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#!/bin/sh
#
# Author: Laura Abbott <labbott@fedoraproject.org>
#
# Apply a stable patch update to the Fedora tree. This takes care of
# - Downloading the patch from kernel.org
# - Uploading the source file
# - Removing old patch files
# - Updating the spec file stable version
# - Adding a proper changelog entry
#
# Based on steps from https://fedoraproject.org/wiki/Kernel/DayToDay#Stable_kernel_update
#
# Args: Stable version to update (e.g. 4.7.7, 4.8.1)
if [ $# -lt 1 ]; then
echo "Need a version"
exit 1
fi
VERSION=`echo $1 | cut -d . -f 1`
if [ -z $VERSION ]; then
echo "Malformed version $1"
exit 1
fi
PATCHLEVEL=`echo $1 | cut -d . -f 2`
if [ -z $VERSION ]; then
echo "Malformed version $1"
exit 1
fi
SUBLEVEL=`echo $1 | cut -d . -f 3`
if [ -z $VERSION ]; then
echo "Malformed version $1"
exit 1
fi
if [ ! -f patch-$1.xz ]; then
wget https://cdn.kernel.org/pub/linux/kernel/v4.x/patch-$1.xz
if [ ! $? -eq 0 ]; then
echo "Download fail"
exit 1
fi
fi
grep $1 sources &> /dev/null
if [ ! $? -eq 0 ]; then
fedpkg upload patch-$1.xz
# Cryptic awk: search for the previous patch level (if one exists) and
# remove it from the source file
awk -v VER=$VERSION.$PATCHLEVEL.$((SUBLEVEL-1)) '$0 !~ VER { print $0; }' < sources > sources.tmp
mv sources.tmp sources
fi
# Update the stable level
awk -v STABLE=$SUBLEVEL '/%define stable_update/ \
{ print "%define stable_update " STABLE } \
!/%define stable_update/ { print $0 }' \
< kernel.spec > kernel.spec.tmp
mv kernel.spec.tmp kernel.spec
# Reset the base release for use with rpmdev-bumpspec
BASERELEASE=`cat kernel.spec | grep "%global baserelease" | cut -d ' ' -f 3 | head -c 1`00
BASERELEASE=$(($BASERELEASE-1))
BASERELEASE=$BASERELEASE perl -p -i -e 's|%global baserelease.*|%global baserelease $ENV{'BASERELEASE'}|' kernel.spec
rpmdev-bumpspec -c "Linux v$1" kernel.spec
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