[MacPorts] #4228: Add A Deactivate Hook

[MacPorts]

#4228: Add A Deactivate Hook
-----------------------------------+----------------------------------------
  Reporter:  matthew.c at rogers.com  |       Owner:  macports-tickets at lists.macosforge.org
      Type:  enhancement           |      Status:  new                                  
  Priority:  Normal                |   Milestone:  MacPorts base enhancements           
 Component:  base                  |     Version:                                       
Resolution:                        |    Keywords:                                       
-----------------------------------+----------------------------------------
Changes (by jmpp at macports.org):

  * milestone:  MacPorts 1.5 => MacPorts base enhancements

Old description:

> We have the post-activate hook availible to do setup tasks after the port
> has
> been activated. I've talked to jmpp looking for a similar hook for
> deactivating,
> and he tells me there isn't one.
>
> I propose a "pre-deactivate" hook that will allow the ports system to
> clean up
> any post install setup its done when the user removes it.
>
> The context in which I am working is libraries for Haskell. GHC maintains
> a list
> of package which are installed, what modules they provide, and where they
> are.
> Normally the install phase (ie: make install) registers the packages, and
> make
> uninstall removes them. Since we're putting them into a dest-root first,
> and
> then to additionally confound the system, using the image system, this
> doesn't work.
>
> I pass configure flags to not perform the registartoin and take care of
> it in
> post-activate. For correctness' sake, it would be nice to be able to tear
> these
> down. If you'd check out devel/hs-plugins, you'll see an example of what
> I'm
> talking about. That first bit where we scrub out any pre existing
> versions is a
> horrible hideous kludge and needs to be fixed. We could move that
> unregistration
> stuff into the deactivation hook.

New description:

 We have the post-activate hook availible to do setup tasks after the port
 has
 been activated. I've talked to jmpp looking for a similar hook for
 deactivating,
 and he tells me there isn't one.

 I propose a "pre-deactivate" hook that will allow the ports system to
 clean up
 any post install setup its done when the user removes it.

 The context in which I am working is libraries for Haskell. GHC maintains
 a list
 of package which are installed, what modules they provide, and where they
 are.
 Normally the install phase (ie: make install) registers the packages, and
 make
 uninstall removes them. Since we're putting them into a dest-root first,
 and
 then to additionally confound the system, using the image system, this
 doesn't work.

 I pass configure flags to not perform the registartoin and take care of it
 in
 post-activate. For correctness' sake, it would be nice to be able to tear
 these
 down. If you'd check out devel/hs-plugins, you'll see an example of what
 I'm
 talking about. That first bit where we scrub out any pre existing versions
 is a
 horrible hideous kludge and needs to be fixed. We could move that
 unregistration
 stuff into the deactivation hook.

-- 
Ticket URL: <http://trac.macosforge.org/projects/macports/ticket/4228#comment:4>
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