bin/merge-main-branch

   1 #!/bin/bash
   2
   3 # shellcheck disable=SC2029
   4
   5 set -eu
   6
   7 error () {
   8     echo "error: ${*}" >&2
   9     exit 1
  10 }
  11
  12 USAGE="Usage: $(basename "$0") SRC DST"
  13
  14 [ $# -eq 2 ] || error "$USAGE"
  15
  16 SRC="$1"
  17 DST="$2"
  18 WORKDIR=$(mktemp -d)
  19
  20 packages_in_suite() {
  21    local suite="$1"
  22    [ -n "$suite" ] || return 1
  23    ssh reprepro@incoming.deb.tails.boum.org reprepro list "$suite" \
  24        | sed -r 's,^([^|]+\|){2},,' \
  25        | sort --stable --key=1,1 --key=2,2
  26 }
  27
  28 ### Save the list of packages currently present in the APT suite we
  29 ### want to merge into
  30
  31 packages_in_suite "$DST" > "$WORKDIR/$DST.orig.list"
  32
  33 ### Make sure we are not going to overwrite newer packages with older
  34 ### ones
  35
  36 echo "I: Diff between the $SRC and $DST custom APT suites:"
  37
  38 ssh reprepro@incoming.deb.tails.boum.org \
  39     tails-diff-suites "$SRC" "$DST"
  40
  41 echo "Check, in the above diff, if any package is newer in $DST than in $SRC."
  42 echo "Abort if, and only if, that's the case."
  43 echo -n "Proceed with the merge? (y/n) "
  44 read -r answer
  45 [ "$answer" = 'y' ] || exit 1
  46
  47 echo "I: merging the $SRC Git branch into $DST"
  48 echo "I: If you have to resolve a merge conflict in debian/changelog,"
  49 echo "I: ensure only the latest UNRELEASED entry is present,"
  50 echo "and remove older versions that were never released."
  51 git checkout "$DST"
  52 git merge "origin/$DST"
  53 git merge "$SRC"
  54
  55 echo "I: merging the $SRC APT suite into $DST"
  56 ssh reprepro@incoming.deb.tails.boum.org \
  57     tails-merge-suite "$SRC" "$DST"
  58
  59 echo "I: Restoring config/base_branch on $DST if needed"
  60 echo "${DST}" > config/base_branch
  61 git commit config/base_branch -m "Restore ${DST}'s base branch." || :
  62
  63 echo "I: Pushing the $DST Git branch"
  64 git push origin "${DST}:${DST}"
  65
  66 packages_in_suite "$DST" > "$WORKDIR/$DST.new.list"
  67
  68 echo "I: Diff between the $DST APT suite before and after merging:"
  69 set +e
  70 diff -Naur "$WORKDIR/$DST.orig.list" "$WORKDIR/$DST.new.list"
  71 RET=$?
  72 set -e
  73 case "$RET" in
  74    0|1)
  75       # diff did its job just fine
  76       :
  77       ;;
  78    2)
  79       # diff had trouble
  80       error "diff(1) failed."
  81       ;;
  82    *)
  83       # undocumented diff exit code
  84       error "diff(1) returned $? -- I don't know what it means."
  85       ;;
  86 esac
  87 echo "Verify that the merge did not re-add to $DST any package that was"
  88 echo "removed from it on purpose earlier."
  89 echo "If there are any, remove them manually."