[OE-core] why would a recipe have both do_install() and do_install_append()?

[Robert P. J. Day]

On Wed, 4 Jul 2012, Andreas Oberritter wrote:

> On 04.07.2012 08:32, Khem Raj wrote:
> > On Tue, Jul 3, 2012 at 7:22 PM, Robert P. J. Day <rpjday at crashcourse.ca> wrote:
> >>
> >>   i'm probably just misreading something, but what is the point of a
> >> recipe having both a do_install() and do_install_append() function?
> >> for example, here's part of e2fsprogs_1.42.1.bb:
> >>
> >> do_install () {
> >>         oe_runmake 'DESTDIR=${D}' install
> >>         oe_runmake 'DESTDIR=${D}' install-libs
> >>         # We use blkid from util-linux now so remove from here
> >>         rm -f ${D}${base_libdir}/libblkid*
> >>         rm -rf ${D}${includedir}/blkid
> >>         rm -f ${D}${base_libdir}/pkgconfig/blkid.pc
> >> }
> >>
> >> do_install_append () {
> >>         # e2initrd_helper and the pkgconfig files belong in libdir
> >>         if [ ! ${D}${libdir} -ef ${D}${base_libdir} ]; then
> >>                 install -d ${D}${libdir}
> >>                 mv ${D}${base_libdir}/e2initrd_helper ${D}${libdir}
> >>                 mv ${D}${base_libdir}/pkgconfig ${D}${libdir}
> >>         fi
> >> }
> >>
> >>   how does that differ from simply defining a single do_install()
> >> routine?  i'm willing for this to be a dumb question.
> >
> > it does not. I think it could be arguably done in same do_install
>
> Yes.
>
> > but it does have some logical separation where the append operation is
> > moving files from /lib to /usr/lib
>
> It would be better to just use a comment and/or empty line for logical
> separation.
>
> > in theory another use of it is that you can override do_install_append
> > in a .bbappend file
> > and still reuse the do_install.
>
> AFAICT, you can't override an append. Both appends, the original and the
> bbappended, would get executed.

  ok, now i *definitely* want to know whether this would work or not
since there are a few recipes that define both do_install() and
do_install_append().

rday

-- 

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

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