CODEWITHSUNDEEP
androidgradle
Venator85
Venator85

Reputation: 10335

Add Gradle task dependency only if task is invoked by another task

I'm trying to add two "setup" and "cleanup" tasks that should be executed at the beginning and at the end of the build only if the build is invoked via a certain task.

In the following example, the setupTask and cleanupTask should only be executed, at the beginning and at the end of the build, if and only if the build was launched by the releaseX task.

The line marked with (1) makes the releaseX task depend on the corresponding assembleX task, so that a standard Android build is produced.

The line marked with (2) is the key line that should make setupTask to be invoked at the beginning of the build. This is the line for which I'm asking for help, because setupTask is always invoked, and not only when launching the build via releaseX as I would like.

The line marked with (3) performs the cleanup jobs at the end of the build.

Can you help me?

apply plugin: 'com.android.application'

android {
    //...
    defaultConfig {
        //...
    }
    signingConfigs {
        //...
    }
    productFlavors {
        //...
    }
    buildTypes {
        //...
    }
}

android.applicationVariants.all { variant ->
    if (variant.buildType.name == 'release') {
        def flavor = variant.productFlavors[0]
        def releaseTask = tasks.create(name: "release" + flavor.name.capitalize(), type: Copy) << {
            //...
        }
        releaseTask.dependsOn variant.assemble     // (1)
        variant.preBuild.dependsOn setupTask       // (2)
        releaseTask.finalizedBy cleanupTask        // (3)
    }
}

task setupTask << {
    // ...
}

task cleanupTask << {
    // ...
}

dependencies {
    // ...
}

Upvotes: 1

Views: 765

Answers (2)

Venator85
Venator85

Reputation: 10335

Another way is the following, albeit much less elegant than Henry's answer.

The dependency of preBuild on setupTask is always declared, but setupTask is disabled if the task graph doesn't contain a releaseX task.

android.applicationVariants.all { variant ->
    if (variant.buildType.name == 'release') {
        def flavor = variant.productFlavors[0]
        def releaseTask = tasks.create(name: "release" + flavor.name.capitalize(), type: Copy) << {
            //...
        }
        releaseTask.dependsOn variant.assemble
        variant.preBuild.dependsOn setupTask
        releaseTask.finalizedBy cleanupTask

        gradle.taskGraph.whenReady {taskGraph ->
            if (!(taskGraph.allTasks.any { it.name.startsWith("release") })) {
                setupTask.enabled = false
            }
        }
    }
}

Upvotes: 0

Henry
Henry

Reputation: 43738

You can specify, that releaseTask.dependsOn setupTask and that variant.preBuild.mustRunAfter setupTask.

The mustRunAfter specifies an ordering but not a dependency.

I did not try that, it may or may not work.

Upvotes: 2

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