LHCb: LHCb Tag Collector

The LHCb physics software consists of hundreds of packages, each of which is developed by one or more physicists. When the developers have some code changes that they would like released, they commit them to the version control system, and apply a tag. These changes have to be integrated into a new release of each of the physics analysis applications. The integration tests are done in a nightly build system that every night rebuilds various configurations of the whole software stack and does the tests. A Tag Collector system has been developed using solid standard technologies to cover both the use cases of developers and integration managers. A simple web interface, based on an AJAX-like technology, is available. Integration with software management and nightly build programs is possible via a Python API. Data are stored in a relational database with the help of an ORM (Object-Relational Mapping) library.