Add build.gradle.kts plugin setup specifics to readme

[0x330a]

Needed to do some digging around to how to set up a build.gradle.kts with a lot of trial and error, I think I've got it mostly.

to apply the plugin in a module's build.gradle.kts:

plugins {
    // ...
    id("org.mozilla.rust-android-gradle.rust-android") version "0.9.3"
}

to configure the plugin in a module's build.gradle.kts

extensions.configure(CargoExtension::class) {
    module = "[module name]"
    libname = "[libname]"
    // ...
}

to set a build dependency (This seems to work for me but not sure if it's the best method):

tasks.preBuild.configure {
    dependsOn.add(tasks.withType(CargoBuildTask::class.java))
}

Additionally, it seems that the most recent template for adding plugins in an Android build.gradle.kts setup puts the plugin (without applying) in the project level build.gradle.kts like so:

plugins {
    // ...
    id("org.mozilla.rust-android-gradle.rust-android") version "0.9.3" apply false
}

Could probably do a PR myself but not sure where exactly these instructions would best fit

[MarijnS95]

Thanks a lot for these details! I ended up changing the build-time dependencies to apply to merge{Debug,Release}JniLibFolders instead using MergeSourceSetFolders as described in #118 (comment), and had a little struggle to figure out how to turn an ["arm64"] array into a list. I can still configure the extension directly via a cargo object in the root though:

cargo {
    module = "../android_vulkan_interop"
    libname = "android_vulkan_interop"
    targets = listOf("arm64")
}

project.afterEvaluate {
    tasks.withType(com.nishtahir.CargoBuildTask::class)
        .forEach { buildTask ->
            tasks.withType(com.android.build.gradle.tasks.MergeSourceSetFolders::class)
                .configureEach {
                    this.inputs.dir(
                        layout.buildDirectory.dir("rustJniLibs" + File.separatorChar + buildTask.toolchain!!.folder)
                    )
                    this.dependsOn(buildTask)
                }
        }
}

See here for the whole project: https://github.com/MarijnS95/AndroidVulkanInterop

[xz-dev]

Thanks, the last step is very important and also we need add pluginManagement as that

[chiichen]

You need to place the cargo gradle plugin before others. Otherwise, a wiered "Duplicate Resource" error would likely occur. Details here

[MarijnS95]

Thanks for linking that @chiichen, that indeed fixes the Duplicate Resource error when upgrading AGP (com.android.application) beyond 8.2.0, to i.e. the mentioned 8.4.1 or 8.5.0. The dependency change linked above is still required too.

[chiichen]

Thanks for linking that @chiichen, that indeed fixes the Duplicate Resource error when upgrading AGP (com.android.application) beyond 8.2.0, to i.e. the mentioned 8.4.1 or 8.5.0. The dependency change linked above is still required too.

Thanks for your answer! However, I am using AGP with version 8.5.0 but this error still appears in my project. Besides, my build.gradle.kts is as follows, and it seems that it can work properly without adding the rustJniLibs path (is it fixed by the latest version?)

cargo {
  //...
}

project.afterEvaluate {
    tasks.withType(com.nishtahir.CargoBuildTask::class)
        .forEach { buildTask ->
            tasks.withType(com.android.build.gradle.tasks.MergeSourceSetFolders::class)
                .configureEach {
                    this.dependsOn(buildTask)
                }
        }
}

[MarijnS95]

@chiichen this might be caused by a prior successful build: the library will be picked up in the APK, but it will always be an older version. If you skip adding rustJniLibs to the inputs of MergeSourceSetFolders, and do a clean build, the file should be missing.

Note that I've only tested this on my Gradle project, I'll test it on a gradle.kts setup soon. UPDATE: The Duplicate Resources error is solved in the same way: MarijnS95/AndroidVulkanInterop@d05231c