babymaker

This script generates a C++ file that can be compiled to postprocess ntuples.

Usage

babymaker -i <yaml_file> -n <main_ntuple> -f [<friend_ntuple1> ...] -o <output_cpp> -t <template_file> -V "<var:name>"

Note that:

• <yaml_file> contains the instruction for postprocessing.
• <main_file> main ntuples to be processed.
• <friend_ntuple1> friend ntuples get their trees add as friends to the main if the tree names are the same
• <template_file> refers to the input C++ template with embedded template macros.
• <var:name> additional literal variables

By default, babymaker tries to reformat the generated C++ file with clang-format, if it’s available in user’s $PATH. This can be disabled by providing the --no-format flag.

Compile Generated .cpp

To compile generated .cpp files, create a gen folder in project root, then copy the file, say test.cpp to gen. After that, type in:

make gen/test

Now the executable test will be compiled and placed inside gen.

To learn more about the compilation rules, please take a look at samples/sample.mk.

The rules defined in the file above can be copied to your project’s Makefile for pyBabyMaker integration.