Expose ACTS unit constants to python

As discussed in !47319 (merged), we want to make the ACTS unit constants available to the python configuration, and make sure they're in sync.

This MR adds a dictionary that is generated from the Acts/Definitions/Units.hpp file and a wrapper python module that wraps it to hide the struct trick needed to autoload the variables (this workaround is borrowed from xAODEgamma/EgammaParameters. I also added a test that checks the current units in the ACTS header are available in python, and that they are non-zero.

/cc @akraszna @fwinkl @cvarni

added ACTS Tracking labels

This merge request affects 1 package:

• Tracking/Acts/ActsInterop

This merge request affects 5 files:

• Tracking/Acts/ActsInterop/ActsInterop/ActsUnitDict.h
• Tracking/Acts/ActsInterop/ActsInterop/selection.xml
• Tracking/Acts/ActsInterop/CMakeLists.txt
• Tracking/Acts/ActsInterop/python/Units.py
• Tracking/Acts/ActsInterop/test/test_units.py

Adding @amorley ,@pagessin as watchers

added master review-pending-level-1 labels

I'm on board with these changes.

CI Result SUCCESS (hash f7503bd1)

	Athena	AthSimulation	AthGeneration	AnalysisBase	AthAnalysis	DetCommon
externals
cmake
make
required tests
optional tests

Full details available on this CI monitor view
Athena: number of compilation errors 0, warnings 3
AthSimulation: number of compilation errors 0, warnings 0
AthGeneration: number of compilation errors 0, warnings 0
AnalysisBase: number of compilation errors 0, warnings 0
AthAnalysis: number of compilation errors 0, warnings 0
DetCommon: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 40622]

For info @pagessin, this is the new warning message this MR is introducing

/var/lib/jenkins/workspace/CI-MERGE-REQUEST-CC7/master/Tracking/Acts/ActsInterop/test/test_units.py
Warning: Unused variable rule: ActsUnitConstants::*

Is there a way to avoid that?

mentioned in merge request !47319 (merged)

added 1 commit

• e3eb719e - fix unused variable warning, rename test

Compare with previous version

This merge request affects 1 package:

• Tracking/Acts/ActsInterop

This merge request affects 5 files:

• Tracking/Acts/ActsInterop/ActsInterop/ActsUnitDict.h
• Tracking/Acts/ActsInterop/ActsInterop/selection.xml
• Tracking/Acts/ActsInterop/CMakeLists.txt
• Tracking/Acts/ActsInterop/python/Units.py
• Tracking/Acts/ActsInterop/test/test_units.py

Adding @amorley ,@pagessin as watchers

added 1 commit

• f5f0bda2 - fix dictionary, lift variables, update usage guide

Compare with previous version

This merge request affects 1 package:

• Tracking/Acts/ActsInterop

This merge request affects 5 files:

• Tracking/Acts/ActsInterop/ActsInterop/ActsUnitDict.h
• Tracking/Acts/ActsInterop/ActsInterop/selection.xml
• Tracking/Acts/ActsInterop/CMakeLists.txt
• Tracking/Acts/ActsInterop/python/UnitConstants.py
• Tracking/Acts/ActsInterop/test/test_units.py

Adding @amorley ,@pagessin as watchers

CI Result SUCCESS (hash e3eb719e)

	Athena	AthSimulation	AthGeneration	AnalysisBase	AthAnalysis	DetCommon
externals
cmake
make
required tests
optional tests

Full details available on this CI monitor view
Athena: number of compilation errors 0, warnings 1
AthSimulation: number of compilation errors 0, warnings 0
AthGeneration: number of compilation errors 0, warnings 0
AnalysisBase: number of compilation errors 0, warnings 0
AthAnalysis: number of compilation errors 0, warnings 0
DetCommon: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 40667]

CI Result SUCCESS (hash f5f0bda2)

	Athena	AthSimulation	AthGeneration	AnalysisBase	AthAnalysis	DetCommon
externals
cmake
make
required tests
optional tests

Full details available on this CI monitor view
Athena: number of compilation errors 0, warnings 0
AthSimulation: number of compilation errors 0, warnings 0
AthGeneration: number of compilation errors 0, warnings 0
AnalysisBase: number of compilation errors 0, warnings 0
AthAnalysis: number of compilation errors 0, warnings 0
DetCommon: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 40672]

removed review-pending-level-1 label

added review-user-action-required label

added review-approved label and removed review-user-action-required label

resolved all threads

merged