Danek Duvall wrote:
On Tue, May 19, 2009 at 03:28:02PM -0700, Brock Pytlik wrote:
It would seem to me that we don't want the transitive closure here; we
want any dependencies to be directly stated in case the other packages
change dependencies later on.
Well, my thought was that in the past, we've always told people, unless
I've misunderstood, to depend on the transitive closure. I know we've
suggested that people trim their dependencies because the dependencies
will be caught by the closure. Perhaps I've misunderstood the reasoning
behind those directions before. Of course, since I can't find any of
those emails off the top of my head, here's a rough example of what I
thought we'd told people in the past. Suppose I'm publishing foo, which
needs things from the packages bar and baz. Further, suppose bar depends
on baz. I thought we'd told the people publishing foo to only depend on
bar, since baz would be picked up buy bar's dependency.
I think you've probably misunderstood the situations. What we've seen is
foo with a dependency on bar, which itself drags in a depedency on baz (but
foo doesn't use baz directly) and some folks have wanted to put a
dependency in foo on baz. But that's not right, since the use of baz is an
implementation detail of bar.
For ELF dependencies, if you do the simple thing and run "ldd", it will
show you the closure of the libraries used. Many people refer to this list
of libraries as the dependencies of the original binary, because they don't
know how to get the list that binary itself depends on (elfdump -d). I
imagine many of the requests have been because of this, and a general
sloppiness about dependency gathering and package granularity.
Danek
Aah. Ok, then I almost certainly didn't really understand the subleties
of what was going on. Ok, I'll evaluate the implicit dependencies
against the declared dependencies, instead of the closure.
Brock
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