Namespace not specified. Specify a namespace in the module's build file

[MrCsabaToth]

Describe the bug After trying to upgrade my Flutter app's Android port to AGP v8.0+ I get an error message:

A problem occurred configuring project ':uni_links'.
> Could not create an instance of type com.android.build.api.variant.impl.LibraryVariantBuilderImpl.
   > Namespace not specified. Specify a namespace in the module's build file. See https://d.android.com/r/tools/upgrade-assistant/set-namespace for information about setting the namespace.

I depend on uni_links 0.5.1 in my app. I just tried to upgrade the Android side of the Flutter app to AGP 8.0+ (to be precise it's AGP 8.1 now), because Android Studio brings up the upgrade assistant for the last half year about this. The upgrade fails because some of the plugins don't have the namespace in their build.gradle. On of the failing plugins is the uni_links.

To Reproduce Steps to reproduce the behavior:

1. Have a Flutter app with Android port and AGP 7.4 (or any AGP version below 8.0)
2. Open the Android folder of the project with Android Studio
3. The AGP upgrade assistant will pop up
4. Let the AGP upgrading assistant try the upgrade and it gonna fail

Expected behavior I'd be able to upgrade to AGP 8.0+.

Smartphone (please complete the following information):

• Device: OnePlus Nord EU (AC2003), Android 12
• OS: Devuan GNU/Linux 6 (excalibur/ceres) 6.4.0-1-amd64, locale en_US.UTF-8
• Flutter version: Channel beta, 3.13.0-0.2.pre

Additional context The way Flutter Community projects solve this is adding a conditional clause to the build.gradle:

android {
    // Conditional for compatibility with AGP <4.2.
    if (project.android.hasProperty("namespace")) {
        namespace 'name.avioli.unilinks'
    }

    compileSdkVersion 28

    defaultConfig {
        minSdkVersion 16
        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }
    lintOptions {
        disable 'InvalidPackage'
    }
}

[MrCsabaToth]

Do you need a PR?

[MrCsabaToth]

There's the PR

[victorien-a]

Here is to get it to work until PR is merged:

uni_links: git: url: https://github.com/DanMossa/uni_links.git path: uni_links/

[avioli]

This package is now marked as discontinued and app_links recommended replacement.