Calling Environment Variables

[Bernard Rouhi]

Hi,

I'm trying to load external environment variables with QML or JavaScript, but I can find any function to do that.

what I do normally is to clarify the variable in command line like so:

set MY_PATH="C:/ProjectA"

and if I lunch the python in same command line I can call the variable like so:

>>> import os
>>> print os.environ.get("MY_PATH")
C:/ProjectA

but now I'm trying to do the same thing in Substance Painter and they only support QML and JavaScript but not C++.
Is there any way that I can call the OS environment variables in JS or QML?

[ambershark]

@Bernard-Rouhi I would get the environment variable on the c++ side and pass it to qml.

Unfortunately if you are on client-side java script there is no way to access environment variables. Which is probably a good thing for the massive security problems that would create. :)

[Bernard Rouhi]

@ambershark Thank you for the reply, I agree with you, but Substance Painter doesn't support C++, according to their documentation, "The plugin are wrote in Javascript and can be combined with the QML language to create custom interface inside the application." Link.

Is there anyway that I can execute Command line or python file from JS/QML and get the return value?

[ambershark]

@Bernard-Rouhi I don't think so. That would have the same security problems. I'm no expert in qml or js but I don't think you can do that.

Node.js supports getting environment variables but that is a different beast altogether.

[Bernard Rouhi]

@ambershark thanks for the reply again, I have noticed that the Substance Painter doesn't compile my QML and JavaScript, and that would be the reason I couldn't link C++ to my QML plugin.

However, I found that there is a workaround, I can run Substance Painter 2.exe on command line along multiple variables and then call them by using application.arguments

Example:
in the command line I go into Substance Painter 2 directory and type:

"Substance Painter 2.exe" C:/ProjectA

and in my QML plugin I use:

Qt.application.arguments

and it will return:

{
  "0": "Substance Painter 2.exe",
  "1": "ProjectA"
}

This is not a very smart way, but at least lead to some result.

I'm wondering if there is any way that I can write what I need in C++ and compile it with Qt Creative and add it to the Substance Painter's QML library, but I'm not sure if it's a good idea.