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#!/bin/sh

case $(hostname) in
  'rechenknecht') # on the master mirror
    tmp_dir=$(
      readlink -e "/tmp/${0##*/}."* || \
        mktemp -d "${0##*/}.XXXXXXXX" --tmpdir=/tmp
    )
    checksum=$(
      sha512sum "$0" | \
        awk '{print $1}'
    )
    cd "${tmp_dir}"
    for pkgfile in /srv/arch-mirror/arch/arch/archlinux32/pool/*-i686.pkg.tar.xz; do
      if [ -f "${pkgfile##*/}.so.needs" ]; then
        continue
      fi
      mkdir x
      bsdtar -xf "$pkgfile" -C x
      find 'x' \
        -name 'opt' -prune , \
        -type f \
        -exec objdump -x '{}' \; 2>/dev/null | \
        sed '
          /^architecture:.* i386:x86-64, /,/^architecture:.* i386:x86-32, / d
          /\sNEEDED\s/ {
            s/^\s*\S\+\s\+\(\S\+\)\(\s.*\)\?$/\1/
            /\.c32$/d
            s,^.*/,,
            t
          }
          /^Version References:$/,/^$/ {
            /^\s*required from / {
              s/^\s*required from \(\S\+\):\s*$/'"${checksum}"'\1/
              T end
              h
              d
            }
            s/^\s*\(0x[0-9a-fA-F]\+\)\s\+0x[0-9a-fA-F]\+\s\+[0-9]\+\s\+\(\S\+\)$/\2-\1/
            T end
            G
            s/^\(\S\+\)\n'"${checksum}"'\(\S\+\)$/\2-\1/
            t
          }
          :end
          d
        ' | \
        sort -u > \
        "${pkgfile##*/}.so.needs"
      sed -i '
        /^\(libav.*\.so\)\.[0-9]\+$/ {
          :a
          N
          s/^\(libav.*\.so\)\(\.[0-9]\+\)\?\n\1\.[0-9]\+$/\1/
          t a
          P
          D
        }
      ' "${pkgfile##*/}.so.needs"
      find 'x' \
        -name 'opt' -prune , \
        \( -type f -o -type l \) \
        -printf "${checksum}"'%f\n' \
        -exec objdump -x '{}' \; 2>/dev/null | \
        sed '
          /^architecture:.* i386:x86-64, /,/^architecture:.* i386:x86-32, / d
          /^'"${checksum}"'/ {
            h
            d
          }
          /\sSONAME\s/ {
            s/^\s*\S\+\s\+\(\S\+\)\s.*$/\1/
            t
          }
          /^Version definitions:$/,/^$/ {
            s/^[0-9]\+\s\+0x[0-9a-fA-F]\+\s\+\(0x[0-9a-fA-F]\+\)\s\+\(\S\+\)$/\2-\1/
            T end
            G
            s/^\(\S\+\)\n'"${checksum}"'\(\S\+\)$/\2-\1/
            t
          }
          :end
          d
        ' | \
        sort -u >> \
        "${pkgfile##*/}.so.provides"
      rm -rf --one-file-system x
      printf .
    done
  ;;
  'buildmaster.archlinux32.org') # on the buildmaster
    base_dir=~/builder
    . ~/builder/lib/load-configuration
    mysql_load_min_and_max_versions
    {
      printf 'SET @link_dep_id = ('
        printf 'SELECT `dependency_types`.`id`'
        printf ' FROM `dependency_types`'
        printf ' WHERE `dependency_types`.`name`="link"'
      printf ');'
      printf 'CREATE TEMPORARY TABLE `x` ('
        printf '`it` VARCHAR(128),'
        printf '`kind` VARCHAR(16),'
        printf '`pkgname` VARCHAR(64),'
        printf '`epoch` MEDIUMINT,'
        printf '`pkgver` VARCHAR(64),'
        printf '`pkgrel` MEDIUMINT,'
        printf '`spr_total` VARCHAR(8),'
        printf '`sub_pkgrel` MEDIUMINT,'
        printf '`architecture` VARCHAR(4),'
        printf 'UNIQUE KEY `content`(`it`,`kind`,`pkgname`,`epoch`,`pkgver`,`pkgrel`,`sub_pkgrel`,`architecture`)'
      printf ');\n'
      printf 'LOAD DATA LOCAL INFILE "%s" INTO TABLE `x`;\n' \
        ~/so-todos
      printf 'INSERT IGNORE INTO `install_targets`(`name`) SELECT `x`.`it` FROM `x`;\n'
      printf 'SELECT row_count();\n'
      printf 'INSERT IGNORE INTO `install_target_providers`('
        printf '`package`,'
        printf '`install_target`,'
        printf '`version`'
      printf ') SELECT '
      printf '`binary_packages`.`id`,'
      printf '`install_targets`.`id`,'
      printf '%s' \
        "${min_version_id}"
      printf ' FROM `x`'
      printf ' JOIN `install_targets`'
      printf ' ON `x`.`it`=`install_targets`.`name`'
      printf ' AND `x`.`kind`="provides"'
      printf ' JOIN `architectures`'
      printf ' ON `x`.`architecture`=`architectures`.`name`'
      mysql_join_architectures_binary_packages
      printf ' AND `binary_packages`.`pkgname`=`x`.`pkgname`'
      printf ' AND `binary_packages`.`epoch`=`x`.`epoch`'
      printf ' AND `binary_packages`.`pkgver`=`x`.`pkgver`'
      printf ' AND `binary_packages`.`pkgrel`=`x`.`pkgrel`'
      printf ' AND `binary_packages`.`sub_pkgrel`=`x`.`sub_pkgrel`'
      printf ' AND (`binary_packages`.`sub_pkgrel_omitted` = (`x`.`spr_total`=""));'
      printf 'SELECT row_count();'
      for version_info in \
        "${min_version_id},\">=\"" \
        "${max_version_id},\"<\""; do
        printf 'INSERT IGNORE INTO `dependencies` ('
        printf '`dependent`,'
        printf '`depending_on`,'
        printf '`dependency_type`,'
        printf '`version`,'
        printf '`version_relation`) SELECT '
        printf '`binary_packages`.`id`,'
        printf '`install_targets`.`id`,@link_dep_id,%s' \
          "${version_info}"
        printf ' FROM `x`'
        printf ' JOIN `install_targets`'
        printf ' ON `x`.`it`=`install_targets`.`name`'
        printf ' AND `x`.`kind`="needs"'
        printf ' JOIN `architectures` ON `x`.`architecture`=`architectures`.`name`'
        mysql_join_architectures_binary_packages
        printf ' AND `binary_packages`.`pkgname`=`x`.`pkgname`'
        printf ' AND `binary_packages`.`epoch`=`x`.`epoch`'
        printf ' AND `binary_packages`.`pkgver`=`x`.`pkgver`'
        printf ' AND `binary_packages`.`pkgrel`=`x`.`pkgrel`'
        printf ' AND `binary_packages`.`sub_pkgrel`=`x`.`sub_pkgrel`'
        printf ' AND (`binary_packages`.`sub_pkgrel_omitted` = (`x`.`spr_total`=""));'
        printf 'SELECT row_count();'
      done
    } | \
      mysql buildmaster
  ;;
  *) # on some intermediate box, e.g. on nlopc43
    ssh rechenknecht '
      cd /tmp/'"${0##*/}"'.*
      ls | \
        sed '"'"'
          s/^\(\S\+\)-\(\([^-:]\+\):\)\?\([^-:]\+\)-\([^-.]\+\)\(\.\([0-9]\+\)\)\?-\([^-]\+\)\.pkg\.tar\.xz\.so\.\(needs\|provides\)$/\0 \9 \1 \3 \4 \5 \6 \7 \8/
          t
          d
        '"'"' | \
        while read -r f r; do
          sed "
            s/\$/ $r/
          " "$f"
        done' | \
      pv --line-mode | \
      tr ' ' '\t' | \
      ssh buildmaster 'tee so-todos | wc -l'
  ;;
esac