Nuitka: Command line option --python-flag=static_hashes doesn't work

[brendanator]

• Nuitka version, full Python version and Platform (Windows, OSX, Linux ...)

  0.6.7
  Python: 3.7.4 (v3.7.4:e09359112e, Jul  8 2019, 14:54:52) 
  OS: Darwin
  Arch: x86_64
  

• How did you install Nuitka and Python (pip, anaconda, deb, rpm, from source,
  what is a virtualenv ...), this is very important usually.

  pip
  

• If possible please supply a Short, Self Contained, Correct, Example
  that demonstrates the issue i.e a small piece of code which reproduces
  the issue and can be run with out any other (or as few as possible)
  external dependencies.

  $ cat main.py
  print(hash('hello'))
  $ python -m nuitka main.py --standalone --python-flag=use_hash_seed
  $ ./main.dist/main
  -9128780370465225756
  $ ./main.dist/main
  -800855256429713425
  

  These hash values should be the same. Setting PYTHONHASHSEED works:

  $ PYTHONHASHSEED=1 ./main.dist/main
  4134408098142180803
  $ PYTHONHASHSEED=1 ./main.dist/main
  4134408098142180803
  

[kayhayen]

Hello there,

seems this was falsely coded at the time, using another flag to control it. I am fixing it right now, but it will be a while until this can leave factory, as there must be minor version checks for the flag to even exist yet. I recall it was added in the middle of things.

Yours,
Kay

[kayhayen]

For Python2, setting the flag value does things after calling _PyRandom_Init only, for Python3 that flag seemingly has become write only, and a very complex mechanism appears to be used for init instead, using a data structure that is not easy to obtain and compose.

[kayhayen]

On factory there is a solution for this for non-Windows platforms:

https://nuitka.net/doc/factory.html

The handling of Environment variables needs abstraction. The way it turns out to be required is to mess with PYTHONHASHSEED during the initialization. So Nuitka now as a benefit also produces compiled binary which ignore this value with the option set, and still keep the environment variable for child processes to use.

[brendanator]

Can confirm this works on mac. Thanks!

Will wait to close until you've solved Windows

[kayhayen]

This is now on develop, and going to be part of the next release. Works on Windows too.

[kayhayen]

The release 0.6.8 was just made and contains the correction.