feat(build): update Gradle configuration with support for slim and full build variants, and implement fetching of repository bundled wheels

android/app/build.gradle

@@ -5,6 +5,7 @@ plugins {
 
 def repoRoot = rootProject.projectDir.parentFile
 def meshchatSourceDir = new File(repoRoot, "meshchatx")
+def repositoryBundledWheelsDir = new File(meshchatSourceDir, "public/repository-server-bundled/bundled")
 def chaquopyBuildPython = System.getenv("CHAQUOPY_BUILD_PYTHON")
 def pythonTempDir = new File(buildDir, "python-tmp")
 def vendorWheelDir = new File(rootProject.projectDir, "vendor")
@@ -23,12 +24,35 @@ def invalidAndroidAbis = selectedAndroidAbis.findAll { !allAndroidAbis.contains(
 if (!invalidAndroidAbis.isEmpty()) {
     throw new org.gradle.api.GradleException("Unsupported ABIs: ${invalidAndroidAbis}. Supported: ${allAndroidAbis}")
 }
-def enableAbiSplits = selectedAndroidAbis.size() > 1
+
+def meshchatxAbiPackaging = (
+    project.findProperty("meshchatxAbiPackaging")
+        ?: System.getenv("MESHCHATX_ABI_PACKAGING")
+        ?: "universal"
+).toString().trim().toLowerCase()
+if (meshchatxAbiPackaging != "universal" && meshchatxAbiPackaging != "split") {
+    throw new org.gradle.api.GradleException(
+        "meshchatxAbiPackaging must be 'universal' or 'split' (got '${meshchatxAbiPackaging}'). " +
+            "Use -PmeshchatxAbiPackaging=... or MESHCHATX_ABI_PACKAGING."
+    )
+}
+def enableAbiSplits = meshchatxAbiPackaging == "split" && selectedAndroidAbis.size() > 1
 
 android {
     namespace 'com.meshchatx'
     compileSdk 34
 
+    flavorDimensions "pythonBundle"
+    productFlavors {
+        slim {
+            dimension "pythonBundle"
+            isDefault true
+        }
+        full {
+            dimension "pythonBundle"
+        }
+    }
+
     defaultConfig {
         applicationId "com.meshchatx"
         minSdk 24
@@ -73,30 +97,64 @@ android {
     }
 }
 
-tasks.register("syncMeshchatPython", Sync) {
-    if (!meshchatSourceDir.exists()) {
-        throw new org.gradle.api.GradleException("Missing meshchatx source directory at ${meshchatSourceDir}")
+tasks.register("fetchRepositoryBundledWheels", Exec) {
+    workingDir = repoRoot
+    def pyExe = (System.getenv("MESHCHATX_FETCH_PYTHON") ?: "python3")
+    commandLine(pyExe, "scripts/build/fetch_repository_wheels.py")
+    ignoreExitValue = false
+    onlyIf {
+        if (System.getenv("MESHCHATX_SKIP_REPOSITORY_WHEELS_FETCH") == "1") {
+            return false
+        }
+        if (!repositoryBundledWheelsDir.isDirectory()) {
+            return true
+        }
+        def names = repositoryBundledWheelsDir.list()
+        return names == null || !names.any { it.endsWith(".whl") }
     }
-    doFirst {
-        // Remove legacy vendored packages so pip-installed dependencies are used.
-        delete(
-            file("$projectDir/src/main/python/LXST"),
-            file("$projectDir/src/main/python/LXMF"),
-            file("$projectDir/src/main/python/RNS")
-        )
-    }
-    from(meshchatSourceDir)
-    includeEmptyDirs = false
-    into(file("$projectDir/src/main/python/meshchatx"))
 }
 
-tasks.named("preBuild") {
-    dependsOn(tasks.named("syncMeshchatPython"))
+def registerMeshchatPythonSync = { String bundle ->
+    def cap = bundle.capitalize()
+    tasks.register("syncMeshchatPython${cap}", Sync) {
+        if (bundle == "full") {
+            dependsOn("fetchRepositoryBundledWheels")
+        }
+        if (!meshchatSourceDir.exists()) {
+            throw new org.gradle.api.GradleException("Missing meshchatx source directory at ${meshchatSourceDir}")
+        }
+        doFirst {
+            delete(
+                file("$projectDir/src/main/python/meshchatx"),
+                file("$projectDir/src/main/python/LXST"),
+                file("$projectDir/src/main/python/LXMF"),
+                file("$projectDir/src/main/python/RNS")
+            )
+        }
+        from(meshchatSourceDir) {
+            if (bundle == "slim") {
+                exclude("src/frontend/**")
+                exclude("public/reticulum-docs-bundled/**")
+                exclude("public/rnode-flasher/**")
+                exclude("public/repository-server-bundled/**")
+            }
+        }
+        includeEmptyDirs = false
+        from(new File(repoRoot, "CHANGELOG.md"))
+        into(file("$projectDir/src/${bundle}/python/meshchatx"))
+    }
 }
 
+registerMeshchatPythonSync("slim")
+registerMeshchatPythonSync("full")
+
 tasks.configureEach { task ->
     if (task.name.toLowerCase().contains("merge") && task.name.toLowerCase().contains("pythonsources")) {
-        task.dependsOn(tasks.named("syncMeshchatPython"))
+        if (task.name.contains("Slim")) {
+            task.dependsOn(tasks.named("syncMeshchatPythonSlim"))
+        } else if (task.name.contains("Full")) {
+            task.dependsOn(tasks.named("syncMeshchatPythonFull"))
+        }
     }
 }
 
@@ -128,6 +186,7 @@ chaquopy {
                 throw new org.gradle.api.GradleException("Missing vendor wheel directory at ${vendorWheelDir}")
             }
             options "--find-links", vendorWheelDir.absolutePath
+            install "packaging>=23"
             install "aiohttp==3.13.3"
             install "rns>=1.1.5"
             install "lxmf>=0.9.4"
@@ -163,4 +222,3 @@ dependencies {
     androidTestImplementation 'androidx.test.ext:junit:1.1.5'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.5.1'
 }
-