[asdf-devel] :depends-on to load-system or require-system?

[John Morrison]

Understood.

And thanks again!

-jm



On Wed, Sep 11, 2013 at 3:55 PM, Faré <fahree at gmail.com> wrote:

> On Wed, Sep 11, 2013 at 3:40 PM, John Morrison
> <john.nmi.morrison at gmail.com> wrote:
> > Well, I think I found the thing that triggers the problem - even if I
> didn't
> > really find the problem itself.  The :clim defsystem defines a dependency
> > that reaches into one of its components - the Goatee/presentation-history
> > file.  (Maybe the "huh?" comment in the asd file should've clued me in a
> > little before now, eh?)  My guess (based on a later filesystem date on
> the
> > file presentation-history as compared to the other file components of
> > goatee-core) is that recompiling the file as a part of clim later than
> and
> > as opposed to goatee-core made goatee appear to have changed, forcing
> > recompiiling of parents...  Then things got weird.
> >
> > When I put the #+NIL in the obvious place (see below), things work as
> > expected.  (This with ASDF 3.0.2.4 - haven't check the older versions
> > yet...)
> >
> > Does anybody have any clue why this might have been this way?  It seems
> to
> > be wrong in spirit (recompiling files of another component from outside
> any
> > operations on that specific component), and clearly raised the eyebrows
> of
> > at least one McCLIM maintainer...  In any event, thanks for the
> > troubleshooting clues, guys, and sorry for any unintentional casting of
> > aspersions...
> >
> ASDF 1 (and 2) failed to propagate timestamps from dependencies to
> dependents, and a file could appear twice, in two different systems,
> and not cause a dependency loop.
>
> ASDF 3 correctly propagates timestamps from dependencies to
> dependents. If a file appears twice, the uncompiled or out-of-date
> first occurrence causes everything that follows to be recompiled,
> including, later, the second occurrence, which will have a later
> timestamp, that next time around, will mean the first occurrence has
> been compiled after everything in the dependency loop.
>
> Conclusion: don't introduce dependency loops. They were always a bug,
> just one that was previously hidden by a deep bug in ASDF itself.
>
> Don't #+NIL the bastard, just plain kill it.
>
> —♯ƒ • François-René ÐVB Rideau •Reflection&Cybernethics•
> http://fare.tunes.org
> Dost thou love life? Then do not squander time, for that's the stuff
> life is made of. — Benjamin Franklin
>
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