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h1. Situation
ComponentA and productA build independently as different projects. During build process of ProductA, componentA will be checked for changes: if there are new changes in componentA, a new componentA version will be generated, and the new build result will be used to construct productA; otherwise, build result of latest version of componentA will be used instead.

h1. Demonstration
# To simulate new changes in componentA, _build condition_ of the [demo componentA configuration|] is set to _always build_ so that a new componentA version will be generated whenever it is triggered.
# Visit [latest build of productA|]. Hover mouse over the dependencies link in the build summary section, and you will see that current build of productA depends on most recent version of componentA.
# Click the run button to build productA. A new version will be generated in [componentA|] besides the new version in [productA|]. When new build of productA finishes, examine its dependency again, and it is now dependent on the newly generated version of componentA.

h1. Resolution
# Visit [repository setting of productA|]. There are two repositories defined: _component-a_ and _product-a_. Repository _product-a_ is used to retrieve source code of productA from SCM, while repository _component-a_ is used to retrieve build result of componentA. Repository _component-a_ is defined to retrieve all published jars from componentA, with the build defined as _latest build (generate new if necessary)_.
# Visit [step setting of productA|]. Two checkout steps are defined to checkout repository _product-a_ and _component-a_ respectively.