Execute gradle task on sub projects

Question

I have a MultiModule gradle project that I am trying to configure.

Root     projA     projB     other         projC         projD         projE         ... 

What I want to be able to do is have a task in the root build.gradle which will execute the buildJar task in each of the projects in the other directory.

I know I can do

configure(subprojects.findAll {it.name != 'tropicalFish'}) {     task hello << { task -> println "$task.project.name"} } 

But this will also get projA and projB, I want to only run the task on c,d,e... Please let me know the best way to achieve this.

Answer 1

Not entirely sure which of these you're after, but they should cover your bases.

1. Calling the tasks directly

You should just be able to call

gradle :other/projC:hello :other/projD:hello 

I tested this with:

# Root/build.gradle allprojects {     task hello << { task -> println "$task.project.name" } } 

and

# Root/settings.gradle include 'projA' include 'projB' include 'other/projC' include 'other/projD' 

2. Only creating tasks in the sub projects

Or is it that you only want the task created on the other/* projects?

If the latter, then the following works:

# Root/build.gradle allprojects {     if (project.name.startsWith("other/")) {         task hello << { task -> println "$task.project.name" }     } } 

and it can then be called with:

$ gradle hello :other/projC:hello other/projC :other/projD:hello other/projD 

3. Creating a task that runs tasks in the subprojects only

This version matches my reading of your question meaning there's already a task on the subprojects (buildJar), and creating a task in root that will only call the subprojects other/*:buildJar

allprojects {     task buildJar << { task -> println "$task.project.name" }     if (project.name.startsWith("other/")) {         task runBuildJar(dependsOn: buildJar) {}     } } 

This creates a task "buildJar" on every project, and "runBuildJar" on the other/* projects only, so you can call:

$ gradle runBuildJar :other/projC:buildJar other/projC :other/projC:runBuildJar :other/projD:buildJar other/projD :other/projD:runBuildJar 

Your question can be read many ways, hope this covers them all :)

Answer 2

I found this question today because I have the same issue. All of the ways mentioned by Mark can be used but all of them have some cons. So I am adding one more option:

4. Switching the current project

gradle -p other hello 

This switches the "current project" and then runs all tasks named hello under the current project.