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path: root/bin/db-update
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#!/bin/bash

# move binary packages from staging to testing (if possible [1]) and
# additionally all packages specified on the command line from testing
# to the respective stable repository

# 1] Condition for moving a package A from staging to testing is that:
#   a) nothing on the build-list depends on A and
#   b) no done package B which is not being moved depends on A

# TODO:
#  the meta data used to evaluate condition "b" might be for a different
#    version
#  correctly handle if multiple versions of a single package are marked
#    as "done"

. "${0%/*}/../conf/default.conf"

usage() {
  >&2 echo ''
  >&2 echo 'db-update [options] [packages]:'
  >&2 echo ' move possible packages from staging to testing.'
  >&2 echo ' move packages on the command line from testing to stable.'
  >&2 echo ''
  >&2 echo 'possible options:'
  >&2 echo '  -b|--block:   If necessary, wait for lock blocking.'
  >&2 echo '  -h|--help:    Show this help and exit.'
  [ -z "$1" ] && exit 1 || exit $1
}

eval set -- "$(
  getopt -o bh \
    --long block \
    --long help \
    -n "$(basename "$0")" -- "$@" || \
  echo usage
)"

block_flag='-n'

while true
do
  case "$1" in
    -b|--block)
      block_flag=''
    ;;
    -h|--help)
      usage 0
    ;;
    --)
      shift
      break
    ;;
    *)
      >&2 echo 'Whoops, forgot to implement option "'"$1"'" internally.'
      exit -1
    ;;
  esac
  shift
done

packages_to_stabilize=("${@}")

# Create a lock file and a trap.

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

exec 8> "${package_database_lock_file}"
if ! flock ${block_flag} 8; then
  >&2 echo 'come back (shortly) later - I cannot lock package database.'
  exit 1
fi

function clean_up_lock_file {
  rm -f "${package_database_lock_file}" "${build_list_lock_file}"
}

trap clean_up_lock_file EXIT

# packages which can't be un-staged because they're still dependencies
# of any job on the build-list

keep_packages="$(
  while read -r pkg pkg_rev mod_rev repo; do
    cat "${work_dir}/package-infos/${pkg}.${pkg_rev}.${mod_rev}.depends"
  done < \
    "${work_dir}/build-list" | \
    sort -u
)"

# sanity check

if [ -n "$(
  ls "${work_dir}/package-states" | \
    grep '\.done$' | \
    sed 's|\(\.[^.]\+\)\{4\}$||' | \
    sort | \
    uniq -d)" ]; then
  >&2 echo 'Removing duplicates not yet implemented!'
  exit 42
fi

# packages which are done

done_packages="$(
  ls "${work_dir}/package-states" | \
    grep '\.done$' | \
    sed 's|^\(.*\)\(\(\.[^.]\+\)\{3\}\)\.done$|\1 \1\2|' | \
    sort
)"

# remove packages not yet done from keep-packages list

keep_packages="$(
  join -1 1 -2 1 -o 2.2 \
    <(
      echo "${keep_packages}"
    ) \
    <(
      echo "${done_packages}"
    )
)"

# packages which can't be unstaged

new_keep_packages="${keep_packages}"
keep_packages=''

while [ -n "${new_keep_packages}" ]; do

  for package in ${new_keep_packages}; do
    if [ ! -f "${work_dir}/package-infos/${package%.*}.depends" ]; then
      echo "missing meta data for an not unstageable package ('${package}') - abort unstaging!"
      keep_packages=''
      done_packages=''
      break
    fi
  done
  if [ -z "${done_packages}" ]; then
    break
  fi

  keep_packages="$(
    printf '%s\n' "${keep_packages}" "${new_keep_packages}" | \
      sort -u | \
      grep -v '^$'
  )"

  new_keep_packages="$(
    join -1 1 -2 1 -o 2.2 \
      <(
        echo "${new_keep_packages}" | \
          while read -r package; do
            cat "${work_dir}/package-infos/${package%.*}.depends"
          done | \
          sort -u
      ) \
      <(
        echo "${done_packages}"
      )
  )"

  # "new" is only what has not been there before
  new_keep_packages="$(
    printf '%s\n' "${keep_packages}" "${keep_packages}" "${new_keep_packages}" | \
      sort | \
      uniq -u
  )"

done

# unlock build list

rm -f "${build_list_lock_file}"
flock -u 9

function clean_up_lock_file {
  rm -f "${package_database_lock_file}"
}

# calculate unstageable packages from keep_packages and done_packages

done_packages="$(
  echo "${done_packages}" | \
    cut -d' ' -f2
)"

done_packages="$(
  (
    printf '%s\n' "${done_packages}" "${keep_packages}"
  ) | \
    sort | \
    uniq -u
)"

unset keep_packages

for package in ${done_packages}; do
  parts=($(cat "${work_dir}/package-states/${package}.done"))
  parts_names=(
    $(
      printf '%s\n' "${parts[@]}" | \
        sed 's|\(-[^-]\+\)\{3\}\.pkg\.tar\.xz$||'
    )
  )
  case "${package##*.}" in
    'community')
      destination='community-testing'
      ;;
    'multilib')
      a32_rev="${package%.*}"
      a32_rev="${a32_rev##*.}"
      if git -C "${repo_paths['archlinux32']}" archive --format=tar "${a32_rev}" | \
        tar -Ox 'extra-from-multilib' | \
        grep -q "^${package%.*.*.*}\$"; then
        destination='testing'
      else
        destination='community-testing'
      fi
      ;;
    *)
      destination='testing'
  esac

  pushd "${master_mirror_directory}/i686/staging" > /dev/null
  mkdir -p "../${destination}"
  repo-remove 'staging.db.tar.gz' "${parts_names[@]}"
  for part in "${parts[@]}"; do
    mv "${part}"{,.sig} "../${destination}/"
  done
  popd > /dev/null
  pushd "${master_mirror_directory}/i686/${destination}" > /dev/null
  repo-add "${destination}.db.tar.gz" "${parts[@]}"
  popd > /dev/null

  mv "${work_dir}/package-states/${package}."{done,testing}
done

# TODO:
#  move packages from packages_to_stabilize from *testing/ to the stable repos