Hi Kilian,
On 10/03/15 18:32, Kilian Cavalotti wrote:
On Tue, Mar 10, 2015 at 10:18 AM, Stuart Barkley <[email protected]> wrote:
Is there a good way to see a dependency tree with easybuild (I'm now
running 2.0.0)? I'm trying to reconcile different dependency
requirements for my large build and am finding it difficult to
determine what packages are requiring other packages.
+1 on that. And that would be a good start to implement an "uninstall"
option, as described in
https://github.com/hpcugent/easybuild-framework/issues/590
BTW, this was supposed to be part of EB 2.0 (cf. #1000), but it
apparently got postponed.
Just to clarify: having support for uninstalling installations performed
with EasyBuild was never part of the release plan for EasyBuild v2.0
(see the description in
https://github.com/hpcugent/easybuild-framework/issues/1000), it was
just mentioned by someone that this may be interested/useful to have it
in there.
There are a couple of issues that make support for uninstalling stuff
difficult, or even impossible, to get right (as was discussed during the
last hackathon, I believe):
- it requires support for enabling reverse dependency tracking (not
trivial, but doable)
- it requires to be able to generate reverse dependency info for an
existing install base; either the reverse deps information is complete,
or useless (not that easy)
- even with reverse dependency tracking in place, there's never a
guarantee that something can be removed without damaging other
installations that depend on what's being removed (consider software
stacks installed in different installation prefixes, but with
cross-dependencies)
The main issue is that nobody has really picked up on this yet, so no
work is being done on it actively.
Unfortunately, features (and the documentation to go with them) don't
appear out of thin air. ;-)
The guys in Jülich have done some scripting related to this (see
https://github.com/hpcugent/easybuild-framework/pull/1190), some ideas
can be stolen from there to incorporate into the EasyBuild framework to
add support for uninstalling stuff, but it's never going to be perfect
(in the sense that it'll probably always need to be combined with
--force together with getting a warning thrown at you when using
--uninstall).
regards,
Kenneth
