How to select the build to copy artifacts from, such as latest successful or stable build, or latest "keep forever" build. Other plugins may provide additional selections.
The build number of the selected build will be recorded in the environment for later build steps to reference. The name of the environment variable is COPYARTIFACT_BUILD_NUMBER_ with the source project name appended (in all uppercase, and sequences of characters other than A-Z replaced by a single underscore).

Example:

• The build number of the build for the source project Project-ABC is available in COPYARTIFACT_BUILD_NUMBER_PROJECT_ABC
• The build number of the build for the source project tool1-release1.2 is available in COPYARTIFACT_BUILD_NUMBER_TOOL_RELEASE_