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cleancache() {
# By default, binary mode portage downloads binary packages from repository and saves
# them in /usr/portage/packages. This saves bandwidth in case of reinstalls/downgrades,
# but will eat up lots of HDD space, possibly preventing further installs/upgrades.
# To address this issue, we check if /usr/portage/packages directory is on its own partition
# case in which we do nothing assuming that user gave it plenty space anyway. But if its
# not the case, and /usr/portage/packages is just a directory in the system / root hierarchy,
# then we make sure we remove downloaded binary packages after every installation.
# This function hooks into the pkg_postinst() phase, after the package files are written
# into the filesystem and registered into the database, and just removes the content of
# /usr/portage/packages directory (which is the binary package cache).
# In orther for this to work PORTDIR (/usr/portage) and PKGDIR(/usr/portage/packages)
# must be on the same filesystem, which is 99% the case. If they are on different
# filesystems, package cache is always saved, as mentioned above.
export local PORTDIRDEV=$(find /usr/ports/gentoo -maxdepth 0 -printf "%D")
export local PKGDIRDEV=$(find /usr/ports/gentoo/packages -maxdepth 0 -printf "%D")
if [ $PORTDIRDEV = $PKGDIRDEV ]; then
rm -rf /usr/ports/gentoo/packages/"${CATEGORY}"/"${P}"*.tbz2
fi
}
main() {
if [ "${EBUILD_PHASE}" == "postinst" ]; then
cleancache
fi
}
main
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