The manual for the 'graphics' LaTeX bundle includes instructions for setting up the right conditions for the use of colour and the inclusion of graphics in documents.
For example, on page 2, it says
You should to set up a site default for these options, for the driver that you normally use. Suppose that you wish for the color package to always default to use specials for the PostScript driver, dvipsone. In that case create a file color.cfg containing the line:
Normally you will want an identical file graphics.cfg to set a similar default for the graphics packages.
I therefore have
graphics.cfg set up in the personal TEXMF tree.
This is something of a pain, however. If I need to compile cleanly, I put
TEXMFHOME=/non-existent-directory precisely so that these configuration files are not loaded. In this case, the standard TeX Live versions will be picked up.
So I could, I think, just drop these files from my home directory altogether. However, they are useful for some purposes e.g. for additions to the standard configuration.
What is the best way to handle this? Is there a way of including the standard configuration files from within the personalised ones? Clearly I could
\input them by specifying a full path, but I'm not sure whether that's the right thing to do here.