diskimage-builder/elements/yum-minimal/pre-install.d/03-yum-cleanup
Ian Wienand f5dff9c52a Rework yum-minimal locale cleanup
It turns out our manual locale cleanup is causing issues (see
I54490b17a7f8b2f977369044fcc6bb49cc13768e).  Upon further
investigation, I think this is a better approach than manually
deleting repos.

glibc on Fedora obeys the %_install_langs macro for reducing the
installed locales (as mentioned in the comments, F24 has moved to
having different packages, but worry about that later).

So our existing clear-out is really only required for CentOS, whose
glibc does not have any way to indicate to build less locales.
However, %_install_langs is still correct there, as it restricts some
of the translation files and other things installed with the %lang
macro in spec files.

This is complicated by us having to set this at glibc-common install
time, which happens with the "yum" from outside the chroot (i.e. on
trusty).  Since this is too old to have flags to pass this, we need to
fiddle with rpmmacros.

I've tested this with fedora-minimal builds and the locales file is
about 2MiB, which is what it was after the cleanups, and the listed
locales are only those we expect (i.e. it appears to be working).

Change-Id: I528a68beeb7b2ceec25ccbec1900670501608158
2016-05-31 15:14:24 +10:00

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#!/bin/bash
#
# Copyright 2015 Hewlett-Packard Development Company, L.P.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
#
if [ "${DIB_DEBUG_TRACE:-0}" -gt 0 ]; then
set -x
fi
set -eu
set -o pipefail
# effectively: febootstrap-minimize --keep-zoneinfo --keep-rpmdb --keep-services "$target"
# This is only required on CentOS ... see notes in
# root.d/08-yum-chroot about %_install_langs
if [[ $DISTRO_NAME != "fedora" ]]; then
# Stripping *all* locales is a bad idea. For now, we take the
# suggestion in [1] for reducing this
# [1] https://bugzilla.redhat.com/show_bug.cgi?id=156477
if [ ! -f /usr/lib/locale/locale-archive ]; then
die "locale-archive not found? Can not do cleanup."
fi
# now the archive has everything in it, and is about 100MiB. Strip it
# to just en_US (basically, this is the locale we support if you ssh
# in, other than POSIX)
localedef --delete-from-archive \
$(localedef --list-archive | grep -v '^en_US' | xargs)
# This removes the locales from the archive index but doesn't rebuild
# the file, so it is still the same size (maybe it is sparse?
# presumably as it's mmapped you don't want to fiddle with the offsets
# of locales in the archive on a live system. We are not live).
# build-locale-archive is a tool provided by the RH packaging of
# glibc. Documentation is scarce, but it takes the pre-built locales
# in the tmpl file and creates an archive. It seems originally the
# installer would set some flags to rpm to tell the package what
# languages to pick out of the template, but along the way, this was
# reverted to install them (size considered less important than locale
# support).
# We hack this by moving the locale-archive we've removed the extra
# locales from to the template, then re-run the build.
mv /usr/lib/locale/locale-archive /usr/lib/locale/locale-archive.tmpl
# rebuild archive from template
/usr/sbin/build-locale-archive
# leave empty template behind as package does. I think this stops
# upgrades redoing things
echo > /usr/lib/locale/locale-archive.tmpl
# remove the unnecessary source locale files and iconv files
pushd /usr/share/locale
find . ! -name 'locale.alias' -delete
popd
rm -rf {lib.lib64}/gconv
fi
# docs
rm -rf /usr/share/{doc,info,gnome/help}
# cracklib
rm -rf /usr/share/cracklib
# i18n
rm -rf /usr/share/i18n
# sln
rm -rf /sbin/sln
# ldconfig
rm -rf /etc/ld.so.cache /var/cache/ldconfig
mkdir -p --mode=0755 /var/cache/ldconfig