On 04/12/2012 20:52, Walter Hurry wrote:
I have another minor issue with pkgng:
Say package foo-1.0 depends on bar-1.0. Then bar-1.0 is upgraded to
version 1.1.
So a new package bar-1.1 is built (from the port), and replaces bar-1.0
in the repository. The repository database is then updated using 'pkg
repo'.
Now the repository database is out of whack: It still thinks foo-1.0
depends on bar-1.0 (the deps table in the compressed repo.sqlite database
- i.e. repo.txz in the repository).
Admittedly the packages will still install (from the repository in
question) on another machine, but nevertheless it doesn't seem quite
right.
One workaround is to re-create the foo package (plus any others depending
on bar) and refresh the repository, but is this an omission?
This is a flaw in your package repository maintenance process. If
bar-1.0 is upgraded to bar-1.1 then you should rebuild all the packages
that have a direct dependency on it, and possibly many of the packages
that have an indirect dependency too. I say 'rebuild' because that is
generally what happens in practice, even though in many cases you could
probably get away with simply repackaging everything that requires bar-1.x.
Not always though, and it's hard to tell the difference programatically
in the general case. If, for example, bar-1.0 provides libbar.so.1 and
bar-1.1 provides libbar.so.2 then full rebuilds are definitely required
for anything that ultimately links against libbar.so. And to discover
that 100% accurately, you have to examine the dynamic linkage
characteristics of every ELF file in every package with bar-1.x
somewhere in its dependency tree. (No, LIB_DEPENDS cannot be relied on
for this) That's just once example reason why you might need a full
rebuild. There are many more. Which is why it is standard to just punt
and rebuild everything that requires bar-1.x.
Tracking this sort of stuff manually is pretty tedious. Which is why
things like poudriere and tinderbox exist; so you can automate.
Cheers,
Matthew
--
Dr Matthew J Seaman MA, D.Phil.
PGP: http://www.infracaninophile.co.uk/pgpkey
JID: matt...@infracaninophile.co.uk
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