    }
+}

src/test/kotlin/app/revanced/patcher/usage/bytecode/ExampleBytecodeCompatibility.kt

@@ -1,4 +1,4 @@
-package app.revanced.patcher.usage.bytecode.annotation
+package app.revanced.patcher.usage.bytecode
 
 import app.revanced.patcher.annotation.Compatibility
 import app.revanced.patcher.annotation.Package

src/test/kotlin/app/revanced/patcher/usage/bytecode/ExampleBytecodePatch.kt

@@ -1,4 +1,4 @@
-package app.revanced.patcher.usage.bytecode.patch
+package app.revanced.patcher.usage.bytecode
 
 import app.revanced.patcher.annotation.Description
 import app.revanced.patcher.annotation.Name
@@ -7,11 +7,13 @@ import app.revanced.patcher.data.impl.BytecodeData
 import app.revanced.patcher.extensions.addInstructions
 import app.revanced.patcher.extensions.or
 import app.revanced.patcher.extensions.replaceInstruction
+import app.revanced.patcher.patch.OptionsContainer
+import app.revanced.patcher.patch.PatchOption
 import app.revanced.patcher.patch.PatchResult
 import app.revanced.patcher.patch.PatchResultSuccess
+import app.revanced.patcher.patch.annotations.DependsOn
 import app.revanced.patcher.patch.annotations.Patch
 import app.revanced.patcher.patch.impl.BytecodePatch
-import app.revanced.patcher.usage.bytecode.fingerprints.ExampleFingerprint
 import app.revanced.patcher.usage.resource.annotation.ExampleResourceCompatibility
 import app.revanced.patcher.util.proxy.mutableTypes.MutableField.Companion.toMutable
 import app.revanced.patcher.util.proxy.mutableTypes.MutableMethod.Companion.toMutable
@@ -30,12 +32,15 @@ import org.jf.dexlib2.immutable.reference.ImmutableFieldReference
 import org.jf.dexlib2.immutable.reference.ImmutableStringReference
 import org.jf.dexlib2.immutable.value.ImmutableFieldEncodedValue
 import org.jf.dexlib2.util.Preconditions
+import java.io.File
+import java.nio.file.Path
 
 @Patch
 @Name("example-bytecode-patch")
 @Description("Example demonstration of a bytecode patch.")
 @ExampleResourceCompatibility
 @Version("0.0.1")
+@DependsOn([ExampleBytecodePatch::class])
 class ExampleBytecodePatch : BytecodePatch(listOf(ExampleFingerprint)) {
     // This function will be executed by the patcher.
     // You can treat it as a constructor
@@ -43,6 +48,10 @@ class ExampleBytecodePatch : BytecodePatch(listOf(ExampleFingerprint)) {
         // Get the resolved method by its fingerprint from the resolver cache
         val result = ExampleFingerprint.result!!
 
+        // Patch options
+        println(key1)
+        key2 = false
+
         // Get the implementation for the resolved method
         val method = result.mutableMethod
         val implementation = method.implementation!!
@@ -160,4 +169,32 @@ class ExampleBytecodePatch : BytecodePatch(listOf(ExampleFingerprint)) {
             )
         )
     }
+
+    companion object : OptionsContainer() {
+        private var key1: String by option(
+            PatchOption.StringOption(
+                "key1", "default", "title", "description", true
+            )
+        )
+        private var key2: Boolean by option(
+            PatchOption.BooleanOption(
+                "key2", true, "title", "description" // required defaults to false
+            )
+        )
+        private var key3: List<String> by option(
+            PatchOption.StringListOption(
+                "key3", "TEST", listOf("TEST", "TEST1", "TEST2"), "title", "description"
+            )
+        )
+        private var key4: List<Int> by option(
+            PatchOption.IntListOption(
+                "key4", 1, listOf(1, 2, 3), "title", "description"
+            )
+        )
+        private var key5: Path by option(
+            PatchOption.PathOption(
+                "key5", File("test.txt").toPath(), "title", "description"
+            )
+        )
+    }
 }

src/test/kotlin/app/revanced/patcher/usage/bytecode/ExampleFingerprint.kt

@@ -1,4 +1,4 @@
-package app.revanced.patcher.usage.bytecode.fingerprints
+package app.revanced.patcher.usage.bytecode
 
 import app.revanced.patcher.annotation.Name
 import app.revanced.patcher.annotation.Version
@@ -6,7 +6,7 @@ import app.revanced.patcher.extensions.or
 import app.revanced.patcher.fingerprint.method.annotation.FuzzyPatternScanMethod
 import app.revanced.patcher.fingerprint.method.annotation.MatchingMethod
 import app.revanced.patcher.fingerprint.method.impl.MethodFingerprint
-import app.revanced.patcher.usage.bytecode.annotation.ExampleBytecodeCompatibility
+import app.revanced.patcher.usage.bytecode.ExampleBytecodeCompatibility
 import org.jf.dexlib2.AccessFlags
 import org.jf.dexlib2.Opcode