CI Pipeline Configuration

Open & import the project

In your IDEA, File - Open, select .teamcity/pom.xml, import as project, and you'll have a Maven project.

Project structure

Mostly a standard Maven project structure. The entry point settings.kts defines the TeamCity project.

There are 3 subprojects in the TeamCity project hierarchy: Check for Gradle builds, Promotion for releasing Gradle versions, Util for miscellaneous utilities.

Develop and verify

After you make a change, you can run mvn clean teamcity-configs:generate to generate and verify the generated TeamCity configuration XMLs.

You also need to run mvn clean verify with Java 8 before committing changes.

If you have ktlint errors, you can automatically fix them by running mvn com.github.gantsign.maven:ktlint-maven-plugin:1.1.1:format.

How the configuration works

We use Kotlin portable DSL to store TeamCity configuration, which means you can easily create a new pipeline based on a specific branch. Currently, we have two pipelines: master and release, but you can easily create and test another isolated pipeline from any branch.

We'll explain everything via an example. Let's say you make some changes on your branch myTestBranch (we highly recommend to name this branch without prefix and hyphen (-) because it's used to generate build type ID) and want to test these changes without affecting master/release pipeline. Here are the instructions.

• Click the left sidebar "VCS Roots" here and create a VCS root here
  • Suppose the VCS root you just create is MyNewVcsRoot. Set "default branch" to myTestBranch where your code exists.
• Click Create subproject button at the bottom of the "Subprojects" region of this page
  • Select Manually.
  • Give it a name. The name will be displayed on TeamCity web UI. We highly recommend it be capitalized from the branch name, i.e. MyTestBranch.
  • The project ID will be auto-generated as Gradle_MyTestBranch. If not, you probably selected wrong parent, the "Parent project" should be Gradle.
• Now click on the new project you just created. The URL should be https://builds.gradle.org/admin/editProject.html?projectId=Gradle_<MyTestBranch>.
• Click Versioned Settings on the left sidebar.
  • Select Synchronization enabled - use settings from VCS - MyNewVcsRoot(the one you just created) - Settings format: Kotlin, then Apply.
• At the popup window, click Import Settings from VCS. Wait a few seconds.
  • If the error says "Context Parameter 'Branch' missing", it's ok. Click into the error and add a context parameter Branch with value myTestBranch. Go back and it automatically reloads.
  • If there are any errors, read the error and fix your code.
  • IMPORTANT NOTE: if the first import fails, you have to select and apply Synchronization disabled, then repeat the step above. Otherwise, TeamCity complains "Can't find the previous revision, please commit current settings first".
  • If anything bad happens, feel free to delete the project you created and retry (you may need to apply Synchronization disabled before deleting it).

If no errors, your new pipeline will be displayed on TeamCity web UI:

Gradle
|------ Master
|        |--------- ...
|
|------ Release
|        |--------- ...
|                
|------ MyTestBranch
        |---------- Check
        |           |--------- QuickFeedbackLinux
        |           |--------- QuickFeedback
        |           |--------- ...
        |           |--------- ReadyForRelease
        |
        |---------- Promotion
        |           |--------- Publish Nightly Snapshot
        |           |--------- Publish Branch Snapshot
        |           |--------- ...
        |
        |---------- Util
                    |--------- ...