std.process.system and friends

[HeiHon]

On Sunday, 3 February 2013 at 19:05:01 UTC, Peter Sommerfeld 
wrote:
> Do you know a way to set it via system/shell calls, notably 
> under windows?
>
> Peter
You might want to use Tango:

module env;
// 2013-01-08
// dmd2.061 + Siegelord Tango-D2-d2port

import tango.sys.Environment;
import tango.io.Stdout;

void main(string[] args)
{
     string VAR = "TESTENVVAR";
     string VAL1 = "VAL1";
     string VAL2 = "VAL2";

     assert(Environment.get(VAR) is null);

     Environment.set(VAR, VAL1);
     assert(Environment.get(VAR) == VAL1);

     Environment.set(VAR, "");
     assert(Environment.get(VAR) is null);

     Environment.set(VAR, VAL2);
     assert(Environment.get(VAR) == VAL2);

     Environment.set(VAR, null);
     assert(Environment.get(VAR) is null);

     Environment.set(VAR, VAL1);

     foreach (key, value; Environment.get)
         Stdout.formatln("'{}' = '{}'", key, value);

     foreach(i, arg; args)
     {
         auto p = Environment.exePath (cast (char[]) arg);
         Stdout.formatln("exePath(arg[{}] '{}') = '{}'", i, arg, 
p);
     }
}