Implement getting binary path on OpenBSD

[SuperDisk]

What does this PR do?

This commit adds a mostly untested function to get the path to the running binary on OpenBSD.

https://stackoverflow.com/questions/31494901/how-to-get-the-executable-path-on-openbsd

Why was it initiated? Any relevant Issues?

I initiated the PR upon request from here: #662 (comment)

I'm sorry I can't really help out more, I just did this as a quick hack to get my own thing working so I'm sure it needs to be revised before merging.

PR Checklist

• Correct base branch selected? Should be develop branch.
• Enabled commit hook or executed ./bin/autoformat-nuitka-source.
• All tests still pass. Check the Developer Manual about Running the Tests. There are GitHub
  Actions tests that cover the most important things however, and you are welcome to rely on those,
  but they might not cover enough.
• Ideally new features or fixed regressions ought to be covered via new tests.
• Ideally new or changed features have documentation updates.

[sourcery-ai]

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[kayhayen]

So, I am able to force push into your repository there. I rebased to develop, and commented out with #if 0 what I think is a strip of the directory name that should make it wrong. Please compile with --standalone and report what happens. @SuperDisk

[kayhayen]

Make sure do git pull --rebase on your branch btw

[SuperDisk]

@kayhayen Is there a sample program I can compile to verify the output against what it's supposed to look like?

[kayhayen]

tests/standalone/CtypesUsing.py

[SuperDisk]

(building-nuitka-venv) nickfaro$ pwd
/home/npfaro/making-nuitka/Nuitka/CtypesUsing.dist
(building-nuitka-venv) nickfaro$ ./CtypesUsing.bin                                                             
(building-nuitka-venv) nickfaro$ 

It doesn't crash at least, is it supposed to do something?

[kayhayen]

Oh yes, it is only tested on Windows and Linux really, use tests/standalone/LxmlUsing.py with lxml installed of course then. Not crashing is very good though. :)

[SuperDisk]

Well I mean is there something that actually tests this binary-name-getting functionality?

[kayhayen]

Standalone does have to use it at program launch I think, cannot work without it, I believe. But you can always just print(__file__) and compile that.

[kayhayen]

Did you have a chance to try printing file ?

[SuperDisk]

Looks like it works:

(building-nuitka-venv) nickfaro$ ./hi.bin
/home/npfaro/making-nuitka/hi.py

[kayhayen]

Ok, I will give a final brush up then and merge it to factory. i will keep you posted, when you should try it.

[kayhayen]

Can you try the current factory branch: You can try it out by going here: https://nuitka.net/doc/factory.html

[SuperDisk]

I'm currently getting this:

(building-nuitka-venv) nickfaro$ more hi.py                                                                            
print(__file__)
(building-nuitka-venv) nickfaro$ rm hi.bin                                                                             
(building-nuitka-venv) nickfaro$ python3 -m nuitka hi.py
Nuitka-Options: Used command line options: hi.py
Nuitka-Options:WARNING: You did not specify to follow or include anything but main program. Check options and make sure
Nuitka-Options:WARNING: that is intended.
Nuitka-Options: Detected static libpython to exist, consider '--static-libpython=yes' for better performance, but errors
Nuitka-Options: may happen.
Nuitka: Starting Python compilation with Nuitka '2.3rc5' on Python '3.10' commercial grade 'not installed'.
Nuitka: Completed Python level compilation and optimization.
Nuitka: Generating source code for C backend compiler.
Nuitka: Running data composer tool for optimal constant value handling.
Nuitka: Running C compilation via Scons.
Nuitka-Scons: Backend C compiler: clang (clang 16.0.6).
In file included from static_src/CompiledFunctionType.c:3121:
In file included from /home/npfaro/making-nuitka/building-nuitka-venv/lib/python3.10/site-packages/Nuitka-2.3rc5-py3.10.egg/nuitka/build/static_src/CompiledCodeHelpers.c:56:
/home/npfaro/making-nuitka/building-nuitka-venv/lib/python3.10/site-packages/Nuitka-2.3rc5-py3.10.egg/nuitka/build/static_src/HelpersFilesystemPaths.c:80:17: error: use of undeclared identifier 'ok'
                ok = 1;                        
                ^                              
1 error generated.                             
Nuitka-Scons: Backend linking program with 7 files (no progress information available for this stage).
scons: *** [static_src/CompiledFunctionType.o] Error 1
FATAL: Failed unexpectedly in Scons C backend compilation.
Nuitka:WARNING:     Complex topic! More information can be found at
Nuitka:WARNING: https://nuitka.net/info/scons-backend-failure.html
Nuitka-Reports: Compilation crash report written to file 'nuitka-crash-report.xml'.

[kayhayen]

Ok, please retry, my bad.

[SuperDisk]

@kayhayen It's working for me :)

[kayhayen]

Great, adding OpenBSD to the list of supported OSes. :)

[kayhayen]

This will be in the 2.3 release shortly

[kayhayen]

def hasOnefileSupportedOS():
    return getOS() in ("Linux", "Windows", "Darwin", "FreeBSD")


def hasStandaloneSupportedOS():
    return getOS() in ("Linux", "Windows", "Darwin", "FreeBSD", "OpenBSD")

Can you check if onefile works for you if you extend the list, I wouldn't know why not.