[gentoo-dev] EAPI 7, BDEPEND and pkg_*inst

[Michael Haubenwallner]

Hi,

HOORAY, seems like EAPI 7 might be able to obsolete the "prefix-chaining"
portage patch I've carried in prefix-overlay all the time, thank you for that!

However, a first thing being unclear already came up when bumping EAPI 6 to 7:

For example, the current app-misc/ca-certificates ebuild (EAPI 6) contains:

 # c_rehash: we run `c_rehash`
 # debianutils: we run `run-parts`
 RDEPEND="${DEPEND}
     app-misc/c_rehash
     sys-apps/debianutils"

 pkg_postinst() {
    if [ -d "${EROOT}/usr/local/share/ca-certificates" ] ; then
        # if the user has local certs, we need to rebuild again
        # to include their stuff in the db.
        # However it's too overzealous when the user has custom certs in place.
        # --fresh is to clean up dangling symlinks
        "${EROOT}"/usr/sbin/update-ca-certificates --root "${ROOT}"
    fi
 }

Thing is, these RDEPENDs are not really required to "run" ca-certificates, but to
administrate it - which eventually is done on the CBUILD machine (from within the
ebuild, like in pkg_postinst currently), not necessarily on the CHOST machine.

So I do not necessarily want these RDEPENDs to be installed on the CHOST machine,
given that they may not be executed from within the CBUILD machine at all.

So the first idea is to move both RDEPENDs into BDEPEND.  But then, they are
not guaranteed to be available during pkg_postinst - like for a binary package.

Question now is: Is this wrong behaviour in the ebuild,
or is this something where EAPI 7 is still insufficient for?

When this is wrong (probably independent of EAPI 7 already) in the ebuild:
How can the ebuild get such a use case right, especially with EAPI 7?

Thanks!
/haubi/