Stopping compile time execution

[Russel Winder]

I have a bit of code which is the definition of a class Preferences,
which has:

	this() {
		filePath = expandTilde(chainPath("~", ".config", "me-tv", "preferences.yml").array);

filePath is a member of the class. Now if I have a module level
instance (clearly not a good move but OK for now):

   public auto preferences = new Preferences;

then Dub using DMD on Debian Sid gives me:

/usr/include/dmd/phobos/std/path.d(3970,31): Error: getenv cannot be interpreted at compile time, because it has no available source code
/usr/include/dmd/phobos/std/path.d(4064,41):        called from here: expandFromEnvironment(inputPath)
source/preferences.d(36,25):        called from here: expandTilde(array(chainPath("~", ".config", "me-tv", "preferences.yml")))

What is the official way of getting preferences initialised at run time
and not compile time.

-- 
Russel.
===========================================
Dr Russel Winder      t: +44 20 7585 2200
41 Buckmaster Road    m: +44 7770 465 077
London SW11 1EN, UK   w: www.russel.org.uk
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