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#!/bin/sh

# shellcheck disable=SC2119

# shellcheck source=../lib/load-configuration
. "${0%/*}/../lib/load-configuration"

# this script shall host all the tests that are too slow to be run on
# the buildmaster (thus, it runs asynchronously and must therefor be
# resilient against transient states of the buildmaster):
# - check sanity of git
# TODO:
# - check for differences of dependencies between mysql and git
# - check for differences of dependencies between mysql and packages
# - check for installability of packages

if [ $# -eq 1 ] && [ "x$1" = 'x-n' ]; then
  >&2 echo 'not joining irc'
  irc=false
  shift
else
  irc=true
fi

if [ $# -ne 0 ]; then
  >&2 echo 'usage: nit-picker [-n]'
  >&2 echo '  -n: do not join irc'
  exit 1
fi

clean_up() {
  rm -rf --one-file-system "${tmp_dir}"
}

tmp_dir=$(mktemp -d 'tmp.nit-picker.XXXXXXXXXX' --tmpdir)
trap 'clean_up' EXIT

if ${irc}; then
  if pgrep -x ii; then
    >&2 echo 'ii is already running - this will not work'
    exit 1
  fi

  rm -rf --one-file-system "${irc_dir}"

  ii -s irc.freenode.net -n nit-picker -f nit-picker >/dev/null 2>&1 &
  ii_pid=$!

  clean_up() {
    rm -rf --one-file-system "${tmp_dir}"
    kill "${ii_pid}"
  }

  # wait for nickserv complaint
  while ! grep -qF 'This nickname is registered. Please choose a different nickname' "${irc_dir}/nickserv/out"; do
    sleep 1
  done

  # register
  printf 'identify %s\n' "${irc_password}" | \
    sponge "${irc_dir}/nickserv/in"

  # wait for registering to succeed
  while ! grep -qF 'You are now identified for' "${irc_dir}/nickserv/out"; do
    sleep 1
  done

  # join channel
  echo '/j #archlinux32' | \
    sponge "${irc_dir}/in"

  while [ ! -f "${irc_dir}/#archlinux32/out" ]; do
    sleep 1
  done
else
  irc_say() {
    sed 's/^/irc: /'
  }
fi

mysql_load_min_and_max_versions

while pgrep -x ii >/dev/null \
|| ! ${irc}; do
  # shellcheck disable=SC2016
  {
    printf 'SELECT DISTINCT'
    printf ' "commit",'
    printf '`git_repositories`.`name`,'
    printf '`package_sources`.`git_revision`'
    printf ' FROM `package_sources`'
    mysql_join_package_sources_upstream_repositories
    mysql_join_upstream_repositories_git_repositories
    printf ';\n'

    printf 'SELECT DISTINCT'
    printf ' "commit",'
    printf '"archlinux32",'
    printf '`package_sources`.`mod_git_revision`'
    printf ' FROM `package_sources`'
    printf ';\n'

    printf 'SELECT DISTINCT'
    printf ' "binary-dependencies",'
    mysql_package_name_query
    printf ' FROM `binary_packages`'
    mysql_join_binary_packages_architectures
    mysql_join_binary_packages_binary_packages_in_repositories
    mysql_join_binary_packages_in_repositories_repositories
    printf ' WHERE `repositories`.`is_on_master_mirror`'
    printf ';\n'
  } | \
    mysql_run_query | \
    tr '\t' ' ' | \
    shuf | \
    while read -r action parameters; do
      if ! pgrep -x ii >/dev/null; then
        break
      fi
      case "${action}" in
        'commit') # check whether a given commit is present in the git repo
          git_repo="${parameters%% *}"
          git_rev="${parameters#${git_repo} }"
          eval "$(
            printf 'git_dir="${repo_paths__%s}"\n' \
              "${git_repo}"
          )"
          # shellcheck disable=SC2154
          if ! git -C "${git_dir}" cat-file -t "${git_rev}" 2> /dev/null | \
            grep -qxF 'commit'; then
            git -C "${git_dir}" fetch --all -p >/dev/null 2>&1
            if ! git -C "${git_dir}" cat-file -t "${git_rev}" 2> /dev/null | \
              grep -qxF 'commit'; then
              printf 'commit %s is missing from repository %s\n' \
                "${git_rev}" \
                "${git_repo}" \
              | irc_say
            fi
          fi
        ;;
        'binary-dependencies')
          ${master_mirror_rsync_command} \
            "${master_mirror_rsync_directory}/pool/${parameters}" \
            "${tmp_dir}/"
          bsdtar -Oxf "${tmp_dir}/${parameters}" '.PKGINFO' \
          | sed -n '
            s/^\(\(make\)\?depend\) = /\1 /
            T
            p
          ' \
          | sed '
            s/\(=\|[<>]=\?\)\(\S\+\)$/ \1 \2/
            t
            s/$/ >= '"${min_version}"'/
          ' \
          | sed '
            s/:\(\S\+\)$/ \1/
            t
            s/ \(\S\+\)$/ 0 \1/
          ' \
          | sort -u \
          > "${tmp_dir}/pkg-deps"
          {
            printf 'SELECT'
            printf ' IF(`dependency_types`.`name`="run","depend","makedepend"),'
            printf '`install_targets`.`name`,'
            printf '`dependencies`.`version_relation`,'
            printf '`versions`.`epoch`,'
            printf '`versions`.`version`'
            printf ' FROM `binary_packages`'
            mysql_join_binary_packages_dependencies
            mysql_join_binary_packages_architectures
            mysql_join_dependencies_dependency_types
            mysql_join_dependencies_versions
            mysql_join_dependencies_install_targets
            printf ' WHERE '
            mysql_package_name_query
            printf '="%s"' \
              "${parameters}"
            printf ' AND `dependency_types`.`name` IN ("run","make")'
            printf ';\n'
          } \
          | mysql_run_query \
          | tr '\t' ' ' \
          | sed '
            /^depend base >= '"${min_version%:*}"' '"${min_version#*:}"'$/d
            /^makedepend base-devel >= '"${min_version%:*}"' '"${min_version#*:}"'$/d
          ' \
          | sort -u \
          > "${tmp_dir}/db-deps"
          if ! diff -q "${tmp_dir}/db-deps" "${tmp_dir}/pkg-deps"; then
            printf 'dependencies of %s differ between the package and our database\n' \
              "${parameters}" \
            | irc_say 'deep42thought'
            if ! ${irc}; then
              diff -u --color "${tmp_dir}/db-deps" "${tmp_dir}/pkg-deps" || true
            fi
            sleep 60
          fi
          rm \
            "${tmp_dir}/${parameters}" \
            "${tmp_dir}/db-deps" \
            "${tmp_dir}/pkg-deps"
        ;;
        *)
          >&2 printf 'action "%s" is not yet implemented ...\n' "${action}"
        ;;
      esac
    done
  sleep 120
done