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.
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Build configuration templates support project hierarchy: you can use the templates 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. Now you can associate a build configuration to a template only if the template belongs to the current project or one of its parents.
If you upgraded from versions earlier than TeamCity 8.0, your configurations from one project might be associated with templates from an unrelated project. After upgrading to TeamCity 8+, such templates can become inaccessible in out-of-order projects during the settings editing or new build configuration creation. To reuse build configuration templates from an unrelated project, it is recommended to manually move the templates into the common parent project (or the Root project if you want them to be globally available).
When you associate an existing build configuration with a template, the build configuration inherits all the settings defined in the template, and if there's 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.
When you detach a build configuration from a template using the Detach from template option available from the Actions button at top right corner of the build configuration settings screen, all settings from the template will be copied to the build configuration and enabled for editing.
Although a build configuration associated with a template inherits all its settings (marked as inherited in the UI), it is still possible to redefine a number settings in an associated build configuration. Modifying settings in the template will influence all configurations associated with this template.
Inherited settings cannot be deleted from an associated build configuration.
The following settings can be overridden in a build configuration inherited from a template:
Note that if you rename an inherited parameter or an agent requirement in a build configuration, this parameter/ agent requirement is actually disconnected from the template and is treated as a new parameter created in the build configuration. For example, if you rename a parameter in an associated build configuration, and then rename the same parameter in the template, you will end up with two parameters in the build configuration: the new one inherited from the template, and the old one which was redefined in the build configuration.
Besides, you can redefine settings configured via parameter references or add new items to lists.
Text field settings
When you specify some fixed value in a text field of a template, it is inherited as is and cannot be changed in an associated build configuration.
However, in most of the text fields of your template settings (except names (build configuration, parameter, build step), descriptions, agent requirements, typed parameters definitions), you can use a reference to a build parameter instead of the actual value. Thus you can define the actual value of this parameter in each particular associated build configuration separately.
See below for an example of configuration parameters usage.
Other settings: drop-downs, lists, check boxes, password fields, etc.
These settings are inherited from a template as is and cannot be redefined in an associated build configuration.
A collection of settings, such as parameters, build steps, VCS roots, or build triggers can be extended in an inherited configuration.
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.
To introduce a configuration parameter reference, use the
%ParameterName% syntax in the template text field. Once introduced, this parameter appears on the Parameters page of the build configuration template marked as requiring a value.
You can either specify the parameter's default value or leave it without any value. You can then define the actual value for the parameter in a build configuration associated with the template.
See also Configuring Build Parameters and Defining and Using Build Parameters in Build Configuration#Using Build Parameters in Build Configuration Settings.
Assume that you have two similar build configurations that differ only by checkout rules. For instance, checkout rules for the first configuration should contain
'+:release_1_0 => .', and for the second
'+:trunk => .'. All other settings are equal. It would be useful to have one template to associate with both build configurations, but this means changing the checkout rules in each build configuration separately.
To do so, perform the following steps:
checkout.rulesparameter right in the "Associate with Template" dialog. Click "Associate".
As a result, you'll have two build configurations with different checkout rules, but associated with one template.
This way you can create a configuration parameter and then reference it from any build configuration, which has a text field.