feat: Add patches, utils

Author: Aunali321

local.properties

@@ -0,0 +1 @@
+sdk.dir = /home/aun/Android/Sdk

patches/api/patches.api

@@ -11,3 +11,13 @@ patches {
         license = "GNU General Public License v3.0"
     }
 }
+
+dependencies {
+    compileOnly(project(":patches:stub"))
+}
+
+kotlin {
+    compilerOptions {
+        freeCompilerArgs = listOf("-Xcontext-receivers")
+    }
+}

patches/build.gradle.kts

@@ -0,0 +1,60 @@
+package app.revanced.patches.all.misc.packagename
+
+import app.revanced.patcher.patch.Option
+import app.revanced.patcher.patch.resourcePatch
+import app.revanced.patcher.patch.stringOption
+import org.w3c.dom.Element
+
+lateinit var packageNameOption: Option<String>
+
+/**
+ * Set the package name to use.
+ * If this is called multiple times, the first call will set the package name.
+ *
+ * @param fallbackPackageName The package name to use if the user has not already specified a package name.
+ * @return The package name that was set.
+ * @throws OptionException.ValueValidationException If the package name is invalid.
+ */
+fun setOrGetFallbackPackageName(fallbackPackageName: String): String {
+    val packageName = packageNameOption.value!!
+
+    return if (packageName == packageNameOption.default) {
+        fallbackPackageName.also { packageNameOption.value = it }
+    } else {
+        packageName
+    }
+}
+
+val changePackageNamePatch = resourcePatch(
+    name = "Change package name",
+    description = "Appends \".revanced\" to the package name by default. Changing the package name of the app can lead to unexpected issues.",
+    use = false,
+) {
+    packageNameOption = stringOption(
+        key = "packageName",
+        default = "Default",
+        values = mapOf("Default" to "Default"),
+        title = "Package name",
+        description = "The name of the package to rename the app to.",
+        required = true,
+    ) {
+        it == "Default" || it!!.matches(Regex("^[a-z]\\w*(\\.[a-z]\\w*)+\$"))
+    }
+
+    finalize {
+        document("AndroidManifest.xml").use { document ->
+
+            val replacementPackageName = packageNameOption.value
+
+            val manifest = document.getElementsByTagName("manifest").item(0) as Element
+            manifest.setAttribute(
+                "package",
+                if (replacementPackageName != packageNameOption.default) {
+                    replacementPackageName
+                } else {
+                    "${manifest.getAttribute("package")}.revanced"
+                },
+            )
+        }
+    }
+}