update-sources

#!/bin/bash
# vim: set ts=4 sw=4 sts=4 et :

set -e
set -o pipefail

[ "$DEBUG" = "1" ] && set -x

exit_clean() {
    local exit_code=$?
    if [ $exit_code -gt 0 ]; then
        git checkout -- version
    fi
    exit "${exit_code}"
}

distance_version() {
    read -ra VER1 <<<"$(echo "$1" | tr '.' ' ')"
    read -ra VER2 <<<"$(echo "$2" | tr '.' ' ')"

    [[ ${VER1[0]} -eq ${VER2[0]} ]] && [[ $((VER1[1] - VER2[1])) -le 1 ]] && [[ $((VER1[1] - VER2[1])) -ge 0 ]]
}

LOCALDIR="$(readlink -f "$(dirname "$0")")"
BUILDERDIR="$LOCALDIR/../../"
VERSION="$(cat version)"
BRANCH="$1"

if [ -z "$BRANCH" ]; then
    # Check if qubes-builder Makefile is here
    # else rely on current checkout branch
    if [ -e "$BUILDERDIR/Makefile" ]; then
        BRANCH="$(make -C ../../ -s get-var GET_VAR=BRANCH_linux_kernel 2>/dev/null)"
    else
        BRANCH="$(git rev-parse --abbrev-ref HEAD)"
    fi
fi

# Filter allowed branches
if [[ ! "$BRANCH" =~ ^stable-[0-9]+\.[0-9]+$ ]] && [ "$BRANCH" != "master" ]; then
    echo "Cannot determine kernel branch to use."
    exit 1
fi

LATEST_KERNEL_VERSION="$(python3 "$LOCALDIR/kernel-updater.py" --check-update --version "$VERSION" --branch "$BRANCH")"

if [ "x$LATEST_KERNEL_VERSION" == "x" ]; then
    echo "Current kernel version in branch ${BRANCH} is up to date"
    exit 0
fi

# Download latest kernel
trap 'exit_clean' 0 1 2 3 6 15

echo "$LATEST_KERNEL_VERSION" > version
make get-sources

FC_LATEST="$(curl -s -L https://dl.fedoraproject.org/pub/fedora/linux/releases | sed -e 's/<[^>]*>//g' | awk '{print $1}' | grep -o "[1-9][0-9]" | tail -1)"
STABLE_KERNEL="$(dnf -q repoquery kernel --disablerepo=* --enablerepo=fedora --enablerepo=updates --releasever="$FC_LATEST" | sort -V | tail -1 | cut -d ':' -f2 | cut -d '-' -f1)"
if [ "$BRANCH" == "master" ]; then
    TESTING_KERNEL="$(dnf -q repoquery kernel --disablerepo=* --enablerepo=fedora --enablerepo=updates --enablerepo=updates-testing --releasever="$FC_LATEST" | sort -V | tail -1 | cut -d ':' -f2 | cut -d '-' -f1)"
    RAWHIDE_KERNEL="$(dnf -q repoquery kernel --disablerepo=* --enablerepo=fedora --enablerepo=updates --releasever=rawhide | grep -v "rc[0-9]*" | sort -V | tail -1 | cut -d ':' -f2 | cut -d '-' -f1 || true)"
fi

if distance_version "$STABLE_KERNEL" "$LATEST_KERNEL_VERSION"; then
    "$LOCALDIR/get-fedora-latest-config" --releasever "$FC_LATEST"
    mv config-base-"$STABLE_KERNEL" config-base
elif [ "$BRANCH" == "master" ] && { distance_version "$TESTING_KERNEL" "$LATEST_KERNEL_VERSION"; }; then
    "$LOCALDIR/get-fedora-latest-config" --releasever "$FC_LATEST" --include-testing
    mv config-base-"$STABLE_KERNEL" config-base
elif [ "$BRANCH" == "master" ] && { distance_version "$RAWHIDE_KERNEL" "$LATEST_KERNEL_VERSION"; }; then
    "$LOCALDIR/get-fedora-latest-config" --releasever rawhide
    mv config-base-"$RAWHIDE_KERNEL" config-base
else
    echo "Cannot determine latest config for kernel ${LATEST_KERNEL_VERSION}. Use the current existing config..."
fi