k4MarlinWrapper

k4MarlinWrapper runs Marlin processors as Gaudi algorithms. It provides the necessary converters and interfaces between the file types and formats used between both frameworks:

• Python interface to configure Marlin processors
• In-memory Event Data Model (EDM) converters between LCIO and EDM4hep
• Steering file input conversion from Marlin (XML) to Gaudi (Python)
• Input and output file support for LCIO and EDM4hep

Build status

Using Event Data Model (EDM) converters

Please refer to the EDM Converters documentation

Configuring, compiling and installing

Use the CVMFS HSF Key4hep view to compile and install k4MarlinWrapper.

source /cvmfs/sw.hsf.org/key4hep/setup.sh
# Alternatively use the nightly build to get the latest development branches of key4hep packages
# source /cvmfs/sw-nightlies.hsf.org/key4hep/setup.sh

git clone https://github.com/key4hep/k4MarlinWrapper.git
cd k4MarlinWrapper

mkdir build install; cd build

cmake ..

cmake -DCMAKE_INSTALL_PREFIX=../install ..
make -j 4
make install

Running

k4MarlinWrapper processors run with LCIO and EDM4hep input.

• As an example for LCIO, copy the muons.slcio from the DD4hep file located in the DDTest/inputFiles/ directory to test/inputFiles/ directory in k4MarlinWrapper

To copy the file and run:

mkdir ../test/inputFiles
cp /path/to/muons.slcio ../test/inputFiles/muons.slcio
k4run ../k4MarlinWrapper/examples/runit.py

Format

To keep source code style consistent a .clang-format configuration is included. A CI test will check for compliance with this format on Pull Requests. To apply Clang format to all source and header files, please use your editor's or IDE's built-in integration, or directly from the command line. For example:

find . -regex '.*\.\(cpp\|h\)' -exec clang-format -style=file -i {} \;

Testing and examples

Several tests are provided. These serve as examples on how to use different features of k4MarlinWrapper.

Refer to the test/gaudi_opts directory to find steering files covering different use cases.

# Display available tests
ctest -N
# Run all tests
ctest
# Run specific test with verbose output
ctest --verbose -R test_clicReconstruction

Using Event Data Model (EDM) converters

Please refer to this doc on how to convert between EDMs in k4MarlinWrapper

Running in parallel: multi-thread support

Please refer to this doc on how to run with multi-thread support, and which options are supported.