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file loading query
re: 1. Anybody know a *portable* trick I can use to get embedded calls to LOAD
to use the parent file's pathname as a default?
You needn't be a privileged implementor to use Lucid's idea.
This should be portable:
(defvar *my-load-pathname* nil)
(defun my-load (partial-path)
(let ((*my-load-pathname* (merge-pathnames partial-path *my-load-pathname*)))
and replace all calls to load in files with calls to my-load, e.g.,
A more general thing involving twiddling the prefix of a directory tree
from which embedded loads will occur in various subdirectories might be
(defun load-from-subtree (partial-path path-function)
(let ((*my-load-pathname* (funcall path-function partial-path *my-load-pathname*)))
and replace embedded load calls with load-from-subtree. Typically the
path-function will concatenate the directories of *my-load-pathname* and
partial-path, or something. At least on Lucid 3.0, merge-pathnames serves
as such a function, as in (merge-pathnames "arith/bignum" "~/broken/mork.bin").