Invoke conversion script from the game binary

[TheJJ]

The openage.convert script should be invoked by the game.

The game launches its own Python interpreter to perform the conversion.
The input path could be queried interactively someday,
the output path equals the userassets directory which will be ~/.openage/ later.

• Create openage --convert invokation
• Load python interpreter in the game (cpp/python.cpp)
• Modify sys.path
• AGE2DIR equals the argument to --convert
• Invoke openage.convert.__main__.main()

[Qquanwei]

I agree,but now I can't find this file openage.convert >_<

[TheJJ]

The script is currently called by make media, which invokes the script located in py/openage/convert/__main__.py. The script is available as

import openage.convert

that's where the name comes from 😉

[franciscod]

how should the game decide if it's necessary? how we deal with the game NOT reconverting everything on each run? should we have a sentinel file, like assets/is_converted?

[zuntrax]

I'm not sure what's the best way to do it now, but when we have nyan, we might just check if the main nyan file exists.

[TheJJ]

This will be done by #217.

[goto-bus-stop]

This is finished, isn't it? /cc @TheJJ

[TheJJ]

Yea, it is :) Thx4hint.