D - Python virtual environment launcher on linux.

import std.path;
import std.stdio;
import std.process;

// Launcher. Python virtual environment programs launcher on linux.
void main(string[] args)
{
    if (args.length > 1)
    {
        string program = args[1];
        auto ext = extension(program);
        if (ext != ".py")
        {
            if (ext.length == 0)
            {
                program ~= ".py";
            }
            else
            {
                writeln("Looking for python file extension");
                return;
            }
        }

        auto homedir = environment.get("HOME");
        //writeln(homedir, " -- ", homedir.expandTilde);
        auto pid = spawnProcess([homedir ~ "/env/bin/python", program]);
        auto exitCode = wait(pid);
    }
    else
    {
        writeln("Missing python file name");
    }
}