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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#  2: outdated package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

  # shellcheck disable=SC2016
  infos=$(
    {
      printf 'SELECT DISTINCT `build_assignments`.`id`,IF(`build_assignments`.`is_broken`,"true","false") FROM `build_slaves`'
      mysql_join_build_slaves_build_assignments
      mysql_join_build_assignments_package_sources
      mysql_join_package_sources_upstream_repositories
      mysql_join_build_assignments_binary_packages
      mysql_join_binary_packages_repositories
      printf ' WHERE `build_slaves`.`name`=from_base64("%s")' \
        "$(
          # shellcheck disable=SC2154
          printf '%s' "${slave}" | \
            base64 -w0
        )"
      printf ' AND `package_sources`.`%s`=from_base64("%s")' \
        'pkgbase' "$(printf '%s' "$1" | base64 -w0)" \
        'git_revision' "$(printf '%s' "$2" | base64 -w0)" \
        'mod_git_revision' "$(printf '%s' "$3" | base64 -w0)"
      printf ' AND `upstream_repositories`.`name`=from_base64("%s")' \
        "$(printf '%s' "$4" | base64 -w0)"
      printf ' AND `repositories`.`name`="build-list"'
    } | \
      ${mysql_command} --raw --batch | \
      sed '
        1d
        y/\t/ /
      '
  )
  if [ -z "${infos}" ]; then
    >&2 echo 'You do not build this package (anymore) - move on.'
    exit 2
  fi
  was_broken_before="${infos##* }"

  # 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'
  )

  # 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/,$//'
      printf ');\n'
      printf 'INSERT INTO `failures` (`date`,`reason`,`log_file`) VALUES'
      fail_reason_identifiers=$(
        {
          printf 'SELECT `fail_reasons`.`id`,replace(to_base64(`fail_reasons`.`identifier`),"\\n","")'
          printf ' 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/$1.$2.$3.$4.${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' "$1.$2.$3.$4.${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`'
    mysql_join_build_assignments_build_slaves
    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'
      } | \
        sponge "${irc_dir}/#archlinux-ports/in"
    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}"
}

# shellcheck disable=SC2016
if ! {
    printf 'SELECT count(*)'
    printf ' FROM `binary_packages`'
    mysql_join_binary_packages_build_assignments
    mysql_join_build_assignments_build_slaves
    mysql_join_binary_packages_repositories
    mysql_join_build_assignments_package_sources
    mysql_join_package_sources_upstream_repositories
    printf ' WHERE `repositories`.`name`="build-list"'
    printf ' AND `build_slaves`.`name`=from_base64("%s")' \
      "$(printf '%s' "${slave}" | base64 -w0)"
    printf ' AND `package_sources`.`%s`=from_base64("%s")' \
      'pkgbase' "$(printf '%s' "$1" | base64 -w0)" \
      'git_revision' "$(printf '%s' "$2" | base64 -w0)" \
      'mod_git_revision' "$(printf '%s' "$3" | base64 -w0)"
    printf ' AND `upstream_repositories`.`name`=from_base64("%s")' \
      "$(printf '%s' "$4" | base64 -w0)"
    printf ' AND `binary_packages`.`sub_pkgrel`=from_base64("%s");\n' \
      "$(printf '%s' "$5" | base64 -w0)"
  } | \
    ${mysql_command} --raw --batch | \
    sed '1d' | \
    grep -vxF '0'; then
  >&2 echo 'Sorry, the sent package is outdated.'
  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' \
  '*.pkg.tar.xz.so.needs.gz' \
  '*.pkg.tar.xz.so.provides.gz'

# check if all packages come with:
#  - a package file
#  - a signature
#  - a namcap log
#  - a list of needed libraries
#  - a list of provided libraries
missing_files=$(
  find . -maxdepth 1 \( \
    \( \
      -name '*.pkg.tar.xz' \
      -printf '%f package\n' \
    \) -o \
    \( \
      -name '*.pkg.tar.xz.sig' \
      -printf '%f signature\n' \
    \) -o \
    \( \
      -name '*.pkg.tar.xz-namcap.log.gz' \
      -printf '%f namcap\n' \
    \) -o \
    \( \
      -name '*.pkg.tar.xz.so.needs.gz' \
      -printf '%f needed-libraries\n' \
    \) -o \
    \( \
      -name '*.pkg.tar.xz.so.provides.gz' \
      -printf '%f provided-libraries\n' \
    \) \
  \) | \
    sed '
      s/\(\.pkg\.tar\.xz\)\(\.sig\|-namcap\.log\.gz\|\.so\.\(provides\|needs\)\.gz\) /\1 /
    ' | \
    sort -k1,1 -k2,2 | tee /dev/stderr | \
    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
      }
      / needed-libraries /!{
        h
        s/^\(\S\+\) .*$/List of libraries needed by "\1" is missing./
        p
        g
      }
      / provided-libraries /!{
        h
        s/^\(\S\+\) .*$/List of libraries provided by "\1" is missing./
        p
        g
      }
    '
)

if [ -n "${missing_files}" ]; then
  >&2 echo 'The following packages lack a signature, namcap log, package file or list of needed/provided libraries:'
  >&2 echo "${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' ${packages} | \
      sed '
        s|^|was_built: |
      '
    # shellcheck disable=SC2016
    {
      printf 'SELECT CONCAT('
        printf '"expected: ",'
        mysql_package_name_query
      printf ')'
      printf ' FROM `binary_packages`'
      mysql_join_binary_packages_architectures
      mysql_join_binary_packages_build_slaves
      mysql_join_binary_packages_repositories
      printf ' WHERE `build_slaves`.`name`=from_base64("%s")' \
        "$(
          printf '%s' "${slave}" | \
            base64 -w0
        )"
      printf ' AND `repositories`.`name`="build-list"'
      printf ';\n'
    } | \
      ${mysql_command} --raw --batch | \
      sed '
        1d
      '
  } | \
    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/" \;

# insert provided libraries into database
# shellcheck disable=SC2016
{
  printf 'CREATE TEMPORARY TABLE `pl` (`pkgfile` VARCHAR(64), `lib` VARCHAR(64));\n'
  find . -maxdepth 1 -name '*.pkg.tar.xz.so.provides.gz' -execdir zgrep -HF '' '{}' \; | \
    sed -n '
      s,^\./\(.\+\.pkg\.tar\.xz\)\.so\.provides\.gz:\([^:]\+\)$,\1\n\2,
      T
      p
    ' | \
    base64_encode_each | \
    sed '
      N
      s/^\(\S\+\)\n\(\S\+\)$/(from_base64("\1"),from_base64("\2")),/
      $s/,$/;/
      2 s/^/INSERT INTO `pl` (`pkgfile`,`lib`) VALUES /
    '
  # TODO: insert needed libraries into database, too
  printf 'INSERT IGNORE INTO `install_targets` (`name`)'
  printf ' SELECT DISTINCT `pl`.`lib` FROM `pl`;\n';
  printf 'INSERT IGNORE INTO `install_target_providers` (`package`,`install_target`)'
  printf ' SELECT `binary_packages`.`id`,`install_targets`.`id`'
  printf ' FROM `install_targets` JOIN `pl` ON `pl`.`lib`=`install_targets`.`name`'
  printf ' JOIN `binary_packages`'
  mysql_join_binary_packages_architectures
  mysql_join_binary_packages_build_slaves
  mysql_join_binary_packages_repositories
  printf ' WHERE `build_slaves`.`name`=from_base64("%s")' \
    "$(
      printf '%s' "${slave}" | \
        base64 -w0
    )"
  printf ' AND `repositories`.`name`="build-list"'
  printf ' AND '
  mysql_package_name_query
  printf '=`pl`.`pkgfile`'
  printf ';\n'
} | \
  ${mysql_command}

# 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.$4.done"
fi
# shellcheck disable=SC2016
{
  printf 'UPDATE `build_assignments`'
  mysql_join_build_assignments_build_slaves
  mysql_join_build_assignments_binary_packages
  mysql_join_binary_packages_repositories '' 'old_repo'
  printf ' SET'
  printf ' `build_assignments`.`is_broken`=0,'
  printf ' `build_assignments`.`priority`=0,'
  printf ' `binary_packages`.`repository`=(SELECT `new_repo`.`id` FROM `repositories` AS `new_repo` WHERE `new_repo`.`name`=from_base64("%s")),' \
    "$(
      printf '%s' "${destination}" | \
        base64 -w0
    )"
  printf ' `binary_packages`.`has_issues`=0,'
  printf ' `binary_packages`.`is_tested`=0'
  printf ' WHERE `build_slaves`.`name`=from_base64("%s")' \
    "$(
      printf '%s' "${slave}" | \
        base64 -w0
    )"
  printf ' AND `old_repo`.`name`="build-list";\n'
  printf 'UPDATE `build_slaves` AS `to_update`'
  printf ' JOIN `build_slaves` AS `current_slave`'
  printf ' ON `to_update`.`currently_building`=`current_slave`.`currently_building`'
  printf ' SET `to_update`.`currently_building`=NULL'
  printf ' WHERE `current_slave`.`name`=from_base64("%s");\n' \
    "$(
      printf '%s' "${slave}" | \
        base64 -w0
    )"
  printf 'CREATE TEMPORARY TABLE `loops_to_delete` (`loop` MEDIUMINT);\n'
  printf 'INSERT INTO `loops_to_delete`'
  printf ' SELECT `build_dependency_loops`.`loop` FROM `build_dependency_loops`'
  mysql_join_build_dependency_loops_binary_packages
  mysql_join_binary_packages_repositories
  printf ' WHERE NOT `repositories`.`name` = "build-list";\n'
  printf 'DELETE FROM `build_dependency_loops` WHERE EXISTS ('
  printf 'SELECT * FROM `loops_to_delete` WHERE `loops_to_delete`.`loop`=`build_dependency_loops`.`loop`'
  printf ');\n'
  printf 'DROP TABLE `loops_to_delete`;\n'
} | \
  ${mysql_command}
rm -f \
  "${work_dir}/package-states/$1.$2.$3.$4.locked" \
  "${work_dir}/package-states/$1.$2.$3.$4.broken"