Apply configuration to specific projects in gradle build script - groovy

Question

I have a gradle project that has java applications as well as android applications.
root/
build.gradle
settings.gradle
java1/
java2/
android1/
android2/
java3/
etc.
What is the best practice for structuring my build script? I am a total gradle novice and am migrating the project from maven to gradle.
I wanted to do something instead of
configure(subprojects) {}
to apply plugins and other specific things.
such as
configure(java1, java2, java3) { // java specifics }
configure(android1, android2) { // android specifics }
I am probably approaching this from the wrong way.
More explicitly I need to apply the plugin java only for the java projects and the android plugin for the android projects.

Answer 1

configure(subprojects.findAll {it.name == "java1" || it.name == "java2"}) {
Under the filtering section in the guide
Hope this helps someone else out.

Answer 2

There are multiple ways, depending on what you want... Some examples:
// Configures just project java1
project(":java1") { ... }
// Configures projects java1 and java2
["java1","java2"].each { name ->
project(":$name") { ... }
}
You can use normal groovy to find/iterate over all the projects.

Answer 3

Another option:
configure([ project(':sub1'), project(':sub2'), ... ]) {
...
}

Answer 4

The shortest and easiest option:
configure(subprojects.findAll()) {
if (it.name.equals('MY_PROJECT')) {
...
} else {
...
}
}

Answer 5

Another approach...
In the settings.gradle you do define your projects like this:
gradle.ext.javaProjects=[]
gradle.ext.androidProjects=[]
javaProject('java1')
javaProject('java2')
javaProject('java3')
androidProject('android1')
androidProject('android2')
def javaProject(String name) {
gradle.ext.javaProjects.add(name)
include ":$name"
}
def androidProject(String name) {
gradle.ext.androidProjects.add(name)
include ":$name"
}
Now you can reference those in your root build.gradle:
def javaProjects = subprojects.findAll {gradle.ext.javaProjects.contains(it.name)};
def androidProjects = subprojects.findAll {gradle.ext.javaProjects.contains(it.name)};
configure(javaProjects) {
...
}
configure(androidProjects) {
...
}
Maybe thats overkill... but i usually have the project definition method in my settings.gradle anyway. E.g. if you want to put all java projects under a java folder you could define things like this:
def javaProject(String name) {
gradle.ext.javaProjects.add(name)
include ":$name"
project(":$name").projectDir = file('java/'+ name)
}