feat: use separate command to patch

src/main/kotlin/app/revanced/cli/aligning/Aligning.kt

@@ -1,37 +0,0 @@
-package app.revanced.cli.aligning
-
-import app.revanced.cli.command.MainCommand.logger
-import app.revanced.patcher.PatcherResult
-import app.revanced.utils.signing.align.ZipAligner
-import app.revanced.utils.signing.align.zip.ZipFile
-import app.revanced.utils.signing.align.zip.structures.ZipEntry
-import java.io.File
-
-object Aligning {
-    fun align(result: PatcherResult, inputFile: File, outputFile: File) {
-        logger.info("Aligning ${inputFile.name} to ${outputFile.name}")
-
-        if (outputFile.exists()) outputFile.delete()
-
-        ZipFile(outputFile).use { file ->
-            result.dexFiles.forEach {
-                file.addEntryCompressData(
-                    ZipEntry.createWithName(it.name),
-                    it.stream.readBytes()
-                )
-            }
-
-            result.resourceFile?.let {
-                file.copyEntriesFromFileAligned(
-                    ZipFile(it),
-                    ZipAligner::getEntryAlignment
-                )
-            }
-
-            file.copyEntriesFromFileAligned(
-                ZipFile(inputFile),
-                ZipAligner::getEntryAlignment
-            )
-        }
-    }
-}

src/main/kotlin/app/revanced/cli/command/Main.kt

@@ -0,0 +1,39 @@
+package app.revanced.cli.command
+
+import app.revanced.cli.logging.impl.DefaultCliLogger
+import app.revanced.patcher.patch.PatchClass
+import picocli.CommandLine
+import picocli.CommandLine.Command
+import picocli.CommandLine.IVersionProvider
+import java.util.*
+
+fun main(args: Array<String>) {
+    CommandLine(Main).execute(*args)
+}
+
+internal typealias PatchList = List<PatchClass>
+
+internal val logger = DefaultCliLogger()
+
+object CLIVersionProvider : IVersionProvider {
+    override fun getVersion(): Array<String> {
+        Properties().apply {
+            load(Main::class.java.getResourceAsStream("/app/revanced/cli/version.properties"))
+        }.let {
+            return arrayOf("ReVanced CLI v${it.getProperty("version")}")
+        }
+    }
+}
+
+@Command(
+    name = "revanced-cli",
+    description = ["Command line application to use ReVanced"],
+    mixinStandardHelpOptions = true,
+    versionProvider = CLIVersionProvider::class,
+    subcommands = [
+        ListPatchesCommand::class,
+        PatchCommand::class,
+        UninstallCommand::class
+    ]
+)
+internal object Main

src/main/kotlin/app/revanced/cli/command/PatchCommand.kt

@@ -0,0 +1,412 @@
+package app.revanced.cli.command
+
+import app.revanced.cli.patcher.logging.impl.PatcherLogger
+import app.revanced.patcher.PatchBundleLoader
+import app.revanced.patcher.Patcher
+import app.revanced.patcher.PatcherOptions
+import app.revanced.patcher.PatcherResult
+import app.revanced.patcher.extensions.PatchExtensions.compatiblePackages
+import app.revanced.patcher.extensions.PatchExtensions.include
+import app.revanced.patcher.extensions.PatchExtensions.patchName
+import app.revanced.utils.Options
+import app.revanced.utils.Options.setOptions
+import app.revanced.utils.adb.AdbManager
+import app.revanced.utils.align.ZipAligner
+import app.revanced.utils.align.zip.ZipFile
+import app.revanced.utils.align.zip.structures.ZipEntry
+import app.revanced.utils.signing.ApkSigner
+import app.revanced.utils.signing.SigningOptions
+import kotlinx.coroutines.runBlocking
+import picocli.CommandLine
+import picocli.CommandLine.Help.Visibility.ALWAYS
+import java.io.File
+
+
+@CommandLine.Command(
+    name = "patch",
+    description = ["Patch the supplied APK file with the supplied patches and integrations"]
+)
+internal object PatchCommand: Runnable {
+    @CommandLine.Parameters(
+        description = ["APK file to be patched"],
+        arity = "1..1"
+    )
+    lateinit var apk: File
+
+    @CommandLine.Option(
+        names = ["-b", "--bundle"],
+        description = ["One or more bundles of patches"],
+        required = true
+    )
+    var patchBundles = emptyList<File>()
+
+    @CommandLine.Option(
+        names = ["-m", "--merge"],
+        description = ["One or more DEX files or containers to merge into the APK"]
+    )
+    var integrations = listOf<File>()
+
+    @CommandLine.Option(
+        names = ["-i", "--include"],
+        description = ["List of patches to include"]
+    )
+    var includedPatches = arrayOf<String>()
+
+    @CommandLine.Option(
+        names = ["-e", "--exclude"],
+        description = ["List of patches to exclude"]
+    )
+    var excludedPatches = arrayOf<String>()
+
+    @CommandLine.Option(
+        names = ["--options"],
+        description = ["Path to patch options JSON file"],
+        showDefaultValue = ALWAYS
+    )
+    var optionsFile: File = File("options.json")
+
+    @CommandLine.Option(
+        names = ["--exclusive"],
+        description = ["Only include patches that are explicitly specified to be included"],
+        showDefaultValue = ALWAYS
+    )
+    var exclusive = false
+
+    @CommandLine.Option(
+        names = ["--experimental"],
+        description = ["Ignore patches incompatibility to versions"],
+        showDefaultValue = ALWAYS
+    )
+    var experimental: Boolean = false
+
+    @CommandLine.Option(
+        names = ["-o", "--out"],
+        description = ["Path to save the patched APK file to"],
+        required = true
+    )
+    lateinit var outputFilePath: File
+
+    @CommandLine.Option(
+        names = ["-d", "--device-serial"],
+        description = ["ADB device serial to install to"],
+        showDefaultValue = ALWAYS
+    )
+    var deviceSerial: String? = null
+
+    @CommandLine.Option(
+        names = ["--mount"],
+        description = ["Install by mounting the patched package"],
+        showDefaultValue = ALWAYS
+    )
+    var mount: Boolean = false
+
+    @CommandLine.Option(
+        names = ["--common-name"],
+        description = ["The common name of the signer of the patched APK file"],
+        showDefaultValue = ALWAYS
+
+    )
+    var commonName = "ReVanced"
+
+    @CommandLine.Option(
+        names = ["--keystore"],
+        description = ["Path to the keystore to sign the patched APK file with"]
+    )
+    var keystorePath: String? = null
+
+    @CommandLine.Option(
+        names = ["--password"],
+        description = ["The password of the keystore to sign the patched APK file with"]
+    )
+    var password = "ReVanced"
+
+    @CommandLine.Option(
+        names = ["-r", "--resource-cache"],
+        description = ["Path to temporary resource cache directory"],
+        showDefaultValue = ALWAYS
+    )
+    var resourceCachePath = File("revanced-resource-cache")
+
+    @CommandLine.Option(
+        names = ["--custom-aapt2-binary"],
+        description = ["Path to a custom AAPT binary to compile resources with"]
+    )
+    var aaptBinaryPath = File("")
+
+    @CommandLine.Option(
+        names = ["-p", "--purge"],
+        description = ["Purge the temporary resource cache directory after patching"],
+        showDefaultValue = ALWAYS
+    )
+    var purge: Boolean = false
+
+    override fun run() {
+        // region Prepare
+
+        if (!apk.exists()) {
+            logger.error("Input file ${apk.name} does not exist")
+            return
+        }
+
+        val adbManager = deviceSerial?.let { serial ->
+            if (mount) AdbManager.RootAdbManager(serial, logger) else AdbManager.UserAdbManager(
+                serial,
+                logger
+            )
+        }
+
+        // endregion
+
+        // region Load patches
+
+        logger.info("Loading patches")
+
+        val patches = PatchBundleLoader.Jar(*patchBundles.toTypedArray())
+        val integrations = integrations
+
+        logger.info("Setting up patch options")
+
+        optionsFile.let {
+            if (it.exists()) patches.setOptions(it, logger)
+            else Options.serialize(patches, prettyPrint = true).let(it::writeText)
+        }
+
+        // endregion
+
+        // region Patch
+
+        val patcher = Patcher(
+            PatcherOptions(
+                apk,
+                resourceCachePath,
+                aaptBinaryPath.absolutePath,
+                resourceCachePath.absolutePath,
+                PatcherLogger
+            )
+        )
+
+        val result = patcher.apply {
+            acceptIntegrations(integrations)
+            acceptPatches(filterPatchSelection(patches))
+
+            // Execute patches.
+            runBlocking {
+                apply(false).collect { patchResult ->
+                    patchResult.exception?.let {
+                        logger.error("${patchResult.patchName} failed:\n${patchResult.exception}")
+                    } ?: logger.info("${patchResult.patchName} succeeded")
+                }
+            }
+        }.get()
+
+        patcher.close()
+
+        // endregion
+
+        // region Finish
+
+        val alignAndSignedFile = sign(
+            apk.newAlignedFile(
+                result,
+                resourceCachePath.resolve("${outputFilePath.nameWithoutExtension}_aligned.apk")
+            )
+        )
+
+        logger.info("Copying to ${outputFilePath.name}")
+        alignAndSignedFile.copyTo(outputFilePath, overwrite = true)
+
+        adbManager?.install(AdbManager.Apk(outputFilePath, patcher.context.packageMetadata.packageName))
+
+        if (purge) {
+            logger.info("Purging temporary files")
+            outputFilePath.delete()
+            purge(resourceCachePath)
+        }
+
+        // endregion
+    }
+
+
+    /**
+     * Filter the patches to be added to the patcher. The filter is based on the following:
+     * - [includedPatches] (explicitly included)
+     * - [excludedPatches] (explicitly excluded)
+     * - [exclusive] (only include patches that are explicitly included)
+     * - [experimental] (ignore patches incompatibility to versions)
+     * - package name and version of the input APK file (if [experimental] is false)
+     *
+     * @param patches The patches to filter.
+     * @return The filtered patches.
+     */
+    private fun Patcher.filterPatchSelection(patches: PatchList) = buildList {
+        val packageName = context.packageMetadata.packageName
+        val packageVersion = context.packageMetadata.packageVersion
+
+        patches.forEach patch@{ patch ->
+            val formattedPatchName = patch.patchName.lowercase().replace(" ", "-")
+
+            /**
+             * Check if the patch is explicitly excluded.
+             *
+             * Cases:
+             *  1. -e patch.name
+             *  2. -i patch.name -e patch.name
+             */
+
+            /**
+             * Check if the patch is explicitly excluded.
+             *
+             * Cases:
+             *  1. -e patch.name
+             *  2. -i patch.name -e patch.name
+             */
+
+            val excluded = excludedPatches.contains(formattedPatchName)
+            if (excluded) return@patch logger.info("Excluding ${patch.patchName}")
+
+            /**
+             * Check if the patch is constrained to packages.
+             */
+
+            /**
+             * Check if the patch is constrained to packages.
+             */
+
+            patch.compatiblePackages?.let { packages ->
+                packages.singleOrNull { it.name == packageName }?.let { `package` ->
+                    /**
+                     * Check if the package version matches.
+                     * If experimental is true, version matching will be skipped.
+                     */
+
+                    /**
+                     * Check if the package version matches.
+                     * If experimental is true, version matching will be skipped.
+                     */
+
+                    val matchesVersion = experimental || `package`.versions.let {
+                        it.isEmpty() || it.any { version -> version == packageVersion }
+                    }
+
+                    if (!matchesVersion) return@patch logger.warn(
+                        "${patch.patchName} is incompatible with version $packageVersion. " +
+                                "This patch is only compatible with version " +
+                                packages.joinToString(";") { `package` ->
+                                    "${`package`.name}: ${`package`.versions.joinToString(", ")}"
+                                }
+                    )
+
+                } ?: return@patch logger.trace(
+                    "${patch.patchName} is incompatible with $packageName. " +
+                            "This patch is only compatible with " +
+                            packages.joinToString(", ") { `package` -> `package`.name }
+                )
+
+                return@let
+            } ?: logger.trace("$formattedPatchName: No constraint on packages.")
+
+            /**
+             * Check if the patch is explicitly included.
+             *
+             * Cases:
+             *  1. --exclusive
+             *  2. --exclusive -i patch.name
+             */
+
+            /**
+             * Check if the patch is explicitly included.
+             *
+             * Cases:
+             *  1. --exclusive
+             *  2. --exclusive -i patch.name
+             */
+
+            val explicitlyIncluded = includedPatches.contains(formattedPatchName)
+
+            val implicitlyIncluded = !exclusive && patch.include // Case 3.
+            val exclusivelyIncluded = exclusive && explicitlyIncluded // Case 2.
+
+            val included = implicitlyIncluded || exclusivelyIncluded
+            if (!included) return@patch logger.info("${patch.patchName} excluded by default") // Case 1.
+
+            logger.trace("Adding $formattedPatchName")
+
+            add(patch)
+        }
+    }
+
+    /**
+     * Create a new aligned APK file.
+     *
+     * @param result The result of the patching process.
+     * @param outputFile The file to save the aligned APK to.
+     */
+    private fun File.newAlignedFile(
+        result: PatcherResult,
+        outputFile: File
+    ): File {
+        logger.info("Aligning $name to ${outputFile.name}")
+
+        if (outputFile.exists()) outputFile.delete()
+
+        ZipFile(outputFile).use { file ->
+            result.dexFiles.forEach {
+                file.addEntryCompressData(
+                    ZipEntry.createWithName(it.name),
+                    it.stream.readBytes()
+                )
+            }
+
+            result.resourceFile?.let {
+                file.copyEntriesFromFileAligned(
+                    ZipFile(it),
+                    ZipAligner::getEntryAlignment
+                )
+            }
+
+            // TODO: Do not compress result.doNotCompress
+
+            file.copyEntriesFromFileAligned(
+                ZipFile(this),
+                ZipAligner::getEntryAlignment
+            )
+        }
+
+        return outputFile
+    }
+
+    /**
+     * Sign the APK file.
+     *
+     * @param inputFile The APK file to sign.
+     * @return The signed APK file. If [mount] is true, the input file will be returned.
+     */
+    private fun sign(inputFile: File) = if (mount)
+        inputFile
+    else {
+        logger.info("Signing ${inputFile.name}")
+
+        val keyStoreFilePath = keystorePath ?: outputFilePath
+            .absoluteFile.parentFile.resolve("${outputFilePath.nameWithoutExtension}.keystore").canonicalPath
+
+        val options = SigningOptions(
+            commonName,
+            password,
+            keyStoreFilePath
+        )
+
+        ApkSigner(options)
+            .signApk(
+                inputFile,
+                resourceCachePath.resolve("${outputFilePath.nameWithoutExtension}_signed.apk")
+            )
+    }
+
+    private fun purge(resourceCachePath: File) {
+        val result = if (resourceCachePath.deleteRecursively())
+            "Purged resource cache directory"
+        else
+            "Failed to purge resource cache directory"
+        logger.info(result)
+    }
+}

src/main/kotlin/app/revanced/utils/align/ZipAligner.kt

@@ -1,6 +1,6 @@
-package app.revanced.utils.signing.align
+package app.revanced.utils.align
 
-import app.revanced.utils.signing.align.zip.structures.ZipEntry
+import app.revanced.utils.align.zip.structures.ZipEntry
 
 internal object ZipAligner {
     private const val DEFAULT_ALIGNMENT = 4

src/main/kotlin/app/revanced/utils/align/zip/Extensions.kt

@@ -1,4 +1,4 @@
-package app.revanced.utils.signing.align.zip
+package app.revanced.utils.align.zip
 
 import java.io.DataInput
 import java.io.DataOutput

src/main/kotlin/app/revanced/utils/align/zip/ZipFile.kt

@@ -1,7 +1,7 @@
-package app.revanced.utils.signing.align.zip
+package app.revanced.utils.align.zip
 
-import app.revanced.utils.signing.align.zip.structures.ZipEndRecord
-import app.revanced.utils.signing.align.zip.structures.ZipEntry
+import app.revanced.utils.align.zip.structures.ZipEndRecord
+import app.revanced.utils.align.zip.structures.ZipEntry
 import java.io.Closeable
 import java.io.File
 import java.io.RandomAccessFile
@@ -11,15 +11,15 @@ import java.util.zip.CRC32
 import java.util.zip.Deflater
 
 class ZipFile(file: File) : Closeable {
-    var entries: MutableList<ZipEntry> = mutableListOf()
+    private var entries: MutableList<ZipEntry> = mutableListOf()
 
     private val filePointer: RandomAccessFile = RandomAccessFile(file, "rw")
-    private var CDNeedsRewrite = false
+    private var centralDirectoryNeedsRewrite = false
 
     private val compressionLevel = 5
 
     init {
-        //if file isn't empty try to load entries
+        // If file isn't empty try to load entries.
         if (file.length() > 0) {
             val endRecord = findEndRecord()
 
@@ -29,17 +29,17 @@ class ZipFile(file: File) : Closeable {
             entries = readEntries(endRecord).toMutableList()
         }
 
-        //seek back to start for writing
+        // Seek back to start for writing.
         filePointer.seek(0)
     }
 
     private fun findEndRecord(): ZipEndRecord {
-        //look from end to start since end record is at the end
+        // Look from end to start since end record is at the end.
         for (i in filePointer.length() - 1 downTo 0) {
             filePointer.seek(i)
-            //possible beginning of signature
+            // Possible beginning of signature.
             if (filePointer.readByte() == 0x50.toByte()) {
-                //seek back to get the full int
+                // Seek back to get the full int.
                 filePointer.seek(i)
                 val possibleSignature = filePointer.readUIntLE()
                 if (possibleSignature == ZipEndRecord.ECD_SIGNATURE) {
@@ -76,7 +76,7 @@ class ZipFile(file: File) : Closeable {
     }
 
     private fun writeCD() {
-        val CDStart = filePointer.channel.position().toUInt()
+        val centralDirectoryStartOffset = filePointer.channel.position().toUInt()
 
         entries.forEach {
             filePointer.channel.write(it.toCDE())
@@ -89,8 +89,8 @@ class ZipFile(file: File) : Closeable {
             0u,
             entriesCount,
             entriesCount,
-            filePointer.channel.position().toUInt() - CDStart,
-            CDStart,
+            filePointer.channel.position().toUInt() - centralDirectoryStartOffset,
+            centralDirectoryStartOffset,
             ""
         )
 
@@ -98,7 +98,7 @@ class ZipFile(file: File) : Closeable {
     }
 
     private fun addEntry(entry: ZipEntry, data: ByteBuffer) {
-        CDNeedsRewrite = true
+        centralDirectoryNeedsRewrite = true
 
         entry.localHeaderOffset = filePointer.channel.position().toUInt()
 
@@ -114,8 +114,7 @@ class ZipFile(file: File) : Closeable {
         compressor.finish()
 
         val uncompressedSize = data.size
-        val compressedData =
-            ByteArray(uncompressedSize) //i'm guessing compression won't make the data bigger
+        val compressedData = ByteArray(uncompressedSize) // I'm guessing compression won't make the data bigger.
 
         val compressedDataLength = compressor.deflate(compressedData)
         val compressedBuffer =
@@ -126,7 +125,7 @@ class ZipFile(file: File) : Closeable {
         val crc = CRC32()
         crc.update(data)
 
-        entry.compression = 8u //deflate compression
+        entry.compression = 8u // Deflate compression.
         entry.uncompressedSize = uncompressedSize.toUInt()
         entry.compressedSize = compressedDataLength.toUInt()
         entry.crc32 = crc.value.toUInt()
@@ -136,14 +135,14 @@ class ZipFile(file: File) : Closeable {
 
     private fun addEntryCopyData(entry: ZipEntry, data: ByteBuffer, alignment: Int? = null) {
         alignment?.let {
-            //calculate where data would end up
+            // Calculate where data would end up.
             val dataOffset = filePointer.filePointer + entry.LFHSize
 
             val mod = dataOffset % alignment
 
-            //wrong alignment
+            // Wrong alignment.
             if (mod != 0L) {
-                //add padding at end of extra field
+                // Add padding at end of extra field.
                 entry.localExtraField =
                     entry.localExtraField.copyOf((entry.localExtraField.size + (alignment - mod)).toInt())
             }
@@ -152,7 +151,7 @@ class ZipFile(file: File) : Closeable {
         addEntry(entry, data)
     }
 
-    fun getDataForEntry(entry: ZipEntry): ByteBuffer {
+    private fun getDataForEntry(entry: ZipEntry): ByteBuffer {
         return filePointer.channel.map(
             FileChannel.MapMode.READ_ONLY,
             entry.dataOffset.toLong(),
@@ -160,9 +159,15 @@ class ZipFile(file: File) : Closeable {
         )
     }
 
+    /**
+     * Copies all entries from [file] to this file but skip already existing entries.
+     *
+     * @param file The file to copy entries from.
+     * @param entryAlignment A function that returns the alignment for a given entry.
+     */
     fun copyEntriesFromFileAligned(file: ZipFile, entryAlignment: (entry: ZipEntry) -> Int?) {
         for (entry in file.entries) {
-            if (entries.any { it.fileName == entry.fileName }) continue //don't add duplicates
+            if (entries.any { it.fileName == entry.fileName }) continue // Skip duplicates
 
             val data = file.getDataForEntry(entry)
             addEntryCopyData(entry, data, entryAlignment(entry))
@@ -170,7 +175,7 @@ class ZipFile(file: File) : Closeable {
     }
 
     override fun close() {
-        if (CDNeedsRewrite) writeCD()
+        if (centralDirectoryNeedsRewrite) writeCD()
         filePointer.close()
     }
 }

src/main/kotlin/app/revanced/utils/align/zip/structures/ZipEndRecord.kt

@@ -1,9 +1,9 @@
-package app.revanced.utils.signing.align.zip.structures
+package app.revanced.utils.align.zip.structures
 
-import app.revanced.utils.signing.align.zip.putUInt
-import app.revanced.utils.signing.align.zip.putUShort
-import app.revanced.utils.signing.align.zip.readUIntLE
-import app.revanced.utils.signing.align.zip.readUShortLE
+import app.revanced.utils.align.zip.putUInt
+import app.revanced.utils.align.zip.putUShort
+import app.revanced.utils.align.zip.readUIntLE
+import app.revanced.utils.align.zip.readUShortLE
 import java.io.DataInput
 import java.nio.ByteBuffer
 import java.nio.ByteOrder

src/main/kotlin/app/revanced/utils/align/zip/structures/ZipEntry.kt

@@ -1,6 +1,6 @@
-package app.revanced.utils.signing.align.zip.structures
+package app.revanced.utils.align.zip.structures
 
-import app.revanced.utils.signing.align.zip.*
+import app.revanced.utils.align.zip.*
 import java.io.DataInput
 import java.nio.ByteBuffer
 import java.nio.ByteOrder

src/main/kotlin/app/revanced/utils/signing/ApkSigner.kt

@@ -1,7 +1,6 @@
 package app.revanced.utils.signing
 
-import app.revanced.cli.command.MainCommand.logger
-import app.revanced.cli.signing.SigningOptions
+import app.revanced.cli.command.logger
 import com.android.apksig.ApkSigner
 import org.bouncycastle.asn1.x500.X500Name
 import org.bouncycastle.asn1.x509.SubjectPublicKeyInfo
@@ -18,10 +17,40 @@ import java.security.*
 import java.security.cert.X509Certificate
 import java.util.*
 
-internal class Signer(
+internal class ApkSigner(
     private val signingOptions: SigningOptions
 ) {
+    private val signer: ApkSigner.Builder
     private val passwordCharArray = signingOptions.password.toCharArray()
+
+    init {
+        Security.addProvider(BouncyCastleProvider())
+
+        val keyStore = KeyStore.getInstance("BKS", "BC")
+        val alias = keyStore.let { store ->
+            FileInputStream(File(signingOptions.keyStoreFilePath).also {
+                if (!it.exists()) {
+                    logger.info("Creating keystore at ${it.absolutePath}")
+                    newKeystore(it)
+                } else {
+                    logger.info("Using keystore at ${it.absolutePath}")
+                }
+            }).use { fis -> store.load(fis, null) }
+            store.aliases().nextElement()
+        }
+
+        with(
+            ApkSigner.SignerConfig.Builder(
+                signingOptions.cn,
+                keyStore.getKey(alias, passwordCharArray) as PrivateKey,
+                listOf(keyStore.getCertificate(alias) as X509Certificate)
+            ).build()
+        ) {
+            this@ApkSigner.signer = ApkSigner.Builder(listOf(this))
+            signer.setCreatedBy(signingOptions.cn)
+        }
+    }
+
     private fun newKeystore(out: File) {
         val (publicKey, privateKey) = createKey()
         val privateKS = KeyStore.getInstance("BKS", "BC")
@@ -50,30 +79,12 @@ internal class Signer(
         return JcaX509CertificateConverter().getCertificate(builder.build(signer)) to pair.private
     }
 
-    fun signApk(input: File, output: File) {
-        Security.addProvider(BouncyCastleProvider())
-
-        // TODO: keystore should be saved securely
-        val ks = File(signingOptions.keyStoreFilePath)
-        if (!ks.exists()) newKeystore(ks) else {
-            logger.info("Found existing keystore: ${ks.name}")
-        }
-
-        val keyStore = KeyStore.getInstance("BKS", "BC")
-        FileInputStream(ks).use { fis -> keyStore.load(fis, null) }
-        val alias = keyStore.aliases().nextElement()
-
-        val config = ApkSigner.SignerConfig.Builder(
-            signingOptions.cn,
-            keyStore.getKey(alias, passwordCharArray) as PrivateKey,
-            listOf(keyStore.getCertificate(alias) as X509Certificate)
-        ).build()
-
-        val signer = ApkSigner.Builder(listOf(config))
-        signer.setCreatedBy(signingOptions.cn)
+    fun signApk(input: File, output: File): File {
         signer.setInputApk(input)
         signer.setOutputApk(output)
 
         signer.build().sign()
+
+        return output
     }
 }

src/main/kotlin/app/revanced/utils/signing/SigningOptions.kt

@@ -0,0 +1,7 @@
+package app.revanced.utils.signing
+
+data class SigningOptions(
+    val cn: String,
+    val password: String,
+    val keyStoreFilePath: String
+)