feat: Add CLI

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

@@ -0,0 +1,27 @@
+package app.revanced.cli
+
+import app.revanced.cli.utils.SignatureParser
+import app.revanced.patcher.Patcher
+import app.revanced.patches.Index.patches
+import java.io.File
+
+fun main(args: Array<String>) {
+    val patcher = Patcher(
+        File(args[0]), // in.apk
+        File(args[1]), // out path
+        SignatureParser.parse(args[2]).toTypedArray() // signatures.json
+    )
+
+    // load all patches
+    for (patch in patches) {
+        patcher.addPatches(patch())
+    }
+
+    // apply all patches
+    patcher.applyPatches().forEach{ (name, result) ->
+        println("$name: $result")
+    }
+
+    // save patched apk
+    patcher.save()
+}

src/main/kotlin/app/revanced/cli/utils/SignatureParser.kt

@@ -0,0 +1,43 @@
+package app.revanced.cli.utils
+import com.google.gson.JsonParser
+import java.io.File
+import app.revanced.patcher.signature.MethodSignature
+import org.jf.dexlib2.AccessFlags
+import org.jf.dexlib2.Opcodes
+
+class SignatureParser {
+    companion object {
+        fun parse(signatureJsonPath: String): List<MethodSignature> {
+            val json = File(signatureJsonPath).readText()
+            val signatures = JsonParser.parseString(json).asJsonObject.get("signatures").asJsonArray.map { sig ->
+                val signature = sig.asJsonObject
+
+                val returnType = signature.get("returns").asString
+
+                var accessFlags = 0
+
+                signature
+                    .get("accessors").asJsonArray
+                    .forEach { accessFlags = accessFlags or AccessFlags.getAccessFlag(it.asString).value }
+
+                val parameters = signature.get("parameters").asJsonArray
+                    .map { it.asString }
+                    .toTypedArray()
+
+                val opcodes = signature.get("opcodes").asJsonArray
+                    .map { Opcodes.getDefault().getOpcodeByName(it.asString)!! }
+                    .toTypedArray()
+
+                MethodSignature(
+                    signature.get("name").asString,
+                    returnType,
+                    accessFlags,
+                    parameters,
+                    opcodes
+                )
+            }
+
+            return signatures
+        }
+    }
+}