I suggest adding text like this, to :help $HOME:
"On Windows, if $HOME is not defined as an environment variable, then
at runtime Vim will set it to the expansion of $HOMEDRIVE$HOMEPATH."
Further, I would add links like:
"See |$HOME| for when this is not set as an environment variable on
your system."
...to a few places, specifically:
:help vimrc
:help gvimrc
(note on these two, it claims when $HOME is unset, $VIM is used, which
I don't think is true since $VIM sets $HOME)
:help 'runtimepath'
:help viminfo-file-name
:help vimrc-info (maybe this needs a fuller explanation than just a
link)
:help add-global-plugin
I note that if this todo item is implemented, the text added to :help
$HOME will need an update, so probably it should stay mostly in this
one central location (unless there is a better spot):
8 Should $USERPROFILE be preferred above $HOMEDRIVE/$HOMEPATH? No,
but it's
a good fallback, thus use:
$HOME
$HOMEDRIVE$HOMEPATH
SHGetSpecialFolderPath(NULL, lpzsPath, CSIDL_APPDATA, FALSE);
$USERPROFILE
SHGetSpecialFolderPath(NULL, lpzsPath, CSIDL_COMMON_APPDATA,
FALSE);
$ALLUSERSPROFILE
$SYSTEMDRIVE\
C:\
I'm not sure how much of this is currently in the code, perhaps a
simplistic "$HOMEDRIVE$HOMEPATH" is not completely accurate even now.
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