feat(app): add init_boot detection to bail on incorrect boot images

app/src/main/java/org/akuatech/ksupatcher/viewmodel/MainViewModel.kt

@@ -301,6 +301,7 @@ class MainViewModel(
         val workDir = getWorkDir()
         val boot = _state.value.patchState.bootImagePath
         val kmi = _state.value.patchState.kmi
+        val bootName = _state.value.patchState.bootImageName
 
         if (boot.isNullOrBlank()) {
             _state.update {
@@ -310,7 +311,25 @@ class MainViewModel(
         }
 
         viewModelScope.launch {
-            _state.update { it.copy(patchState = it.patchState.copy(isPatching = true, status = "Downloading binaries...")) }
+            _state.update { it.copy(patchState = it.patchState.copy(isPatching = true, status = "Checking device requirements...")) }
+
+            if (bootName != null && bootName.contains("boot", ignoreCase = true) && !bootName.contains("init", ignoreCase = true)) {
+                if (hasInitBoot()) {
+                    val msg = "Bail out: This device uses an init_boot partition. Patching a regular boot image will cause ksud to incorrectly create a ramdisk. Please patch init_boot.img instead."
+                    publishStreamingLog(msg, updatePatch = true)
+                    _state.update {
+                        it.copy(
+                            patchState = it.patchState.copy(
+                                isPatching = false,
+                                status = "Requires init_boot.img"
+                            )
+                        )
+                    }
+                    return@launch
+                }
+            }
+
+            _state.update { it.copy(patchState = it.patchState.copy(status = "Downloading binaries...")) }
             val prepare = ensureBinaries()
             if (prepare.isFailure) {
                 _state.update {
@@ -1010,6 +1029,29 @@ class MainViewModel(
         }
     }
 
+    private suspend fun hasInitBoot(): Boolean {
+        return withContext(Dispatchers.IO) {
+            try {
+                val getpropProc = ProcessBuilder("getprop").start()
+                val props = getpropProc.inputStream.bufferedReader().use { it.readText() }
+                if (props.contains("init_boot", ignoreCase = true)) { // ro.boot.init_boot_device or ro.boot.init_boot_cmdline
+                    return@withContext true
+                }
+
+                val release = android.system.Os.uname().release
+                val versionParts = release.substringBefore("-").split(".")
+                val major = versionParts.getOrNull(0)?.toIntOrNull() ?: 0
+                val minor = versionParts.getOrNull(1)?.toIntOrNull() ?: 0
+                if (major > 5 || (major == 5 && minor >= 15)) {
+                    return@withContext true // >= 5.15 kernels have init_boot
+                }
+            } catch (e: Throwable) {
+                // Ignore
+            }
+            false
+        }
+    }
+
     private companion object {
         val httpClient = okhttp3.OkHttpClient()
         const val MAX_LOG_CHARS = 64_000