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To learn about build parameters in TeamCity, please refer to the Configuring Build Parameters page.
On the Build Parameters page of Build Configuration settings you can define 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 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:
In most Build Configuration settings you can use a reference to a Build Parameter instead of using actual value. Before starting a build, TeamCity resolves all references with 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:
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. Agent-defined value will be used in the build.
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.
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 Build Parameters page.
Any system property (system.<property name>) can be referenced in a build script by the property name:
To get the file names that store the full set of properties, use can use teamcity.build.properties.file system property of TEAMCITY_BUILD_PROPERTIES_FILE environment variable. see Predefined Build Parameters#Agent Build Properties for details.