el apk sidecar para sync de ballbox encola cuando tocas sync now y despues espero mas de 15min y no hace nada. no podemos hacerlo en el momento cuando tocamos sync now?


**Considering architecture sync options**

I need to think about how to approach this question about architecture. I might ask if the user wants to investigate further. It seems I should use the memory database if it's useful. My response needs to be direct, and I could say that conceptually, yes, we can trigger an immediate foreground sync, with a queue as a fallback. The user's question suggests they're looking for a technical answer, so I need to keep it concise.

Sí. Se puede.

`Sync now` no debería quedar como “encolar y rezar”.
Debería hacer una de estas dos:

1. disparar sync inmediato en foreground
2. mostrar estado real si algo bloquea

Si hoy encola y 15+ min no pasa nada, hay problema de diseño o de implementación.

Lo correcto para ese botón:

- tocar `Sync now`
- arrancar job inmediato
- mantener wake / foreground service si hace falta
- mostrar progreso / error
- dejar WorkManager o cola solo como retry/fallback

Si depende solo de background scheduling, Android puede demorarlo mucho por:
- battery optimizations
- doze
- restricciones de red
- quotas del scheduler

Entonces sí: para acción explícita del usuario, conviene sync directo, no “eventually”.

Si querés, lo reviso y te digo:
- por qué hoy queda encolado
- qué cambio exacto hacer
- riesgo de batería / ANR / duplicados
- cómo dejar `Sync now = sync real` y cola solo de backup


**Clarifying repo inspection**

I need to think about inspecting the repo! First, I should ask which specific repo or path to look at. It’s likely it’s ballbox, but I’m not totally sure. There’s also the intent to lock that might be enough — should I investigate and change something? The user's response of "1" could hint at a choice, but we didn’t present any options. I definitely need to clarify that further!

No cierra.

Tu `1` apunta a qué:

- `1` = revisalo y cambiá el botón para sync inmediato
- otra cosa

Pasame eso y sigo.


si, deja nuevo apk con link a el


**Inspecting the project**

I need to inspect the project and clarify the objectives to make sure everything is clear. Maybe I should use a to-do list to outline the tasks. I also need to find the repository. It’s likely that the skill I need is somewhere in the ballbox-company, perhaps in my memory. So, I should start searching through the files to locate what I need. Let's see what I can uncover!

todo

Investigate Ballbox sidecar Sync now delay and build APK with immediate sync behavior

Find Ballbox sidecar Android project, inspect current Sync now flow, change it to trigger immediate sync on user action instead of only queued background work, validate behavior, build APK, and provide downloadable link.


Created #1: Investigate Ballbox sidecar Sync now delay and build APK with immediate sync behavior (pending)


Updated #1 (pending → in_progress)


bash

pwd && ls -la && find /home/sebas/work -maxdepth 3 -iname '*ballbox*' -o -iname '*sidecar*' 2>/dev/null | head -200

find /home/sebas -maxdepth 4 \( -iname '*ballbox*' -o -iname '*sidecar*' \) 2>/dev/null | head -300


/home/sebas
total 296
drwxr-xr-x+ 40 sebas sebas  4096 Jun  9 14:11 .
drwxr-xr-x   4 root  root   4096 Jan 27 22:05 ..
drwxr-xr-x   5 sebas sebas  4096 Apr 21 23:44 .agents
drwxrwxr-x  11 sebas sebas  4096 Apr 22 16:57 agents-database
-rw-rw-r--   1 sebas sebas   113 May  7 18:11 AGENTS.md
drwx------   3 sebas sebas  4096 Jan 16 17:38 .ansible
drwxr-xr-x   3 sebas sebas  4096 May  7 18:58 archive
-rw-rw-r--   1 sebas sebas     0 Apr 19 17:55 .bash_aliases
-rw-------   1 sebas sebas 10696 Jun  9 14:11 .bash_history
-rw-r--r--   1 sebas sebas   220 Dec  4  2025 .bash_logout
-rw-r--r--   1 sebas sebas  5461 May  8 09:51 .bashrc
-rw-r--r--   1 sebas sebas  5357 Apr 20 10:56 .bashrc.bak.20260420105624
drwxr-xr-x   4 sebas sebas  4096 May  1 01:52 .bun
drwxr-xr-x  10 sebas sebas  4096 Jun  8 14:53 .cache
drwxr-xr-x  11 sebas sebas  4096 Jun  6 18:49 .claude
-rw-------   1 sebas sebas  5120 Jun  6 18:49 .claude.json
-rw-------   1 sebas sebas  5120 Jun  6 18:49 .claude.json.backup
-rw-r--r--   1 sebas sebas   403 Jan 28 11:38 client_secret_1019422495774-0cvo8lefqh667vgmekec8ruqdnrior71.apps.googleusercontent.com.json
-rw-rw-r--   1 sebas sebas     0 Dec  4  2025 .cloud-locale-test.skip
drwxr-xr-x   9 sebas sebas  4096 Jun  4 10:18 .codex
drwx------  24 sebas sebas  4096 Jun  9 11:55 .config
drwxrwxr-x   2 sebas sebas  4096 Dec  4  2025 Desktop
drwxr-xr-x   2 sebas sebas  4096 Dec  4  2025 Documents
drwxrwxr-x   3 sebas sebas  4096 Apr 18 09:35 downloads
drwxr-xr-x   2 sebas sebas  4096 Apr 23 16:37 Downloads
drwxrwxr-x   3 sebas sebas  4096 May 30 20:14 dropbox
-rw-rw-r--   1 sebas sebas   306 Jun  9 09:23 .gitconfig
-rw-------   1 sebas sebas    73 Apr 15 18:12 .git-credentials
drwxrwxr-x   3 sebas sebas  4096 May  1 01:52 go
drwxr-xr-x   4 sebas sebas  4096 Apr 23 22:53 .hist
drwx------   5 sebas sebas  4096 Apr 14 12:54 .local
drwxr-xr-x   6 sebas sebas  4096 May  7 18:40 media
drwx------   5 sebas sebas  4096 May  5 12:15 .mozilla
drwxr-xr-x   3 sebas sebas  4096 Apr 11 12:38 Music
drwxr-xr-x   3 sebas sebas  4096 May  7 18:42 notes
drwxr-xr-x   5 sebas sebas  4096 Feb  1 21:56 .npm
drwxr-xr-x   4 sebas sebas  4096 Jan 27 11:48 .npm-global
-rw-------   1 sebas sebas    31 Jan 27 11:47 .npmrc
-rw-r--r--   1 sebas sebas     0 Mar 18 15:06 .opencode-web.log
-rw-rw-r--   1 sebas sebas   472 Apr 14 23:17 opencode-web.log
drwxr-xr-x   3 sebas sebas  4096 May  7 14:14 .orca-remote
drwxr-xr-x  14 sebas sebas  4096 Jun  8 14:21 outputs
drwxrwxr-x   5 sebas sebas  4096 May  1 16:06 .pi
drwxrwxr-x  14 sebas sebas  4096 Jun  9 16:57 pi-config
drwxr-xr-x   2 sebas sebas  4096 Dec  4  2025 Pictures
drwx------   3 sebas sebas  4096 Jan 17 11:24 .pki
drwxr-xr-x   6 sebas sebas  4096 May  8 09:50 playwright-browsers
drwxrwxr-x   3 sebas sebas  4096 Apr 19 15:41 .pnpm-store
-rw-r--r--   1 sebas sebas   884 May  5 12:33 .profile
drwxr-xr-x   2 sebas sebas  4096 Dec  4  2025 Public
drwxr-xr-x  17 sebas sebas  4096 Jun  9 10:14 runtime
drwx------   2 sebas sebas  4096 Apr 29 17:39 .ssh
-rw-r--r--   1 sebas sebas     0 Dec  4  2025 .sudo_as_admin_successful
drwxr-xr-x   2 sebas sebas  4096 Dec  4  2025 Templates
-rw-rw-r--   1 sebas sebas  1274 Apr 21 18:39 .tmux.conf
drwxr-xr-x   2 sebas sebas  4096 Dec  4  2025 Videos
-rw-rw-r--   1 sebas sebas     0 Jun  2 20:34 w3@P]@8
-rw-r--r--   1 sebas sebas   215 Apr 21 16:30 .wget-hsts
drwxr-xr-x  11 sebas sebas  4096 Jun  9 09:22 work
-rw-------   1 sebas sebas    58 Jun  8 09:50 .Xauthority
-rw-------   1 sebas sebas  4107 Jun  9 09:53 .xsession-errors
-rw-------   1 sebas sebas 35391 Jun  7 10:07 .xsession-errors.old
drwxr-xr-x   2 sebas sebas  4096 Apr 30 14:25 .zed_server
/home/sebas/work/tasks/T-bbx-print-20260520/ballbox-logo-black-clean.png
/home/sebas/work/tasks/T-bbx-print-20260520/make_ballbox_print_pdf_black_bg.py
/home/sebas/work/tasks/T-bbx-print-20260520/ballbox-plot-a3-horizontal-black.png
/home/sebas/work/tasks/T-bbx-print-20260520/ballbox-plot-a3-horizontal-black.pdf
/home/sebas/work/tasks/T-bbx-print-20260520/ballbox-logo-green-clean.png
/home/sebas/work/tasks/T-bbx-print-20260520/ballbox-plot-a3-horizontal-black-bg-color-logo.png
/home/sebas/work/tasks/T-bbx-print-20260520/ballbox-plot-a3-horizontal-black-bg-color-logo.pdf
/home/sebas/work/tasks/T-bbx-print-20260520/ballbox-logo-clean.png
/home/sebas/work/tasks/T-bbx-print-20260520/make_ballbox_print_pdf_v2.py
/home/sebas/work/tasks/T-bbx-print-20260520/ballbox-plot-a3-horizontal.pdf
/home/sebas/work/tasks/T-bbx-print-20260520/make_ballbox_print_pdf.py
/home/sebas/work/tasks/T-bbx-print-20260520/ballbox-plot-a3-horizontal-clean-green.pdf
/home/sebas/work/tasks/T-bbx-print-20260520/ballbox-plot-a3-horizontal-clean-green.png
/home/sebas/work/tasks/T-002-machine-ads-sync-build/ballbox-machine-ads-sync-v0.1.6.apk
/home/sebas/work/tasks/T-002-machine-ads-sync-build/ballbox-machine-ads-sync-v0.1.5.apk
/home/sebas/work/tasks/T-ballbox-rebrand-v3
/home/sebas/work/tasks/T-ballbox-rebrand-v3/ballbox-v3-debug.keystore
/home/sebas/work/tasks/T-001-tcn-apk/TCN-SD-05-BallBox-QR-AR-v5205 (1).apk
/home/sebas/work/tasks/T-004/sidecar-portability-plan.md
/home/sebas/work/tasks/T-ballbox-ftp-field-instructions
/home/sebas/work/tasks/T-ballbox-ftp-field-instructions/BALLBOX-FTP-RECOVERY-INSTRUCTIONS.txt
/home/sebas/work/admin/scripts/ballbox-services.sh
/home/sebas/work/projects/ballbox
/home/sebas/work/projects/ballbox-machine-ads-sync
/home/sebas/work/reports/ballbox-machine-package-remote-ads-2026-06-06.md


cd /home/sebas/work/projects/ballbox-machine-ads-sync && find . -maxdepth 3 \( -name '*.kt' -o -name '*.java' -o -name '*.xml' -o -name 'build.gradle*' -o -name 'AndroidManifest.xml' \) | sed 's#^./##' | sort | head -300

cd /home/sebas/work/projects/ballbox-machine-ads-sync && rg -n "Sync now|sync now|WorkManager|enqueue|OneTimeWorkRequest|Foreground|startForeground|sync" app src . 2>/dev/null | head -300


app/build.gradle.kts
build.gradle.kts


app/build.gradle.kts:7:    namespace = "app.ballbox.machineadssync"
app/build.gradle.kts:11:        applicationId = "app.ballbox.machineadssync"
./README.md:3:Standalone Android sidecar repo for Ballbox machine ad/media sync.
./README.md:7:- manual `Sync now` button
app/src/main/java/app/ballbox/machineadssync/MainActivity.kt:1:package app.ballbox.machineadssync
app/src/main/java/app/ballbox/machineadssync/MainActivity.kt:10:import app.ballbox.machineadssync.databinding.ActivityMainBinding
app/src/main/java/app/ballbox/machineadssync/MainActivity.kt:28:        binding.syncButton.setOnClickListener {
app/src/main/java/app/ballbox/machineadssync/MainActivity.kt:58:            appendLog("Storage permission granted. Tap Sync now again.")
app/src/main/java/app/ballbox/machineadssync/MainActivity.kt:66:        binding.syncButton.isEnabled = false
app/src/main/java/app/ballbox/machineadssync/MainActivity.kt:68:        binding.logText.text = "Starting sync..."
app/src/main/java/app/ballbox/machineadssync/MainActivity.kt:72:                MachineAdsSyncEngine().sync(
app/src/main/java/app/ballbox/machineadssync/MainActivity.kt:80:                binding.syncButton.isEnabled = true
app/src/main/res/layout/activity_main.xml:16:            android:text="Ballbox machine ads sync"
app/src/main/res/layout/activity_main.xml:24:            android:text="MVP sidecar. Manual sync first. No emulator required." />
app/src/main/res/layout/activity_main.xml:49:                android:id="@+id/syncButton"
app/src/main/res/layout/activity_main.xml:53:                android:text="Sync now" />
./settings.gradle.kts:17:rootProject.name = "machine-ads-sync"
./app/src/main/java/app/ballbox/machineadssync/MainActivity.kt:1:package app.ballbox.machineadssync
./app/src/main/java/app/ballbox/machineadssync/MainActivity.kt:10:import app.ballbox.machineadssync.databinding.ActivityMainBinding
./app/src/main/java/app/ballbox/machineadssync/MainActivity.kt:28:        binding.syncButton.setOnClickListener {
./app/src/main/java/app/ballbox/machineadssync/MainActivity.kt:58:            appendLog("Storage permission granted. Tap Sync now again.")
./app/src/main/java/app/ballbox/machineadssync/MainActivity.kt:66:        binding.syncButton.isEnabled = false
./app/src/main/java/app/ballbox/machineadssync/MainActivity.kt:68:        binding.logText.text = "Starting sync..."
./app/src/main/java/app/ballbox/machineadssync/MainActivity.kt:72:                MachineAdsSyncEngine().sync(
./app/src/main/java/app/ballbox/machineadssync/MainActivity.kt:80:                binding.syncButton.isEnabled = true
./app/src/main/java/app/ballbox/machineadssync/MachineAdsSyncEngine.kt:1:package app.ballbox.machineadssync
./app/src/main/java/app/ballbox/machineadssync/MachineAdsSyncEngine.kt:13:    fun sync(manifestUrl: String, targetRoot: String, logger: (String) -> Unit): SyncResult {
app/src/main/java/app/ballbox/machineadssync/MachineAdsSyncEngine.kt:1:package app.ballbox.machineadssync
app/src/main/java/app/ballbox/machineadssync/MachineAdsSyncEngine.kt:13:    fun sync(manifestUrl: String, targetRoot: String, logger: (String) -> Unit): SyncResult {
./app/src/main/res/layout/activity_main.xml:16:            android:text="Ballbox machine ads sync"
./app/src/main/res/layout/activity_main.xml:24:            android:text="MVP sidecar. Manual sync first. No emulator required." />
./app/src/main/res/layout/activity_main.xml:49:                android:id="@+id/syncButton"
./app/src/main/res/layout/activity_main.xml:53:                android:text="Sync now" />
./app/build.gradle.kts:7:    namespace = "app.ballbox.machineadssync"
./app/build.gradle.kts:11:        applicationId = "app.ballbox.machineadssync"


**Investigating sync issues**

I find it interesting that the current repository has a direct sync button. I wonder if there’s an issue with the installed APK being different or if there’s a bug related to the main thread. It seems like I need to inspect this further to see what's causing the hiccup. This could lead to a better understanding of the sync issues at hand! All right, let's get into it.


package app.ballbox.machineadssync

import android.Manifest
import android.content.pm.PackageManager
import android.os.Build
import android.os.Bundle
import androidx.appcompat.app.AppCompatActivity
import androidx.core.app.ActivityCompat
import androidx.core.content.ContextCompat
import app.ballbox.machineadssync.databinding.ActivityMainBinding

class MainActivity : AppCompatActivity() {
    private lateinit var binding: ActivityMainBinding

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        binding = ActivityMainBinding.inflate(layoutInflater)
        setContentView(binding.root)

        binding.manifestUrlInput.setText(DEFAULT_MANIFEST_URL)
        binding.targetRootInput.setText(DEFAULT_TARGET_ROOT)
        binding.logText.text = "Ready"

        binding.backButton.setOnClickListener {
            finish()
        }

        binding.syncButton.setOnClickListener {
            val manifestUrl = binding.manifestUrlInput.text?.toString()?.trim().orEmpty()
            val targetRoot = binding.targetRootInput.text?.toString()?.trim().orEmpty()

            if (manifestUrl.isEmpty() || targetRoot.isEmpty()) {
                binding.statusText.text = "Manifest URL and target root are required"
                return@setOnClickListener
            }

            if (!hasStoragePermission()) {
                binding.statusText.text = "Storage permission required"
                appendLog("Requesting storage permission...")
                ActivityCompat.requestPermissions(this, STORAGE_PERMISSIONS, REQUEST_STORAGE_PERMISSIONS)
                return@setOnClickListener
            }

            startSync(manifestUrl, targetRoot)
        }
    }

    override fun onRequestPermissionsResult(
        requestCode: Int,
        permissions: Array<out String>,
        grantResults: IntArray,
    ) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults)
        if (requestCode != REQUEST_STORAGE_PERMISSIONS) return

        if (hasStoragePermission()) {
            binding.statusText.text = "Permission granted"
            appendLog("Storage permission granted. Tap Sync now again.")
        } else {
            binding.statusText.text = "Storage permission denied"
            appendLog("Storage permission denied.")
        }
    }

    private fun startSync(manifestUrl: String, targetRoot: String) {
        binding.syncButton.isEnabled = false
        binding.statusText.text = "Syncing..."
        binding.logText.text = "Starting sync..."

        Thread {
            val result = runCatching {
                MachineAdsSyncEngine().sync(
                    manifestUrl = manifestUrl,
                    targetRoot = targetRoot,
                    logger = { line -> runOnUiThread { appendLog(line) } }
                )
            }

            runOnUiThread {
                binding.syncButton.isEnabled = true
                result.onSuccess {
                    binding.statusText.text = "Sync OK · restart policy ${it.restartPolicy}"
                    appendLog("Done. Applied ${it.appliedCount} changed files. Pruned ${it.prunedCount} stale files.")
                }.onFailure {
                    binding.statusText.text = "Sync failed"
                    appendLog("ERROR ${it.javaClass.simpleName}: ${it.message}")
                }
            }
        }.start()
    }

    private fun hasStoragePermission(): Boolean {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) return true
        return STORAGE_PERMISSIONS.all { permission ->
            ContextCompat.checkSelfPermission(this, permission) == PackageManager.PERMISSION_GRANTED
        }
    }

    private fun appendLog(line: String) {
        val previous = binding.logText.text?.toString().orEmpty()
        binding.logText.text = if (previous.isBlank()) line else "$previous\n$line"
    }

    companion object {
        private const val REQUEST_STORAGE_PERMISSIONS = 1001
        private val STORAGE_PERMISSIONS = arrayOf(
            Manifest.permission.READ_EXTERNAL_STORAGE,
            Manifest.permission.WRITE_EXTERNAL_STORAGE,
        )
        private const val DEFAULT_MANIFEST_URL = "https://ballbox.app/api/machines/2601070188/ads-manifest"
        private const val DEFAULT_TARGET_ROOT = "/sdcard/TcnFolder"
    }
}


package app.ballbox.machineadssync

import org.json.JSONObject
import java.io.ByteArrayOutputStream
import java.io.File
import java.io.FileInputStream
import java.io.FileOutputStream
import java.net.HttpURLConnection
import java.net.URL
import java.security.MessageDigest

class MachineAdsSyncEngine {
    fun sync(manifestUrl: String, targetRoot: String, logger: (String) -> Unit): SyncResult {
        logger("TARGET ROOT $targetRoot")
        logger("GET $manifestUrl")
        val manifestPayload = fetchJson(manifestUrl)
        if (!manifestPayload.optBoolean("ok")) {
            throw IllegalStateException(manifestPayload.optString("message", "manifest request failed"))
        }

        val manifest = manifestPayload.getJSONObject("manifest")
        val restartPolicy = manifest.optString("restartPolicy", "app")
        val files = manifest.getJSONArray("files")
        val managedTargets = mutableSetOf<String>()
        var appliedCount = 0

        for (index in 0 until files.length()) {
            val file = files.getJSONObject(index)
            val target = file.getString("target")
            managedTargets += normalizeRelativePath(target)
            val url = file.getString("url")
            val expectedSha = file.getString("sha256")
            val outputFile = File(targetRoot, target)
            logger("TARGET $target")
            logger("DEST ${outputFile.absolutePath}")

            val parentDir = outputFile.parentFile
            if (parentDir != null && !parentDir.exists()) {
                logger("MKDIR ${parentDir.absolutePath}")
                if (!parentDir.mkdirs() && !parentDir.exists()) {
                    throw IllegalStateException("mkdir failed for ${parentDir.absolutePath}")
                }
            }

            if (outputFile.exists()) {
                val existingSha = sha256(outputFile)
                if (existingSha == expectedSha) {
                    logger("SKIP $target already current")
                    continue
                }
            }

            logger("DOWNLOAD $url")
            val bytes = fetchBytes(url, logger)
            val downloadedSha = sha256(bytes)
            logger("SHA expected=$expectedSha")
            logger("SHA actual=$downloadedSha")
            if (downloadedSha != expectedSha) {
                throw IllegalStateException("sha mismatch for $target")
            }

            val tempFile = File(outputFile.absolutePath + ".tmp")
            logger("WRITE TMP ${tempFile.absolutePath}")
            FileOutputStream(tempFile).use { it.write(bytes) }
            if (outputFile.exists()) {
                logger("DELETE OLD ${outputFile.absolutePath}")
                if (!outputFile.delete()) {
                    throw IllegalStateException("delete failed for ${outputFile.absolutePath}")
                }
            }
            logger("RENAME TMP -> DEST")
            if (!tempFile.renameTo(outputFile)) {
                throw IllegalStateException("rename failed from ${tempFile.absolutePath} to ${outputFile.absolutePath}")
            }
            appliedCount += 1
            logger("WROTE $target (${bytes.size} bytes)")
        }

        val prunedCount = pruneManagedDirectories(targetRoot, managedTargets, logger)
        return SyncResult(restartPolicy = restartPolicy, appliedCount = appliedCount, prunedCount = prunedCount)
    }

    private fun fetchJson(url: String): JSONObject {
        val text = fetchText(url)
        return JSONObject(text)
    }

    private fun fetchText(url: String): String {
        val connection = openConnection(url)
        return connection.inputStream.bufferedReader().use { it.readText() }
    }

    private fun fetchBytes(url: String, logger: (String) -> Unit): ByteArray {
        val connection = openConnection(url)
        val contentLength = connection.contentLengthLong
        if (contentLength > 0) {
            logger("CONTENT LENGTH $contentLength bytes")
        }
        return connection.inputStream.use { input ->
            val output = ByteArrayOutputStream()
            val buffer = ByteArray(DEFAULT_BUFFER_SIZE)
            var totalRead = 0L
            var nextLogAt = 1L * 1024 * 1024
            while (true) {
                val count = input.read(buffer)
                if (count <= 0) break
                output.write(buffer, 0, count)
                totalRead += count
                if (totalRead >= nextLogAt) {
                    if (contentLength > 0) {
                        val percent = (totalRead * 100 / contentLength).coerceAtMost(100)
                        logger("DOWNLOAD PROGRESS $totalRead/$contentLength bytes (${percent}%)")
                    } else {
                        logger("DOWNLOAD PROGRESS $totalRead bytes")
                    }
                    nextLogAt += 1L * 1024 * 1024
                }
            }
            logger("DOWNLOAD COMPLETE $totalRead bytes")
            output.toByteArray()
        }
    }

    private fun openConnection(url: String): HttpURLConnection {
        val connection = URL(url).openConnection() as HttpURLConnection
        connection.requestMethod = "GET"
        connection.connectTimeout = 15_000
        connection.readTimeout = 60_000
        connection.setRequestProperty("User-Agent", "BallboxMachineAdsSync/0.1")
        val status = connection.responseCode
        if (status !in 200..299) {
            throw IllegalStateException("request failed: $status for $url")
        }
        return connection
    }

    private fun pruneManagedDirectories(targetRoot: String, managedTargets: Set<String>, logger: (String) -> Unit): Int {
        val managedDirs = managedTargets
            .mapNotNull { target -> target.substringBeforeLast('/', missingDelimiterValue = "").takeIf { it.isNotBlank() } }
            .toSortedSet()

        var prunedCount = 0

        for (dir in managedDirs) {
            val dirFile = File(targetRoot, dir)
            if (!dirFile.exists() || !dirFile.isDirectory) {
                logger("PRUNE SKIP missing dir ${dirFile.absolutePath}")
                continue
            }

            logger("PRUNE DIR ${dirFile.absolutePath}")
            dirFile.listFiles()?.forEach { child ->
                if (!child.isFile) return@forEach
                val relativePath = normalizeRelativePath(child.absolutePath.removePrefix(File(targetRoot).absolutePath).trimStart('/'))
                if (relativePath in managedTargets) return@forEach
                logger("PRUNE DELETE ${child.absolutePath}")
                if (!child.delete()) {
                    throw IllegalStateException("prune delete failed for ${child.absolutePath}")
                }
                prunedCount += 1
            }
        }

        logger("PRUNE DONE $prunedCount files")
        return prunedCount
    }

    private fun normalizeRelativePath(value: String): String = value.replace('\\', '/').trimStart('/')

    private fun sha256(file: File): String {
        val digest = MessageDigest.getInstance("SHA-256")
        FileInputStream(file).use { input ->
            val buffer = ByteArray(DEFAULT_BUFFER_SIZE)
            while (true) {
                val count = input.read(buffer)
                if (count <= 0) break
                digest.update(buffer, 0, count)
            }
        }
        return digest.digest().joinToString(separator = "") { byte -> "%02x".format(byte) }
    }

    private fun sha256(bytes: ByteArray): String {
        val digest = MessageDigest.getInstance("SHA-256").digest(bytes)
        return digest.joinToString(separator = "") { byte -> "%02x".format(byte) }
    }
}

data class SyncResult(
    val restartPolicy: String,
    val appliedCount: Int,
    val prunedCount: Int,
)


# Ballbox Machine Ads Sync

Standalone Android sidecar repo for Ballbox machine ad/media sync.

## Scope
- one activity
- manual `Sync now` button
- no Compose
- no emulator setup
- no polling yet
- no auth yet
- no APK restart automation yet

## Why this shape
The goal is to keep project size and machine complexity low for the first real test.
Current source tree size is intentionally tiny.

## Current defaults
- manifest URL: `https://ballbox.app/api/machines/2601070188/ads-manifest`
- target root: `/sdcard/TcnFolder`

## Current behavior
- fetch manifest JSON
- download changed files only
- validate sha256
- write exact relative paths under target root
- show logs on screen
- report restart policy from backend

## Important note
This project was scaffolded without installing an emulator on `ballbox-first`.
It is not yet built on this machine because Android build tooling/wrapper is not present locally.
The code is ready for Android Studio or an existing Gradle/SDK setup.

## Next step
- open in Android Studio on a machine with Android SDK
- add Gradle wrapper there
- build APK
- install on the vending machine
- test one folder-driven slot first


**Searching project files**

I'm thinking that the user's installed APK syncs directly. They mentioned it enqueues on tap, so maybe it's a different project. I should look into WorkManager within the main app and see if I can locate "sidecar." I might find it in the directory /home/sebas/work/projects/ballbox. So, let’s start searching through that folder to find relevant files or references! It would help clarify what's going on.

cd /home/sebas/work/projects/ballbox && rg -n "Sync now|sync now|WorkManager|enqueue|OneTimeWorkRequest|sidecar|ads sync|machine ads" . 2>/dev/null | head -300

cd /home/sebas/work/projects/ballbox-machine-ads-sync && git log --oneline --decorate -n 10 && echo '---' && git status --short && echo '---tags---' && git tag | tail -20


./android/machine-ads-sync/README.md:1:# Ballbox machine ads sync
./android/machine-ads-sync/README.md:3:Android sidecar for TCN media sync.
./android/machine-ads-sync/README.md:6:- manual `Sync now`
./android/machine-ads-sync/README.md:26:- if real changes were applied, sidecar tries to bring the main app to front
./android/machine-ads-sync/README.md:29:This sidecar can reliably sync files.
./pnpm-lock.yaml:3751:  use-sidecar@1.1.3:
./pnpm-lock.yaml:7034:      use-sidecar: 1.1.3(@types/react@19.2.10)(react@19.2.0)
./pnpm-lock.yaml:7528:  use-sidecar@1.1.3(@types/react@19.2.10)(react@19.2.0):
./android/machine-ads-sync/app/src/main/res/layout/activity_main.xml:16:            android:text="Ballbox machine ads sync"
./android/machine-ads-sync/app/src/main/res/layout/activity_main.xml:24:            android:text="Boot + periodic sidecar sync for TCN media folders." />
./android/machine-ads-sync/app/src/main/res/layout/activity_main.xml:77:            android:text="Sync now" />
./lib/tvs-player-runtime-core.ts:108:  function enqueueImpressionRetry(queue: ImpressionRetryItem[], item: ImpressionRetryItem) {
./lib/tvs-player-runtime-core.ts:374:    const queue = enqueueImpressionRetry(readQueue(), createImpressionRetryItem(screenId, creativeId));
./lib/tvs-runtime.ts:75:export function enqueueImpressionRetry(queue: ImpressionRetryItem[], item: ImpressionRetryItem) {
./tests/unit/tvs/runtime.test.ts:5:  enqueueImpressionRetry,
./tests/unit/tvs/runtime.test.ts:56:    const bounded = queue.reduce((items, item) => enqueueImpressionRetry(items, item), [] as typeof queue);
./docs/tcn-api-driven-machine-ads-rfc-2026-06-08.md:1:# TCN API-driven machine ads RFC
./docs/tcn-api-driven-machine-ads-rfc-2026-06-08.md:4:Move Ballbox machine ad/media control from hardcoded repo mappings to API-managed desired state so future changes do not require rebuilding or reinstalling the Android sidecar.
./docs/tcn-api-driven-machine-ads-rfc-2026-06-08.md:7:- Installed sidecar can sync successfully on Android 7.1.2 once `minSdk` and storage behavior are fixed.
./docs/tcn-api-driven-machine-ads-rfc-2026-06-08.md:12:- Current sidecar prune behavior can delete stale files inside managed folders.
./docs/tcn-api-driven-machine-ads-rfc-2026-06-08.md:25:The sidecar should:
./docs/tcn-api-driven-machine-ads-rfc-2026-06-08.md:87:- update sidecar default target root to `/sdcard/TcnFolder`
./docs/tcn-api-driven-machine-ads-rfc-2026-06-08.md:88:- keep sidecar reinstalls rare
./docs/tcn-api-driven-machine-ads-rfc-2026-06-08.md:91:- sidecar runs automatically after boot with ~10 second delay
./docs/tcn-api-driven-machine-ads-rfc-2026-06-08.md:92:- sidecar repeats sync periodically in background
./docs/tcn-api-driven-machine-ads-rfc-2026-06-08.md:93:- sidecar keeps a manual operator menu reachable from an accessible entrypoint instead of hiding sync behind install-time flows
./docs/tcn-api-driven-machine-ads-rfc-2026-06-08.md:95:  - sync now
./docs/tcn-api-driven-machine-ads-rfc-2026-06-08.md:123:4. update Android sidecar default root to `/sdcard/TcnFolder`
./docs/tcn-remote-ads-autonomy-2026-06-06.md:9:The active research direction is to control machine ads/media through the Android runtime and known machine file paths instead of depending on Yunshu cloud entitlements.
./docs/tcn-remote-ads-autonomy-2026-06-06.md:118:### Option A — sidecar updater service
./docs/tcn-remote-ads-autonomy-2026-06-06.md:129:Keep the cloned app mostly intact and add a sidecar updater just for content replacement.
./docs/index.md:59:- [TCN API-driven machine ads RFC](./tcn-api-driven-machine-ads-rfc-2026-06-08.md)


a51e8ca (HEAD -> main, origin/main) Initial Android sidecar MVP for machine ads sync
---
 M README.md
 M app/build.gradle.kts
 M app/src/main/AndroidManifest.xml
 M app/src/main/java/app/ballbox/machineadssync/MachineAdsSyncEngine.kt
 M app/src/main/java/app/ballbox/machineadssync/MainActivity.kt
 M app/src/main/res/layout/activity_main.xml
---tags---


cd /home/sebas/work/projects/ballbox/android/machine-ads-sync && find app/src/main/java/app/ballbox/machineadssync -maxdepth 2 -type f | sort


package app.ballbox.machineadssync

import android.Manifest
import android.content.pm.PackageManager
import android.os.Build
import android.os.Bundle
import androidx.appcompat.app.AppCompatActivity
import androidx.core.app.ActivityCompat
import androidx.core.content.ContextCompat
import app.ballbox.machineadssync.databinding.ActivityMainBinding

class MainActivity : AppCompatActivity() {
    private lateinit var binding: ActivityMainBinding

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        binding = ActivityMainBinding.inflate(layoutInflater)
        setContentView(binding.root)

        ensureStoragePermission()

        val config = SyncConfig.read(this)
        binding.manifestUrlInput.setText(config.manifestUrl)
        binding.targetRootInput.setText(config.targetRoot)
        binding.intervalMinutesInput.setText(config.intervalMinutes.toString())
        binding.bootEnabledCheckbox.isChecked = config.bootEnabled
        binding.mainAppPackageInput.setText(config.mainAppPackage)
        binding.logText.text = "Ready"

        binding.saveButton.setOnClickListener {
            val snapshot = persistConfig() ?: return@setOnClickListener
            binding.statusText.text = "Saved"
            appendLog("Saved config. interval=${snapshot.intervalMinutes}m boot=${snapshot.bootEnabled}")
            MachineAdsSyncService.start(this)
        }

        binding.syncButton.setOnClickListener {
            val snapshot = persistConfig() ?: return@setOnClickListener
            binding.statusText.text = "Sync queued"
            appendLog("Queued sync for ${snapshot.targetRoot}")
            MachineAdsSyncService.start(this, MachineAdsSyncService.ACTION_SYNC_NOW)
        }

        binding.openMainAppButton.setOnClickListener {
            val snapshot = persistConfig() ?: return@setOnClickListener
            val opened = MainAppController.bringMainAppToFront(this, snapshot.mainAppPackage)
            binding.statusText.text = if (opened) "Main app opened" else "Could not open main app"
        }
    }

    private fun persistConfig(): SyncConfig.Snapshot? {
        val manifestUrl = binding.manifestUrlInput.text?.toString()?.trim().orEmpty()
        val targetRoot = binding.targetRootInput.text?.toString()?.trim().orEmpty()
        val intervalMinutesText = binding.intervalMinutesInput.text?.toString()?.trim().orEmpty()
        val mainAppPackage = binding.mainAppPackageInput.text?.toString()?.trim().orEmpty()

        if (manifestUrl.isEmpty() || targetRoot.isEmpty()) {
            binding.statusText.text = "Manifest URL and target root are required"
            return null
        }

        val intervalMinutes = intervalMinutesText.toIntOrNull()
        if (intervalMinutes == null || intervalMinutes < 1) {
            binding.statusText.text = "Interval must be >= 1 minute"
            return null
        }

        SyncConfig.write(
            context = this,
            manifestUrl = manifestUrl,
            targetRoot = targetRoot,
            intervalMinutes = intervalMinutes,
            bootEnabled = binding.bootEnabledCheckbox.isChecked,
            mainAppPackage = mainAppPackage,
        )

        return SyncConfig.read(this)
    }

    private fun appendLog(line: String) {
        val previous = binding.logText.text?.toString().orEmpty()
        binding.logText.text = if (previous.isBlank()) line else "$previous\n$line"
    }

    private fun ensureStoragePermission() {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
            return
        }
        val missing = buildList {
            if (ContextCompat.checkSelfPermission(this@MainActivity, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
                add(Manifest.permission.WRITE_EXTERNAL_STORAGE)
            }
            if (ContextCompat.checkSelfPermission(this@MainActivity, Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
                add(Manifest.permission.READ_EXTERNAL_STORAGE)
            }
        }
        if (missing.isNotEmpty()) {
            ActivityCompat.requestPermissions(this, missing.toTypedArray(), 100)
        }
    }
}


ENOENT: no such file or directory, access '/home/sebas/work/projects/ballbox/android/machine-ads-sync/app/src/main/java/app/ballbox/machineadssync/SyncWorker.kt'


# Ballbox machine ads sync

Android sidecar for TCN media sync.

## Current scope
- manual `Sync now`
- boot start after Android boot
- periodic background sync
- target root default `/sdcard/TcnFolder`
- managed-dir prune from manifest
- best-effort reopen of main TCN app after real file changes

## Current defaults
- manifest URL: `https://ballbox.app/api/machines/2601070188/ads-manifest`
- target root: `/sdcard/TcnFolder`
- interval: `15` minutes
- main app package: `com.tcn.vending`

## Behavior
- boot receiver starts service
- service waits ~10s before first sync
- service keeps running foreground and reschedules periodic sync
- sync downloads changed files only
- validates sha256
- prunes stale files only inside manifest `managedDirs`
- if real changes were applied, sidecar tries to bring the main app to front

## Important limitation
This sidecar can reliably sync files.
It cannot guarantee a true process-level restart of another app without elevated privileges.
Current implementation does a best-effort relaunch/open of the main app package.

## Reality target
Built for kiosk-style Android machine use, not Play Store delivery.
Storage permissions and target SDK are kept practical for Android 7.1.2-era hardware.


package app.ballbox.machineadssync

import android.app.Notification
import android.app.NotificationChannel
import android.app.NotificationManager
import android.app.Service
import android.content.Context
import android.content.Intent
import android.os.Build
import android.os.Handler
import android.os.IBinder
import android.os.Looper
import androidx.core.app.NotificationCompat
import java.util.concurrent.atomic.AtomicBoolean

class MachineAdsSyncService : Service() {
    private val handler = Handler(Looper.getMainLooper())
    private val syncRunning = AtomicBoolean(false)

    private val periodicRunnable = object : Runnable {
        override fun run() {
            runSync("periodic")
            scheduleNextTick()
        }
    }

    override fun onCreate() {
        super.onCreate()
        startForeground(NOTIFICATION_ID, buildNotification("Idle"))
    }

    override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
        when (intent?.action) {
            ACTION_SYNC_NOW -> runSync("manual")
            ACTION_BOOT_SYNC -> scheduleInitialTick(INITIAL_DELAY_MS)
            else -> scheduleInitialTick(INITIAL_DELAY_MS)
        }
        return START_STICKY
    }

    override fun onDestroy() {
        handler.removeCallbacksAndMessages(null)
        super.onDestroy()
    }

    override fun onBind(intent: Intent?): IBinder? = null

    private fun scheduleInitialTick(delayMs: Long) {
        handler.removeCallbacks(periodicRunnable)
        handler.postDelayed(periodicRunnable, delayMs)
        updateNotification("Next sync in ${delayMs / 1000}s")
    }

    private fun scheduleNextTick() {
        val intervalMinutes = SyncConfig.read(this).intervalMinutes.toLong().coerceAtLeast(1)
        val delayMs = intervalMinutes * 60_000L
        handler.removeCallbacks(periodicRunnable)
        handler.postDelayed(periodicRunnable, delayMs)
        updateNotification("Next sync in ${intervalMinutes}m")
    }

    private fun runSync(reason: String) {
        if (!syncRunning.compareAndSet(false, true)) {
            updateNotification("Sync already running")
            return
        }

        val config = SyncConfig.read(this)
        updateNotification("Syncing (${reason})")

        Thread {
            val result = runCatching {
                MachineAdsSyncEngine().sync(
                    manifestUrl = config.manifestUrl,
                    targetRoot = config.targetRoot,
                    logger = { line -> android.util.Log.i(TAG, line) },
                )
            }

            result.onSuccess { syncResult ->
                if (syncResult.changed) {
                    android.util.Log.i(TAG, "Sync changed files. restartPolicy=${syncResult.restartPolicy}")
                    val relaunched = MainAppController.bringMainAppToFront(this, config.mainAppPackage)
                    android.util.Log.i(TAG, "Main app relaunch attempted=$relaunched")
                }
                updateNotification(
                    if (syncResult.changed) {
                        "Synced ${syncResult.appliedCount} changes"
                    } else {
                        "No changes"
                    }
                )
            }.onFailure { error ->
                android.util.Log.e(TAG, "Sync failed", error)
                updateNotification("Sync failed: ${error.message ?: "unknown"}")
            }

            syncRunning.set(false)
        }.start()
    }

    private fun buildNotification(text: String): Notification {
        ensureChannel()
        return NotificationCompat.Builder(this, CHANNEL_ID)
            .setSmallIcon(android.R.drawable.stat_sys_download_done)
            .setContentTitle("Ballbox sync")
            .setContentText(text)
            .setOngoing(true)
            .setOnlyAlertOnce(true)
            .build()
    }

    private fun updateNotification(text: String) {
        val manager = getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
        manager.notify(NOTIFICATION_ID, buildNotification(text))
    }

    private fun ensureChannel() {
        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.O) return
        val manager = getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
        val channel = NotificationChannel(CHANNEL_ID, "Ballbox sync", NotificationManager.IMPORTANCE_LOW)
        manager.createNotificationChannel(channel)
    }

    companion object {
        private const val TAG = "MachineAdsSyncService"
        private const val CHANNEL_ID = "ballbox_machine_sync"
        private const val NOTIFICATION_ID = 1001
        private const val INITIAL_DELAY_MS = 10_000L

        const val ACTION_SYNC_NOW = "app.ballbox.machineadssync.action.SYNC_NOW"
        const val ACTION_BOOT_SYNC = "app.ballbox.machineadssync.action.BOOT_SYNC"

        fun start(context: Context, action: String? = null) {
            val intent = Intent(context, MachineAdsSyncService::class.java).apply {
                this.action = action
            }
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
                context.startForegroundService(intent)
            } else {
                context.startService(intent)
            }
        }
    }
}


package app.ballbox.machineadssync

import android.content.BroadcastReceiver
import android.content.Context
import android.content.Intent

class BootReceiver : BroadcastReceiver() {
    override fun onReceive(context: Context, intent: Intent?) {
        val action = intent?.action.orEmpty()
        if (action != Intent.ACTION_BOOT_COMPLETED && action != Intent.ACTION_MY_PACKAGE_REPLACED) {
            return
        }
        val config = SyncConfig.read(context)
        if (!config.bootEnabled) {
            return
        }
        MachineAdsSyncService.start(context, MachineAdsSyncService.ACTION_BOOT_SYNC)
    }
}


package app.ballbox.machineadssync

import android.content.Context

object SyncConfig {
    private const val PREFS = "machine_ads_sync"
    private const val KEY_MANIFEST_URL = "manifest_url"
    private const val KEY_TARGET_ROOT = "target_root"
    private const val KEY_INTERVAL_MINUTES = "interval_minutes"
    private const val KEY_BOOT_ENABLED = "boot_enabled"
    private const val KEY_MAIN_APP_PACKAGE = "main_app_package"

    const val DEFAULT_MANIFEST_URL = "https://ballbox.app/api/machines/2601070188/ads-manifest"
    const val DEFAULT_TARGET_ROOT = "/sdcard/TcnFolder"
    const val DEFAULT_INTERVAL_MINUTES = 15
    const val DEFAULT_BOOT_ENABLED = true
    const val DEFAULT_MAIN_APP_PACKAGE = "com.tcn.vending"

    data class Snapshot(
        val manifestUrl: String,
        val targetRoot: String,
        val intervalMinutes: Int,
        val bootEnabled: Boolean,
        val mainAppPackage: String,
    )

    fun read(context: Context): Snapshot {
        val prefs = context.getSharedPreferences(PREFS, Context.MODE_PRIVATE)
        return Snapshot(
            manifestUrl = prefs.getString(KEY_MANIFEST_URL, DEFAULT_MANIFEST_URL).orEmpty(),
            targetRoot = prefs.getString(KEY_TARGET_ROOT, DEFAULT_TARGET_ROOT).orEmpty(),
            intervalMinutes = prefs.getInt(KEY_INTERVAL_MINUTES, DEFAULT_INTERVAL_MINUTES).coerceAtLeast(1),
            bootEnabled = prefs.getBoolean(KEY_BOOT_ENABLED, DEFAULT_BOOT_ENABLED),
            mainAppPackage = prefs.getString(KEY_MAIN_APP_PACKAGE, DEFAULT_MAIN_APP_PACKAGE).orEmpty(),
        )
    }

    fun write(
        context: Context,
        manifestUrl: String,
        targetRoot: String,
        intervalMinutes: Int,
        bootEnabled: Boolean,
        mainAppPackage: String,
    ) {
        context.getSharedPreferences(PREFS, Context.MODE_PRIVATE)
            .edit()
            .putString(KEY_MANIFEST_URL, manifestUrl)
            .putString(KEY_TARGET_ROOT, targetRoot)
            .putInt(KEY_INTERVAL_MINUTES, intervalMinutes.coerceAtLeast(1))
            .putBoolean(KEY_BOOT_ENABLED, bootEnabled)
            .putString(KEY_MAIN_APP_PACKAGE, mainAppPackage)
            .apply()
    }
}


<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android">

    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
    <uses-permission android:name="android.permission.WAKE_LOCK" />
    <uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />

    <application
        android:allowBackup="true"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/Theme.BallboxMachineAdsSync">
        <activity
            android:name=".MainActivity"
            android:exported="true">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

        <service
            android:name=".MachineAdsSyncService"
            android:enabled="true"
            android:exported="false" />

        <receiver
            android:name=".BootReceiver"
            android:enabled="true"
            android:exported="true">
            <intent-filter>
                <action android:name="android.intent.action.BOOT_COMPLETED" />
                <action android:name="android.intent.action.MY_PACKAGE_REPLACED" />
            </intent-filter>
        </receiver>
    </application>

</manifest>


**Investigating Android build environment**

I need to find out if the Android build environment is set up on my laptop. It's possible that the monorepo contains a gradlew file, which could be a key component. So, I'll check that and see if everything's in order. This process might be a bit detail-oriented, but it's essential to ensure everything works smoothly for my development tasks. Let's see what I can discover!

cd /home/sebas/work/projects/ballbox/android/machine-ads-sync && ls -la && find . -maxdepth 2 \( -name gradlew -o -name local.properties -o -name '*.keystore' \) -print

cd /home/sebas/work/projects/ballbox/android/machine-ads-sync && sed -n '1,220p' app/build.gradle.kts && echo '---' && sed -n '1,220p' build.gradle.kts


total 28
drwxr-xr-x 3 sebas sebas 4096 Jun  6 18:02 .
drwxr-xr-x 3 sebas sebas 4096 Jun  6 18:00 ..
drwxr-xr-x 3 sebas sebas 4096 Jun  6 18:01 app
-rw-r--r-- 1 sebas sebas  142 Jun  6 18:00 build.gradle.kts
-rw-r--r-- 1 sebas sebas  136 Jun  6 18:00 gradle.properties
-rw-r--r-- 1 sebas sebas 1238 Jun  8 23:06 README.md
-rw-r--r-- 1 sebas sebas  336 Jun  6 18:00 settings.gradle.kts


plugins {
    id("com.android.application")
    id("org.jetbrains.kotlin.android")
}

android {
    namespace = "app.ballbox.machineadssync"
    compileSdk = 34

    defaultConfig {
        applicationId = "app.ballbox.machineadssync"
        minSdk = 25
        targetSdk = 28
        versionCode = 6
        versionName = "0.1.6"
    }

    buildTypes {
        release {
            isMinifyEnabled = false
            proguardFiles(
                getDefaultProguardFile("proguard-android-optimize.txt"),
                "proguard-rules.pro"
            )
        }
    }

    compileOptions {
        sourceCompatibility = JavaVersion.VERSION_17
        targetCompatibility = JavaVersion.VERSION_17
    }

    kotlinOptions {
        jvmTarget = "17"
    }

    buildFeatures {
        viewBinding = true
    }
}

dependencies {
    implementation("androidx.core:core-ktx:1.13.1")
    implementation("androidx.appcompat:appcompat:1.7.0")
    implementation("com.google.android.material:material:1.12.0")
}
---
plugins {
    id("com.android.application") version "8.5.2" apply false
    id("org.jetbrains.kotlin.android") version "1.9.24" apply false
}


**Considering build options**

I need to figure out why gradlew is absent. Maybe I can build on my laptop using the Android SDK. I wonder if I can utilize Gradle if it's already installed? Checking for that could simplify things. I just want to ensure I have everything in place to proceed smoothly with the build process. It’s always better to double-check these details before diving in!

which gradle || true; which javac || true; echo ANDROID_HOME=$ANDROID_HOME; echo ANDROID_SDK_ROOT=$ANDROID_SDK_ROOT; ls /home/sebas/Android 2>/dev/null; ls /mnt/rpi/Android 2>/dev/null


ANDROID_HOME=
ANDROID_SDK_ROOT=

Command exited with code 2


**Evaluating sync improvements**

I need to consider using laptop helpers to enhance the process through laptop-run. First, I should modify the code to inspect the layout and check if the status text works well. It might be better to implement immediate sync in both the activity and service schedule. Instead of a service call, I can make the button directly sync in the activity, and start the service on save. I also wonder if I should add broadcast logs, but maybe I'll skip that for now. It’s time to edit MainActivity!

edit

import android.os.Build
import android.os.Bundle
import androidx.appcompat.app.AppCompatActivity
import androidx.core.app.ActivityCompat
import androidx.core.content.ContextCompat
import app.ballbox.machineadssync.databinding.ActivityMainBinding

class MainActivity : AppCompatActivity() {
    private lateinit var binding: ActivityMainBinding

import android.os.Build
import android.os.Bundle
import androidx.appcompat.app.AppCompatActivity
import androidx.core.app.ActivityCompat
import androidx.core.content.ContextCompat
import app.ballbox.machineadssync.databinding.ActivityMainBinding
import java.util.concurrent.atomic.AtomicBoolean

class MainActivity : AppCompatActivity() {
    private lateinit var binding: ActivityMainBinding
    private val manualSyncRunning = AtomicBoolean(false)

        binding.syncButton.setOnClickListener {
            val snapshot = persistConfig() ?: return@setOnClickListener
            binding.statusText.text = "Sync queued"
            appendLog("Queued sync for ${snapshot.targetRoot}")
            MachineAdsSyncService.start(this, MachineAdsSyncService.ACTION_SYNC_NOW)
        }

        binding.syncButton.setOnClickListener {
            val snapshot = persistConfig() ?: return@setOnClickListener
            startManualSync(snapshot)
        }

    private fun startManualSync(snapshot: SyncConfig.Snapshot) {
        if (!manualSyncRunning.compareAndSet(false, true)) {
            binding.statusText.text = "Sync already running"
            appendLog("Sync already running")
            return
        }

        binding.syncButton.isEnabled = false
        binding.statusText.text = "Syncing now"
        appendLog("Starting immediate sync for ${snapshot.targetRoot}")

        Thread {
            val result = runCatching {
                MachineAdsSyncEngine().sync(
                    manifestUrl = snapshot.manifestUrl,
                    targetRoot = snapshot.targetRoot,
                    logger = { line -> runOnUiThread { appendLog(line) } },
                )
            }

            runOnUiThread {
                manualSyncRunning.set(false)
                binding.syncButton.isEnabled = true

                result.onSuccess { syncResult ->
                    if (syncResult.changed) {
                        val opened = MainAppController.bringMainAppToFront(this, snapshot.mainAppPackage)
                        appendLog("Main app reopen attempted=$opened")
                    }
                    binding.statusText.text = if (syncResult.changed) {
                        "Sync OK"
                    } else {
                        "No changes"
                    }
                    appendLog("Done. Applied ${syncResult.appliedCount} changed files. Pruned ${syncResult.prunedCount} stale files.")
                    MachineAdsSyncService.start(this)
                }.onFailure { error ->
                    binding.statusText.text = "Sync failed"
                    appendLog("ERROR ${error.javaClass.simpleName}: ${error.message}")
                }
            }
        }.start()
    }

    private fun appendLog(line: String) {
        val previous = binding.logText.text?.toString().orEmpty()
        binding.logText.text = if (previous.isBlank()) line else "$previous\n$line"
    }


Successfully replaced 3 block(s) in /home/sebas/work/projects/ballbox/android/machine-ads-sync/app/src/main/java/app/ballbox/machineadssync/MainActivity.kt.

     ...
   7 import androidx.appcompat.app.AppCompatActivity
   8 import androidx.core.app.ActivityCompat
   9 import androidx.core.content.ContextCompat
  10 import app.ballbox.machineadssync.databinding.ActivityMainBinding
+ 11 import java.util.concurrent.atomic.AtomicBoolean
  11
  12 class MainActivity : AppCompatActivity() {
  13     private lateinit var binding: ActivityMainBinding
+ 15     private val manualSyncRunning = AtomicBoolean(false)
  14
  15     override fun onCreate(savedInstanceState: Bundle?) {
  16         super.onCreate(savedInstanceState)
  17         binding = ActivityMainBinding.inflate(layoutInflater)
     ...
  35         }
  36
  37         binding.syncButton.setOnClickListener {
  38             val snapshot = persistConfig() ?: return@setOnClickListener
- 39             binding.statusText.text = "Sync queued"
- 40             appendLog("Queued sync for ${snapshot.targetRoot}")
- 41             MachineAdsSyncService.start(this, MachineAdsSyncService.ACTION_SYNC_NOW)
+ 41             startManualSync(snapshot)
  42         }
  43
  44         binding.openMainAppButton.setOnClickListener {
  45             val snapshot = persistConfig() ?: return@setOnClickListener
     ...
  76
  77         return SyncConfig.read(this)
  78     }
  79
+ 80     private fun startManualSync(snapshot: SyncConfig.Snapshot) {
+ 81         if (!manualSyncRunning.compareAndSet(false, true)) {
+ 82             binding.statusText.text = "Sync already running"
+ 83             appendLog("Sync already running")
+ 84             return
+ 85         }
+ 86
+ 87         binding.syncButton.isEnabled = false
+ 88         binding.statusText.text = "Syncing now"
+ 89         appendLog("Starting immediate sync for ${snapshot.targetRoot}")
+ 90
+ 91         Thread {
+ 92             val result = runCatching {
+ 93                 MachineAdsSyncEngine().sync(
+ 94                     manifestUrl = snapshot.manifestUrl,
+ 95                     targetRoot = snapshot.targetRoot,
+ 96                     logger = { line -> runOnUiThread { appendLog(line) } },
+ 97                 )
+ 98             }
+ 99
+100             runOnUiThread {
+101                 manualSyncRunning.set(false)
+102                 binding.syncButton.isEnabled = true
+103
+104                 result.onSuccess { syncResult ->
+105                     if (syncResult.changed) {
+106                         val opened = MainAppController.bringMainAppToFront(this, snapshot.mainAppPackage)
+107                         appendLog("Main app reopen attempted=$opened")
+108                     }
+109                     binding.statusText.text = if (syncResult.changed) {
+110                         "Sync OK"
+111                     } else {
+112                         "No changes"
+113                     }
+114                     appendLog("Done. Applied ${syncResult.appliedCount} changed files. Pruned ${syncResult.prunedCount} stale files.")
+115                     MachineAdsSyncService.start(this)
+116                 }.onFailure { error ->
+117                     binding.statusText.text = "Sync failed"
+118                     appendLog("ERROR ${error.javaClass.simpleName}: ${error.message}")
+119                 }
+120             }
+121         }.start()
+122     }
+123
  80     private fun appendLog(line: String) {
  81         val previous = binding.logText.text?.toString().orEmpty()
  82         binding.logText.text = if (previous.isBlank()) line else "$previous\n$line"
  83     }
     ...

--- /home/sebas/work/projects/ballbox/android/machine-ads-sync/app/src/main/java/app/ballbox/machineadssync/MainActivity.kt
+++ /home/sebas/work/projects/ballbox/android/machine-ads-sync/app/src/main/java/app/ballbox/machineadssync/MainActivity.kt
@@ -7,11 +7,13 @@
 import androidx.appcompat.app.AppCompatActivity
 import androidx.core.app.ActivityCompat
 import androidx.core.content.ContextCompat
 import app.ballbox.machineadssync.databinding.ActivityMainBinding
+import java.util.concurrent.atomic.AtomicBoolean

 class MainActivity : AppCompatActivity() {
     private lateinit var binding: ActivityMainBinding
+    private val manualSyncRunning = AtomicBoolean(false)

     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         binding = ActivityMainBinding.inflate(layoutInflater)
@@ -35,11 +37,9 @@
         }

         binding.syncButton.setOnClickListener {
             val snapshot = persistConfig() ?: return@setOnClickListener
-            binding.statusText.text = "Sync queued"
-            appendLog("Queued sync for ${snapshot.targetRoot}")
-            MachineAdsSyncService.start(this, MachineAdsSyncService.ACTION_SYNC_NOW)
+            startManualSync(snapshot)
         }

         binding.openMainAppButton.setOnClickListener {
             val snapshot = persistConfig() ?: return@setOnClickListener
@@ -76,8 +76,52 @@

         return SyncConfig.read(this)
     }

+    private fun startManualSync(snapshot: SyncConfig.Snapshot) {
+        if (!manualSyncRunning.compareAndSet(false, true)) {
+            binding.statusText.text = "Sync already running"
+            appendLog("Sync already running")
+            return
+        }
+
+        binding.syncButton.isEnabled = false
+        binding.statusText.text = "Syncing now"
+        appendLog("Starting immediate sync for ${snapshot.targetRoot}")
+
+        Thread {
+            val result = runCatching {
+                MachineAdsSyncEngine().sync(
+                    manifestUrl = snapshot.manifestUrl,
+                    targetRoot = snapshot.targetRoot,
+                    logger = { line -> runOnUiThread { appendLog(line) } },
+                )
+            }
+
+            runOnUiThread {
+                manualSyncRunning.set(false)
+                binding.syncButton.isEnabled = true
+
+                result.onSuccess { syncResult ->
+                    if (syncResult.changed) {
+                        val opened = MainAppController.bringMainAppToFront(this, snapshot.mainAppPackage)
+                        appendLog("Main app reopen attempted=$opened")
+                    }
+                    binding.statusText.text = if (syncResult.changed) {
+                        "Sync OK"
+                    } else {
+                        "No changes"
+                    }
+                    appendLog("Done. Applied ${syncResult.appliedCount} changed files. Pruned ${syncResult.prunedCount} stale files.")
+                    MachineAdsSyncService.start(this)
+                }.onFailure { error ->
+                    binding.statusText.text = "Sync failed"
+                    appendLog("ERROR ${error.javaClass.simpleName}: ${error.message}")
+                }
+            }
+        }.start()
+    }
+
     private fun appendLog(line: String) {
         val previous = binding.logText.text?.toString().orEmpty()
         binding.logText.text = if (previous.isBlank()) line else "$previous\n$line"
     }


        when (intent?.action) {
            ACTION_SYNC_NOW -> runSync("manual")
            ACTION_BOOT_SYNC -> scheduleInitialTick(INITIAL_DELAY_MS)
            else -> scheduleInitialTick(INITIAL_DELAY_MS)
        }

        when (intent?.action) {
            ACTION_SYNC_NOW -> runSync("manual")
            ACTION_BOOT_SYNC -> scheduleInitialTick(INITIAL_DELAY_MS)
            ACTION_RESCHEDULE -> scheduleNextTick()
            else -> scheduleInitialTick(INITIAL_DELAY_MS)
        }

        const val ACTION_SYNC_NOW = "app.ballbox.machineadssync.action.SYNC_NOW"
        const val ACTION_BOOT_SYNC = "app.ballbox.machineadssync.action.BOOT_SYNC"
        const val ACTION_RESCHEDULE = "app.ballbox.machineadssync.action.RESCHEDULE"


Successfully replaced 2 block(s) in /home/sebas/work/projects/ballbox/android/machine-ads-sync/app/src/main/java/app/ballbox/machineadssync/MachineAdsSyncService.kt.

     ...
  32     override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
  33         when (intent?.action) {
  34             ACTION_SYNC_NOW -> runSync("manual")
  35             ACTION_BOOT_SYNC -> scheduleInitialTick(INITIAL_DELAY_MS)
+ 36             ACTION_RESCHEDULE -> scheduleNextTick()
  36             else -> scheduleInitialTick(INITIAL_DELAY_MS)
  37         }
  38         return START_STICKY
  39     }
     ...
 129         private const val INITIAL_DELAY_MS = 10_000L
 130
 131         const val ACTION_SYNC_NOW = "app.ballbox.machineadssync.action.SYNC_NOW"
 132         const val ACTION_BOOT_SYNC = "app.ballbox.machineadssync.action.BOOT_SYNC"
+134         const val ACTION_RESCHEDULE = "app.ballbox.machineadssync.action.RESCHEDULE"
 133
 134         fun start(context: Context, action: String? = null) {
 135             val intent = Intent(context, MachineAdsSyncService::class.java).apply {
 136                 this.action = action
     ...

--- /home/sebas/work/projects/ballbox/android/machine-ads-sync/app/src/main/java/app/ballbox/machineadssync/MachineAdsSyncService.kt
+++ /home/sebas/work/projects/ballbox/android/machine-ads-sync/app/src/main/java/app/ballbox/machineadssync/MachineAdsSyncService.kt
@@ -32,8 +32,9 @@
     override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
         when (intent?.action) {
             ACTION_SYNC_NOW -> runSync("manual")
             ACTION_BOOT_SYNC -> scheduleInitialTick(INITIAL_DELAY_MS)
+            ACTION_RESCHEDULE -> scheduleNextTick()
             else -> scheduleInitialTick(INITIAL_DELAY_MS)
         }
         return START_STICKY
     }
@@ -129,8 +130,9 @@
         private const val INITIAL_DELAY_MS = 10_000L

         const val ACTION_SYNC_NOW = "app.ballbox.machineadssync.action.SYNC_NOW"
         const val ACTION_BOOT_SYNC = "app.ballbox.machineadssync.action.BOOT_SYNC"
+        const val ACTION_RESCHEDULE = "app.ballbox.machineadssync.action.RESCHEDULE"

         fun start(context: Context, action: String? = null) {
             val intent = Intent(context, MachineAdsSyncService::class.java).apply {
                 this.action = action


                    appendLog("Done. Applied ${syncResult.appliedCount} changed files. Pruned ${syncResult.prunedCount} stale files.")
                    MachineAdsSyncService.start(this)

                    appendLog("Done. Applied ${syncResult.appliedCount} changed files. Pruned ${syncResult.prunedCount} stale files.")
                    MachineAdsSyncService.start(this, MachineAdsSyncService.ACTION_RESCHEDULE)


Successfully replaced 1 block(s) in /home/sebas/work/projects/ballbox/android/machine-ads-sync/app/src/main/java/app/ballbox/machineadssync/MainActivity.kt.

     ...
 111                     } else {
 112                         "No changes"
 113                     }
 114                     appendLog("Done. Applied ${syncResult.appliedCount} changed files. Pruned ${syncResult.prunedCount} stale files.")
-115                     MachineAdsSyncService.start(this)
+115                     MachineAdsSyncService.start(this, MachineAdsSyncService.ACTION_RESCHEDULE)
 116                 }.onFailure { error ->
 117                     binding.statusText.text = "Sync failed"
 118                     appendLog("ERROR ${error.javaClass.simpleName}: ${error.message}")
 119                 }
     ...

--- /home/sebas/work/projects/ballbox/android/machine-ads-sync/app/src/main/java/app/ballbox/machineadssync/MainActivity.kt
+++ /home/sebas/work/projects/ballbox/android/machine-ads-sync/app/src/main/java/app/ballbox/machineadssync/MainActivity.kt
@@ -111,9 +111,9 @@
                     } else {
                         "No changes"
                     }
                     appendLog("Done. Applied ${syncResult.appliedCount} changed files. Pruned ${syncResult.prunedCount} stale files.")
-                    MachineAdsSyncService.start(this)
+                    MachineAdsSyncService.start(this, MachineAdsSyncService.ACTION_RESCHEDULE)
                 }.onFailure { error ->
                     binding.statusText.text = "Sync failed"
                     appendLog("ERROR ${error.javaClass.simpleName}: ${error.message}")
                 }


        versionCode = 6
        versionName = "0.1.6"

        versionCode = 7
        versionName = "0.1.7"


Successfully replaced 1 block(s) in /home/sebas/work/projects/ballbox/android/machine-ads-sync/app/build.gradle.kts.

    ...
 10     defaultConfig {
 11         applicationId = "app.ballbox.machineadssync"
 12         minSdk = 25
 13         targetSdk = 28
-14         versionCode = 6
-15         versionName = "0.1.6"
+14         versionCode = 7
+15         versionName = "0.1.7"
 16     }
 17
 18     buildTypes {
 19         release {
    ...

--- /home/sebas/work/projects/ballbox/android/machine-ads-sync/app/build.gradle.kts
+++ /home/sebas/work/projects/ballbox/android/machine-ads-sync/app/build.gradle.kts
@@ -10,10 +10,10 @@
     defaultConfig {
         applicationId = "app.ballbox.machineadssync"
         minSdk = 25
         targetSdk = 28
-        versionCode = 6
-        versionName = "0.1.6"
+        versionCode = 7
+        versionName = "0.1.7"
     }

     buildTypes {
         release {


**Considering README edits**

I think I need to mention something important in the README right away. It seems like a quick edit is necessary, so I'll keep it brief. Making sure to communicate effectively is key here, and I want to ensure the user understands what I mean. It’s all about clarity and conciseness, so I’ll focus on the essential points that need to be addressed. Let’s get that noted!

- manual `Sync now` runs immediately in-app

- service waits ~10s before first boot/app-start sync

- service keeps running foreground and reschedules periodic sync
- manual `Sync now` does not wait for the periodic queue


Successfully replaced 3 block(s) in /home/sebas/work/projects/ballbox/android/machine-ads-sync/README.md.

    ...
  2
  3 Android sidecar for TCN media sync.
  4
  5 ## Current scope
- 6 - manual `Sync now`
+ 6 - manual `Sync now` runs immediately in-app
  7 - boot start after Android boot
  8 - periodic background sync
  9 - target root default `/sdcard/TcnFolder`
 10 - managed-dir prune from manifest
    ...
 17 - main app package: `com.tcn.vending`
 18
 19 ## Behavior
 20 - boot receiver starts service
-21 - service waits ~10s before first sync
+21 - service waits ~10s before first boot/app-start sync
 22 - service keeps running foreground and reschedules periodic sync
+23 - manual `Sync now` does not wait for the periodic queue
 23 - sync downloads changed files only
 24 - validates sha256
 25 - prunes stale files only inside manifest `managedDirs`
 26 - if real changes were applied, sidecar tries to bring the main app to front
    ...

--- /home/sebas/work/projects/ballbox/android/machine-ads-sync/README.md
+++ /home/sebas/work/projects/ballbox/android/machine-ads-sync/README.md
@@ -2,9 +2,9 @@

 Android sidecar for TCN media sync.

 ## Current scope
-- manual `Sync now`
+- manual `Sync now` runs immediately in-app
 - boot start after Android boot
 - periodic background sync
 - target root default `/sdcard/TcnFolder`
 - managed-dir prune from manifest
@@ -17,10 +17,11 @@
 - main app package: `com.tcn.vending`

 ## Behavior
 - boot receiver starts service
-- service waits ~10s before first sync
+- service waits ~10s before first boot/app-start sync
 - service keeps running foreground and reschedules periodic sync
+- manual `Sync now` does not wait for the periodic queue
 - sync downloads changed files only
 - validates sha256
 - prunes stale files only inside manifest `managedDirs`
 - if real changes were applied, sidecar tries to bring the main app to front


**Validating compile logic**

I think I need to validate my compile logic using kotlinc, but I'm not entirely sure. Maybe I should just search for errors instead? It feels like validating could be a good step forward, but I don't want to overcomplicate things if it's unnecessary. I wonder what the best approach here would be: should I validate first or just look for errors directly? Alright, let’s explore this!

bash

cd /home/sebas/work/projects/ballbox/android/machine-ads-sync && sed -n '1,220p' app/src/main/java/app/ballbox/machineadssync/MainActivity.kt && echo '---' && sed -n '1,220p' app/src/main/java/app/ballbox/machineadssync/MachineAdsSyncService.kt


package app.ballbox.machineadssync

import android.Manifest
import android.content.pm.PackageManager
import android.os.Build
import android.os.Bundle
import androidx.appcompat.app.AppCompatActivity
import androidx.core.app.ActivityCompat
import androidx.core.content.ContextCompat
import app.ballbox.machineadssync.databinding.ActivityMainBinding
import java.util.concurrent.atomic.AtomicBoolean

class MainActivity : AppCompatActivity() {
    private lateinit var binding: ActivityMainBinding
    private val manualSyncRunning = AtomicBoolean(false)

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        binding = ActivityMainBinding.inflate(layoutInflater)
        setContentView(binding.root)

        ensureStoragePermission()

        val config = SyncConfig.read(this)
        binding.manifestUrlInput.setText(config.manifestUrl)
        binding.targetRootInput.setText(config.targetRoot)
        binding.intervalMinutesInput.setText(config.intervalMinutes.toString())
        binding.bootEnabledCheckbox.isChecked = config.bootEnabled
        binding.mainAppPackageInput.setText(config.mainAppPackage)
        binding.logText.text = "Ready"

        binding.saveButton.setOnClickListener {
            val snapshot = persistConfig() ?: return@setOnClickListener
            binding.statusText.text = "Saved"
            appendLog("Saved config. interval=${snapshot.intervalMinutes}m boot=${snapshot.bootEnabled}")
            MachineAdsSyncService.start(this)
        }

        binding.syncButton.setOnClickListener {
            val snapshot = persistConfig() ?: return@setOnClickListener
            startManualSync(snapshot)
        }

        binding.openMainAppButton.setOnClickListener {
            val snapshot = persistConfig() ?: return@setOnClickListener
            val opened = MainAppController.bringMainAppToFront(this, snapshot.mainAppPackage)
            binding.statusText.text = if (opened) "Main app opened" else "Could not open main app"
        }
    }

    private fun persistConfig(): SyncConfig.Snapshot? {
        val manifestUrl = binding.manifestUrlInput.text?.toString()?.trim().orEmpty()
        val targetRoot = binding.targetRootInput.text?.toString()?.trim().orEmpty()
        val intervalMinutesText = binding.intervalMinutesInput.text?.toString()?.trim().orEmpty()
        val mainAppPackage = binding.mainAppPackageInput.text?.toString()?.trim().orEmpty()

        if (manifestUrl.isEmpty() || targetRoot.isEmpty()) {
            binding.statusText.text = "Manifest URL and target root are required"
            return null
        }

        val intervalMinutes = intervalMinutesText.toIntOrNull()
        if (intervalMinutes == null || intervalMinutes < 1) {
            binding.statusText.text = "Interval must be >= 1 minute"
            return null
        }

        SyncConfig.write(
            context = this,
            manifestUrl = manifestUrl,
            targetRoot = targetRoot,
            intervalMinutes = intervalMinutes,
            bootEnabled = binding.bootEnabledCheckbox.isChecked,
            mainAppPackage = mainAppPackage,
        )

        return SyncConfig.read(this)
    }

    private fun startManualSync(snapshot: SyncConfig.Snapshot) {
        if (!manualSyncRunning.compareAndSet(false, true)) {
            binding.statusText.text = "Sync already running"
            appendLog("Sync already running")
            return
        }

        binding.syncButton.isEnabled = false
        binding.statusText.text = "Syncing now"
        appendLog("Starting immediate sync for ${snapshot.targetRoot}")

        Thread {
            val result = runCatching {
                MachineAdsSyncEngine().sync(
                    manifestUrl = snapshot.manifestUrl,
                    targetRoot = snapshot.targetRoot,
                    logger = { line -> runOnUiThread { appendLog(line) } },
                )
            }

            runOnUiThread {
                manualSyncRunning.set(false)
                binding.syncButton.isEnabled = true

                result.onSuccess { syncResult ->
                    if (syncResult.changed) {
                        val opened = MainAppController.bringMainAppToFront(this, snapshot.mainAppPackage)
                        appendLog("Main app reopen attempted=$opened")
                    }
                    binding.statusText.text = if (syncResult.changed) {
                        "Sync OK"
                    } else {
                        "No changes"
                    }
                    appendLog("Done. Applied ${syncResult.appliedCount} changed files. Pruned ${syncResult.prunedCount} stale files.")
                    MachineAdsSyncService.start(this, MachineAdsSyncService.ACTION_RESCHEDULE)
                }.onFailure { error ->
                    binding.statusText.text = "Sync failed"
                    appendLog("ERROR ${error.javaClass.simpleName}: ${error.message}")
                }
            }
        }.start()
    }

    private fun appendLog(line: String) {
        val previous = binding.logText.text?.toString().orEmpty()
        binding.logText.text = if (previous.isBlank()) line else "$previous\n$line"
    }

    private fun ensureStoragePermission() {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
            return
        }
        val missing = buildList {
            if (ContextCompat.checkSelfPermission(this@MainActivity, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
                add(Manifest.permission.WRITE_EXTERNAL_STORAGE)
            }
            if (ContextCompat.checkSelfPermission(this@MainActivity, Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
                add(Manifest.permission.READ_EXTERNAL_STORAGE)
            }
        }
        if (missing.isNotEmpty()) {
            ActivityCompat.requestPermissions(this, missing.toTypedArray(), 100)
        }
    }
}
---
package app.ballbox.machineadssync

import android.app.Notification
import android.app.NotificationChannel
import android.app.NotificationManager
import android.app.Service
import android.content.Context
import android.content.Intent
import android.os.Build
import android.os.Handler
import android.os.IBinder
import android.os.Looper
import androidx.core.app.NotificationCompat
import java.util.concurrent.atomic.AtomicBoolean

class MachineAdsSyncService : Service() {
    private val handler = Handler(Looper.getMainLooper())
    private val syncRunning = AtomicBoolean(false)

    private val periodicRunnable = object : Runnable {
        override fun run() {
            runSync("periodic")
            scheduleNextTick()
        }
    }

    override fun onCreate() {
        super.onCreate()
        startForeground(NOTIFICATION_ID, buildNotification("Idle"))
    }

    override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
        when (intent?.action) {
            ACTION_SYNC_NOW -> runSync("manual")
            ACTION_BOOT_SYNC -> scheduleInitialTick(INITIAL_DELAY_MS)
            ACTION_RESCHEDULE -> scheduleNextTick()
            else -> scheduleInitialTick(INITIAL_DELAY_MS)
        }
        return START_STICKY
    }

    override fun onDestroy() {
        handler.removeCallbacksAndMessages(null)
        super.onDestroy()
    }

    override fun onBind(intent: Intent?): IBinder? = null

    private fun scheduleInitialTick(delayMs: Long) {
        handler.removeCallbacks(periodicRunnable)
        handler.postDelayed(periodicRunnable, delayMs)
        updateNotification("Next sync in ${delayMs / 1000}s")
    }

    private fun scheduleNextTick() {
        val intervalMinutes = SyncConfig.read(this).intervalMinutes.toLong().coerceAtLeast(1)
        val delayMs = intervalMinutes * 60_000L
        handler.removeCallbacks(periodicRunnable)
        handler.postDelayed(periodicRunnable, delayMs)
        updateNotification("Next sync in ${intervalMinutes}m")
    }

    private fun runSync(reason: String) {
        if (!syncRunning.compareAndSet(false, true)) {
            updateNotification("Sync already running")
            return
        }

        val config = SyncConfig.read(this)
        updateNotification("Syncing (${reason})")

        Thread {
            val result = runCatching {
                MachineAdsSyncEngine().sync(
                    manifestUrl = config.manifestUrl,
                    targetRoot = config.targetRoot,
                    logger = { line -> android.util.Log.i(TAG, line) },
                )
            }

            result.onSuccess { syncResult ->
                if (syncResult.changed) {
                    android.util.Log.i(TAG, "Sync changed files. restartPolicy=${syncResult.restartPolicy}")
                    val relaunched = MainAppController.bringMainAppToFront(this, config.mainAppPackage)
                    android.util.Log.i(TAG, "Main app relaunch attempted=$relaunched")
                }
                updateNotification(
                    if (syncResult.changed) {
                        "Synced ${syncResult.appliedCount} changes"
                    } else {
                        "No changes"
                    }
                )
            }.onFailure { error ->
                android.util.Log.e(TAG, "Sync failed", error)
                updateNotification("Sync failed: ${error.message ?: "unknown"}")
            }

            syncRunning.set(false)
        }.start()
    }

    private fun buildNotification(text: String): Notification {
        ensureChannel()
        return NotificationCompat.Builder(this, CHANNEL_ID)
            .setSmallIcon(android.R.drawable.stat_sys_download_done)
            .setContentTitle("Ballbox sync")
            .setContentText(text)
            .setOngoing(true)
            .setOnlyAlertOnce(true)
            .build()
    }

    private fun updateNotification(text: String) {
        val manager = getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
        manager.notify(NOTIFICATION_ID, buildNotification(text))
    }

    private fun ensureChannel() {
        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.O) return
        val manager = getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
        val channel = NotificationChannel(CHANNEL_ID, "Ballbox sync", NotificationManager.IMPORTANCE_LOW)
        manager.createNotificationChannel(channel)
    }

    companion object {
        private const val TAG = "MachineAdsSyncService"
        private const val CHANNEL_ID = "ballbox_machine_sync"
        private const val NOTIFICATION_ID = 1001
        private const val INITIAL_DELAY_MS = 10_000L

        const val ACTION_SYNC_NOW = "app.ballbox.machineadssync.action.SYNC_NOW"
        const val ACTION_BOOT_SYNC = "app.ballbox.machineadssync.action.BOOT_SYNC"
        const val ACTION_RESCHEDULE = "app.ballbox.machineadssync.action.RESCHEDULE"

        fun start(context: Context, action: String? = null) {
            val intent = Intent(context, MachineAdsSyncService::class.java).apply {
                this.action = action
            }
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
                context.startForegroundService(intent)
            } else {
                context.startService(intent)
            }
        }
    }
}


**Evaluating project build options**

I need to ensure that there's a way to reschedule on failure to keep the periodic service running. Currently, there's no start on failure configured, but the service might already exist from a save or boot. I think building it via my laptop is the easiest option. I should check if the project is in git on my laptop, and I could potentially rsync the folder temporarily for the build. I may need to inspect if Gradle is installed with Android Studio.

which laptop-run && which laptop-rsync && which laptop-read


/home/sebas/pi-config/bin/laptop-run
/home/sebas/pi-config/bin/laptop-rsync
/home/sebas/pi-config/bin/laptop-read


**Checking Gradle installation**

I’m thinking I might need to generate a gradlew script, but wait, maybe using Gradle on my laptop is the better choice if I have it installed. I should double-check if it's indeed set up. It's important to make sure I have everything ready to proceed smoothly. Let me just verify that Gradle is installed before moving forward with anything.

laptop-run 'which gradle || true; which java || true; echo ANDROID_SDK_ROOT=$ANDROID_SDK_ROOT; ls -d /Users/sebas/Library/Android/sdk 2>/dev/null || true'

cd /home/sebas/work/projects/ballbox/android/machine-ads-sync && git diff -- app/src/main/java/app/ballbox/machineadssync/MainActivity.kt app/src/main/java/app/ballbox/machineadssync/MachineAdsSyncService.kt app/build.gradle.kts README.md


gradle not found
/usr/bin/java
ANDROID_SDK_ROOT=
/Users/sebas/Library/Android/sdk


(no output)


**Troubleshooting Gradle Issues**

I need to figure out if I'm using Android Studio correctly with Gradle. It seems like the `./gradlew` command might be missing. If Gradle is unavailable, generating a wrapper could be the solution. Maybe I should try using the bundled Gradle that comes with the studio through the launcher? Also, I think I need to inspect my laptop to see if there's any setup issue that might be causing this.

laptop-run 'ls -d /Applications/Android\ Studio.app 2>/dev/null || true; ls -d /Applications/Android\ Studio*.app 2>/dev/null || true; ls -d /Users/sebas/Library/Android/sdk/build-tools/* 2>/dev/null | tail -5; ls -d /Users/sebas/Library/Android/sdk/platforms/* 2>/dev/null | tail -5'


/Applications/Android Studio.app
/Applications/Android Studio.app
/Users/sebas/Library/Android/sdk/build-tools/33.0.1
/Users/sebas/Library/Android/sdk/build-tools/34.0.0
/Users/sebas/Library/Android/sdk/build-tools/36.1.0
/Users/sebas/Library/Android/sdk/platforms/android-34
/Users/sebas/Library/Android/sdk/platforms/android-36


laptop-run 'find ~/work -maxdepth 4 -path "*ballbox/android/machine-ads-sync" 2>/dev/null | head -20'


**Managing project sync and build**

I’m thinking about syncing the project to my laptop's temp directory and then building it. I should include the entire subproject—only that makes sense. I wonder if it’s necessary to create a wrapper for this process; maybe not. Instead, I could just use Gradle's distribution command directly. It seems straightforward, so let’s make sure to keep it efficient!

set -e
laptop-run 'mkdir -p ~/work/tmp/ballbox-machine-ads-sync-build'
laptop-rsync /home/sebas/work/projects/ballbox/android/machine-ads-sync/ ~/work/tmp/ballbox-machine-ads-sync-build/
laptop-run 'cd ~/work/tmp/ballbox-machine-ads-sync-build && printf "sdk.dir=/Users/sebas/Library/Android/sdk\n" > local.properties && if [ ! -d ~/work/tmp/gradle-8.7 ]; then curl -L -o ~/work/tmp/gradle-8.7-bin.zip https://services.gradle.org/distributions/gradle-8.7-bin.zip && cd ~/work/tmp && unzip -q -o gradle-8.7-bin.zip; fi && ~/work/tmp/gradle-8.7/bin/gradle --no-daemon assembleDebug'


sending incremental file list
rsync: [Receiver] mkdir "/home/sebas/work/tmp/ballbox-machine-ads-sync-build" failed: No such file or directory (2)
rsync error: error in file IO (code 11) at main.c(791) [Receiver=3.4.1]

Command exited with code 11


**Re-evaluating file path**

I'm thinking that I need to use the proper remote path, perhaps one that's absolute, such as under Users/sebas. It seems like I need to give it another try to ensure everything works correctly. I want to make sure I get this right since a proper file path is crucial for accessing the necessary files without issues. Let's retry and see if that resolves the problem!

set -e
laptop-run 'mkdir -p /Users/sebas/work/tmp/ballbox-machine-ads-sync-build /Users/sebas/work/tmp'
laptop-rsync /home/sebas/work/projects/ballbox/android/machine-ads-sync/ /Users/sebas/work/tmp/ballbox-machine-ads-sync-build/
laptop-run 'cd /Users/sebas/work/tmp/ballbox-machine-ads-sync-build && printf "sdk.dir=/Users/sebas/Library/Android/sdk\n" > local.properties && if [ ! -d /Users/sebas/work/tmp/gradle-8.7 ]; then curl -L -o /Users/sebas/work/tmp/gradle-8.7-bin.zip https://services.gradle.org/distributions/gradle-8.7-bin.zip && cd /Users/sebas/work/tmp && unzip -q -o gradle-8.7-bin.zip; fi && /Users/sebas/work/tmp/gradle-8.7/bin/gradle --no-daemon assembleDebug'


sending incremental file list
rsync: [Receiver] mkdir "/Users/sebas/work/tmp/ballbox-machine-ads-sync-build" failed: No such file or directory (2)
rsync error: error in file IO (code 11) at main.c(791) [Receiver=3.4.1]

Command exited with code 11


**Inspecting laptop-rsync helper usage**

I need to look into how the laptop-rsync helper is being used. Maybe I should check if the destination is relative. It seems like reading the script would really help clarify things. I wonder if there are specific parameters or configurations that I might be missing. I'll take my time and analyze it carefully to make sure I understand everything properly. There's a bit to unpack here!


#!/usr/bin/env bash
set -euo pipefail
host="${LAPTOP_HOST:-brag-pipe-fur-kneel.emperor-ratio.ts.net}"
port="${LAPTOP_PORT:-2222}"
key="${LAPTOP_SSH_KEY:-$HOME/.ssh/id_ed25519_laptop_agent}"
ssh_cmd=(ssh -p "$port" -o BatchMode=yes -o IdentitiesOnly=yes)
if [[ -f "$key" ]]; then
  ssh_cmd+=( -i "$key" )
fi
if [[ $# -lt 2 ]]; then
  echo "usage: laptop-rsync <src> <dest> [extra rsync args...]" >&2
  echo "examples:" >&2
  echo "  laptop-rsync ${host}:/Users/sebas/Downloads/file ./" >&2
  echo "  laptop-rsync ./file ${host}:/Users/sebas/Downloads/" >&2
  exit 2
fi
rsync -av --progress -e "${ssh_cmd[*]}" "$@"


set -e
host=brag-pipe-fur-kneel.emperor-ratio.ts.net
laptop-run 'mkdir -p /Users/sebas/work/tmp/ballbox-machine-ads-sync-build /Users/sebas/work/tmp'
laptop-rsync /home/sebas/work/projects/ballbox/android/machine-ads-sync/ ${host}:/Users/sebas/work/tmp/ballbox-machine-ads-sync-build/
laptop-run 'cd /Users/sebas/work/tmp/ballbox-machine-ads-sync-build && printf "sdk.dir=/Users/sebas/Library/Android/sdk\n" > local.properties && if [ ! -d /Users/sebas/work/tmp/gradle-8.7 ]; then curl -L -o /Users/sebas/work/tmp/gradle-8.7-bin.zip https://services.gradle.org/distributions/gradle-8.7-bin.zip && cd /Users/sebas/work/tmp && unzip -q -o gradle-8.7-bin.zip; fi && /Users/sebas/work/tmp/gradle-8.7/bin/gradle --no-daemon assembleDebug'


building file list ...
 0 files...
27 files to consider
./
README.md

          1,334 100%    0.00kB/s    0:00:00
          1,334 100%    0.00kB/s    0:00:00 (xfr#1, to-chk=25/27)
build.gradle.kts

            142 100%  138.67kB/s    0:00:00
            142 100%  138.67kB/s    0:00:00 (xfr#2, to-chk=24/27)
gradle.properties

            136 100%  132.81kB/s    0:00:00
            136 100%  132.81kB/s    0:00:00 (xfr#3, to-chk=23/27)
settings.gradle.kts

            336 100%  328.12kB/s    0:00:00
            336 100%  328.12kB/s    0:00:00 (xfr#4, to-chk=22/27)
app/
app/build.gradle.kts

          1,012 100%  988.28kB/s    0:00:00
          1,012 100%  988.28kB/s    0:00:00 (xfr#5, to-chk=20/27)
app/proguard-rules.pro

              0 100%    0.00kB/s    0:00:00 (xfr#6, to-chk=19/27)
app/src/
app/src/main/
app/src/main/AndroidManifest.xml

          1,620 100%    1.54MB/s    0:00:00
          1,620 100%    1.54MB/s    0:00:00 (xfr#7, to-chk=16/27)
app/src/main/java/
app/src/main/java/app/
app/src/main/java/app/ballbox/
app/src/main/java/app/ballbox/machineadssync/
app/src/main/java/app/ballbox/machineadssync/BootReceiver.kt

            625 100%  610.35kB/s    0:00:00
            625 100%  610.35kB/s    0:00:00 (xfr#8, to-chk=11/27)
app/src/main/java/app/ballbox/machineadssync/MachineAdsSyncEngine.kt

          4,849 100%    4.62MB/s    0:00:00
          4,849 100%    4.62MB/s    0:00:00 (xfr#9, to-chk=10/27)
app/src/main/java/app/ballbox/machineadssync/MachineAdsSyncService.kt

          5,389 100%    5.14MB/s    0:00:00
          5,389 100%    5.14MB/s    0:00:00 (xfr#10, to-chk=9/27)
app/src/main/java/app/ballbox/machineadssync/MainActivity.kt

          6,015 100%    5.74MB/s    0:00:00
          6,015 100%    5.74MB/s    0:00:00 (xfr#11, to-chk=8/27)
app/src/main/java/app/ballbox/machineadssync/MainAppController.kt

            583 100%  569.34kB/s    0:00:00
            583 100%  569.34kB/s    0:00:00 (xfr#12, to-chk=7/27)
app/src/main/java/app/ballbox/machineadssync/SyncConfig.kt

          2,185 100%    2.08MB/s    0:00:00
          2,185 100%    2.08MB/s    0:00:00 (xfr#13, to-chk=6/27)
app/src/main/res/
app/src/main/res/layout/
app/src/main/res/layout/activity_main.xml

          3,605 100%    3.44MB/s    0:00:00
          3,605 100%    3.44MB/s    0:00:00 (xfr#14, to-chk=3/27)
app/src/main/res/values/
app/src/main/res/values/strings.xml

             79 100%   77.15kB/s    0:00:00
             79 100%   77.15kB/s    0:00:00 (xfr#15, to-chk=1/27)
app/src/main/res/values/themes.xml

            587 100%  573.24kB/s    0:00:00
            587 100%  573.24kB/s    0:00:00 (xfr#16, to-chk=0/27)

sent 30,003 bytes  received 446 bytes  12,179.60 bytes/sec
total size is 28,497  speedup is 0.94
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed

  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
100   169  100   169    0     0    433      0 --:--:-- --:--:-- --:--:--   434

  0     0    0     0    0     0      0      0 --:--:--  0:00:01 --:--:--     0
  0     0    0     0    0     0      0      0 --:--:--  0:00:01 --:--:--     0

  2  127M    2 3726k    0     0  1879k      0  0:01:09  0:00:01  0:01:08 1879k
  7  127M    7 10.0M    0     0  3433k      0  0:00:38  0:00:02  0:00:36 6513k
 12  127M   12 16.5M    0     0  4250k      0  0:00:30  0:00:03  0:00:27 6600k
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 27  127M   27 35.6M    0     0  5228k      0  0:00:25  0:00:06  0:00:19 6556k
 32  127M   32 42.1M    0     0  5401k      0  0:00:24  0:00:07  0:00:17 6575k
 38  127M   38 48.6M    0     0  5545k      0  0:00:23  0:00:08  0:00:15 6575k
 43  127M   43 55.1M    0     0  5654k      0  0:00:23  0:00:09  0:00:14 6404k
 48  127M   48 62.0M    0     0  5786k      0  0:00:22  0:00:10  0:00:12 6749k
 53  127M   53 68.7M    0     0  5873k      0  0:00:22  0:00:11  0:00:11 6774k
 58  127M   58 74.7M    0     0  5896k      0  0:00:22  0:00:12  0:00:10 6685k
 61  127M   61 78.3M    0     0  5735k      0  0:00:22  0:00:13  0:00:09 6077k
 66  127M   66 84.5M    0     0  5778k      0  0:00:22  0:00:14  0:00:08 6026k
 69  127M   69 89.4M    0     0  5730k      0  0:00:22  0:00:15  0:00:07 5609k
 73  127M   73 93.8M    0     0  5654k      0  0:00:23  0:00:16  0:00:07 5128k
 76  127M   76 98.2M    0     0  5588k      0  0:00:23  0:00:18  0:00:05 4792k
 80  127M   80  103M    0     0  5546k      0  0:00:23  0:00:19  0:00:04 5029k
 83  127M   83  107M    0     0  5506k      0  0:00:23  0:00:19  0:00:04 4688k
 87  127M   87  111M    0     0  5459k      0  0:00:24  0:00:20  0:00:04 4592k
 90  127M   90  116M    0     0  5413k      0  0:00:24  0:00:21  0:00:03 4592k
 94  127M   94  120M    0     0  5374k      0  0:00:24  0:00:22  0:00:02 4603k
 99  127M   99  126M    0     0  5421k      0  0:00:24  0:00:23  0:00:01 4932k
100  127M  100  127M    0     0  5428k      0  0:00:24  0:00:24 --:--:-- 5058k
To honour the JVM settings for this build a single-use Daemon process will be forked. For more on this, please refer to https://docs.gradle.org/8.7/userguide/gradle_daemon.html#sec:disabling_the_daemon in the Gradle documentation.
Daemon will be stopped at the end of the build

FAILURE: Build failed with an exception.

* What went wrong:
Directory '/Users/sebas/work/tmp' does not contain a Gradle build.

A Gradle build should contain a 'settings.gradle' or 'settings.gradle.kts' file in its root directory. It may also contain a 'build.gradle' or 'build.gradle.kts' file.

To create a new Gradle build in this directory run 'gradle init'

For more information about the 'init' task, please refer to https://docs.gradle.org/8.7/userguide/build_init_plugin.html in the Gradle documentation.

For more details on creating a Gradle build, please refer to https://docs.gradle.org/8.7/userguide/tutorial_using_tasks.html in the Gradle documentation.

* Try:
> Run gradle init to create a new Gradle build in this directory.
> Run with --stacktrace option to get the stack trace.
> Run with --info or --debug option to get more log output.
> Get more help at https://help.gradle.org.

BUILD FAILED in 945ms

Command exited with code 1


laptop-run 'set -e; if [ ! -d /Users/sebas/work/tmp/gradle-8.7 ]; then curl -L -o /Users/sebas/work/tmp/gradle-8.7-bin.zip https://services.gradle.org/distributions/gradle-8.7-bin.zip && unzip -q -o /Users/sebas/work/tmp/gradle-8.7-bin.zip -d /Users/sebas/work/tmp; fi; cd /Users/sebas/work/tmp/ballbox-machine-ads-sync-build && printf "sdk.dir=/Users/sebas/Library/Android/sdk\n" > local.properties && /Users/sebas/work/tmp/gradle-8.7/bin/gradle --no-daemon assembleDebug'


To honour the JVM settings for this build a single-use Daemon process will be forked. For more on this, please refer to https://docs.gradle.org/8.7/userguide/gradle_daemon.html#sec:disabling_the_daemon in the Gradle documentation.
Daemon will be stopped at the end of the build

FAILURE: Build failed with an exception.

* What went wrong:
A problem occurred configuring root project 'machine-ads-sync'.
> Could not resolve all artifacts for configuration ':classpath'.
   > Could not resolve com.android.tools.build:gradle:8.5.2.
     Required by:
         project : > com.android.application:com.android.application.gradle.plugin:8.5.2
      > No matching variant of com.android.tools.build:gradle:8.5.2 was found. The consumer was configured to find a library for use during runtime, compatible with Java 8, packaged as a jar, and its dependencies declared externally, as well as attribute 'org.gradle.plugin.api-version' with value '8.7' but:
          - Variant 'apiElements' declares a library, packaged as a jar, and its dependencies declared externally:
              - Incompatible because this component declares a component for use during compile-time, compatible with Java 11 and the consumer needed a component for use during runtime, compatible with Java 8
              - Other compatible attribute:
                  - Doesn't say anything about org.gradle.plugin.api-version (required '8.7')
          - Variant 'javadocElements' declares a component for use during runtime, and its dependencies declared externally:
              - Incompatible because this component declares documentation and the consumer needed a library
              - Other compatible attributes:
                  - Doesn't say anything about its elements (required them packaged as a jar)
                  - Doesn't say anything about its target Java version (required compatibility with Java 8)
                  - Doesn't say anything about org.gradle.plugin.api-version (required '8.7')
          - Variant 'runtimeElements' declares a library for use during runtime, packaged as a jar, and its dependencies declared externally:
              - Incompatible because this component declares a component, compatible with Java 11 and the consumer needed a component, compatible with Java 8
              - Other compatible attribute:
                  - Doesn't say anything about org.gradle.plugin.api-version (required '8.7')
          - Variant 'sourcesElements' declares a component for use during runtime, and its dependencies declared externally:
              - Incompatible because this component declares documentation and the consumer needed a library
              - Other compatible attributes:
                  - Doesn't say anything about its elements (required them packaged as a jar)
                  - Doesn't say anything about its target Java version (required compatibility with Java 8)
                  - Doesn't say anything about org.gradle.plugin.api-version (required '8.7')

* Try:
> Review the variant matching algorithm at https://docs.gradle.org/8.7/userguide/variant_attributes.html#sec:abm_algorithm.
> No matching variant errors are explained in more detail at https://docs.gradle.org/8.7/userguide/variant_model.html#sub:variant-no-match.
> Run with --stacktrace option to get the stack trace.
> Run with --info or --debug option to get more log output.
> Run with --scan to get full insights.
> Get more help at https://help.gradle.org.

BUILD FAILED in 2s

Command exited with code 1


**Checking Java version requirements**

I need to figure out if I should use Java 17 explicitly on my laptop. It seems like gradle might be using Java 8, but I'm not sure. I should check the path at /usr/libexec/java_home to see which version is currently being used. It’s important to have the correct version for my project, so I’ll need to verify that to avoid any compatibility issues. Let's make sure everything is set up properly!

laptop-run '/usr/libexec/java_home -V 2>&1 || true; java -version 2>&1'


Matching Java Virtual Machines (1):
    1.8.0_472 (arm64) "Amazon" - "Amazon Corretto 8" /Users/sebas/Library/Java/JavaVirtualMachines/corretto-1.8.0_472/Contents/Home
/Users/sebas/Library/Java/JavaVirtualMachines/corretto-1.8.0_472/Contents/Home
openjdk version "1.8.0_472"
OpenJDK Runtime Environment Corretto-8.472.08.1 (build 1.8.0_472-b08)
OpenJDK 64-Bit Server VM Corretto-8.472.08.1 (build 25.472-b08, mixed mode)