Defining and Using Build Parameters in Build Configuration
To learn about build parameters in TeamCity, refer to the Configuring Build Parameters page. In this section:
Defining Build Parameters in Build Configuration
On the Parameters page of Build Configuration settings you can define the required system properties and environment variables to be passed to the build script and environment when a build is started. Note, that you can redefine them when launching a Custom Build.
Build Parameters defined in a Build Configuration are used only within this configuration. For other ways, refer to Project and Agent Level Build Parameters.
Any user-defined build parameter (system property or environment variable) can reference other parameters by using the following format:
Using Build Parameters in Build Configuration Settings
In most Build Configuration settings you can use a reference to a Build Parameter instead of using the actual value. Before starting a build, TeamCity resolves all references with the available parameters. If there are references that cannot be resolved, they are left as is and a warning will appear in the build log.
To make a reference to a build parameter, use its name enclosed in percentage signs, e.g.: %\teamcity.build.number%
Any text appearing between percentage signs is considered a reference to a property by TeamCity. If the property cannot be found in the build configuration, the reference becomes an implicit
agent requirement
and such build configuration can only be run on an agent with the property defined. The agent-defined value will be used in the build.
If you want to prevent TeamCity from treating the text in the percentage signs as reference to a property, use two percentage signs. Every occurrence of "%%" in the values where property references are supported will be replaced to "%" before passing the value to the build. e.g. if you want to pass "%\Y%m%\d%H%\M%S
" into the build, change it to "%\%Y%\%m%\%d%\%H%\%M%\%S
"
Where References Can Be Used
Group of settings | References notes |
---|---|
Build Runner settings, artifact specification | any of the properties that are passed into the build |
User-defined properties and Environment variables | any of the properties that are passed into the build |
Build Number format | |
VCS root and checkout rules settings | any of the properties that are passed into the build |
VCS label pattern |
|
Artifact dependency settings |
If you reference a build parameter in a build configuration, and it is not defined there, it becomes an agent requirement for the configuration. The build configuration will be run only on agents that have this property defined.
Password fields can also contain references to parameters, though in this case you cannot see the reference as it is masked as any password value.
Using Build Parameters in VCS Labeling Pattern and Build Number
In Build number pattern and VCS labeling pattern, you can use %[env|system].property_name%
syntax to reference the properties that are known on the server-side. These are server and reference predefined properties and properties defined in the settings of the build configuration on the Parameters page. For example, VCS revision number: %\build.vcs.number%
.
Using Build Parameters in the Build Scripts
All build parameters starting with "env." prefix (environment variables) are passed into the build's process environment (omitting the prefix).
All build parameters starting with "system." prefix (system properties) are passed to the supported build script engines and can be referenced there just by the property name (without "system." prefix):
For MSBuild (Visual Studio 2005/2008 Project Files) use
$(<property name>)
. Note that MSBuild does not support names with dots ("."), so you need to replace "." with "_" when using the property inside a build script.For Gradle: Since TeamCity 9.1.5, the TeamCity system properties can be accessed as Gradle properties (similar to the ones defined in the
gradle.properties
file) and are to be referenced as follows: a) name allowed as Groovy identifier (the property name does not contain dots):println "Custom user property value is ${customUserProperty}"b) name not allowed as Groovy identifier (the property name contains dots, e.g.
build.vcs.number.1
):project.ext["build.vcs.number.1"]
When TeamCity starts a build process, the following precedence of the build parameters is used (those on top have higher priority):
parameters from the Project and Agent Level Build Parameters file.
pre-defined parameters.
parameters defined in the Run Custom Build dialog.
parameters defined in the Build Configuration.
parameters defined in the Project (the parameters defined for a project will be inherited by all its subprojects and build configurations. If required, you can redefine them in a build configuration).
parameters defined in a template (if any).
parameters defined in the agent's
buildAgent.properties
file.environment variables of the Build Agent process itself.
The resultant set of parameters is also saved into a file which can be accessed by the build script. See teamcity.build.properties.file
system property or TEAMCITY_BUILD_PROPERTIES_FILE
environment variable description in Predefined Build Parameters for details.