scripts/kernel_bump.sh

   1 #!/bin/sh
   2 # SPDX-License-Identifier: GPL-2.0-or-later
   3 #
   4 # Copyright (C) 2024 Olliver Schinagl <oliver@schinagl.nl>
   5
   6 set -eu
   7 if [ -n "${DEBUG_TRACE_SH:-}" ] && \
   8    [ "${DEBUG_TRACE_SH:-}" != "${DEBUG_TRACE_SH#*"$(basename "${0}")"*}" ] || \
   9    [ "${DEBUG_TRACE_SH:-}" = 'all' ]; then
  10         set -x
  11 fi
  12
  13 REQUIRED_COMMANDS='
  14         [
  15         basename
  16         command
  17         echo
  18         exit
  19         git
  20         printf
  21         sed
  22         set
  23         shift
  24         sort
  25 '
  26
  27 _msg()
  28 {
  29         _level="${1:?Missing argument to function}"
  30         shift
  31
  32         if [ "${#}" -le 0 ]; then
  33                 echo "${_level}: No content for this message ..."
  34                 return
  35         fi
  36
  37         echo "${_level}: ${*}"
  38 }
  39
  40 e_err()
  41 {
  42         _msg 'err' "${*}" >&2
  43 }
  44
  45 e_warn()
  46 {
  47         _msg 'warning' "${*}"
  48 }
  49
  50 e_notice()
  51 {
  52         _msg 'notice' "${*}"
  53 }
  54
  55 usage()
  56 {
  57         echo "Usage: ${0}"
  58         echo 'Helper script to bump the target kernel version, whilst keeping history.'
  59         echo '    -c  Migrate config files (e.g. subtargets) only.'
  60         echo "    -p  Optional Platform name (e.g. 'ath79' [PLATFORM_NAME]"
  61         echo "    -r  Optional comma separated list of sub-targets (e.g. 'rtl930x' [SUBTARGET_NAMES]"
  62         echo "    -s  Source version of kernel (e.g. 'v6.1' [SOURCE_VERSION])"
  63         echo "    -t  Target version of kernel (e.g. 'v6.6' [TARGET_VERSION]')"
  64         echo
  65         echo 'All options can also be passed in environment variables (listed between [BRACKETS]).'
  66         echo 'Note that this script must be run from within the OpenWrt git repository.'
  67         echo 'Example: scripts/kernel_bump.sh -p realtek -s v6.1 -t v6.6'
  68 }
  69
  70 cleanup()
  71 {
  72         trap - EXIT HUP INT QUIT ABRT ALRM TERM
  73
  74         if [ -n "${initial_branch:-}" ] && \
  75            [ "$(git rev-parse --abbrev-ref HEAD)" != "${initial_branch:-}" ]; then
  76                 git switch "${initial_branch}"
  77         fi
  78 }
  79
  80 init()
  81 {
  82         src_file="$(readlink -f "${0}")"
  83         src_dir="${src_file%%"${src_file##*'/'}"}"
  84         initial_branch="$(git rev-parse --abbrev-ref HEAD)"
  85         initial_commitish="$(git rev-parse HEAD)"
  86
  87         if [ -n "$(git status --porcelain | grep -v '^?? .*')" ]; then
  88                 echo 'Git respository not in a clean state, will not continue.'
  89                 exit 1
  90         fi
  91
  92         if [ -n "${src_dir##*'/scripts/'}" ]; then
  93                 echo "This script '${src_file}' is not in the scripts subdirectory, this is unexpected, cannot continue."
  94                 exit 1
  95         fi
  96
  97         source_version="${source_version#v}"
  98         target_version="${target_version#v}"
  99
 100         trap cleanup EXIT HUP INT QUIT ABRT ALRM TERM
 101 }
 102
 103 bump_kernel()
 104 {
 105         if [ -z "${platform_name}" ] || \
 106            [ -d "${PWD}/image" ]; then
 107                 platform_name="${PWD}"
 108         fi
 109         platform_name="${platform_name##*'/'}"
 110
 111         _target_dir="${src_dir}/../target/linux/${platform_name}"
 112
 113         if [ ! -d "${_target_dir}/image" ]; then
 114                 e_err "Cannot find target linux directory '${_target_dir:-not defined}'. Not in a platform directory, or -p not set."
 115                 exit 1
 116         fi
 117
 118         git switch --force-create '__openwrt_kernel_files_mover'
 119
 120         if [ "${config_only:-false}" != 'true' ]; then
 121                 for _path in $(git ls-tree -d -r --name-only '__openwrt_kernel_files_mover' "${_target_dir}" |
 122                                sed -n "s|^\(.*-${source_version}\).*|\1|p" |
 123                                sort -u); do
 124                         if [ ! -e "${_path}" ] || \
 125                            [ "${_path}" = "${_path%%"-${source_version}"}" ]; then
 126                                 continue
 127                         fi
 128
 129                         _target_path="${_path%%"-${source_version}"}-${target_version}"
 130                         if [ -e "${_target_path}" ]; then
 131                                 e_err "Target '${_target_path}' already exists!"
 132                                 exit 1
 133                         fi
 134
 135                         git mv \
 136                                 "${_path}" \
 137                                 "${_target_path}"
 138                 done
 139         fi
 140
 141         for _config in $(git ls-files "${_target_dir}" |
 142                          sed -n "s|^\(.*config-${source_version}\).*|\1|p" |
 143                          sort -u); do
 144                 if [ ! -e "${_config}" ]; then
 145                         continue
 146                 fi
 147
 148                 _subtarget="${_config%%"/config-${source_version}"}"
 149                 if [ -n "${subtarget_names:-}" ]; then
 150                         echo "${subtarget_names:-}" | while IFS=',' read -r _subtarget_name; do
 151                                 if [ "${_subtarget_name}" = "${_subtarget##*'/'}" ]; then
 152                                         git mv "${_config}" "${_subtarget}/config-${target_version}"
 153                                 fi
 154                         done
 155                 else
 156                         git mv "${_config}" "${_subtarget}/config-${target_version}"
 157                 fi
 158         done
 159
 160         git commit \
 161                 --signoff \
 162                 --message "kernel/${platform_name}: Create kernel files for v${target_version} (from v${source_version})" \
 163                 --message 'This is an automatically generated commit.' \
 164                 --message 'When doing `git bisect`, consider `git bisect --skip`.'
 165
 166         git checkout 'HEAD~' "${_target_dir}"
 167         git commit \
 168                 --signoff \
 169                 --message "kernel/${platform_name}: Restore kernel files for v${source_version}" \
 170                 --message "$(printf "This is an automatically generated commit which aids following Kernel patch history,\nas git will see the move and copy as a rename thus defeating the purpose.\n\nSee: https://lists.openwrt.org/pipermail/openwrt-devel/2023-October/041673.html\nfor the original discussion.")"
 171         git switch "${initial_branch:?Unable to switch back to original branch. Quitting.}"
 172         GIT_EDITOR=true git merge --no-ff '__openwrt_kernel_files_mover'
 173         git branch --delete '__openwrt_kernel_files_mover'
 174         echo "Deleting merge commit ($(git rev-parse HEAD))."
 175         git rebase HEAD~1
 176
 177         echo "Original commitish was '${initial_commitish}'."
 178         echo 'Kernel bump complete. Remember to use `git log --follow`.'
 179 }
 180
 181 check_requirements()
 182 {
 183         for _cmd in ${REQUIRED_COMMANDS}; do
 184                 if ! _test_result="$(command -V "${_cmd}")"; then
 185                         _test_result_fail="${_test_result_fail:-}${_test_result}\n"
 186                 else
 187                         _test_result_pass="${_test_result_pass:-}${_test_result}\n"
 188                 fi
 189         done
 190
 191         echo 'Available commands:'
 192         # As the results contain \n, we expect these to be interpreted.
 193         # shellcheck disable=SC2059
 194         printf "${_test_result_pass:-none\n}"
 195         echo
 196         echo 'Missing commands:'
 197         # shellcheck disable=SC2059
 198         printf "${_test_result_fail:-none\n}"
 199         echo
 200
 201         if [ -n "${_test_result_fail:-}" ]; then
 202                 echo 'Command test failed, missing programs.'
 203                 test_failed=1
 204         fi
 205 }
 206
 207 main()
 208 {
 209         while getopts 'chp:r:s:t:' _options; do
 210                 case "${_options}" in
 211                 'c')
 212                         config_only='true'
 213                         ;;
 214                 'h')
 215                         usage
 216                         exit 0
 217                         ;;
 218                 'p')
 219                         platform_name="${OPTARG}"
 220                         ;;
 221                 'r')
 222                         subtarget_names="${OPTARG}"
 223                         ;;
 224                 's')
 225                         source_version="${OPTARG}"
 226                         ;;
 227                 't')
 228                         target_version="${OPTARG}"
 229                         ;;
 230                 ':')
 231                         e_err "Option -${OPTARG} requires an argument."
 232                         exit 1
 233                         ;;
 234                 *)
 235                         e_err "Invalid option: -${OPTARG}"
 236                         exit 1
 237                         ;;
 238                 esac
 239         done
 240         shift "$((OPTIND - 1))"
 241
 242         platform_name="${platform_name:-${PLATFORM_NAME:-}}"
 243         subtarget_names="${subtarget_names:-${SUBTARGET_NAMES:-}}"
 244         source_version="${source_version:-${SOURCE_VERSION:-}}"
 245         target_version="${target_version:-${TARGET_VERSION:-}}"
 246
 247         if [ -z "${source_version:-}" ] || [ -z "${target_version:-}" ]; then
 248                 e_err "Source (${source_version:-missing source version}) and target (${target_version:-missing target version}) versions need to be defined."
 249                 echo
 250                 usage
 251                 exit 1
 252         fi
 253
 254         check_requirements
 255
 256         init
 257         bump_kernel
 258         cleanup
 259 }
 260
 261 main "${@}"
 262
 263 exit 0