#!/bin/sh

# report about status of build master

# TODO: silence crontab if buildmaster is not sane

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

usage() {
  >&2 echo ''
  >&2 echo 'build-master-status: report about status of build master'
  >&2 echo ''
  >&2 echo 'possible options:'
  >&2 echo '  -w|--web:'
  >&2 echo '    Output to webserver instead of stdout.'
  >&2 echo '  -h|--help:'
  >&2 echo '    Show this help and exit.'
  [ -z "$1" ] && exit 1 || exit "$1"
}

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

web=false

while true
do
  case "$1" in
    -h|--help)
      usage 0
    ;;
    -w|--web)
      web=true
    ;;
    --)
      shift
      break
    ;;
    *)
      >&2 echo 'Whoops, forgot to implement option "'"$1"'" internally.'
      exit 42
    ;;
  esac
  shift
done

if [ $# -ne 0 ]; then
  >&2 echo 'Too many arguments.'
  usage
fi

tmp_dir=$(mktemp -d)
trap 'rm -rf --one-file-system "${tmp_dir}"' EXIT

stable=$(
  ls_master_mirror 'i686' | \
    grep -v 'testing$\|staging$\|-unstable$' | \
    while read -r dir; do
      ls_master_mirror "i686/${dir}"
    done | \
    grep -c '\.pkg\.tar\.xz$'
)
tasks=$(
  grep -c '^\S\+ \S\+ \S\+ \S\+$' \
    "${work_dir}/build-list"
) || true
pending_packages=$(
  grep '^\S\+ \S\+ \S\+ \S\+$' "${work_dir}/build-list" | \
    tr ' ' '.' | \
    while read -r package; do
      generate_package_metadata "${package}" 2>&1 > /dev/null
      cat "${work_dir}/package-infos/${package}.packages"
    done |
    wc -l
)
next_tasks=$(
  {
    cat "${work_dir}/build-list"
    find "${work_dir}/package-states" -maxdepth 1 -name '*.broken' -printf '%f\n' | \
      sed '
        s|\.\([^.]\+\)\.\([^.]\+\)\.\([^.]\+\)\.[^.]\+$| \1 \2 \3|
        p
      '
  } | \
    sort | \
    uniq -u | \
    while read -r package git_revision mod_git_revision repository; do
      if [ -z "$(find_dependencies_on_build_list "${package}" "${git_revision}" "${mod_git_revision}" "${repository}")" ]; then
        echo "${package}" "${git_revision}" "${mod_git_revision}" "${repository}"
      fi
    done | \
    wc -l
)
staging=$(
  ls_master_mirror 'i686' | \
    grep 'staging$' | \
    while read -r dir; do
      ls_master_mirror "i686/${dir}"
    done | \
    grep -c '\.pkg\.tar\.xz$'
) || true
testing=$(
  ls_master_mirror 'i686' | \
    grep 'testing$' | \
    while read -r dir; do
      ls_master_mirror "i686/${dir}"
    done | \
    grep -c '\.pkg\.tar\.xz$'
) || true
{
  find "${work_dir}/package-states/" -maxdepth 1 -name '*.broken' -printf '%f\n' | \
    sed 's|\.\([^.]\+\)\.\([^.]\+\)\.\([^.]\+\)\.[^.]\+$| \1 \2 \3|' | \
    while read -r pkg rev mod_rev repo; do
      if [ -z "$(find_dependencies_on_build_list "${pkg}" "${rev}" "${mod_rev}" "${repo}")" ]; then
        echo "${pkg}"
      fi
    done
  {
    find "${work_dir}/build-list.loops" -maxdepth 1 -regextype grep \
      -regex '.*/loop_[0-9]\+' \
      -exec cat '{}' \; | \
      sort -u
    find "${work_dir}/package-states/" -maxdepth 1 -name '*.broken' -printf '%f\n' | \
      sed 's|\(\.[^.]\+\)\{4\}||' | \
      sort -u
  } | \
    sort | \
    uniq -d
} | \
  sort -u > \
  "${tmp_dir}/broken-packages-names"
broken=$(
  wc -l < \
    "${tmp_dir}/broken-packages-names"
)
blocked=$(
  find "${work_dir}/package-states/" -maxdepth 1 -name '*.blocked' | \
    wc -l
)
locked=$(
  find "${work_dir}/package-states/" -maxdepth 1 -name '*.locked' | \
    wc -l
)
loops=$(
  find "${work_dir}/build-list.loops" -maxdepth 1 -regextype grep \
    -regex '.*/loop_[0-9]\+' | \
    wc -l
)
looped_packages=$(
  find "${work_dir}/build-list.loops" -maxdepth 1 -regextype grep \
    -regex '.*/loop_[0-9]\+' \
    -exec cat '{}' \; | \
    sort -u | \
    wc -l
)

{
  printf 'The mirror master contains %d stable packages (vs. ca. %d planned).\n' \
    "${stable}" \
    "$((staging+testing+pending_packages))"
  printf 'The build list contains %d tasks (incl. broken: %d, leading to %d packages), of which %s can be built immediately.\n' \
    "$((tasks-broken))" \
    "${tasks}" \
    "${pending_packages}" \
    "${next_tasks}"
  printf 'There are %d testing and %d staging packages.\n' \
    "${testing}" \
    "${staging}"
  printf 'There are %d broken package builds.\n' \
    "${broken}"
  if [ "${loops}" -ne 0 ]; then
    printf 'There are %d loops containing %d package builds.\n' \
      "${loops}" \
      "${looped_packages}"
  fi
  if [ $((broken+testing+staging)) -ne 0 ]; then
    printf '%.1f%% of all packages are broken.\n' \
      "$(
        echo "scale=10; 100*${broken}/(${broken}+${testing}+${staging})" | \
          bc
      )"
  fi
  if [ $((testing+staging+pending_packages-broken)) -ne 0 ]; then
    printf '%.1f%% of the planned work has been done.\n' \
      "$(
        echo "scale=10; 100*(${testing}+${staging})/(${testing}+${staging}+${pending_packages}-${broken})" | \
          bc
      )"
  fi
} > \
  "${tmp_dir}/build-master-status.html"

if ${web}; then
  "${base_dir}/bin/calculate-dependent-packages"
  {
    printf '%s\n' \
      '<html>' \
      '<head>' \
      '<title>Status of archlinux32 build master</title>' \
      '<link rel="stylesheet" type="text/css" href="/static/style.css">' \
      '</head>' \
      '<body>'
    sed 's|$|<br>|' "${tmp_dir}/build-master-status.html"
    printf '%s\n' \
      '<br>' \
      'currently building packages:<br>' \
      '<table>'
    printf '<tr>'
    printf '<th>%s</th>' \
      'since (UTC)' \
      'pkgname' \
      'git revision' \
      'modification git revision' \
      'package repository' \
      'build slave'
    printf '</tr>'
    find "${work_dir}/package-states" -maxdepth 1 -name '*.locked' -printf '%T@ <tr><td>%TY-%Tm-%Td %TH:%TM</td><td>%f ' -execdir head -n1 {} \; | \
      sort -k1n,1 | \
      sed '
        s|^\S\+ ||
        s|$|</td></tr>|
        s|\.locked |</td><td>|
        s|\.\([^.]\+\)$|</td><td>\1|
        s|\.\([^.]\+\)$|</td><td>\1|
        s|\.\([^.]\+\)$|</td><td>\1|
      '
    printf '%s\n' \
      '</table>' \
      '</body>' \
      '</html>'
  } | \
    sponge "${tmp_dir}/build-master-status.html"
  end=$(($(date +%s)-7*24*60*60))
  {
    [ -f "${webserver_directory}/statistics" ] && \
      cat "${webserver_directory}/statistics"
    printf '%s ' \
      "$(date +%s)" \
      "${stable}" \
      "${tasks}" \
      "${pending_packages}" \
      "${staging}" \
      "${testing}" \
      "${broken}" \
      "${loops}" \
      "${looped_packages}" \
      "${locked}" \
      "${blocked}" \
      "${next_tasks}" | \
      sed 's| $|\n|'
    echo "${end}"
  } | \
    sort -k1nr,1 | \
    sed -n "
      /^${end}\$/q
      p
    " | \
    tac > \
    "${tmp_dir}/statistics"

  find "${build_log_directory}/error" -maxdepth 1 -type f -name '*.build-log.gz' \( \
    \( \
      -exec zgrep -q '^==> ERROR: A failure occurred in build()\.$' {} \; \
      -printf '%f build()\n' \
    \) -o \
    \( \
      -exec zgrep -q '^==> ERROR: A failure occurred in check()\.$' {} \; \
      -printf '%f check()\n' \
    \) -o \
    \( \
      -exec zgrep -q '^==> ERROR: Could not download sources\.$' {} \; \
      -printf '%f source\n' \
    \) -o \
    \( \
      -exec zgrep -q 'error: failed to commit transaction (invalid or corrupted package)$' {} \; \
      -printf '%f package-cache\n' \
    \) -o \
    -printf '%f unknown\n' \
    \) | \
    sed '
      s|\(\.[^.]\+\)\{3\} | |
    ' | \
    sort -u | \
    sed '
      :a
        $!N
        s/^\(\S\+\) \([^\n]\+\)\n\1 /\1 \2,/
      ta
      P
      D
    ' | \
    sort -k1,1 > \
    "${tmp_dir}/broken-packages.reason"

  {
    printf '%s\n' \
      '<html>' \
      '<head>' \
      '<title>List of broken package builds</title>' \
      '<link rel="stylesheet" type="text/css" href="/static/style.css">' \
      '</head>' \
      '<body>' \
      '<a href="build-logs/">build logs</a><br>' \
      '<table>' \
      '<tr>'
    printf '<th>%s</th>' \
      'package' \
      'git revision' \
      'modification git revision' \
      'package repository' \
      'compilations' \
      'dependent' \
      'build error' \
      'blocked'
    printf '</tr>\n'
    find "${work_dir}/package-states" -maxdepth 1 -name '*.broken' -printf '%f\n' | \
      sed 's|\.broken$||' | \
      sort -k1,1 | \
      join -j 1 - "${tmp_dir}/broken-packages.reason" | \
      sed 's|^\(\(.\+\)\.\([^.]\+\)\.\([^.]\+\)\.\([^.]\+\)\) \(\S\+\)$|\1 \2 \3 \4 \5 \6|' | \
      while read -r sf pkg rev mod_rev repo build_error; do
        if grep -qxF "${pkg}" "${tmp_dir}/broken-packages-names"; then
          printf '1 '
        else
          printf '0 '
        fi
        printf '%s ' \
          "${pkg}" \
          "${rev}" \
          "${mod_rev}" \
          "${repo}" \
          "$(wc -l < "${work_dir}/package-states/${sf}.broken")" \
          "$(
            # shellcheck disable=SC2010
            ls -t "${webserver_directory}/build-logs/error" | \
              grep -m1 "^$(str_to_regex "${sf}.")[^.]\+\.build-log\.gz\$"
          )" \
          "$(
            {
              grep -m1 "^$(str_to_regex "${sf}") " "${work_dir}/dependent-count" || \
                echo 'x &nbsp;'
            } | \
              cut -d' ' -f2
          )" \
          "${build_error}"
        if [ -f "${work_dir}/package-states/${sf}.blocked" ]; then
          while read -r blocked_reason; do
            if echo "${blocked_reason}" | \
              grep -q '^wait for '; then
              printf 'wait for '
              echo "${blocked_reason}" | \
                sed '
                  s|^wait for ||
                  s@\( and \| or \)@\n\1\n@
                ' | \
                while read -r reason; do
                  if [ "FS#${reason#FS#}" = "${reason}" ]; then
                    printf '<a href="https://bugs.archlinux.org/task/%s">%s</a>' \
                      "${reason#FS#}" \
                      "${reason}"
                  elif grep -q "^$(str_to_regex "${reason}") " "${work_dir}/build-list"; then
                    printf '<a href="graphs/%s.png">%s</a>' \
                      "${reason}" \
                      "${reason}"
                  elif [ "${reason% *}" != "${reason}" ]; then
                    printf '%s' \
                      "${reason}"
                  else
                    printf '<font color="red">%s</font>' \
                      "${reason}"
                  fi
                  if read -r operator; then
                    printf ' %s ' "${operator}"
                  fi
                done
            else
              echo "${blocked_reason}"
            fi
          done < \
            "${work_dir}/package-states/${sf}.blocked" | \
            tr '\n' ' '
        else
          printf '&nbsp;'
        fi
        printf '\n'
      done | \
      sort -k6n,6 | \
      while read -r buildable pkg rev mod_rev repo count log_file dependent build_error reason; do
        if [ "${buildable}" -eq 0 ]; then
          left='('
          right=')'
        else
          unset left
          unset right
        fi
        printf '<tr>'
        if git -C "${repo_paths__archlinux32}" archive "${mod_rev}" -- "${repo}/${pkg}/PKGBUILD" > /dev/null 2>&1; then
          mod_rev="<a href=\"https://github.com/archlinux32/packages/tree/${mod_rev}/${repo}/${pkg}\">${mod_rev}</a>"
        fi
        build_error=$(
          echo "${build_error}" | \
            sed 's|,|, |g'
        )
        printf '<td>%s</td>' \
          '<a href="graphs/'"${pkg}"'.png">'"${left}${pkg}${right}"'</a>' \
          "<p style=\"font-size:8px\">${rev}</p>" \
          "<p style=\"font-size:8px\">${mod_rev}</p>" \
          "${repo}" \
          '<a href="build-logs/error/'"${log_file}"'">'"${count}"'</a>' \
          "${dependent}" \
          "${build_error}" \
          "${reason}"
        printf '</tr>\n'
      done
    printf '%s\n' \
      '</table>' \
      '</body>' \
      '</html>'
  } > \
    "${tmp_dir}/broken-packages.html"

  rm -f "${tmp_dir}/broken-packages-names" "${tmp_dir}/broken-packages.reason"

  {
    printf '%s\n' \
      '<html>' \
      '<head>' \
      '<title>Todos in the build scripts</title>' \
      '</head>' \
      '<body>'
    find "${base_dir}/bin/" "${base_dir}/conf/" -type f \
      -exec sed -n '
        /^\s*#\s*TODO:/{
          s/^\s*#\s*TODO:\s*//
          :a
            N
            s/\s*\n\s*#/\n/
            ta
          s/\n\n\+/\n/g
          s/\n[^\n]*$/\n/
          i {}
          =
          p
        }' {} \; | \
      sed '
        :a
        N
        /\n$/!ba
        s|^[^\n]*/\([^/\n]\+/[^/\n]\+\)\n\([0-9]\+\)\n|\1 (line \2):\n|
      ' | \
      sed '
        s|$|<br>|
      '
    printf '%s\n' \
      '</body>' \
      '</html>'
  } > \
    "${tmp_dir}/todos.html"

  {
    printf '%s\n' \
      '<html>' \
      '<head>' \
      '<title>Blacklisted packages</title>' \
      '<link rel="stylesheet" type="text/css" href="/static/style.css">' \
      '</head>' \
      '<body>' \
      '<table>'
    printf '<tr>'
    printf '<th>%s</th>' \
      'package' \
      'reason'
    printf '</tr>\n'
    git -C "${repo_paths__archlinux32}" archive "$(cat "${work_dir}/archlinux32.revision")" -- 'blacklist' | \
      tar -Ox | \
      sed '
        s@FS#\([0-9]\+\)@<a href="https://bugs.archlinux.org/task/\1">\0</a>@
        /.#/!s/$/#/
        s|\(.\)#|\1</td><td>|
        /^\s*#/{
          s/^\s*#\s*//
          s|\s*\(</td><td>\)|</font></s>\1|
          s/^/<s><font color="#808080">/
        }
        s|^|<tr><td>|
        s|$|</td></tr>|
      '
    printf '%s\n' \
      '</table>' \
      '</body>' \
      '</html>'
  } > \
    "${tmp_dir}/blacklist.html"

  find "${tmp_dir}" -maxdepth 1 -type f | \
    while read -r file; do
      cat "${file}" > \
        "${webserver_directory}/${file##*/}"
    done

else
  cat "${tmp_dir}/build-master-status.html"
fi