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library_directory/1 hook:- multifile user:library_directory/1.
user:library_directory(+DirSpec)
Defines a library directory. Used by predicates taking file_spec as input argument.
file_spec
Either an atom giving the path to
a file or directory, or PathAlias(DirSpec), where PathAlias is
defined by a file_search_path/2 rule.
These facts define directories to search when a file specification
library(File) is expanded to the full path, in addition
to the predefined library path, which is tried first.
The file_search_path mechanism is an extension of the
library_directory scheme and is preferred.
| ?- [user].
% compiling user...
| :- multifile user:library_directory/1.
| library_directory('/usr/joe_bob/prolog/libs').
| end_of_file.
% compiled user in module user, 0 msec 384 bytes
yes
| ?- ensure_loaded(library(flying)).
% loading file /usr/joe_bob/prolog/libs/flying.qof
…
All error handling is done by the predicates extended by this hook.
absolute_file_name/[2,3],
file_search_path/2,
load_files/[1,2],