[OE-core] can pkg_{pre, post}rm functions be run at all for image creation?

[Robert P. J. Day]

On Sat, 2 Aug 2014, Khem Raj wrote:

> On 14-08-02 15:57:00, Robert P. J. Day wrote:
> > On Sat, 2 Aug 2014, Khem Raj wrote:
> >
> > > On Sat, Aug 2, 2014 at 9:34 AM, Robert P. J. Day <rpjday at crashcourse.ca> wrote:
> > > > say, pkg_prerm() functions would never be written with respect to the
> > > > variable ${D}, which would be relevant only during image creation. but
> > > > i can see things like this in sysklogd.inc:
> > > >
> > > > pkg_prerm_${PN} () {
> > > >         if test "x$D" = "x"; then
> > >
> > > note that its not ${D} (bitbake context) but $D which is evaluated
> > > in the context when the script is run.
> >
> >   i still don't understand ... what are the possible values of $D
> > here, and what would they represent?
>
> At build time it will not be expanded by bitbake like ${D} is. but
> during image creation it will be. But when doing on-device install
> of this package $D will be empty. Its a way to differentiate actions
> during image creation and on-device install/update/remove

  but the yocto dev manual states pretty clearly that pkg_prerm and
pkg_postrm functions are *not* used during image creation. so you're
saying they are? under what circumstances?

rday

-- 

========================================================================
Robert P. J. Day                                 Ottawa, Ontario, CANADA
                        http://crashcourse.ca

Twitter:                                       http://twitter.com/rpjday
LinkedIn:                               http://ca.linkedin.com/in/rpjday
========================================================================