Dear Liam, > I am using asdf-system-connections and notice a glitch in its design. As the > original author no longer maintains it, I'm try to fix this myself. This > system is designed to allow the loading of a connected system (say "A") > automatically when two or more dependent systems (say "B" and "C") are > loaded. The problem I'm encountering is that when another system (say "D") > is defined to depend on B and C, then A is not loaded until after D is done > loading, but D may need the definitions in A. asdf-system-connections > defines a function load-connected-systems which does the work of loading the > connected system definitions, but this is called from a new #'operate :after > method which apparently doesn't get called until A is done loading. > If you depend on A rather than merely on B and C, then the obvious solution is to depend on A. Actually, I would go so far as to discourage use of asdf-system-connections, and encourage only explicit dependency on connection systems. IIUC, the hu.dwim team changed their systems this way, at my suggestion.
> I am looking for a place from which to call load-connected-systems that will > trigger its call as soon as it's able, i.e., immediately once both "B" and > "C" are loaded. I'm not familiar with the internals of ASDF and wonder if > someone can guide me to a good place to define this. > There is no such place. Even what asdf-system-connections is a bit of a stretch. On @(ASDF3), you could try an after method on make-plan, or something like that, but it will be quite ugly, and will confuse the hell out of the methods that call traverse-action directly, etc. Frankly, the whole idea is bunk. A build system ought to be predictable, reproducible, and minimize surprise. asdf-system-connections, as it stands, is not great in this regards, but at least does not disrupt the internal dependency model of ASDF; it stands on top. Your proposed extension requires subverting basic invariants of ASDF internals. —♯ƒ • François-René ÐVB Rideau •Reflection&Cybernethics• http://fare.tunes.org Many people escape old fairy tales (creationism, homeopathy, monarchy) only to fall into new ones (democracy, socialism, global warmism)...
