IHMC Build Plugin

Composite build and IDE classpath separation support for JVM Gradle projects.

Main features

• Seperate source set classpaths when building projects in IDEs
• Utilize composite builds to make each project standalone by default

Contents

1. Properties
2. Commands
3. Creating a new project
4. Groups of projects
5. Troubleshooting
6. Learn more
7. Future plans

Properties

title - The "Title Cased Name" of your project. This will be converted to kebab and Pascal casing in various build phases. (i.e. "title-cased-name" and "TitleCasedName")

extraSourceSets - Classpath separated "source sets" that have their own dependencies and are published in separate artifacts. (i.e. ["test", "visualizers"]) These will be represented by Gradle subprojects under the hood and located where Gradle would normally place its concept of source sets. ihmc-build takes care of setting up the "test" source set project as if it were a normal source set.

compositeSearchHeight - When building from this directory, set how many directories to go up and search for builds to include. If this is not the root project, this setting is ignored.

excludeFromCompositeBuild - "Opt out" of being included in other composite builds. This setting is ignored if this project is the build root.

(optional) publishUrl - See publishing commands below. Defaults to "local"

(optional) projectGroup - If this project exists only to contain other ihmc-build projects. (i.e. a "glue" project)

Commands

Running tasks over all projects in the build

Most of the time, you will be in an environment with more that one included build. If you want to run a Gradle task on all of them at once, use:

gradle compositeTask -PtaskName=someTaskName

For example, to run the Java plugin's compileJava task on your project plus all included Java projects, run:

gradle compositeTask -PtaskName=compileJava.

As always, pass any additional properties required for your task via additional -PsomeProperty=someValue.

To run multiple tasks over all builds you can separate them with commas. taskName and taskNames both work.

gradle compositeTask -PtaskNames=task1,task2,task3

Running a task on only a extra source set

You can run a task on an extra source set, like the test source set. In ihmc-build extra source sets are included as "multi projects". So you can use the : character to sepcify the extra source set project and the task to run, like:

gradle ihmc-java-toolkit-test:publish -PsomeProperty=someValue

Publishing releases

Set publishUsername and publishPassword in ~/.gradle/gradle.properties to your Sonatype JIRA credentials.

gradle publish -PpublishUrl=ihmcRelease

The above command publishes your-project-0.1.0.jar to Maven Central if the openSource option is set to "true" in the ihmc block. Otherwise, it will publish to Artifactory proprietary-releases.

Publishing locally

To publish your-project-LOCAL.jar to $home/.m2:

gradle publish -PpublishUrl=local

Publishing to custom repositories/URLs

Use the publishUrl property to pass the URL and publishUsername and publishPassword to authenticate:

gradle publish -PpublishUrl=https://my.site/repo -PpublishUsername=username -PpublishPassword=password

You can also code this in the build.gradle.kts to a keyword with the addPublishUrl() function:

build.gradle.kts:

ihmc {
   ...
   
   configureDependencyResolution()  // Between here ->
   addPublishUrl("myVendor", "https://my.site/my-repo", publishUsername, publishPassword)
   configurePublications() // <- and here
}

Publishing all projects at once

The compositePublish task is provided as an alias for gradle compositeTask -PtaskName=publish:

gradle compositePublish

For example, to publish a group of projects:

gradle compositePublish -PpublishUrl=ihmcRelease

Clean build directories

The clean task is extended to also clean bin/ and out/. clean normally only deletes build/.

A cleanBuildship task has been added to clean .settings.

A cleanIDE task has been added to group cleanEclipse, cleanIdea, and cleanBuildship.

The compositeClean task is provided as an alias for gradle compositeTask -PtaskName=clean.

The compositeCleanIDE task is provided as an alias for gradle compositeTask -PtaskNames=cleanEclipse,cleanIdea,cleanBuildship.

Maven Repositories

To add a Maven repository, use the repository function in the ihmc extension. Note that projects that depend on this will also need to have these repositories declared, so use them sparingly.

ihmc {
   ...

   configureDependencyResolution()  // Between here ->
   repository("http://maven-eclipse.github.io/maven")
   repository("https://artifactory.ihmc.us/artifactory/proprietary-releases/", artifactoryUsername, artifactoryPassword)
   configurePublications() // <- and here
}

Creating a new project

Create the following file structure:

your-project
├─ src/main/java
├─ src/test/java
├─ build.gradle.kts
├─ settings.gradle.kts
├─ gradle.properties
└─ ...

Fill out gradle.properties:

title = Your Project Title
extraSourceSets = ["test"]
compositeSearchHeight = 0
excludeFromCompositeBuild = false

Fill out build.gradle.kts:

plugins {
   id("us.ihmc.ihmc-build")
}

ihmc {
   group = "us.ihmc"
   version = "0.1.0"
   vcsUrl = "https://your.vcs/url"
   openSource = false
   maintainer = "Your Name"

   configureDependencyResolution()
   configurePublications()
}

mainDependencies {
   api("some:main-dependency:0.1")
}

testDependencies {
}

Copy the following into settings.gradle.kts:

pluginManagement {
   plugins {
      id("us.ihmc.ihmc-build") version "0.29.3"
   }
}

buildscript {
   repositories {
      maven { url = uri("https://plugins.gradle.org/m2/") }
      mavenLocal()
   }
   dependencies {
      classpath("us.ihmc:ihmc-build:0.29.3")
   }
}

val ihmcSettingsConfigurator = us.ihmc.build.IHMCSettingsConfigurator(settings, logger, extra)
ihmcSettingsConfigurator.checkRequiredPropertiesAreSet()
ihmcSettingsConfigurator.configureExtraSourceSets()
ihmcSettingsConfigurator.findAndIncludeCompositeBuilds()

Groups of projects

Handling groups of independently buildable projects is a core focus of this plugin. The repository-group project provides root level scripts so you can get started quickly and easily keep build scripts up to date with a periodic git pull. See the repository-group README for more details.

Consider the following layout:

repository-group
├─ single-project-one
│  └─ src/main/java
│  └─ build.gradle.kts
│  └─ gradle.properties
│  └─ settings.gradle.kts
├─ single-project-two
│  └─ src/main/java
│  └─ build.gradle.kts
│  └─ gradle.properties
│  └─ settings.gradle.kts
├─ multi-project-one
│  └─ subproject-one
│     └─ src/main/java
│     └─ build.gradle.kts
│     └─ gradle.properties
│     └─ settings.gradle.kts
│  └─ subproject-two
│     └─ src/main/java
│     └─ build.gradle.kts
│     └─ gradle.properties
│     └─ settings.gradle.kts
│  └─ build.gradle.kts
│  └─ gradle.properties
│  └─ settings.gradle.kts
├─ build.gradle.kts
├─ settings.gradle.kts
└─ gradle.properties

The Gradle build files for the projects that do not contain src/main/java directories have a few differences from the ones above:

gradle.properties for project group:

title = Your Project
isProjectGroup = true
compositeSearchHeight = 0
excludeFromCompositeBuild = false

build.gradle.kts for project group:

plugins {
   id("us.ihmc.ihmc-build")
}

settings.gradle.kts for project group:

pluginManagement {
   plugins {
      id("us.ihmc.ihmc-build") version "0.29.3"
   }
}

buildscript {
   repositories {
      maven { url = uri("https://plugins.gradle.org/m2/") }
      mavenLocal()
   }
   dependencies {
      classpath("us.ihmc:ihmc-build:0.29.3")
   }
}

val ihmcSettingsConfigurator = us.ihmc.build.IHMCSettingsConfigurator(settings, logger, extra)
ihmcSettingsConfigurator.configureAsGroupOfProjects()
ihmcSettingsConfigurator.findAndIncludeCompositeBuilds()

Troubleshooting

Group property requirement

The Gradle composite builds feature requires the group and version project properties to be set on all of the included projects. This is a common reason why a dependency build will not be included. See more at https://docs.gradle.org/current/userguide/composite_builds.html.

Gradle file trio requirement

The ihmc-build plugin requires all projects to have a build.gradle.kts, settings.gradle.kts, and gradle.properties file to qualify for build inclusion. This another common reason that projects don't make it into the build.

Learn more

Testing Without Publishing to the Gradle Plugins Site

Use gradle publishToMavenLocal and the in the depending project, use in the settings.gradle.kts:

pluginManagement {
   repositories {
      mavenLocal()
      gradlePluginPortal()
   }
}

Future plans

Get Kotlin build scripts working in IntelliJ and Eclipse.

Unfortunately, this project has hardcoded parameters specific to IHMC. making it hard for others to use. It's mostly open sourced for reference and ideas for other people. Feel free to fork it or copy code! In the next year, I would like to turn it into something easy to use for others. Furthermore, hopefully this project will shrink into non-existence as Gradle and Maven get better.