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#!/bin/sh

# report back on a build assignment
# either on success via:
#   "$0 $package $revision $mod_revision $repository" and tar'ed packages and logs
#   (= a tar of package(s), signature(s) and log(s)) on stdin
# or on failure via:
#   "$0 $package $revision $mod_revision $repository ERROR" and tar'ed logs

# exit codes:
#  0: ok
#  1: another instance was already running
#  2: outdated package
#  3: signature error
#  4: package error (e.g. wrong packages sent)

# TODO: sign database

# shellcheck source=conf/default.conf
. "${0%/*}/../conf/default.conf"

if [ -s "${work_dir}/build-master-sanity" ]; then
  >&2 echo 'Build master is not sane.'
  exit 1
fi

# Create a lock file and a trap.

exec 9> "${build_list_lock_file}"
if ! flock -n 9; then
  >&2 echo 'come back (shortly) later - I cannot lock build list.'
  exit 1
fi

exec 8> "${sanity_check_lock_file}"
if ! flock -s -n 8; then
  >&2 echo 'come back (shortly) later - sanity-check running.'
  exit 1
fi

clean_up_lock_file() {
  rm -f "${build_list_lock_file}"
}

trap clean_up_lock_file EXIT

if [ "$5" = 'ERROR' ]; then
# the build failed on the build slave

  if ! grep -qxF "$1 $2 $3 $4" "${work_dir}/build-list" ||
    ! [ -f "${work_dir}/package-states/$1.$2.$3.$4.locked" ]; then
    >&2 echo 'Too late, package already outdated, I ignore this error report.'
    exit 2
  fi

  # shellcheck disable=SC2154
  if ! grep -qxF "${slave}" "${work_dir}/package-states/$1.$2.$3.$4.locked"; then
    >&2 echo 'You do not build this package - move on.'
    exit 2
  fi

  # save sent build logs
  saved_build_logs=$(
    tar -vx \
      -C "${build_log_directory}/error" \
      --wildcards \
      --no-wildcards-match-slash \
      --transform="s|^|$1.$2.$3.$4.|" \
      '*.build-log.gz'
  )

  if [ -f "${work_dir}/package-states/$1.$2.$3.$4.broken" ]; then
    was_broken_before=true
  else
    was_broken_before=false
  fi

  # shellcheck disable=SC2154
  echo "${slave}" >> \
    "${work_dir}/package-states/$1.$2.$3.$4.broken"
  # shellcheck disable=SC2016
  {
    if [ -n "${saved_build_logs}" ]; then
      printf 'CREATE TEMPORARY TABLE `failures` ('
      printf '`%s` %s,' \
        'date' 'DATETIME' \
        'reason' 'SMALLINT' \
        'log_file' 'VARCHAR(512)' | \
        sed 's/,$//'
      printf ');'
      printf 'INSERT INTO `failures` (`date`,`reason`,`log_file`) VALUES'
      fail_reason_identifiers=$(
        printf 'SELECT `fail_reasons`.`id`,to_base64(`fail_reasons`.`identifier`) FROM `fail_reasons` ORDER BY `fail_reasons`.`severity`' | \
          ${mysql_command} --raw --batch | \
          sed '1d'
      )
      for saved_build_log in ${saved_build_logs}; do
        printf '%s' "${fail_reason_identifiers}" | \
          while read -r reason_id identifier; do
            if zgrep -q "^$(printf '%s' "${identifier}" | base64 -d)\$" "${build_log_directory}/error/${saved_build_log}"; then
              printf ' (from_base64("%s"),%s,from_base64("%s")),' \
                "$(
                  printf '%s' "${saved_build_log}" | \
                    sed 's|\.build-log\.gz$||;s|^.*\.||' | \
                    base64 -w0
                )" \
                "${reason_id}" \
                "$(
                  printf '%s' "${saved_build_log}" | \
                    base64 -w0
                )"
              break
            fi
          done
      done | \
        sed 's/,$//'
      printf ';\n'
      printf 'INSERT INTO `failed_builds` (`build_slave`,`build_assignment`,`date`,`reason`,`log_file`)'
      printf ' SELECT '
      printf '`build_slaves`.`%s`,' \
        'id' 'currently_building'
      printf '`failures`.`%s`,' \
        'date' 'reason' 'log_file' | \
        sed 's/,$//'
      printf ' FROM `build_slaves` JOIN `failures`'
      printf ' WHERE `build_slaves`.`name`=from_base64("%s");\n' \
        "$(
          printf '%s' "${slave}" | \
            base64 -w0
        )"
      printf 'DROP TABLE `failures`;\n'
    fi
    printf 'UPDATE `build_assignments`'
    printf ' JOIN `build_slaves` ON `build_slaves`.`currently_building`=`build_assignments`.`id`'
    printf ' SET `build_assignments`.`is_broken`=1, `build_slaves`.`currently_building`=NULL'
    printf ' WHERE `build_slaves`.`name`=from_base64("%s");\n' \
      "$(
        printf '%s' "${slave}" | \
          base64 -w0
      )"
  } | \
    ${mysql_command}

  # shellcheck disable=SC2154
  sed -i '
    /^'"$(str_to_regex "${slave}")"'$/d
  ' "${work_dir}/package-states/$1.$2.$3.$4.locked"
  if [ ! -s "${work_dir}/package-states/$1.$2.$3.$4.locked" ]; then
    rm "${work_dir}/package-states/$1.$2.$3.$4.locked"

    # unlock every loop this package would have broken and which is not
    # broken by another locked package
    locked_packages=$(
      find "${work_dir}/package-states/" -maxdepth 1 -name '*.locked' -printf '%f\n' | \
        sed 's@^\(.\+\)\.\([0-9a-f]\{40\}\.\)\{2\}[^.]\+\.locked$@\1@'
    )
    find "${work_dir}/build-list.loops" -maxdepth 1 -regextype grep \
      -regex '.*/loop_[0-9]\+' \
      -exec grep -qxF "$1" '{}' \; \
      -not -exec grep -qxF "${locked_packages}" '{}' \; \
      -exec rm '{}.locked' \;

    # move that build order to the end of the build-list
    sed -i '
      /^'"$(str_to_regex "$1 $2 $3 $4")"'$/ {
        $ b
        d
      }
      $ a '"$1 $2 $3 $4" \
      "${work_dir}/build-list"
  fi

  # release lock on build-list - otherwise seed-build-list won't run
  flock -u 9

  if ! ${was_broken_before}; then

    haskell_rebuild_packages=$(
      find "${build_log_directory}/error" -type f \
        -name "$1.$2.$3.$4.*.build-log.gz" \
        -exec zgrep -qFx '    The following packages are broken because other packages they depend on are missing. These broken packages must be rebuilt before they can be used.' {} \; \
        -exec zcat {} \; | \
        sed -n '
          s/^installed package \(.*\) is broken due to missing package .*$/\1/
          T
          p
        ' | \
        tr ' ' '\n' | \
        sed '
          s/^/-p ^haskell-/
          s/-[0-9.]\+$/\$/
        ' | \
        sort -u
    )

    rescheduled_packages=$(
      if [ -n "${haskell_rebuild_packages}" ]; then
        # shellcheck disable=SC2086
        "${base_dir}/bin/seed-build-list" ${haskell_rebuild_packages} | \
          sed 's/ .*$//'
      fi
    )

    if [ -p "${irc_dir}/#archlinux-ports/in" ]; then
      {
        printf '%s is broken (says %s).' \
          "$1" \
          "${slave}"
        if [ -n "${rescheduled_packages}" ]; then
          printf -- ' - I rescheduled:'
          # shellcheck disable=SC2086
          printf ' %s,' ${rescheduled_packages} | \
            sed 's/,$/./'
        fi
        printf '\n'
      } | tee /dev/stderr > \
        "${irc_dir}/#archlinux-ports/in"
        # why do we need tee there in order for the redirection to work???
    fi
  fi

  exit 0

fi

# the build was successful on the build slave

# so we also need a lock on the package database

exec 7> "${package_database_lock_file}"
if ! flock -n 7; then
  >&2 echo 'come back (shortly) later - I cannot lock package database.'
  exit 1
fi

clean_up_lock_file() {
  rm -f "${build_list_lock_file}"
  rm -f "${package_database_lock_file}"
}

if ! grep -qxF "$1 $2 $3 $4" "${work_dir}/build-list" ||
  ! [ -f "${work_dir}/package-states/$1.$2.$3.$4.locked" ] ||
  ! [ "$5" = "$(next_sub_pkgrel "$1" "$2" "$3" "$4")" ]; then
  >&2 echo 'Sorry, the sent package is outdated.'
  exit 2
fi

# shellcheck disable=SC2154
if ! grep -qxF "${slave}" "${work_dir}/package-states/$1.$2.$3.$4.locked"; then
  >&2 echo 'Whoops, this package is not built by this slave.'
  exit 2
fi

clean_up_tmp_dir() {
  cd "${base_dir}"
  rm -rf --one-file-system "${tmp_dir}"
  clean_up_lock_file
}

tmp_dir=$(mktemp -d "${work_dir}/tmp.return-assignment.XXXXXXXXXX")
cd "${tmp_dir}"
trap clean_up_tmp_dir EXIT

# extract package(s)
tar -x \
  --wildcards \
  --no-wildcards-match-slash \
  '*.pkg.tar.xz' \
  '*.pkg.tar.xz.sig' \
  '*.pkg.tar.xz-namcap.log.gz'

# check if all packages are signed and all signatures belong to a package
missing_files=$(
  find . -maxdepth 1 -name '*.pkg.tar.xz' -o -name '*.pkg.tar.xz.sig' -o -name '*.pkg.tar.xz-namcap.log.gz' | \
    sed '
      s@\.sig$@ signature@
      t
      s@-namcap\.log\.gz$@ namcap@
      t
      s@$@ package@
    ' | \
    sort -k1,1 -k2,2 | \
    sed '
      :a
        $!N
        s/^\(\(\S\+\) [^\n]\+\)\n\2 /\1 /
        ta
      P
      D
    ' | \
    sed -n '
      s/$/ /
      / package /!{
        h
        s/^\(\S\+\) .*$/Package "\1" is missing./
        p
        g
      }
      / signature /!{
        h
        s/^\(\S\+\) .*$/Signature of "\1" is missing./
        p
        g
      }
      / namcap /!{
        h
        s/^\(\S\+\) .*$/Namcap log of "\1" is missing./
        p
        g
      }
    '
)

if [ -n "${missing_files}" ]; then
  >&2 echo 'The following packages lack a signature, namcap log or package file:'
  >&2 echo "${missing_files}"
  exit 3
fi

# check if the signatures are valid
signatures=$(
  find . -maxdepth 1 -name '*.pkg.tar.xz' \
    -printf 'package file %f\n' \
    -exec gpg --batch --status-fd 1 -q --homedir /etc/pacman.d/gnupg --verify '{}.sig' '{}' \; 2> /dev/null
)
if [ -z "$(
  echo "${signatures}" | \
    cut -d' ' -f2 | \
    grep -x 'file\|TRUST_FULLY' | \
    sort | \
    uniq -c | \
    awk '{print $1}' | \
    uniq -d
)" ]; then
  >&2 echo 'Signature(s) is/are not fully trusted:'
  >&2 echo "${signatures}"
  exit 3
fi

# check if the sent packages are the expected ones
packages=$(
  find . -maxdepth 1 -name '*.pkg.tar.xz' -printf '%f\n'
)
package_errors=$(
  {
    # shellcheck disable=SC2086
    printf '%s\n' ${packages} | \
      sed '
        s@\(-[^-]\+\)\{2\}-\([^-]\+\)\.pkg\.tar\.xz$@ \2@
        / any$/{
          s|any$|i686|
        }
        s|^|was_built: |
      '
    sed '
      s|$| i686|
      s|^|expected: |
    ' "${work_dir}/package-infos/$1.$2.$3.$4.packages"
  } | \
    sort -k2 | \
    uniq -u -f1
)

if [ -n "${package_errors}" ]; then
  >&2 echo 'The following packages should have been built but are missing or vice versa:'
  >&2 echo "${package_errors}"
  exit 4
fi

# move namcap.logs
find . -maxdepth 1 -name '*.pkg.tar.xz-namcap.log.gz' -execdir mv '{}' "${build_log_directory}/success/" \;

# move packages
destination=$(official_or_community "$1.$2.$3.$4" 'staging')

${master_mirror_rsync_command} \
  "${master_mirror_rsync_directory}/i686/${destination}/${destination}.db."* \
  "${master_mirror_rsync_directory}/i686/${destination}/${destination}.files."* \
  .
# shellcheck disable=SC2086
repo-add "${destination}.db.tar.gz" ${packages}
# repo-add -v -s -k "${repo_key}" "${destination}.db.tar.gz" ${packages}

${master_mirror_rsync_command} \
  "${destination}.db."* \
  "${destination}.files."* \
  ./*".pkg.tar.xz" \
  ./*".pkg.tar.xz.sig" \
  "${master_mirror_rsync_directory}/i686/${destination}/"

trigger_mirror_refreshs

for package in ${packages}; do
  remove_old_package_versions 'i686' "${destination}" "${package}"
done

# remove old state files (these should be only "done" markers, but
# actually we don't care what it is) - as long as it's not "testing" or "tested"
find "${work_dir}/package-states" -maxdepth 1 -regextype grep \
  -not -name '*.testing' \
  -not -name '*.tested' \
  -regex '.*/'"$(str_to_regex "$1")"'\(\.[^.]\+\)\{4\}' \
  -not -regex '.*/'"$(str_to_regex "$1.$2.$3.$4")"'\.[^.]\+' \
  -exec rm '{}' \;

# remove all loops which are broken by this package
find "${work_dir}/build-list.loops" -maxdepth 1 -regextype grep \
  -regex '.*/loop_[0-9]\+' \
  -exec grep -qxF "$1" '{}' \; \
  -exec rm '{}.locked' \;

# remove package from build list
sed -i "/^$(str_to_regex "$1 $2 $3 $4")\$/d" "${work_dir}/build-list"

# remove package lock file
if ! [ "${destination}" = 'build-support' ]; then
  # shellcheck disable=SC2086
  printf '%s\n' ${packages} > \
    "${work_dir}/package-states/$1.$2.$3.$4.done"
fi
# shellcheck disable=SC2016
{
  printf 'UPDATE `build_assignments`'
  printf ' JOIN `build_slaves` ON `build_slaves`.`currently_building`=`build_assignments`.`id`'
  printf ' JOIN `binary_packages` ON `binary_packages`.`build_assignment`=`build_assignments`.`id`'
  printf ' SET'
  printf ' `build_assignments`.`is_broken`=0,'
  printf ' `build_slaves`.`currently_building`=NULL,'
  printf ' `binary_packages`.`repository`=(SELECT `repositories`.`id` FROM `repositories` WHERE `repositories`.`name`=from_base64("%s")),' \
    "$(
      printf '%s' "${destination}" | \
        base64 -w0
    )"
  printf ' `binary_packages`.`has_issues`=0,'
  printf ' `binary_packages`.`is_tested`=0'
  printf ' WHERE `build_slaves`.`name`=from_base64("%s");\n' \
    "$(
      printf '%s' "${slave}" | \
        base64 -w0
    )"
} | \
  ${mysql_command}
rm -f \
  "${work_dir}/package-states/$1.$2.$3.$4.locked" \
  "${work_dir}/package-states/$1.$2.$3.$4.broken"