util/scripts/update_submodules

   1 #!/usr/bin/env bash
   2 #
   3 # SPDX-License-Identifier: GPL-2.0-only
   4
   5 # Description:
   6 # Check all submodules for updates.  If there are more than a minimum
   7 # number of changes, create a commit to update the submodule to the
   8 # new version.
   9
  10 set -eu -o pipefail
  11
  12 VERSION="1.01"
  13 PROGRAM=$0
  14 PROGNAME="$(basename "${PROGRAM}")"
  15
  16 export LANG=C
  17 export LC_ALL=C
  18 export TZ=UTC0
  19
  20 min_commits=10
  21 TOP=${PWD}
  22 SUBMODULES_WITH_UPDATES=0
  23 submodule_dirs=()
  24 skip_sync=""
  25 max_commits_to_list=65
  26
  27 show_version() {
  28         echo "${PROGNAME} version ${VERSION}"
  29         echo
  30 }
  31
  32 usage() {
  33         echo "Usage: ${PROGNAME} [options]"
  34         echo
  35         echo "Options:"
  36         echo " -c | --changes <#>     Specify the minimum number of changes to update a repo"
  37         echo " -h | --help            Print usage and exit"
  38         echo " -R | --repo <dir>      Specify a single repo directory to update"
  39         echo " -s | --skipsync        Assume that repos are already synced"
  40         echo " -V | --version         Print the version and exit"
  41         echo
  42 }
  43
  44 get_args() {
  45         args=$(getopt -l changes:,help,repo:,skipsync,version -o c:hR:sV -- "$@")
  46         getopt_ret=$?
  47         eval set -- "${args}"
  48
  49         if [ ${getopt_ret} != 0 ]; then
  50                 usage
  51                 exit 1
  52         fi
  53
  54         while true; do
  55                 local opt
  56                 opt="$1"
  57                 shift
  58                 case "${opt}" in
  59                 -c | --changes)
  60                         min_commits="${1}"
  61                         shift
  62                         ;;
  63                 -h | --help)
  64                         usage
  65                         exit 0
  66                         ;;
  67                 -R | --repo)
  68                         submodule_dirs=("$(readlink -f "${1}")")
  69                         shift
  70                         if [[ ! -d "${submodule_dirs[0]}" ]]; then
  71                                 echo "Error: ${submodule_dirs[0]} is not valid."
  72                                 usage
  73                                 exit 1
  74                         fi
  75                         ;;
  76                 -s | --skipsync)
  77                         skip_sync=1
  78                         ;;
  79                 -V | --version)
  80                         exit 0
  81                         ;;
  82                 *)
  83                         break
  84                         ;;
  85                 esac
  86         done
  87 }
  88
  89
  90 main() {
  91         show_version
  92         get_args "$@"
  93
  94         if (( ${#submodule_dirs[@]} == 0 )); then
  95                 readarray -t submodule_dirs < <(git submodule foreach pwd | grep -v "Entering")
  96         fi
  97
  98         for submodule in "${submodule_dirs[@]}"; do
  99                 echo "Checking submodule ${submodule}"
 100                 if ! cd "$submodule"; then
 101                         echo "Error: could not cd to $submodule"
 102                         exit 1
 103                 fi
 104
 105                 initial_commit_id="$(git log --pretty='%h' -n 1 --abbrev=12)"
 106                 initial_commit_description="$(git log --pretty='%ci - (%s)' -n 1)"
 107                 if [[ ${skip_sync} != "1" ]]; then
 108                         git fetch 2>/dev/null
 109                 fi
 110
 111                 declare -a branches=("origin/main" "origin/master" "origin/trunk")
 112                 for branch in "${branches[@]}"; do
 113                         if git branch -a | grep "${branch}" > /dev/null; then
 114                                 branch_name="${branch}"
 115                                 break
 116                         fi
 117                 done
 118
 119                 updated_commit_id="$(git log --pretty='%h' -n 1 --abbrev=12 "${branch_name}" -- )"
 120                 updated_commit_description="$(git log --pretty='%ci - (%s)' -n 1 "${updated_commit_id}")"
 121                 if [ "${initial_commit_id}" = "${updated_commit_id}" ]; then
 122                         echo "No updates for ${submodule}"
 123                         continue
 124                 fi
 125                 SUBMODULES_WITH_UPDATES+=1
 126                 update_log="$(git log --oneline --abbrev=12 "${initial_commit_id}..${updated_commit_id}")"
 127                 update_count="$(echo "${update_log}" | wc -l)"
 128                 if [[ "${update_count}" -gt "${max_commits_to_list}" ]]; then
 129                         update_log=""
 130                         new_commit_terminator="."
 131                 else
 132                         new_commit_terminator=":"
 133                 fi
 134                 echo "${update_count} new commits for ${submodule}"
 135                 if [ "${update_count}" -ge "${min_commits}" ]; then
 136                         echo "Creating commit to update ${submodule##*/} submodule"
 137                         git checkout "${updated_commit_id}" > /dev/null 2>&1
 138                         cd "${TOP}" || exit 1
 139                         git add "${submodule}" > /dev/null 2>&1 || exit 1
 140                         git commit -s -F- > /dev/null 2>&1 <<-EOF
 141         Update ${submodule##*/} submodule to upstream ${branch##*/}
 142
 143         Updating from commit id ${initial_commit_id}:
 144         $initial_commit_description
 145
 146         to commit id ${updated_commit_id}:
 147         ${updated_commit_description}
 148
 149         This brings in ${update_count} new commits${new_commit_terminator}
 150         ${update_log}
 151         EOF
 152                 fi
 153         done
 154
 155         if [ "${SUBMODULES_WITH_UPDATES}" = "0" ]; then
 156                 echo "No submodules with any updates."
 157         fi
 158 }
 159
 160 main "$@"