Package Coordinators: Marco Clemencic, Charles Leggett, Stefan Roiser

Release Notes

This major release of Gaudi contains additions, improvements and fixes, but most of all it adds the agreed on copyright statement and license:

© 1998-2019 CERN for the benefit of the LHCb and ATLAS collaborations, Apache version 2 license

Among the new features I’d like to highlight:

• new Python Configurables implementation (gaudi/Gaudi!721)
• experimental Gaudi::Accumulators::Histogram<...> (gaudi/Gaudi!1020)
• StatusCode::{andThen|orElse|orThrow} chaining functions (gaudi/Gaudi!988)

Changed

• Enable sse 4.2 by default for clang >= 6.0 (gaudi/Gaudi!1019)
• Use gcc9 in Gilab-CI builds (gaudi/Gaudi!1013)
• Remove begin/endRun methods (gaudi/Gaudi!1008)
• Make HistogramPersistencySvc a little quieter (gaudi/Gaudi!992)
• Reorganization of Counters headers (gaudi/Gaudi!1006)
• Add new StatusCode category to return filter passed states from functional algorithms (gaudi/Gaudi!981)
• Use xenv 1.0.0 if not available from the system (gaudi/Gaudi!984)
• Remove const-incorrect ToolHandles exception for ATLAS (gaudi/Gaudi!978)

Added

• Set Gaudi copyright and license (gaudi/Gaudi!1018)
• Add experimental support for histograms as counters (gaudi/Gaudi!1020)
• Add detection of strongly connected components in the data flow precedence rules (gaudi/Gaudi!998)
• Debug output for a stall expecting conditions data (gaudi/Gaudi!994)
• Add PRG validators for detection of unconditional “editing” of data objects (gaudi/Gaudi!980)
• Prototype for a renewed Python Configurables implementation (gaudi/Gaudi!721)
• Add helpers to chain StatusCode dependent executions (gaudi/Gaudi!988)
• Update THistSvc to support TEfficiency (gaudi/Gaudi!1011)
• Support bulk increment of BinomialAccumulator (gaudi/Gaudi!999)

Fixed

• genconf: fix quoting of strings containing quotes (gaudi/Gaudi!1023)
• Ignore unicode decode errors in test stdout (gaudi/Gaudi!1021)
• Do not use xenv from LCG (gaudi/Gaudi!1005)
• Properly escape strings with embedded quotes in Gaudi::Utils::toStream (gaudi/Gaudi!1012)
• Detect ROOT C++ standard from ROOTConfig.cmake (gaudi/Gaudi!985)
• Adjust clang warning suppression pragmas in Transformer.h (gaudi/Gaudi!1014)
• Improve scheduler performance with fewer calls to updateState (gaudi/Gaudi!870)
• Gaudi::Functional: Add possibility to query input/output location by type (gaudi/Gaudi!1009, gaudi/Gaudi!1015)
• Enable Gaudi::Functional::Transformer<Result(const EventContext&)> (gaudi/Gaudi!1007)
• More precise message for multiple algorithms having the same output in HiveDataBroker (gaudi/Gaudi!1003)
• Add flag to turn on/off use of std::filesystem (gaudi/Gaudi!987)
• IoComponentMgr: Only release components during finalize (gaudi/Gaudi!1004)
• Allow calling f(std::string_view) with a Gaudi::Property<std::string> (gaudi/Gaudi!1002)
• Specify file encoding when reading (gaudi/Gaudi!1000)
• Suppress printout of unused MsgCounter instances (gaudi/Gaudi!996)
• Do not print SequencerTimerTool header in finalize if there are no timing results (gaudi/Gaudi!997)
• Support for latest TBB and fixes for C++GSL and Range-v3 (gaudi/Gaudi!982)
• Fixes for “defects” detected by Coverity (gaudi/Gaudi!939)