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#!/bin/sh

set +e

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

for repo in \
  'archlinuxewe' \
  'community' \
  'community-staging' \
  'community-testing' \
  'core' \
  'extra' \
  'quarry' \
  'staging' \
  'testing'; do
  >&2 printf '%s ...' "${repo}"
  {
    curl -Ss 'https://arch.eckner.net/merged/'"${repo}"'/os/x86_64/'"${repo}"'.db.tar.gz' | \
      zcat 2>/dev/null || \
    {
      curl -Ss 'https://arch.eckner.net/merged/'"${repo}"'/os/x86_64/'"${repo}"'.db.tar.xz' | \
        xzcat 2>/dev/null
    }
  } | \
    tar -t --wildcards '*/desc' | \
    sed '
      s,-[^-]\+-[^-]\+/desc$,,
    ' > \
    "${tmp_dir}/${repo}.db"
  >&2 printf ' OK\n'
done

find "${tmp_dir}" -type f \
  -execdir grep -HF '' '{}' \; | \
  sed '
    s,^\./\([^/:]\+\)\.db:,\1 ,
    y/_/-/
  ' | \
  sort -k2,2 | \
  uniq -Df1 | \
  sed -n '
    /^archlinuxewe /{
      :a
      $!N
      s/\( \S\+\)\n\(\S\+\)\1/ \2\1/
      ta
      P
      D
    }
    d
  '