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path: root/bin/show-dependencies
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#!/bin/sh

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

# Create a lock file.

if [ $# -eq 0 ]; then
  broken=$(
    ls "${work_dir}/package-states" | \
      grep '\.broken$' | \
      sed 's|\(\.[^.]\+\)\{4\}$||' | \
      sort -u
  )
  new_sum='x'
  sum=''
  tmp_dir=$(mktemp -d)
  trap 'rm -rf --one-file-system "${tmp_dir}"' EXIT
  ls "${work_dir}/package-infos" | \
    grep '\.builds$' | \
    sed "s|^|${work_dir}/package-infos/|" | \
    xargs grep -HF '' | \
    sed '
      s|^.*/||
      s|\(\.[^.]\+\)\{4\}:| |
    ' | \
    sort -k2,2 > \
    "${tmp_dir}/builds"
  while ! [ "${new_sum}" = "${sum}" ]; do
    sum="${new_sum}"
    printf '%s\n' ${broken} | \
      sort > \
      "${tmp_dir}/broken"
    broken=$(
      (
        ls "${work_dir}/package-infos" | \
          grep '\.depends$' | \
          sed 's|^\(.*\)\(\.[^.]\+\)\{4\}|\1 \0|' | \
          sort -k1,1 | \
          join -1 1 -2 1 -o 1.2 - "${tmp_dir}/broken" | \
          sed "s|^|${work_dir}/package-infos/|" | \
          xargs -r cat
      ) | \
        sort -u | \
        join -1 1 -2 2 -o 2.1 - "${tmp_dir}/builds"
    )
    broken=$(
      (
        (
          printf '%s\n' ${broken}
          cat "${tmp_dir}/broken"
        ) | \
          sort -u
        awk '{print $1}' "${work_dir}/build-list" | \
          sort -u
      ) | \
        sort | \
        uniq -d
    )
    new_sum=$(
      printf '%s\n' ${broken} | \
        sha512sum
    )
  done

  rm -rf --one-file-system "${tmp_dir}"
  trap - EXIT
  broken=$(
    (
      printf '%s\n' ${broken}
      (
        ls "${webserver_directory}/graphs" | \
          sed 's|\.png$||'
        (
          awk '{print $1}' < \
            "${work_dir}/build-list"
          cat "${work_dir}/deletion-list"
        ) | \
          sort -u
      ) | \
        sort | \
        uniq -d
    ) | \
      sort -u
  )
  if [ -n "${broken}" ]; then
    "$0" ${broken} || \
      exit $?
  fi
  (
    ls "${webserver_directory}/graphs"
    printf '%s.png\n' ${broken} ${broken}
  ) | \
    sort | \
    uniq -u | \
    sed "s|^|${webserver_directory}/graphs/|" | \
    xargs -r rm
  exit
fi

if ps ax | \
  grep -v grep | \
  grep -v "^\s*$$\s" | \
  grep -wF "$0$(
    printf ' %s' "$@"
  )"; then

  >&2 echo $$
  >&2 echo 'I was running already.'
  exit
fi

exec 9> "${work_dir}/${0##*/}.lock"
if ! flock -n 9; then
  echo 'Cannot get lock.'
  exit
fi

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

sort -u "${work_dir}/build-order" | \
  grep -v '^\(\S\+\) \1$' | \
  grep '^\S\+ \S\+$' > \
  "${tmp_dir}/original-build-order"

sort -k1,1 "${work_dir}/build-list" > \
  "${tmp_dir}/build-list.sorted-by-package"

(
  sort -k1,1 "${tmp_dir}/original-build-order" | \
    join -1 1 -2 1 -o 1.1,1.2 - "${tmp_dir}/build-list.sorted-by-package"
  sort -k2,2 "${tmp_dir}/original-build-order" | \
    join -1 2 -2 1 -o 1.1,1.2 - "${tmp_dir}/build-list.sorted-by-package"
) | \
  sort -u | \
  sponge "${tmp_dir}/original-build-order"

ls "${work_dir}/package-infos" | \
  sed 's|\(\.[^.]\+\)\{4\}$||' | \
  sort -u > \
  "${tmp_dir}/known-packages"

ls "${work_dir}/package-infos" | \
  grep '\.groups$' | \
  while read -r pf; do
    cat "${work_dir}/package-infos/${pf}" | \
      xargs -r printf "${pf%.*.*.*.*} %s\n" >> \
      "${tmp_dir}/known-groups"
  done

ls "${work_dir}/package-infos" | \
  grep '\.packages$' | \
  while read -r pf; do
    grep -vxF "${pf%.*.*.*.*}" "${work_dir}/package-infos/${pf}" | \
      xargs -r printf "${pf%.*.*.*.*} %s\n" >> \
      "${tmp_dir}/known-split-packages"
  done

for target_package in "$@"; do

  output="${webserver_directory}/graphs/${target_package}.png"

  grep " $(str_to_regex "${target_package}")\$" "${tmp_dir}/original-build-order" | \
    sort -u > \
    "${tmp_dir}/build-order"
  printf '0 target-package %s\n' "${target_package}" > \
    "${tmp_dir}/knots"

  last_sum=''
  current_sum=$(sha512sum "${tmp_dir}/build-order")
  while ! [ "${last_sum}" = "${current_sum}" ]; do

    last_sum="${current_sum}"

    awk '{print $1}' "${tmp_dir}/build-order" | \
      sort -u > \
      "${tmp_dir}/new"
    (
      cat \
        "${tmp_dir}/original-build-order" \
        "${tmp_dir}/known-split-packages"
      grep -v ' base\(-devel\)\?$' "${tmp_dir}/known-groups" || \
        true
    ) | \
      sort -k2,2 | \
      join -1 2 -2 1 -o 1.1,1.2 - "${tmp_dir}/new" | \
      sponge -a "${tmp_dir}/build-order"

    sort -u "${tmp_dir}/build-order" | \
      sponge "${tmp_dir}/build-order"

    current_sum=$(sha512sum "${tmp_dir}/build-order")

  done

  tr ' ' '\n' < \
    "${tmp_dir}/build-order" | \
    sort -u | \
    join -j 1 - "${tmp_dir}/build-list.sorted-by-package" | \
    while read pkg rev mod_rev repo; do
      if [ -f "${work_dir}/package-states/${pkg}.${rev}.${mod_rev}.${repo}.broken" ]; then
        printf '1 broken-build-list-package %s\n' "${pkg}"
      else
        printf '2 build-list-package %s\n' "${pkg}"
      fi
    done >> \
    "${tmp_dir}/knots"

  (
    sort -u "${work_dir}/deletion-list"
    tr ' ' '\n' < \
      "${tmp_dir}/build-order" | \
      sort -u
  ) | \
    sort | \
    uniq -d | \
    xargs -r printf '3 deletion-list-package %s\n' >> \
    "${tmp_dir}/knots"

  (
    awk '{print $2}' "${tmp_dir}/known-split-packages" | \
      sort -u
    tr ' ' '\n' < \
      "${tmp_dir}/build-order" | \
      sort -u
  ) | \
    sort | \
    uniq -d | \
    xargs -r printf '4 split-package %s\n' >> \
    "${tmp_dir}/knots"

  (
    cat "${tmp_dir}/known-packages"
    tr ' ' '\n' < \
      "${tmp_dir}/build-order" | \
      sort -u
  ) | \
    sort | \
    uniq -d | \
    xargs -r printf '5 package %s\n' >> \
    "${tmp_dir}/knots"

  (
    awk '{print $2}' "${tmp_dir}/known-groups" | \
      sort -u
    tr ' ' '\n' < \
      "${tmp_dir}/build-order" | \
      sort -u
  ) | \
    sort | \
    uniq -d | \
    xargs -r printf '6 group %s\n' >> \
    "${tmp_dir}/knots"

  tr ' ' '\n' < \
    "${tmp_dir}/build-order" | \
    sort -u | \
    xargs -r printf '100 unknown %s\n' >> \
    "${tmp_dir}/knots"

  printf '%s\n' \
    'digraph dependencies {' \
    '  fontname=dejavu;' > \
    "${tmp_dir}/input"

  sort -k3,3 -k1n,1 "${tmp_dir}/knots" | \
    uniq -f2 | \
    while read -r num what who; do
      if [ "${what}" = 'broken-build-list-package' ]; then
        color='#ff0000'
      elif [ "${what}" = 'build-list-package' ]; then
        color='#800000'
      elif [ "${what}" = 'target-package' ]; then
        color='#00ff00'
      elif [ "${what}" = 'package' ]; then
        color='#000000'
      elif [ "${what}" = 'split-package' ]; then
        color='#8080ff'
      elif [ "${what}" = 'group' ]; then
        color='#0000ff'
      elif [ "${what}" = 'deletion-list-package' ]; then
        color='#808080'
      else
        color='#ff80ff'
      fi
      printf '  "%s" [fontcolor="%s"];\n' "${who}" "${color}"
    done >> \
    "${tmp_dir}/input"

  xargs -rn2 printf '  "%s" -> "%s";\n' < \
    "${tmp_dir}/build-order" | \
    sort -u >> \
    "${tmp_dir}/input"

  printf '%s\n' \
    '}' >> \
    "${tmp_dir}/input"

  line_count=$(wc -l < "${tmp_dir}/input")
  if [ "${line_count}" -gt 500 ]; then
    sed -i '/"base\(-devel\)\?"/d' "${tmp_dir}/input"
    line_count=$(wc -l < "${tmp_dir}/input")
    if [ "${line_count}" -gt 700 ]; then
      rm -f "${output}"
      >&2 printf 'Skipping graph for "%s" - would be too big (%d).\n' \
        "${target_package}" \
        "${line_count}"
      continue
    fi
  fi
  printf 'small enough (%s): %d\n' \
    "${target_package}" \
    "${line_count}"

  touch "${output}"
  chmod 644 "${output}"

  if ! dot -Tpng -o "${output}" "${tmp_dir}/input"; then
    rm -f "${output}"
    continue
  fi

done

rm "${work_dir}/${0##*/}.lock"