Package Coordinators: Marco Clemencic, Charles Leggett

Release Notes

The main reason for this major release is to the change of the Algorithm base class with a re-entrant execute method (#47, !703). For backward compatibility the base class for algorithms is Gaudi::Algorithm, while the name Algorithm in the top level namespace is used for a backward compatible implementation. This change also required a backward incompatible change in the IAlgorithm interface, so some code may require adaptation.

We also took the occasion to update the version of clang-format we use from 3.9 to 7, and to switch Python formatting from autopep8 to yapf (!788). Because of the differences (fixes and new features) in the versions of clang-format, we also updated the style rules.

As of this version, Gaudi requires C++17 compatible compiler. C++14 compatibility is not required in merge requests, nor guaranteed on the master branch.

On top of that, we have the usual collection of minor fixes and improvements.

Changed

• Use gcc 8 instead of gcc 7, and drop gcc 6.2 in CI jobs (!836)
• Make new counters work with Gaudi::Algorithm (#57, !834, !839)
• Update clang-format version and style rules (!788)
• Make DataObjectHandle::{put,getOrCreate} const (!833)
• Simplify IAlgExecStateSvc interface (!775)
• Simplify Algorithm constructor (!766)
• Improve the scheduler’s execution flow simulator and fix the intra-event occupancy logger (!819)
• Reentrant Algorithm base class (#47, !703)

Added

• Introduced CPUCrunchSvc (!840)
• Added a boolean parameter to turn on verbose view algorithm status (!835)
• Added MsgStream support for counters (!826)
• Message: Add option to print full event ID (!824)
• IoComponentMgr: Add interface to retrieve all filenames of component (!823)
• Add example for Consumer<void()> (!797)

Fixed

• Fix lookup/use of nosetests for LCG 95 (!842)
• Check coding conventions in build stage of Gitlab-CI (!848)
• Make gaudi_add_compile_test also work for succeeding compilations (!844)
• Fix build of Gaudi with LCG 95rc1 in ATLAS context (!847)
• Explicitly define StatusCode constants (!841)
• Fix handling of EventContext in Gaudi::Functional::Transformer arguments (!837)
• Extensions to allow EventIDRanges limited by both time-stamps and run/LB pairs (!831)
• Improve ROOT dictionary dependency computation (!825)
• Fix issues in preparation for LCG 95 (!820)
• Improve QMT test wrapper (!812)
• Improvements for tests (!812, !817)
• Fixes/workrounds for thread-safety (!815, !829)
• Code clean up (!808, !811, !814, !809, !827, !843)
• Fixes to thread local initialization (!816, !807)