Build Configuration Template

Overview

Build configuration templates allow you to eliminate duplication of build configuration settings. If you want to have several similar (not necessarily identical) build configurations and be able to modify their common settings in one place without having to edit each configuration, create a build configuration template with those settings. Modifying template settings affects all build configurations associated with this template.

It is possible to define a default template in a project for all build configurations in this project and its subprojects. The section below contains details.

Build configuration templates support project hierarchy: once created, available templates include the ones from the current project and its parents. On copying a project or a build configuration, the templates that do not belong to the target project or one of its parents are automatically copied. You can associate a build configuration with a template only if the template belongs to the current project or one of its parents.

Creating build configuration template

There are several ways to create a build configuration template:

• Manually, like a regular build configuration.

• Extract from an existing build configuration: there is the Extract template option available from the Actions button at the upper right corner of the screen. Note that if you extract a template from a build configuration, the original configuration automatically becomes associated with the newly created template.

Defining default template for project

Default templates allow affecting all build configurations in this project and its subprojects.

You can associate all the build configurations of the project with a default template using the General Settings page of the project administration, by selecting a template from the Default template drop-down menu. The option is available if at least one template is defined in the project or its parent. All new build configurations will inherit the default template settings.

The settings of the existing configurations will be preserved.

When defined, the default template affects all build configurations and subprojects of this project unless other default templates are defined in subprojects. With default templates, you can easily modify all project's build configurations, for example:

• add a specific build feature to all build configurations of a project

• switch all build configurations to some specific checkout mode

• provide a default failure condition

object Project : Project({
    uuid = "2b241ffb-9019-4e60-9a3a-d5475ab1f312"
    extId = "ExampleProject"
    parentId = "_Root"
    name = "Example Project"
    defaultTemplate = "ExampleProject_MyDefaultTemplate"
    ...
    features {
        ...
    }
    ...
})

Associating build configurations with templates

• You can create new build configurations based on a template.

• You can associate/attach any number of existing build configurations with/to a template: there is the Attach to template option available from the Actions button in the upper right corner of the screen.

When you associate an existing build configuration with a template, the build configuration inherits all the settings defined in the template, and if there is a conflict, the template settings supersede the settings of the build configuration (except dependencies, parameters, and requirements). The settings inherited from a template can be overridden.

You can associate a build configuration to a template only if the template belongs to the current project or one of its parents. A template which has at least one associated build configuration cannot be deleted, the associated build configurations need to be detached first.

It is also possible to associate a build configuration with multiple templates.

<inherits>
<ref id="Template1_ExternalId" />
<ref id="Template2_ExternalId />
.....
</inherits>

Detaching build configurations from template

When you detach a build configuration from a template using the Detach from template option available in the Actions menu of the Build Configuration Settings page, all settings from the template will be copied to the build configuration and enabled for editing.
Note that if a build configuration is attached to multiple templates, the Detach from template option becomes unavailable – use Manage templates instead.

Redefining settings inherited from template

A build configuration associated with a template inherits all its settings (marked as inherited in the UI). Inherited settings cannot be deleted from an associated build configuration, but the inherited build steps, triggers, build features, failure conditions, artifact dependencies, and agent requirements can be disabled in it.

Modifying settings in the template will influence all configurations associated with this template; however, it is possible to redefine most settings in an associated build configuration.

You can redefine almost all the build configuration settings (for example, build steps, parameters, build options ). The only exceptions are snapshot dependencies and checkout rules which cannot be redefined.

Modified settings are highlighted with a yellow border, and the Reset button appears on the right of the modified settings enabling you to revert the changes to the original settings of the template.

Note that if you redefine an inherited parameter in a build configuration, it will be saved with the inherited name and the new value. If you then rename this parameter in the template, you will end up with two parameters in the build configuration: the one with the original name and the redefined value, and the renamed one inherited from the template.

Ability to have pre- and post-steps in a template

There is sometimes a need to define a common build step in a template, so that this step will be executed either before all build configuration steps or after them.
For a given template, it is possible to define such steps and then define their placement in respect to the build configuration steps. All build configuration steps are represented as a placeholder in the Reorder Build Steps dialog. The template steps can be placed before and/or after this placeholder.

You can still customize the order of build steps in a template-based build configuration if necessary:

• Using the TeamCity web UI, it is possible to change the placement of the build configuration steps in respect to the template steps.

• Using versioned settings, it is possible to change not only the placement of the build configuration steps in respect to the template steps, but also to reorder the steps of the template itself.

Enforcing settings inherited from template

If you want to enforce some settings on all the build configurations in the project so that other users could not redefine them, TeamCity provides this ability for all of the build configurations in a project hierarchy. For instance, using enforced settings it is possible to set agent side checkout everywhere, or ensure that all build configurations have some strict execution timeout. Currently, it is possible to enforce build features, options, and parameters. Build steps and build requirements can also be enforced.

To enforce some settings in the project hierarchy, create a template with these settings. After that, a system administrator can set this template as the enforced settings template in the project:

The enforced settings template is similar to the default template as all of its settings are inherited in build configurations of the project hierarchy. The difference is that these inherited settings cannot be disabled or overridden.

The system administrator role is required to associate a project with a specific enforced settings template. The template itself can be edited by a project administrator who can administer the project where the template is defined.

If the enforced settings template is specified in a project and a different template is assigned as the enforced settings in a subproject, the template of the subproject will have a higher priority.