Is there a way to list task dependencies in Gradle

问题:

./gradle tasks lists "some" of the tasks. Looking at http://gradle.org/docs/current/userguide/java_plugin.html there are hidden ones not listed. Also, other plugins will not have such a nice pretty graph of the dependencies between tasks.

Is there a way to

1. list all the tasks in all plugins with gradle
2. list the tasks and what tasks they depend on (sort of like maven's depenceny:tree but for tasks)

回答1:

you can use the --all flag to get a more detailed listing of the available tasks and the task dependencies

gradle tasks --all

EDIT: as noted by Radim in the comments, this command does not report dependencies, for gradle 3.3 and newer.

回答2:

list the tasks and what tasks they depend on (sort of like maven's depenceny:tree but for tasks)

for this you can use --dry-run (or -m) option which lists tasks which are executed in order for particular command, but does not execute the command, e.g.

gradle assemble --dry-run

you can find more here

回答3:

You can try com.dorongold.task-tree plugin with simple usage:

gradle <task 1>...<task N> taskTree

回答4:

gradle --profile clean build

Once this is complete, go to build/reports/profile folder and browse the .html file. You'll see dependencies resolution and other info with time it took in a nice html page.

回答5:

You can stick this into your build.gradle:

gradle.taskGraph.whenReady {taskGraph ->
    println "Found task graph: " + taskGraph
    println "Found " + taskGraph.allTasks.size() + " tasks."
    taskGraph.allTasks.forEach { task ->
        println task
        task.dependsOn.forEach { dep ->
            println "  - " + dep
        }
    }
}

Then run your task with gradle:

./gradlew build

And you should see this:

Found task graph: org.gradle.execution.taskgraph.DefaultTaskGraphExecuter@36eb780c
Found 19 tasks.
task ':compileJava'
  - task 'compileJava' input files
task ':compileScala'
  - task 'compileScala' input files
  - compileJava
task ':processResources'
  - task 'processResources' input files
task ':classes'
  - org.gradle.api.internal.tasks.DefaultTaskDependency@287a7782
  - task 'classes' input files
  - compileJava
  - dirs
  - compileScala
  - processResources
task ':jar'
  - task 'jar' input files
task ':assemble'
  - task 'assemble' input files
  - org.gradle.api.internal.artifacts.DefaultPublishArtifactSet$ArtifactsTaskDependency@5bad9616
task ':compileTestJava'
    - task 'compileTestJava' input files
task ':compileTestScala'
  - task 'compileTestScala' input files
  - compileTestJava
task ':processTestResources'
  - task 'processTestResources' input files
task ':testClasses'
  - processTestResources
  - task 'testClasses' input files
  - compileTestScala
  - org.gradle.api.internal.tasks.DefaultTaskDependency@42c1fa08
  - compileTestJava
  - dirs
task ':compileIntegrationTestJava'
  - task 'compileIntegrationTestJava' input files
task ':compileIntegrationTestScala'
  - task 'compileIntegrationTestScala' input files
  - compileIntegrationTestJava
task ':processIntegrationTestResources'
  - task 'processIntegrationTestResources' input files
task ':integrationTestClasses'
  - processIntegrationTestResources
  - compileIntegrationTestJava
  - org.gradle.api.internal.tasks.DefaultTaskDependency@7c8aa0fe
  - compileIntegrationTestScala
  - dirs
  - task 'integrationTestClasses' input files
task ':composeUp'
  - task 'composeUp' input files
task ':integrationTest'
  - task ':composeUp'
  - task 'integrationTest' input files
task ':test'
  - task 'test' input files
task ':check'
  - task 'check' input files
  - task ':test'
  - task ':integrationTest'
task ':build'
  - task 'build' input files
  - check
  - assemble

回答6:

You can programmatically access the task graph to inspect it within the build script using Gradle.getTaskGraph()

回答7:

As your multiproject grows, the solution I marked as correct grows a bit unweildy and hard to read

gradle tasks --all

Instead, I have moved over to looking at a specific project making it much easier

gradlew :full-httpproxy:tasks --all

where 'full-httpproxy' is the name of my project(and directory as is typical).

I am however curious how to list tasks on the master/root project though and have an outstanding question here as well

How to list all tasks for the master project only in gradle?

as doing that doesn't seem possible right now.