Add hepmcmerger

[kkauder]

Briefly, what does this PR introduce?

Add a package for https://github.com/eic/HEPMC_Merger

What kind of change does this PR introduce?

• Bug fix (issue #__)
• [*] New feature (issue #__)
• Documentation update
• Other: __

Please check if this PR fulfills the following:

• Tests for the changes have been added
• Documentation has been added / updated
• Changes have been communicated to collaborators

Does this PR introduce breaking changes? What changes might users need to make to their code?

No

Does this PR change default behavior?

No

[wdconinc]

Did you test that this actually works? Maybe you didn't submit all changes to this PR since you define cmake_args without defining this package as a CMakePackage.

[kkauder]

I couldn't test it, can you tell me how? This is something assembed from looking at existing packages but I'm flying blind

[wdconinc]

I couldn't test it, can you tell me how? This is something assembed from looking at existing packages but I'm flying blind

You can do something like:

docker run --rm -it spack/ubuntu-noble:0.21.0
git clone https://github.com/eic/eic-spack
git -C eic-spack checkout <branch>
spack repo add eic-spack
spack install <pkg>

(This could have typos, on my phone.)

[kkauder]

After chewing on this command for three hours, it just failed with the unrelated

 >> 9686    FAILED: tools/clang/lib/ASTMatchers/Dynamic/CMakeFiles/obj.clangDynamicASTMatchers.dir/Re
             gistry.cpp.o
     9687    /opt/spack/lib/spack/env/gcc/g++ -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_M

Is there anything else I can do?

[wdconinc]

Is there anything else I can do?

Not in this PR, apparently. Can you copy the full error message (with more than 'FAILED') and file it on spack?

[wdconinc]

Is there anything else I can do?

Not in this PR, apparently. Can you copy the full error message (with more than 'FAILED') and file it on spack?

And tag me in the issue on spack.

[kkauder]

I undid the f-string. It didn't work and this syntax is literally the same throughout the repo according to grep -r DCMAKE_CXX_STANDARD

[wdconinc]

Use single quotes inside the f-string arguments.

[wdconinc]

See last two examples in https://peps.python.org/pep-0498/#escape-sequences for correct f-string syntax.

[kkauder]

Thanks for all the help, @wdconinc ! Is the fact that the checks pass good enough to try including it in eic-shell?

[wdconinc]

Not at all. The checks don't do anything ;-)